Pause between connection attempts.

Remove RemovableDrivePlugin, refactor plugin interface

Closes #25

See merge request akwizgran/briar!817

bramble-android/build.gradle

@@ -1,11 +1,5 @@
-import de.undercouch.gradle.tasks.download.Download
-import de.undercouch.gradle.tasks.download.Verify
-
-import java.security.NoSuchAlgorithmException
-
 apply plugin: 'com.android.library'
 apply plugin: 'witness'
-apply plugin: 'de.undercouch.download'
 
 android {
 	compileSdkVersion 27
@@ -25,9 +19,14 @@ android {
 	}
 }
 
+configurations {
+	tor
+}
+
 dependencies {
 	implementation project(path: ':bramble-core', configuration: 'default')
-	implementation fileTree(dir: 'libs', include: '*.jar')
+	implementation 'org.briarproject:jtorctl:0.3'
+	tor 'org.briarproject:tor-android:0.2.9.15@zip'
 
 	annotationProcessor 'com.google.dagger:dagger-compiler:2.0.2'
 
@@ -92,6 +91,8 @@ dependencyVerification {
 			'org.apache.httpcomponents:httpmime:4.1:httpmime-4.1.jar:31629566148e8a47688ae43b420abc3ecd783ed15b33bebc00824bf24c9b15aa',
 			'org.bouncycastle:bcpkix-jdk15on:1.56:bcpkix-jdk15on-1.56.jar:7043dee4e9e7175e93e0b36f45b1ec1ecb893c5f755667e8b916eb8dd201c6ca',
 			'org.bouncycastle:bcprov-jdk15on:1.56:bcprov-jdk15on-1.56.jar:963e1ee14f808ffb99897d848ddcdb28fa91ddda867eb18d303e82728f878349',
+			'org.briarproject:jtorctl:0.3:jtorctl-0.3.jar:f2939238a097898998432effe93b0334d97a787972ab3a91a8973a1d309fc864',
+			'org.briarproject:tor-android:0.2.9.15:tor-android-0.2.9.15.zip:34a6474ee219ffa52e0f3393e917dda6ed03d320b02247d4fa5075aa4094ee6d',
 			'org.codehaus.groovy:groovy-all:2.4.12:groovy-all-2.4.12.jar:6a56af4bd48903d56bec62821876cadefafd007360cc6bd0d8f7aa8d72b38be4',
 			'org.codehaus.mojo:animal-sniffer-annotations:1.14:animal-sniffer-annotations-1.14.jar:2068320bd6bad744c3673ab048f67e30bef8f518996fa380033556600669905d',
 			'org.glassfish.jaxb:jaxb-core:2.2.11:jaxb-core-2.2.11.jar:37bcaee8ebb04362c8352a5bf6221b86967ecdab5164c696b10b9a2bb587b2aa',
@@ -112,81 +113,9 @@ dependencyVerification {
 	]
 }
 
-ext.torBinaryDir = 'src/main/res/raw'
-ext.torVersion = '0.2.9.14'
-ext.geoipVersion = '2017-11-06'
-ext.torDownloadUrl = 'https://briarproject.org/build/'
-
-def torBinaries = [
-		"tor_arm"    : '1710ea6c47b7f4c1a88bdf4858c7893837635db10e8866854eed8d61629f50e8',
-		"tor_arm_pie": '974e6949507db8fa2ea45231817c2c3677ed4ccf5488a2252317d744b0be1917',
-		"tor_x86"    : '3a5e45b3f051fcda9353b098b7086e762ffe7ba9242f7d7c8bf6523faaa8b1e9',
-		"tor_x86_pie": 'd1d96d8ce1a4b68accf04850185780d10cd5563d3552f7e1f040f8ca32cb4e51',
-		"geoip"      : '8239b98374493529a29096e45fc5877d4d6fdad0146ad8380b291f90d61484ea'
-]
-
-def verifyOrDeleteBinary(name, chksum, alreadyVerified) {
-	return tasks.create("verifyOrDeleteBinary${name}", VerifyOrDelete) {
-		src "${torBinaryDir}/${name}.zip"
-		algorithm 'SHA-256'
-		checksum chksum
-		result alreadyVerified
-		onlyIf {
-			src.exists()
-		}
-	}
-}
-
-def downloadBinary(name, chksum, alreadyVerified) {
-	return tasks.create([
-			name: "downloadBinary${name}",
-			type: Download,
-			dependsOn: verifyOrDeleteBinary(name, chksum, alreadyVerified)]) {
-		src "${torDownloadUrl}${name}.zip"
-				.replace('tor_', "tor-${torVersion}-")
-				.replace('geoip', "geoip-${geoipVersion}")
-				.replaceAll('_', '-')
-		dest "${torBinaryDir}/${name}.zip"
-		onlyIf {
-			!dest.exists()
-		}
-	}
-}
-
-def verifyBinary(name, chksum) {
-	boolean[] alreadyVerified = [false]
-	return tasks.create([
-			name     : "verifyBinary${name}",
-			type     : Verify,
-			dependsOn: downloadBinary(name, chksum, alreadyVerified)]) {
-		src "${torBinaryDir}/${name}.zip"
-		algorithm 'SHA-256'
-		checksum chksum
-		onlyIf {
-			!alreadyVerified[0]
-		}
-	}
-}
-
 project.afterEvaluate {
-	torBinaries.every { name, checksum ->
-		preBuild.dependsOn.add(verifyBinary(name, checksum))
-	}
-}
-
-class VerifyOrDelete extends Verify {
-
-	boolean[] result
-
-	@TaskAction
-	@Override
-	void verify() throws IOException, NoSuchAlgorithmException {
-		try {
-			super.verify()
-			result[0] = true
-		} catch (Exception e) {
-			println "${src} failed verification - deleting"
-			src.delete()
-		}
+	copy {
+		from configurations.tor.collect { zipTree(it) }
+		into 'src/main/res/raw'
 	}
 }

bramble-android/src/main/java/org/briarproject/bramble/BrambleAndroidModule.java

@@ -1,12 +1,10 @@
 package org.briarproject.bramble;
 
-import org.briarproject.bramble.plugin.AndroidPluginModule;
 import org.briarproject.bramble.system.AndroidSystemModule;
 
 import dagger.Module;
 
 @Module(includes = {
-		AndroidPluginModule.class,
 		AndroidSystemModule.class
 })
 public class BrambleAndroidModule {

bramble-android/src/main/java/org/briarproject/bramble/plugin/AndroidPluginModule.java

@@ -1,67 +0,0 @@
-package org.briarproject.bramble.plugin;
-
-import android.app.Application;
-import android.content.Context;
-
-import org.briarproject.bramble.api.event.EventBus;
-import org.briarproject.bramble.api.lifecycle.IoExecutor;
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.plugin.BackoffFactory;
-import org.briarproject.bramble.api.plugin.PluginConfig;
-import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory;
-import org.briarproject.bramble.api.plugin.simplex.SimplexPluginFactory;
-import org.briarproject.bramble.api.system.AndroidExecutor;
-import org.briarproject.bramble.api.system.LocationUtils;
-import org.briarproject.bramble.api.system.Scheduler;
-import org.briarproject.bramble.plugin.bluetooth.AndroidBluetoothPluginFactory;
-import org.briarproject.bramble.plugin.tcp.AndroidLanTcpPluginFactory;
-import org.briarproject.bramble.plugin.tor.TorPluginFactory;
-
-import java.security.SecureRandom;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.concurrent.Executor;
-import java.util.concurrent.ScheduledExecutorService;
-
-import javax.net.SocketFactory;
-
-import dagger.Module;
-import dagger.Provides;
-
-@Module
-public class AndroidPluginModule {
-
-	@Provides
-	PluginConfig providePluginConfig(@IoExecutor Executor ioExecutor,
-			@Scheduler ScheduledExecutorService scheduler,
-			AndroidExecutor androidExecutor, SecureRandom random,
-			SocketFactory torSocketFactory, BackoffFactory backoffFactory,
-			Application app, LocationUtils locationUtils, EventBus eventBus) {
-		Context appContext = app.getApplicationContext();
-		DuplexPluginFactory bluetooth =
-				new AndroidBluetoothPluginFactory(ioExecutor, androidExecutor,
-						appContext, random, eventBus, backoffFactory);
-		DuplexPluginFactory tor = new TorPluginFactory(ioExecutor, scheduler,
-				appContext, locationUtils, eventBus, torSocketFactory,
-				backoffFactory);
-		DuplexPluginFactory lan = new AndroidLanTcpPluginFactory(ioExecutor,
-				scheduler, backoffFactory, appContext);
-		Collection<DuplexPluginFactory> duplex =
-				Arrays.asList(bluetooth, tor, lan);
-		@NotNullByDefault
-		PluginConfig pluginConfig = new PluginConfig() {
-
-			@Override
-			public Collection<DuplexPluginFactory> getDuplexFactories() {
-				return duplex;
-			}
-
-			@Override
-			public Collection<SimplexPluginFactory> getSimplexFactories() {
-				return Collections.emptyList();
-			}
-		};
-		return pluginConfig;
-	}
-}

bramble-android/src/main/java/org/briarproject/bramble/plugin/tor/TorPlugin.java

@@ -50,7 +50,6 @@ import java.net.InetSocketAddress;
 import java.net.ServerSocket;
 import java.net.Socket;
 import java.util.Arrays;
-import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
@@ -334,7 +333,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		return zin;
 	}
 
-	private InputStream getConfigInputStream() throws IOException {
+	private InputStream getConfigInputStream() {
 		int resId = getResourceId("torrc");
 		return appContext.getResources().openRawResource(resId);
 	}
@@ -499,7 +498,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	}
 
 	@Override
-	public void stop() throws PluginException {
+	public void stop() {
 		running = false;
 		tryToClose(socket);
 		if (networkStateReceiver != null)
@@ -533,20 +532,16 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	}
 
 	@Override
-	public void poll(Collection<ContactId> connected) {
+	public void poll(Map<ContactId, TransportProperties> contacts) {
 		if (!isRunning()) return;
 		backoff.increment();
-		Map<ContactId, TransportProperties> remote =
-				callback.getRemoteProperties();
-		for (Entry<ContactId, TransportProperties> e : remote.entrySet()) {
-			ContactId c = e.getKey();
-			if (!connected.contains(c)) connectAndCallBack(c, e.getValue());
+		for (Entry<ContactId, TransportProperties> e : contacts.entrySet()) {
+			connectAndCallBack(e.getKey(), e.getValue());
 		}
 	}
 
 	private void connectAndCallBack(ContactId c, TransportProperties p) {
 		ioExecutor.execute(() -> {
-			if (!isRunning()) return;
 			DuplexTransportConnection d = createConnection(p);
 			if (d != null) {
 				backoff.reset();
@@ -556,13 +551,8 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	}
 
 	@Override
-	public DuplexTransportConnection createConnection(ContactId c) {
+	public DuplexTransportConnection createConnection(TransportProperties p) {
 		if (!isRunning()) return null;
-		return createConnection(callback.getRemoteProperties(c));
-	}
-
-	@Nullable
-	private DuplexTransportConnection createConnection(TransportProperties p) {
 		String onion = p.get(PROP_ONION);
 		if (StringUtils.isNullOrEmpty(onion)) return null;
 		if (!ONION.matcher(onion).matches()) {

bramble-android/src/main/java/org/briarproject/bramble/util/AndroidUtils.java

@@ -15,7 +15,6 @@ import java.util.List;
 import java.util.logging.Logger;
 
 import static android.content.Context.MODE_PRIVATE;
-import static java.util.logging.Level.INFO;
 
 public class AndroidUtils {
 
@@ -59,57 +58,28 @@ public class AndroidUtils {
 				&& !address.equals(FAKE_BLUETOOTH_ADDRESS);
 	}
 
-	public static void logDataDirContents(Context ctx) {
-		if (LOG.isLoggable(INFO)) {
-			LOG.info("Contents of data directory:");
-			logFileOrDir(new File(ctx.getApplicationInfo().dataDir));
-		}
-	}
-
-	private static void logFileOrDir(File f) {
-		LOG.info(f.getAbsolutePath() + " " + f.length());
-		if (f.isDirectory()) {
-			File[] children = f.listFiles();
-			if (children == null) {
-				LOG.info("Could not list files in " + f.getAbsolutePath());
-			} else {
-				for (File child : children) logFileOrDir(child);
-			}
-		}
-	}
-
 	public static void deleteAppData(Context ctx, SharedPreferences... clear) {
 		// Clear and commit shared preferences
 		for (SharedPreferences prefs : clear) {
-			boolean cleared = prefs.edit().clear().commit();
-			if (LOG.isLoggable(INFO)) {
-				if (cleared) LOG.info("Cleared shared preferences");
-				else LOG.info("Could not clear shared preferences");
-			}
+			if (!prefs.edit().clear().commit())
+				LOG.warning("Could not clear shared preferences");
 		}
 		// Delete files, except lib and shared_prefs directories
 		File dataDir = new File(ctx.getApplicationInfo().dataDir);
-		if (LOG.isLoggable(INFO))
-			LOG.info("Deleting app data from " + dataDir.getAbsolutePath());
 		File[] children = dataDir.listFiles();
-		if (children != null) {
+		if (children == null) {
+			LOG.warning("Could not list files in app data dir");
+		} else {
 			for (File child : children) {
 				String name = child.getName();
 				if (!name.equals("lib") && !name.equals("shared_prefs")) {
-					if (LOG.isLoggable(INFO))
-						LOG.info("Deleting " + child.getAbsolutePath());
 					IoUtils.deleteFileOrDir(child);
 				}
 			}
-		} else if (LOG.isLoggable(INFO)) {
-			LOG.info("Could not list files in " + dataDir.getAbsolutePath());
 		}
 		// Recreate the cache dir as some OpenGL drivers expect it to exist
-		boolean recreated = new File(dataDir, "cache").mkdir();
-		if (LOG.isLoggable(INFO)) {
-			if (recreated) LOG.info("Recreated cache dir");
-			else LOG.info("Could not recreate cache dir");
-		}
+		if (!new File(dataDir, "cache").mkdir())
+			LOG.warning("Could not recreate cache dir");
 	}
 
 	public static File getReportDir(Context ctx) {

bramble-api/src/main/java/org/briarproject/bramble/api/plugin/FileConstants.java

@@ -0,0 +1,6 @@
+package org.briarproject.bramble.api.plugin;
+
+public interface FileConstants {
+
+	String PROP_PATH = "path";
+}

bramble-api/src/main/java/org/briarproject/bramble/api/plugin/Plugin.java

@@ -2,8 +2,9 @@ package org.briarproject.bramble.api.plugin;
 
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.properties.TransportProperties;
 
-import java.util.Collection;
+import java.util.Map;
 
 @NotNullByDefault
 public interface Plugin {
@@ -39,21 +40,19 @@ public interface Plugin {
 	boolean isRunning();
 
 	/**
-	 * Returns true if the plugin's {@link #poll(Collection)} method should be
-	 * called periodically to attempt to establish connections.
+	 * Returns true if the plugin should be polled periodically to attempt to
+	 * establish connections.
 	 */
 	boolean shouldPoll();
 
 	/**
-	 * Returns the desired interval in milliseconds between calls to the
-	 * plugin's {@link #poll(Collection)} method.
+	 * Returns the desired interval in milliseconds between polling attempts.
 	 */
 	int getPollingInterval();
 
 	/**
-	 * Attempts to establish connections to contacts, passing any created
-	 * connections to the callback. To avoid creating redundant connections,
-	 * the plugin may exclude the given contacts from polling.
+	 * Attempts to establish connections to the given contacts, passing any
+	 * created connections to the callback.
 	 */
-	void poll(Collection<ContactId> connected);
+	void poll(Map<ContactId, TransportProperties> contacts);
 }

bramble-api/src/main/java/org/briarproject/bramble/api/plugin/PluginCallback.java

@@ -1,12 +1,9 @@
 package org.briarproject.bramble.api.plugin;
 
-import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.properties.TransportProperties;
 import org.briarproject.bramble.api.settings.Settings;
 
-import java.util.Map;
-
 /**
  * An interface through which a transport plugin interacts with the rest of
  * the application.
@@ -25,17 +22,7 @@ public interface PluginCallback {
 	TransportProperties getLocalProperties();
 
 	/**
-	 * Returns the plugin's remote transport properties.
-	 */
-	Map<ContactId, TransportProperties> getRemoteProperties();
-
-	/**
-	 * Returns the plugin's remote transport properties for the given contact.
-	 */
-	TransportProperties getRemoteProperties(ContactId c);
-
-	/**
-	 * Merges the given settings with the namespaced settings
+	 * Merges the given settings with the plugin's settings
 	 */
 	void mergeSettings(Settings s);
 
@@ -45,34 +32,12 @@ public interface PluginCallback {
 	void mergeLocalProperties(TransportProperties p);
 
 	/**
-	 * Presents the user with a choice among two or more named options and
-	 * returns the user's response. The message may consist of a translatable
-	 * format string and arguments.
-	 *
-	 * @return an index into the array of options indicating the user's choice,
-	 * or -1 if the user cancelled the choice.
-	 */
-	int showChoice(String[] options, String... message);
-
-	/**
-	 * Asks the user to confirm an action and returns the user's response. The
-	 * message may consist of a translatable format string and arguments.
-	 */
-	boolean showConfirmationMessage(String... message);
-
-	/**
-	 * Shows a message to the user. The message may consist of a translatable
-	 * format string and arguments.
-	 */
-	void showMessage(String... message);
-
-	/**
-	 * Signal that the transport got enabled.
+	 * Signals that the transport is enabled.
 	 */
 	void transportEnabled();
 
 	/**
-	 * Signal that the transport got disabled.
+	 * Signals that the transport is disabled.
 	 */
 	void transportDisabled();
 }

bramble-api/src/main/java/org/briarproject/bramble/api/plugin/PluginConfig.java

@@ -12,4 +12,6 @@ public interface PluginConfig {
 	Collection<DuplexPluginFactory> getDuplexFactories();
 
 	Collection<SimplexPluginFactory> getSimplexFactories();
+
+	boolean shouldPoll();
 }

bramble-api/src/main/java/org/briarproject/bramble/api/plugin/TransportConnectionWriter.java

@@ -22,11 +22,6 @@ public interface TransportConnectionWriter {
 	 */
 	int getMaxIdleTime();
 
-	/**
-	 * Returns the capacity of the transport connection in bytes.
-	 */
-	long getCapacity();
-
 	/**
 	 * Returns an output stream for writing to the transport connection.
 	 */

bramble-api/src/main/java/org/briarproject/bramble/api/plugin/duplex/AbstractDuplexTransportConnection.java

@@ -71,11 +71,6 @@ public abstract class AbstractDuplexTransportConnection
 			return plugin.getMaxIdleTime();
 		}
 
-		@Override
-		public long getCapacity() {
-			return Long.MAX_VALUE;
-		}
-
 		@Override
 		public OutputStream getOutputStream() throws IOException {
 			return AbstractDuplexTransportConnection.this.getOutputStream();

bramble-api/src/main/java/org/briarproject/bramble/api/plugin/duplex/DuplexPlugin.java

@@ -1,10 +1,10 @@
 package org.briarproject.bramble.api.plugin.duplex;
 
-import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.data.BdfList;
 import org.briarproject.bramble.api.keyagreement.KeyAgreementListener;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.Plugin;
+import org.briarproject.bramble.api.properties.TransportProperties;
 
 import javax.annotation.Nullable;
 
@@ -15,12 +15,11 @@ import javax.annotation.Nullable;
 public interface DuplexPlugin extends Plugin {
 
 	/**
-	 * Attempts to create and return a connection to the given contact using
-	 * the current transport and configuration properties. Returns null if a
-	 * connection cannot be created.
+	 * Attempts to create and return a connection using the given transport
+	 * properties. Returns null if a connection cannot be created.
 	 */
 	@Nullable
-	DuplexTransportConnection createConnection(ContactId c);
+	DuplexTransportConnection createConnection(TransportProperties p);
 
 	/**
 	 * Returns true if the plugin supports short-range key agreement.

bramble-api/src/main/java/org/briarproject/bramble/api/plugin/duplex/DuplexPluginCallback.java

@@ -5,7 +5,8 @@ import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.PluginCallback;
 
 /**
- * An interface for handling connections created by a duplex transport plugin.
+ * An interface through which a duplex plugin interacts with the rest of the
+ * application.
  */
 @NotNullByDefault
 public interface DuplexPluginCallback extends PluginCallback {

bramble-api/src/main/java/org/briarproject/bramble/api/plugin/simplex/SimplexPlugin.java

@@ -1,10 +1,10 @@
 package org.briarproject.bramble.api.plugin.simplex;
 
-import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.Plugin;
 import org.briarproject.bramble.api.plugin.TransportConnectionReader;
 import org.briarproject.bramble.api.plugin.TransportConnectionWriter;
+import org.briarproject.bramble.api.properties.TransportProperties;
 
 import javax.annotation.Nullable;
 
@@ -15,18 +15,16 @@ import javax.annotation.Nullable;
 public interface SimplexPlugin extends Plugin {
 
 	/**
-	 * Attempts to create and return a reader for the given contact using the
-	 * current transport and configuration properties. Returns null if a reader
-	 * cannot be created.
+	 * Attempts to create and return a reader for the given transport
+	 * properties. Returns null if a reader cannot be created.
 	 */
 	@Nullable
-	TransportConnectionReader createReader(ContactId c);
+	TransportConnectionReader createReader(TransportProperties p);
 
 	/**
-	 * Attempts to create and return a writer for the given contact using the
-	 * current transport and configuration properties. Returns null if a writer
-	 * cannot be created.
+	 * Attempts to create and return a writer for the given transport
+	 * properties. Returns null if a writer cannot be created.
 	 */
 	@Nullable
-	TransportConnectionWriter createWriter(ContactId c);
+	TransportConnectionWriter createWriter(TransportProperties p);
 }

bramble-api/src/main/java/org/briarproject/bramble/api/plugin/simplex/SimplexPluginCallback.java

@@ -7,8 +7,8 @@ import org.briarproject.bramble.api.plugin.TransportConnectionReader;
 import org.briarproject.bramble.api.plugin.TransportConnectionWriter;
 
 /**
- * An interface for handling readers and writers created by a simplex transport
- * plugin.
+ * An interface through which a simplex plugin interacts with the rest of the
+ * application.
  */
 @NotNullByDefault
 public interface SimplexPluginCallback extends PluginCallback {

bramble-api/src/main/java/org/briarproject/bramble/api/ui/UiCallback.java

@@ -1,26 +0,0 @@
-package org.briarproject.bramble.api.ui;
-
-public interface UiCallback {
-
-	/**
-	 * Presents the user with a choice among two or more named options and
-	 * returns the user's response. The message may consist of a translatable
-	 * format string and arguments.
-	 *
-	 * @return an index into the array of options indicating the user's choice,
-	 * or -1 if the user cancelled the choice.
-	 */
-	int showChoice(String[] options, String... message);
-
-	/**
-	 * Asks the user to confirm an action and returns the user's response. The
-	 * message may consist of a translatable format string and arguments.
-	 */
-	boolean showConfirmationMessage(String... message);
-
-	/**
-	 * Shows a message to the user. The message may consist of a translatable
-	 * format string and arguments.
-	 */
-	void showMessage(String... message);
-}

bramble-api/src/main/java/org/briarproject/bramble/util/IoUtils.java

@@ -13,7 +13,7 @@ import java.util.logging.Logger;
 
 import javax.annotation.Nullable;
 
-import static java.util.logging.Level.INFO;
+import static java.util.logging.Level.WARNING;
 
 @NotNullByDefault
 public class IoUtils {
@@ -25,18 +25,21 @@ public class IoUtils {
 			delete(f);
 		} else if (f.isDirectory()) {
 			File[] children = f.listFiles();
-			if (children != null)
+			if (children == null) {
+				if (LOG.isLoggable(WARNING)) {
+					LOG.warning("Could not list files in "
+							+ f.getAbsolutePath());
+				}
+			} else {
 				for (File child : children) deleteFileOrDir(child);
+			}
 			delete(f);
 		}
 	}
 
 	private static void delete(File f) {
-		boolean deleted = f.delete();
-		if (LOG.isLoggable(INFO)) {
-			if (deleted) LOG.info("Deleted " + f.getAbsolutePath());
-			else LOG.info("Could not delete " + f.getAbsolutePath());
-		}
+		if (!f.delete() && LOG.isLoggable(WARNING))
+			LOG.warning("Could not delete " + f.getAbsolutePath());
 	}
 
 	public static void copyAndClose(InputStream in, OutputStream out) {

bramble-api/src/main/java/org/briarproject/bramble/util/OsUtils.java

@@ -22,19 +22,6 @@ public class OsUtils {
 		return os != null && os.contains("Mac OS");
 	}
 
-	public static boolean isMacLeopardOrNewer() {
-		if (!isMac() || version == null) return false;
-		try {
-			String[] v = version.split("\\.");
-			if (v.length != 3) return false;
-			int major = Integer.parseInt(v[0]);
-			int minor = Integer.parseInt(v[1]);
-			return major >= 10 && minor >= 5;
-		} catch (NumberFormatException e) {
-			return false;
-		}
-	}
-
 	public static boolean isLinux() {
 		return os != null && os.contains("Linux") && !isAndroid();
 	}

bramble-core/src/main/java/org/briarproject/bramble/plugin/PluginManagerImpl.java

@@ -8,6 +8,7 @@ import org.briarproject.bramble.api.lifecycle.Service;
 import org.briarproject.bramble.api.lifecycle.ServiceException;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.ConnectionManager;
+import org.briarproject.bramble.api.plugin.ConnectionRegistry;
 import org.briarproject.bramble.api.plugin.Plugin;
 import org.briarproject.bramble.api.plugin.PluginCallback;
 import org.briarproject.bramble.api.plugin.PluginConfig;
@@ -29,17 +30,19 @@ import org.briarproject.bramble.api.properties.TransportProperties;
 import org.briarproject.bramble.api.properties.TransportPropertyManager;
 import org.briarproject.bramble.api.settings.Settings;
 import org.briarproject.bramble.api.settings.SettingsManager;
-import org.briarproject.bramble.api.ui.UiCallback;
+import org.briarproject.bramble.api.system.Clock;
+import org.briarproject.bramble.api.system.Scheduler;
 
+import java.security.SecureRandom;
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.Executor;
+import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.logging.Logger;
 
@@ -57,12 +60,15 @@ class PluginManagerImpl implements PluginManager, Service {
 			Logger.getLogger(PluginManagerImpl.class.getName());
 
 	private final Executor ioExecutor;
+	private final ScheduledExecutorService scheduler;
 	private final EventBus eventBus;
 	private final PluginConfig pluginConfig;
 	private final ConnectionManager connectionManager;
+	private final ConnectionRegistry connectionRegistry;
 	private final SettingsManager settingsManager;
 	private final TransportPropertyManager transportPropertyManager;
-	private final UiCallback uiCallback;
+	private final SecureRandom random;
+	private final Clock clock;
 	private final Map<TransportId, Plugin> plugins;
 	private final List<SimplexPlugin> simplexPlugins;
 	private final List<DuplexPlugin> duplexPlugins;
@@ -70,27 +76,41 @@ class PluginManagerImpl implements PluginManager, Service {
 	private final AtomicBoolean used = new AtomicBoolean(false);
 
 	@Inject
-	PluginManagerImpl(@IoExecutor Executor ioExecutor, EventBus eventBus,
+	PluginManagerImpl(@IoExecutor Executor ioExecutor,
+			@Scheduler ScheduledExecutorService scheduler, EventBus eventBus,
 			PluginConfig pluginConfig, ConnectionManager connectionManager,
+			ConnectionRegistry connectionRegistry,
 			SettingsManager settingsManager,
 			TransportPropertyManager transportPropertyManager,
-			UiCallback uiCallback) {
+			SecureRandom random, Clock clock) {
 		this.ioExecutor = ioExecutor;
+		this.scheduler = scheduler;
 		this.eventBus = eventBus;
 		this.pluginConfig = pluginConfig;
 		this.connectionManager = connectionManager;
+		this.connectionRegistry = connectionRegistry;
 		this.settingsManager = settingsManager;
 		this.transportPropertyManager = transportPropertyManager;
-		this.uiCallback = uiCallback;
+		this.random = random;
+		this.clock = clock;
 		plugins = new ConcurrentHashMap<>();
 		simplexPlugins = new CopyOnWriteArrayList<>();
 		duplexPlugins = new CopyOnWriteArrayList<>();
 		startLatches = new ConcurrentHashMap<>();
+
 	}
 
 	@Override
-	public void startService() throws ServiceException {
+	public void startService() {
 		if (used.getAndSet(true)) throw new IllegalStateException();
+		// Instantiate the poller
+		if (pluginConfig.shouldPoll()) {
+			LOG.info("Starting poller");
+			Poller poller = new Poller(ioExecutor, scheduler, connectionManager,
+					connectionRegistry, this, transportPropertyManager, random,
+					clock);
+			eventBus.addListener(poller);
+		}
 		// Instantiate the simplex plugins and start them asynchronously
 		LOG.info("Starting simplex plugins");
 		for (SimplexPluginFactory f : pluginConfig.getSimplexFactories()) {
@@ -273,26 +293,6 @@ class PluginManagerImpl implements PluginManager, Service {
 			}
 		}
 
-		@Override
-		public Map<ContactId, TransportProperties> getRemoteProperties() {
-			try {
-				return transportPropertyManager.getRemoteProperties(id);
-			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
-				return Collections.emptyMap();
-			}
-		}
-
-		@Override
-		public TransportProperties getRemoteProperties(ContactId c) {
-			try {
-				return transportPropertyManager.getRemoteProperties(c, id);
-			} catch (DbException e) {
-				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
-				return new TransportProperties();
-			}
-		}
-
 		@Override
 		public void mergeSettings(Settings s) {
 			try {
@@ -311,21 +311,6 @@ class PluginManagerImpl implements PluginManager, Service {
 			}
 		}
 
-		@Override
-		public int showChoice(String[] options, String... message) {
-			return uiCallback.showChoice(options, message);
-		}
-
-		@Override
-		public boolean showConfirmationMessage(String... message) {
-			return uiCallback.showConfirmationMessage(message);
-		}
-
-		@Override
-		public void showMessage(String... message) {
-			uiCallback.showMessage(message);
-		}
-
 		@Override
 		public void transportEnabled() {
 			eventBus.broadcast(new TransportEnabledEvent(id));

bramble-core/src/main/java/org/briarproject/bramble/plugin/PluginModule.java

@@ -1,18 +1,10 @@
 package org.briarproject.bramble.plugin;
 
-import org.briarproject.bramble.api.event.EventBus;
-import org.briarproject.bramble.api.lifecycle.IoExecutor;
 import org.briarproject.bramble.api.lifecycle.LifecycleManager;
 import org.briarproject.bramble.api.plugin.BackoffFactory;
 import org.briarproject.bramble.api.plugin.ConnectionManager;
 import org.briarproject.bramble.api.plugin.ConnectionRegistry;
 import org.briarproject.bramble.api.plugin.PluginManager;
-import org.briarproject.bramble.api.system.Clock;
-import org.briarproject.bramble.api.system.Scheduler;
-
-import java.security.SecureRandom;
-import java.util.concurrent.Executor;
-import java.util.concurrent.ScheduledExecutorService;
 
 import javax.inject.Inject;
 import javax.inject.Singleton;
@@ -26,8 +18,6 @@ public class PluginModule {
 	public static class EagerSingletons {
 		@Inject
 		PluginManager pluginManager;
-		@Inject
-		Poller poller;
 	}
 
 	@Provides
@@ -35,19 +25,6 @@ public class PluginModule {
 		return new BackoffFactoryImpl();
 	}
 
-	@Provides
-	@Singleton
-	Poller providePoller(@IoExecutor Executor ioExecutor,
-			@Scheduler ScheduledExecutorService scheduler,
-			ConnectionManager connectionManager,
-			ConnectionRegistry connectionRegistry, PluginManager pluginManager,
-			SecureRandom random, Clock clock, EventBus eventBus) {
-		Poller poller = new Poller(ioExecutor, scheduler, connectionManager,
-				connectionRegistry, pluginManager, random, clock);
-		eventBus.addListener(poller);
-		return poller;
-	}
-
 	@Provides
 	@Singleton
 	ConnectionManager provideConnectionManager(

bramble-core/src/main/java/org/briarproject/bramble/plugin/Poller.java

@@ -2,6 +2,7 @@ package org.briarproject.bramble.plugin;
 
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.contact.event.ContactStatusChangedEvent;
+import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.event.Event;
 import org.briarproject.bramble.api.event.EventListener;
 import org.briarproject.bramble.api.lifecycle.IoExecutor;
@@ -19,12 +20,17 @@ import org.briarproject.bramble.api.plugin.event.ConnectionOpenedEvent;
 import org.briarproject.bramble.api.plugin.event.TransportDisabledEvent;
 import org.briarproject.bramble.api.plugin.event.TransportEnabledEvent;
 import org.briarproject.bramble.api.plugin.simplex.SimplexPlugin;
+import org.briarproject.bramble.api.properties.TransportProperties;
+import org.briarproject.bramble.api.properties.TransportPropertyManager;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.system.Scheduler;
 
 import java.security.SecureRandom;
+import java.util.Collection;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.Map;
+import java.util.Set;
 import java.util.concurrent.Executor;
 import java.util.concurrent.Future;
 import java.util.concurrent.ScheduledExecutorService;
@@ -33,10 +39,10 @@ import java.util.concurrent.locks.ReentrantLock;
 import java.util.logging.Logger;
 
 import javax.annotation.concurrent.ThreadSafe;
-import javax.inject.Inject;
 
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
 import static java.util.logging.Level.INFO;
+import static java.util.logging.Level.WARNING;
 
 @ThreadSafe
 @NotNullByDefault
@@ -49,26 +55,30 @@ class Poller implements EventListener {
 	private final ConnectionManager connectionManager;
 	private final ConnectionRegistry connectionRegistry;
 	private final PluginManager pluginManager;
+	private final TransportPropertyManager transportPropertyManager;
 	private final SecureRandom random;
 	private final Clock clock;
 	private final Lock lock;
 	private final Map<TransportId, ScheduledPollTask> tasks; // Locking: lock
+	private final Set<TransportId> polling; // Locking: lock
 
-	@Inject
 	Poller(@IoExecutor Executor ioExecutor,
 			@Scheduler ScheduledExecutorService scheduler,
 			ConnectionManager connectionManager,
 			ConnectionRegistry connectionRegistry, PluginManager pluginManager,
+			TransportPropertyManager transportPropertyManager,
 			SecureRandom random, Clock clock) {
 		this.ioExecutor = ioExecutor;
 		this.scheduler = scheduler;
 		this.connectionManager = connectionManager;
 		this.connectionRegistry = connectionRegistry;
 		this.pluginManager = pluginManager;
+		this.transportPropertyManager = transportPropertyManager;
 		this.random = random;
 		this.clock = clock;
 		lock = new ReentrantLock();
 		tasks = new HashMap<>();
+		polling = new HashSet<>();
 	}
 
 	@Override
@@ -120,10 +130,15 @@ class Poller implements EventListener {
 	private void connectToContact(ContactId c, SimplexPlugin p) {
 		ioExecutor.execute(() -> {
 			TransportId t = p.getId();
-			if (!connectionRegistry.isConnected(c, t)) {
-				TransportConnectionWriter w = p.createWriter(c);
+			if (connectionRegistry.isConnected(c, t)) return;
+			try {
+				TransportProperties props =
+						transportPropertyManager.getRemoteProperties(c, t);
+				TransportConnectionWriter w = p.createWriter(props);
 				if (w != null)
 					connectionManager.manageOutgoingConnection(c, t, w);
+			} catch (DbException e) {
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}
@@ -131,10 +146,15 @@ class Poller implements EventListener {
 	private void connectToContact(ContactId c, DuplexPlugin p) {
 		ioExecutor.execute(() -> {
 			TransportId t = p.getId();
-			if (!connectionRegistry.isConnected(c, t)) {
-				DuplexTransportConnection d = p.createConnection(c);
+			if (connectionRegistry.isConnected(c, t)) return;
+			try {
+				TransportProperties props =
+						transportPropertyManager.getRemoteProperties(c, t);
+				DuplexTransportConnection d = p.createConnection(props);
 				if (d != null)
 					connectionManager.manageOutgoingConnection(c, t, d);
+			} catch (DbException e) {
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}
@@ -186,7 +206,17 @@ class Poller implements EventListener {
 	private void poll(Plugin p) {
 		TransportId t = p.getId();
 		if (LOG.isLoggable(INFO)) LOG.info("Polling plugin " + t);
-		p.poll(connectionRegistry.getConnectedContacts(t));
+		try {
+			Map<ContactId, TransportProperties> remote =
+					transportPropertyManager.getRemoteProperties(t);
+			Collection<ContactId> connected =
+					connectionRegistry.getConnectedContacts(t);
+			remote = new HashMap<>(remote);
+			remote.keySet().removeAll(connected);
+			if (!remote.isEmpty()) p.poll(remote);
+		} catch (DbException e) {
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+		}
 	}
 
 	private class ScheduledPollTask {
@@ -215,20 +245,33 @@ class Poller implements EventListener {
 		@Override
 		@IoExecutor
 		public void run() {
+			TransportId t = plugin.getId();
+			boolean shouldPoll;
 			lock.lock();
 			try {
-				TransportId t = plugin.getId();
 				ScheduledPollTask scheduled = tasks.get(t);
 				if (scheduled != null && scheduled.task != this)
 					return; // Replaced by another task
 				tasks.remove(t);
+				// Don't poll again if last poll is still running
+				shouldPoll = polling.add(t);
 			} finally {
 				lock.unlock();
 			}
 			int delay = plugin.getPollingInterval();
 			if (randomiseNext) delay = (int) (delay * random.nextDouble());
 			schedule(plugin, delay, false);
-			poll(plugin);
+			if (shouldPoll) {
+				poll(plugin);
+			} else if (LOG.isLoggable(INFO)) {
+				LOG.info("Last poll for " + t + " is still running");
+			}
+			lock.lock();
+			try {
+				polling.remove(t);
+			} finally {
+				lock.unlock();
+			}
 		}
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/plugin/bluetooth/BluetoothPlugin.java

@@ -26,9 +26,10 @@ import org.briarproject.bramble.util.StringUtils;
 
 import java.io.IOException;
 import java.security.SecureRandom;
-import java.util.Collection;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
 import java.util.Map;
-import java.util.Map.Entry;
 import java.util.UUID;
 import java.util.concurrent.Executor;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -53,6 +54,12 @@ abstract class BluetoothPlugin<SS> implements DuplexPlugin, EventListener {
 	private static final Logger LOG =
 			Logger.getLogger(BluetoothPlugin.class.getName());
 
+	/**
+	 * How many milliseconds to pause between connection attempts when
+	 * polling, to avoid interfering with other Bluetooth or wifi connections.
+	 */
+	private static final int POLLING_PAUSE_MS = 1000;
+
 	final BluetoothConnectionLimiter connectionLimiter;
 
 	private final Executor ioExecutor;
@@ -250,30 +257,42 @@ abstract class BluetoothPlugin<SS> implements DuplexPlugin, EventListener {
 	}
 
 	@Override
-	public void poll(Collection<ContactId> connected) {
+	public void poll(Map<ContactId, TransportProperties> contacts) {
 		if (!isRunning() || !shouldAllowContactConnections()) return;
 		backoff.increment();
-		// Try to connect to known devices in parallel
-		Map<ContactId, TransportProperties> remote =
-				callback.getRemoteProperties();
-		for (Entry<ContactId, TransportProperties> e : remote.entrySet()) {
-			ContactId c = e.getKey();
-			if (connected.contains(c)) continue;
-			String address = e.getValue().get(PROP_ADDRESS);
-			if (StringUtils.isNullOrEmpty(address)) continue;
-			String uuid = e.getValue().get(PROP_UUID);
-			if (StringUtils.isNullOrEmpty(uuid)) continue;
-			ioExecutor.execute(() -> {
+		// Try to connect to known devices in a random order
+		List<ContactId> keys = new ArrayList<>(contacts.keySet());
+		Collections.shuffle(keys);
+		ioExecutor.execute(() -> {
+			boolean first = true;
+			for (ContactId c : keys) {
 				if (!isRunning() || !shouldAllowContactConnections()) return;
 				if (!connectionLimiter.canOpenContactConnection()) return;
+				TransportProperties p = contacts.get(c);
+				String address = p.get(PROP_ADDRESS);
+				if (StringUtils.isNullOrEmpty(address)) continue;
+				String uuid = p.get(PROP_UUID);
+				if (StringUtils.isNullOrEmpty(uuid)) continue;
+				// Pause between connection attempts
+				if (first) {
+					first = false;
+				} else {
+					try {
+						Thread.sleep(POLLING_PAUSE_MS);
+					} catch (InterruptedException ex) {
+						LOG.info("Interrupted while polling");
+						Thread.currentThread().interrupt();
+						return;
+					}
+				}
 				DuplexTransportConnection conn = connect(address, uuid);
 				if (conn != null) {
 					backoff.reset();
 					if (connectionLimiter.contactConnectionOpened(conn))
 						callback.outgoingConnectionCreated(c, conn);
 				}
-			});
-		}
+			}
+		});
 	}
 
 	@Nullable
@@ -308,10 +327,9 @@ abstract class BluetoothPlugin<SS> implements DuplexPlugin, EventListener {
 	}
 
 	@Override
-	public DuplexTransportConnection createConnection(ContactId c) {
+	public DuplexTransportConnection createConnection(TransportProperties p) {
 		if (!isRunning() || !shouldAllowContactConnections()) return null;
 		if (!connectionLimiter.canOpenContactConnection()) return null;
-		TransportProperties p = callback.getRemoteProperties(c);
 		String address = p.get(PROP_ADDRESS);
 		if (StringUtils.isNullOrEmpty(address)) return null;
 		String uuid = p.get(PROP_UUID);

bramble-core/src/main/java/org/briarproject/bramble/plugin/file/FilePlugin.java

@@ -1,27 +1,21 @@
 package org.briarproject.bramble.plugin.file;
 
-import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.TransportConnectionReader;
 import org.briarproject.bramble.api.plugin.TransportConnectionWriter;
 import org.briarproject.bramble.api.plugin.simplex.SimplexPlugin;
 import org.briarproject.bramble.api.plugin.simplex.SimplexPluginCallback;
+import org.briarproject.bramble.api.properties.TransportProperties;
 
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
-import java.io.OutputStream;
-import java.util.Collection;
-import java.util.Locale;
-import java.util.concurrent.Executor;
-import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.logging.Logger;
 
-import javax.annotation.Nullable;
-
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.api.transport.TransportConstants.MIN_STREAM_LENGTH;
+import static org.briarproject.bramble.api.plugin.FileConstants.PROP_PATH;
+import static org.briarproject.bramble.util.StringUtils.isNullOrEmpty;
 
 @NotNullByDefault
 abstract class FilePlugin implements SimplexPlugin {
@@ -29,25 +23,15 @@ abstract class FilePlugin implements SimplexPlugin {
 	private static final Logger LOG =
 			Logger.getLogger(FilePlugin.class.getName());
 
-	protected final Executor ioExecutor;
 	protected final SimplexPluginCallback callback;
 	protected final int maxLatency;
-	protected final AtomicBoolean used = new AtomicBoolean(false);
 
-	protected volatile boolean running = false;
+	protected abstract void writerFinished(File f, boolean exception);
 
-	@Nullable
-	protected abstract File chooseOutputDirectory();
+	protected abstract void readerFinished(File f, boolean exception,
+			boolean recognised);
 
-	protected abstract Collection<File> findFilesByName(String filename);
-
-	protected abstract void writerFinished(File f);
-
-	protected abstract void readerFinished(File f);
-
-	protected FilePlugin(Executor ioExecutor, SimplexPluginCallback callback,
-			int maxLatency) {
-		this.ioExecutor = ioExecutor;
+	FilePlugin(SimplexPluginCallback callback, int maxLatency) {
 		this.callback = callback;
 		this.maxLatency = maxLatency;
 	}
@@ -58,81 +42,36 @@ abstract class FilePlugin implements SimplexPlugin {
 	}
 
 	@Override
-	public int getMaxIdleTime() {
-		return Integer.MAX_VALUE; // We don't need keepalives
-	}
-
-	@Override
-	public boolean isRunning() {
-		return running;
-	}
-
-	@Override
-	public TransportConnectionReader createReader(ContactId c) {
-		return null;
-	}
-
-	@Override
-	public TransportConnectionWriter createWriter(ContactId c) {
-		if (!running) return null;
-		return createWriter(createConnectionFilename());
-	}
-
-	private String createConnectionFilename() {
-		StringBuilder s = new StringBuilder(12);
-		for (int i = 0; i < 8; i++) s.append((char) ('a' + Math.random() * 26));
-		s.append(".dat");
-		return s.toString();
-	}
-
-	// Package access for testing
-	boolean isPossibleConnectionFilename(String filename) {
-		return filename.toLowerCase(Locale.US).matches("[a-z]{8}\\.dat");
-	}
-
-	@Nullable
-	private TransportConnectionWriter createWriter(String filename) {
-		if (!running) return null;
-		File dir = chooseOutputDirectory();
-		if (dir == null || !dir.exists() || !dir.isDirectory()) return null;
-		File f = new File(dir, filename);
+	public TransportConnectionReader createReader(TransportProperties p) {
+		if (!isRunning()) return null;
+		String path = p.get(PROP_PATH);
+		if (isNullOrEmpty(path)) return null;
 		try {
-			long capacity = dir.getFreeSpace();
-			if (capacity < MIN_STREAM_LENGTH) return null;
-			OutputStream out = new FileOutputStream(f);
-			return new FileTransportWriter(f, out, capacity, this);
+			File file = new File(path);
+			FileInputStream in = new FileInputStream(file);
+			return new FileTransportReader(file, in, this);
 		} catch (IOException e) {
 			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
-			f.delete();
 			return null;
 		}
 	}
 
-	protected void createReaderFromFile(File f) {
-		if (!running) return;
-		ioExecutor.execute(new ReaderCreator(f));
-	}
-
-	private class ReaderCreator implements Runnable {
-
-		private final File file;
-
-		private ReaderCreator(File file) {
-			this.file = file;
-		}
-
-		@Override
-		public void run() {
-			if (isPossibleConnectionFilename(file.getName())) {
-				try {
-					FileInputStream in = new FileInputStream(file);
-					callback.readerCreated(new FileTransportReader(file, in,
-							FilePlugin.this));
-				} catch (IOException e) {
-					if (LOG.isLoggable(WARNING))
-						LOG.log(WARNING, e.toString(), e);
-				}
+	@Override
+	public TransportConnectionWriter createWriter(TransportProperties p) {
+		if (!isRunning()) return null;
+		String path = p.get(PROP_PATH);
+		if (isNullOrEmpty(path)) return null;
+		try {
+			File file = new File(path);
+			if (!file.exists() && !file.createNewFile()) {
+				LOG.info("Failed to create file");
+				return null;
 			}
+			FileOutputStream out = new FileOutputStream(file);
+			return new FileTransportWriter(file, out, this);
+		} catch (IOException e) {
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+			return null;
 		}
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/plugin/file/FileTransportReader.java

@@ -38,9 +38,6 @@ class FileTransportReader implements TransportConnectionReader {
 		} catch (IOException e) {
 			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
-		if (recognised) {
-			file.delete();
-			plugin.readerFinished(file);
-		}
+		plugin.readerFinished(file, exception, recognised);
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/plugin/file/FileTransportWriter.java

@@ -18,14 +18,11 @@ class FileTransportWriter implements TransportConnectionWriter {
 
 	private final File file;
 	private final OutputStream out;
-	private final long capacity;
 	private final FilePlugin plugin;
 
-	FileTransportWriter(File file, OutputStream out, long capacity,
-			FilePlugin plugin) {
+	FileTransportWriter(File file, OutputStream out, FilePlugin plugin) {
 		this.file = file;
 		this.out = out;
-		this.capacity = capacity;
 		this.plugin = plugin;
 	}
 
@@ -39,11 +36,6 @@ class FileTransportWriter implements TransportConnectionWriter {
 		return plugin.getMaxIdleTime();
 	}
 
-	@Override
-	public long getCapacity() {
-		return capacity;
-	}
-
 	@Override
 	public OutputStream getOutputStream() {
 		return out;
@@ -56,7 +48,6 @@ class FileTransportWriter implements TransportConnectionWriter {
 		} catch (IOException e) {
 			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
-		if (exception) file.delete();
-		else plugin.writerFinished(file);
+		plugin.writerFinished(file, exception);
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/plugin/tcp/TcpPlugin.java

@@ -207,20 +207,16 @@ abstract class TcpPlugin implements DuplexPlugin {
 	}
 
 	@Override
-	public void poll(Collection<ContactId> connected) {
+	public void poll(Map<ContactId, TransportProperties> contacts) {
 		if (!isRunning()) return;
 		backoff.increment();
-		Map<ContactId, TransportProperties> remote =
-				callback.getRemoteProperties();
-		for (Entry<ContactId, TransportProperties> e : remote.entrySet()) {
-			ContactId c = e.getKey();
-			if (!connected.contains(c)) connectAndCallBack(c, e.getValue());
+		for (Entry<ContactId, TransportProperties> e : contacts.entrySet()) {
+			connectAndCallBack(e.getKey(), e.getValue());
 		}
 	}
 
 	private void connectAndCallBack(ContactId c, TransportProperties p) {
 		ioExecutor.execute(() -> {
-			if (!isRunning()) return;
 			DuplexTransportConnection d = createConnection(p);
 			if (d != null) {
 				backoff.reset();
@@ -230,13 +226,8 @@ abstract class TcpPlugin implements DuplexPlugin {
 	}
 
 	@Override
-	public DuplexTransportConnection createConnection(ContactId c) {
+	public DuplexTransportConnection createConnection(TransportProperties p) {
 		if (!isRunning()) return null;
-		return createConnection(callback.getRemoteProperties(c));
-	}
-
-	@Nullable
-	private DuplexTransportConnection createConnection(TransportProperties p) {
 		for (InetSocketAddress remote : getRemoteSocketAddresses(p)) {
 			if (!isConnectable(remote)) {
 				if (LOG.isLoggable(INFO)) {

bramble-core/src/test/java/org/briarproject/bramble/plugin/PluginManagerImplTest.java

@@ -2,6 +2,7 @@ package org.briarproject.bramble.plugin;
 
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.plugin.ConnectionManager;
+import org.briarproject.bramble.api.plugin.ConnectionRegistry;
 import org.briarproject.bramble.api.plugin.PluginConfig;
 import org.briarproject.bramble.api.plugin.PluginException;
 import org.briarproject.bramble.api.plugin.TransportId;
@@ -13,16 +14,18 @@ import org.briarproject.bramble.api.plugin.simplex.SimplexPluginCallback;
 import org.briarproject.bramble.api.plugin.simplex.SimplexPluginFactory;
 import org.briarproject.bramble.api.properties.TransportPropertyManager;
 import org.briarproject.bramble.api.settings.SettingsManager;
-import org.briarproject.bramble.api.ui.UiCallback;
+import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.test.BrambleTestCase;
 import org.jmock.Expectations;
 import org.jmock.Mockery;
 import org.jmock.lib.concurrent.Synchroniser;
 import org.junit.Test;
 
+import java.security.SecureRandom;
 import java.util.Arrays;
 import java.util.concurrent.Executor;
 import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
 
 import static org.briarproject.bramble.test.TestUtils.getTransportId;
 
@@ -34,15 +37,20 @@ public class PluginManagerImplTest extends BrambleTestCase {
 			setThreadingPolicy(new Synchroniser());
 		}};
 		Executor ioExecutor = Executors.newSingleThreadExecutor();
+		ScheduledExecutorService scheduler =
+				context.mock(ScheduledExecutorService.class);
+		SecureRandom random = new SecureRandom();
+		Clock clock = context.mock(Clock.class);
 		EventBus eventBus = context.mock(EventBus.class);
 		PluginConfig pluginConfig = context.mock(PluginConfig.class);
 		ConnectionManager connectionManager =
 				context.mock(ConnectionManager.class);
+		ConnectionRegistry connectionRegistry =
+				context.mock(ConnectionRegistry.class);
 		SettingsManager settingsManager =
 				context.mock(SettingsManager.class);
 		TransportPropertyManager transportPropertyManager =
 				context.mock(TransportPropertyManager.class);
-		UiCallback uiCallback = context.mock(UiCallback.class);
 
 		// Two simplex plugin factories: both create plugins, one fails to start
 		SimplexPluginFactory simplexFactory =
@@ -71,6 +79,8 @@ public class PluginManagerImplTest extends BrambleTestCase {
 			will(returnValue(simplexFailId));
 			allowing(duplexPlugin).getId();
 			will(returnValue(duplexId));
+			allowing(pluginConfig).shouldPoll();
+			will(returnValue(false));
 			// start()
 			// First simplex plugin
 			oneOf(pluginConfig).getSimplexFactories();
@@ -112,9 +122,9 @@ public class PluginManagerImplTest extends BrambleTestCase {
 			oneOf(duplexPlugin).stop();
 		}});
 
-		PluginManagerImpl p = new PluginManagerImpl(ioExecutor, eventBus,
-				pluginConfig, connectionManager, settingsManager,
-				transportPropertyManager, uiCallback);
+		PluginManagerImpl p = new PluginManagerImpl(ioExecutor, scheduler,
+				eventBus, pluginConfig, connectionManager, connectionRegistry,
+				settingsManager, transportPropertyManager, random, clock);
 
 		// Two plugins should be started and stopped
 		p.startService();

bramble-core/src/test/java/org/briarproject/bramble/plugin/PollerTest.java

@@ -15,6 +15,8 @@ import org.briarproject.bramble.api.plugin.event.ConnectionOpenedEvent;
 import org.briarproject.bramble.api.plugin.event.TransportDisabledEvent;
 import org.briarproject.bramble.api.plugin.event.TransportEnabledEvent;
 import org.briarproject.bramble.api.plugin.simplex.SimplexPlugin;
+import org.briarproject.bramble.api.properties.TransportProperties;
+import org.briarproject.bramble.api.properties.TransportPropertyManager;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.test.BrambleMockTestCase;
 import org.briarproject.bramble.test.ImmediateExecutor;
@@ -24,13 +26,15 @@ import org.jmock.lib.legacy.ClassImposteriser;
 import org.junit.Test;
 
 import java.security.SecureRandom;
-import java.util.Arrays;
-import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.Executor;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.ScheduledFuture;
 
+import static java.util.Arrays.asList;
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+import static java.util.Collections.singletonMap;
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
 import static org.briarproject.bramble.test.TestUtils.getTransportId;
 
@@ -44,6 +48,8 @@ public class PollerTest extends BrambleMockTestCase {
 			context.mock(ConnectionRegistry.class);
 	private final PluginManager pluginManager =
 			context.mock(PluginManager.class);
+	private final TransportPropertyManager transportPropertyManager =
+			context.mock(TransportPropertyManager.class);
 	private final Clock clock = context.mock(Clock.class);
 	private final ScheduledFuture future = context.mock(ScheduledFuture.class);
 	private final SecureRandom random;
@@ -51,6 +57,7 @@ public class PollerTest extends BrambleMockTestCase {
 	private final Executor ioExecutor = new ImmediateExecutor();
 	private final TransportId transportId = getTransportId();
 	private final ContactId contactId = new ContactId(234);
+	private final TransportProperties properties = new TransportProperties();
 	private final int pollingInterval = 60 * 1000;
 	private final long now = System.currentTimeMillis();
 
@@ -66,8 +73,8 @@ public class PollerTest extends BrambleMockTestCase {
 		SimplexPlugin simplexPlugin1 =
 				context.mock(SimplexPlugin.class, "simplexPlugin1");
 		TransportId simplexId1 = getTransportId();
-		List<SimplexPlugin> simplexPlugins = Arrays.asList(simplexPlugin,
-				simplexPlugin1);
+		List<SimplexPlugin> simplexPlugins =
+				asList(simplexPlugin, simplexPlugin1);
 		TransportConnectionWriter simplexWriter =
 				context.mock(TransportConnectionWriter.class);
 
@@ -76,8 +83,8 @@ public class PollerTest extends BrambleMockTestCase {
 		TransportId duplexId = getTransportId();
 		DuplexPlugin duplexPlugin1 =
 				context.mock(DuplexPlugin.class, "duplexPlugin1");
-		List<DuplexPlugin> duplexPlugins = Arrays.asList(duplexPlugin,
-				duplexPlugin1);
+		List<DuplexPlugin> duplexPlugins =
+				asList(duplexPlugin, duplexPlugin1);
 		DuplexTransportConnection duplexConnection =
 				context.mock(DuplexTransportConnection.class);
 
@@ -96,8 +103,12 @@ public class PollerTest extends BrambleMockTestCase {
 			will(returnValue(simplexId1));
 			oneOf(connectionRegistry).isConnected(contactId, simplexId1);
 			will(returnValue(false));
+			// Get the transport properties
+			oneOf(transportPropertyManager).getRemoteProperties(contactId,
+					simplexId1);
+			will(returnValue(properties));
 			// Connect to the contact
-			oneOf(simplexPlugin1).createWriter(contactId);
+			oneOf(simplexPlugin1).createWriter(properties);
 			will(returnValue(simplexWriter));
 			// Pass the connection to the connection manager
 			oneOf(connectionManager).manageOutgoingConnection(contactId,
@@ -105,7 +116,7 @@ public class PollerTest extends BrambleMockTestCase {
 			// Get the duplex plugins
 			oneOf(pluginManager).getDuplexPlugins();
 			will(returnValue(duplexPlugins));
-			// The first plugin supports polling
+			// The duplex plugin supports polling
 			oneOf(duplexPlugin).shouldPoll();
 			will(returnValue(true));
 			// Check whether the contact is already connected
@@ -113,8 +124,12 @@ public class PollerTest extends BrambleMockTestCase {
 			will(returnValue(duplexId));
 			oneOf(connectionRegistry).isConnected(contactId, duplexId);
 			will(returnValue(false));
+			// Get the transport properties
+			oneOf(transportPropertyManager).getRemoteProperties(contactId,
+					duplexId);
+			will(returnValue(properties));
 			// Connect to the contact
-			oneOf(duplexPlugin).createConnection(contactId);
+			oneOf(duplexPlugin).createConnection(properties);
 			will(returnValue(duplexConnection));
 			// Pass the connection to the connection manager
 			oneOf(connectionManager).manageOutgoingConnection(contactId,
@@ -125,7 +140,8 @@ public class PollerTest extends BrambleMockTestCase {
 		}});
 
 		Poller p = new Poller(ioExecutor, scheduler, connectionManager,
-				connectionRegistry, pluginManager, random, clock);
+				connectionRegistry, pluginManager, transportPropertyManager,
+				random, clock);
 
 		p.eventOccurred(new ContactStatusChangedEvent(contactId, true));
 	}
@@ -165,8 +181,12 @@ public class PollerTest extends BrambleMockTestCase {
 			// Check whether the contact is already connected
 			oneOf(connectionRegistry).isConnected(contactId, transportId);
 			will(returnValue(false));
+			// Get the transport properties
+			oneOf(transportPropertyManager).getRemoteProperties(contactId,
+					transportId);
+			will(returnValue(properties));
 			// Connect to the contact
-			oneOf(plugin).createConnection(contactId);
+			oneOf(plugin).createConnection(properties);
 			will(returnValue(duplexConnection));
 			// Pass the connection to the connection manager
 			oneOf(connectionManager).manageOutgoingConnection(contactId,
@@ -174,15 +194,15 @@ public class PollerTest extends BrambleMockTestCase {
 		}});
 
 		Poller p = new Poller(ioExecutor, scheduler, connectionManager,
-				connectionRegistry, pluginManager, random, clock);
+				connectionRegistry, pluginManager, transportPropertyManager,
+				random, clock);
 
 		p.eventOccurred(new ConnectionClosedEvent(contactId, transportId,
 				false));
 	}
 
-
 	@Test
-	public void testRescheduleOnConnectionOpened() throws Exception {
+	public void testRescheduleOnConnectionOpened() {
 		Plugin plugin = context.mock(Plugin.class);
 
 		context.checking(new Expectations() {{
@@ -205,14 +225,15 @@ public class PollerTest extends BrambleMockTestCase {
 		}});
 
 		Poller p = new Poller(ioExecutor, scheduler, connectionManager,
-				connectionRegistry, pluginManager, random, clock);
+				connectionRegistry, pluginManager, transportPropertyManager,
+				random, clock);
 
 		p.eventOccurred(new ConnectionOpenedEvent(contactId, transportId,
 				false));
 	}
 
 	@Test
-	public void testRescheduleDoesNotReplaceEarlierTask() throws Exception {
+	public void testRescheduleDoesNotReplaceEarlierTask() {
 		Plugin plugin = context.mock(Plugin.class);
 
 		context.checking(new Expectations() {{
@@ -248,7 +269,8 @@ public class PollerTest extends BrambleMockTestCase {
 		}});
 
 		Poller p = new Poller(ioExecutor, scheduler, connectionManager,
-				connectionRegistry, pluginManager, random, clock);
+				connectionRegistry, pluginManager, transportPropertyManager,
+				random, clock);
 
 		p.eventOccurred(new ConnectionOpenedEvent(contactId, transportId,
 				false));
@@ -257,7 +279,7 @@ public class PollerTest extends BrambleMockTestCase {
 	}
 
 	@Test
-	public void testRescheduleReplacesLaterTask() throws Exception {
+	public void testRescheduleReplacesLaterTask() {
 		Plugin plugin = context.mock(Plugin.class);
 
 		context.checking(new Expectations() {{
@@ -296,7 +318,8 @@ public class PollerTest extends BrambleMockTestCase {
 		}});
 
 		Poller p = new Poller(ioExecutor, scheduler, connectionManager,
-				connectionRegistry, pluginManager, random, clock);
+				connectionRegistry, pluginManager, transportPropertyManager,
+				random, clock);
 
 		p.eventOccurred(new ConnectionOpenedEvent(contactId, transportId,
 				false));
@@ -306,8 +329,7 @@ public class PollerTest extends BrambleMockTestCase {
 
 	@Test
 	public void testPollsOnTransportEnabled() throws Exception {
-		Plugin plugin = context.mock(Plugin.class);
-		List<ContactId> connected = Collections.singletonList(contactId);
+		DuplexPlugin plugin = context.mock(DuplexPlugin.class);
 
 		context.checking(new Expectations() {{
 			allowing(plugin).getId();
@@ -335,20 +357,69 @@ public class PollerTest extends BrambleMockTestCase {
 			oneOf(scheduler).schedule(with(any(Runnable.class)),
 					with((long) (pollingInterval * 0.5)), with(MILLISECONDS));
 			will(returnValue(future));
-			// Poll the plugin
+			// Get the transport properties and connected contacts
+			oneOf(transportPropertyManager).getRemoteProperties(transportId);
+			will(returnValue(singletonMap(contactId, properties)));
 			oneOf(connectionRegistry).getConnectedContacts(transportId);
-			will(returnValue(connected));
-			oneOf(plugin).poll(connected);
+			will(returnValue(emptyList()));
+			// Poll the plugin
+			oneOf(plugin).poll(singletonMap(contactId, properties));
 		}});
 
 		Poller p = new Poller(ioExecutor, scheduler, connectionManager,
-				connectionRegistry, pluginManager, random, clock);
+				connectionRegistry, pluginManager, transportPropertyManager,
+				random, clock);
 
 		p.eventOccurred(new TransportEnabledEvent(transportId));
 	}
 
 	@Test
-	public void testCancelsPollingOnTransportDisabled() throws Exception {
+	public void testDoesNotPollIfAllContactsAreConnected() throws Exception {
+		DuplexPlugin plugin = context.mock(DuplexPlugin.class);
+
+		context.checking(new Expectations() {{
+			allowing(plugin).getId();
+			will(returnValue(transportId));
+			// Get the plugin
+			oneOf(pluginManager).getPlugin(transportId);
+			will(returnValue(plugin));
+			// The plugin supports polling
+			oneOf(plugin).shouldPoll();
+			will(returnValue(true));
+			// Schedule a polling task immediately
+			oneOf(clock).currentTimeMillis();
+			will(returnValue(now));
+			oneOf(scheduler).schedule(with(any(Runnable.class)), with(0L),
+					with(MILLISECONDS));
+			will(returnValue(future));
+			will(new RunAction());
+			// Running the polling task schedules the next polling task
+			oneOf(plugin).getPollingInterval();
+			will(returnValue(pollingInterval));
+			oneOf(random).nextDouble();
+			will(returnValue(0.5));
+			oneOf(clock).currentTimeMillis();
+			will(returnValue(now));
+			oneOf(scheduler).schedule(with(any(Runnable.class)),
+					with((long) (pollingInterval * 0.5)), with(MILLISECONDS));
+			will(returnValue(future));
+			// Get the transport properties and connected contacts
+			oneOf(transportPropertyManager).getRemoteProperties(transportId);
+			will(returnValue(singletonMap(contactId, properties)));
+			oneOf(connectionRegistry).getConnectedContacts(transportId);
+			will(returnValue(singletonList(contactId)));
+			// All contacts are connected, so don't poll the plugin
+		}});
+
+		Poller p = new Poller(ioExecutor, scheduler, connectionManager,
+				connectionRegistry, pluginManager, transportPropertyManager,
+				random, clock);
+
+		p.eventOccurred(new TransportEnabledEvent(transportId));
+	}
+
+	@Test
+	public void testCancelsPollingOnTransportDisabled() {
 		Plugin plugin = context.mock(Plugin.class);
 
 		context.checking(new Expectations() {{
@@ -371,7 +442,8 @@ public class PollerTest extends BrambleMockTestCase {
 		}});
 
 		Poller p = new Poller(ioExecutor, scheduler, connectionManager,
-				connectionRegistry, pluginManager, random, clock);
+				connectionRegistry, pluginManager, transportPropertyManager,
+				random, clock);
 
 		p.eventOccurred(new TransportEnabledEvent(transportId));
 		p.eventOccurred(new TransportDisabledEvent(transportId));

bramble-core/src/test/java/org/briarproject/bramble/plugin/tcp/LanTcpPluginTest.java

@@ -23,8 +23,6 @@ import java.net.ServerSocket;
 import java.net.Socket;
 import java.util.Collections;
 import java.util.Comparator;
-import java.util.Hashtable;
-import java.util.Map;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.Executor;
 import java.util.concurrent.Executors;
@@ -40,7 +38,6 @@ import static org.junit.Assert.assertTrue;
 
 public class LanTcpPluginTest extends BrambleTestCase {
 
-	private final ContactId contactId = new ContactId(234);
 	private final Backoff backoff = new TestBackoff();
 
 	@Test
@@ -160,12 +157,10 @@ public class LanTcpPluginTest extends BrambleTestCase {
 				error.set(true);
 			}
 		}).start();
-		// Tell the plugin about the port
+		// Connect to the port
 		TransportProperties p = new TransportProperties();
 		p.put("ipPorts", addrString + ":" + port);
-		callback.remote.put(contactId, p);
-		// Connect to the port
-		DuplexTransportConnection d = plugin.createConnection(contactId);
+		DuplexTransportConnection d = plugin.createConnection(p);
 		assertNotNull(d);
 		// Check that the connection was accepted
 		assertTrue(latch.await(5, SECONDS));
@@ -281,7 +276,7 @@ public class LanTcpPluginTest extends BrambleTestCase {
 	}
 
 	@Test
-	public void testComparatorPrefersNonZeroPorts() throws Exception {
+	public void testComparatorPrefersNonZeroPorts() {
 		Comparator<InetSocketAddress> comparator = new LanAddressComparator();
 		InetSocketAddress nonZero = new InetSocketAddress("1.2.3.4", 1234);
 		InetSocketAddress zero = new InetSocketAddress("1.2.3.4", 0);
@@ -294,7 +289,7 @@ public class LanTcpPluginTest extends BrambleTestCase {
 	}
 
 	@Test
-	public void testComparatorPrefersLongerPrefixes() throws Exception {
+	public void testComparatorPrefersLongerPrefixes() {
 		Comparator<InetSocketAddress> comparator = new LanAddressComparator();
 		InetSocketAddress prefix192 = new InetSocketAddress("192.168.0.1", 0);
 		InetSocketAddress prefix172 = new InetSocketAddress("172.16.0.1", 0);
@@ -314,7 +309,7 @@ public class LanTcpPluginTest extends BrambleTestCase {
 	}
 
 	@Test
-	public void testComparatorPrefersSiteLocalToLinkLocal() throws Exception {
+	public void testComparatorPrefersSiteLocalToLinkLocal() {
 		Comparator<InetSocketAddress> comparator = new LanAddressComparator();
 		InetSocketAddress prefix192 = new InetSocketAddress("192.168.0.1", 0);
 		InetSocketAddress prefix172 = new InetSocketAddress("172.16.0.1", 0);
@@ -345,8 +340,6 @@ public class LanTcpPluginTest extends BrambleTestCase {
 	@NotNullByDefault
 	private static class Callback implements DuplexPluginCallback {
 
-		private final Map<ContactId, TransportProperties> remote =
-				new Hashtable<>();
 		private final CountDownLatch propertiesLatch = new CountDownLatch(1);
 		private final CountDownLatch connectionsLatch = new CountDownLatch(1);
 		private final TransportProperties local = new TransportProperties();
@@ -361,16 +354,6 @@ public class LanTcpPluginTest extends BrambleTestCase {
 			return local;
 		}
 
-		@Override
-		public Map<ContactId, TransportProperties> getRemoteProperties() {
-			return remote;
-		}
-
-		@Override
-		public TransportProperties getRemoteProperties(ContactId c) {
-			return remote.get(c);
-		}
-
 		@Override
 		public void mergeSettings(Settings s) {
 		}
@@ -381,20 +364,6 @@ public class LanTcpPluginTest extends BrambleTestCase {
 			propertiesLatch.countDown();
 		}
 
-		@Override
-		public int showChoice(String[] options, String... message) {
-			return -1;
-		}
-
-		@Override
-		public boolean showConfirmationMessage(String... message) {
-			return false;
-		}
-
-		@Override
-		public void showMessage(String... message) {
-		}
-
 		@Override
 		public void incomingConnectionCreated(DuplexTransportConnection d) {
 			connectionsLatch.countDown();

bramble-core/src/test/java/org/briarproject/bramble/test/CaptureArgumentAction.java

@@ -20,7 +20,7 @@ public class CaptureArgumentAction<T> implements Action {
 	}
 
 	@Override
-	public Object invoke(Invocation invocation) throws Throwable {
+	public Object invoke(Invocation invocation) {
 		captured.set(capturedClass.cast(invocation.getParameter(index)));
 		return null;
 	}

bramble-core/src/test/java/org/briarproject/bramble/test/TestPluginConfigModule.java

@@ -9,13 +9,14 @@ import org.briarproject.bramble.api.plugin.simplex.SimplexPluginCallback;
 import org.briarproject.bramble.api.plugin.simplex.SimplexPluginFactory;
 
 import java.util.Collection;
-import java.util.Collections;
 
 import javax.annotation.Nullable;
 
 import dagger.Module;
 import dagger.Provides;
 
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
 import static org.briarproject.bramble.test.TestUtils.getTransportId;
 
 @Module
@@ -51,12 +52,17 @@ public class TestPluginConfigModule {
 
 			@Override
 			public Collection<DuplexPluginFactory> getDuplexFactories() {
-				return Collections.emptyList();
+				return emptyList();
 			}
 
 			@Override
 			public Collection<SimplexPluginFactory> getSimplexFactories() {
-				return Collections.singletonList(simplex);
+				return singletonList(simplex);
+			}
+
+			@Override
+			public boolean shouldPoll() {
+				return false;
 			}
 		};
 		return pluginConfig;

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/DesktopPluginModule.java

@@ -10,20 +10,20 @@ import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory;
 import org.briarproject.bramble.api.plugin.simplex.SimplexPluginFactory;
 import org.briarproject.bramble.api.reliability.ReliabilityLayerFactory;
 import org.briarproject.bramble.plugin.bluetooth.JavaBluetoothPluginFactory;
-import org.briarproject.bramble.plugin.file.RemovableDrivePluginFactory;
 import org.briarproject.bramble.plugin.modem.ModemPluginFactory;
 import org.briarproject.bramble.plugin.tcp.LanTcpPluginFactory;
 import org.briarproject.bramble.plugin.tcp.WanTcpPluginFactory;
 
 import java.security.SecureRandom;
-import java.util.Arrays;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.concurrent.Executor;
 
 import dagger.Module;
 import dagger.Provides;
 
+import static java.util.Arrays.asList;
+import static java.util.Collections.emptyList;
+
 @Module
 public class DesktopPluginModule extends PluginModule {
 
@@ -41,12 +41,8 @@ public class DesktopPluginModule extends PluginModule {
 				backoffFactory);
 		DuplexPluginFactory wan = new WanTcpPluginFactory(ioExecutor,
 				backoffFactory, shutdownManager);
-		SimplexPluginFactory removable =
-				new RemovableDrivePluginFactory(ioExecutor);
-		Collection<SimplexPluginFactory> simplex =
-				Collections.singletonList(removable);
 		Collection<DuplexPluginFactory> duplex =
-				Arrays.asList(bluetooth, modem, lan, wan);
+				asList(bluetooth, modem, lan, wan);
 		@NotNullByDefault
 		PluginConfig pluginConfig = new PluginConfig() {
 
@@ -57,7 +53,12 @@ public class DesktopPluginModule extends PluginModule {
 
 			@Override
 			public Collection<SimplexPluginFactory> getSimplexFactories() {
-				return simplex;
+				return emptyList();
+			}
+
+			@Override
+			public boolean shouldPoll() {
+				return true;
 			}
 		};
 		return pluginConfig;

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/file/LinuxRemovableDriveFinder.java

@@ -1,28 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import javax.annotation.Nullable;
-
-@NotNullByDefault
-class LinuxRemovableDriveFinder extends UnixRemovableDriveFinder {
-
-	@Override
-	protected String getMountCommand() {
-		return "/bin/mount";
-	}
-
-	@Override
-	@Nullable
-	protected String parseMountPoint(String line) {
-		// The format is "/dev/foo on /bar/baz type bam (opt1,opt2)"
-		String pattern = "^/dev/[^ ]+ on (.*) type [^ ]+ \\([^)]+\\)$";
-		String path = line.replaceFirst(pattern, "$1");
-		return path.equals(line) ? null : path;
-	}
-
-	@Override
-	protected boolean isRemovableDriveMountPoint(String path) {
-		return path.startsWith("/mnt/") || path.startsWith("/media/");
-	}
-}

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/file/LinuxRemovableDriveMonitor.java

@@ -1,12 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-@NotNullByDefault
-class LinuxRemovableDriveMonitor extends UnixRemovableDriveMonitor {
-
-	@Override
-	protected String[] getPathsToWatch() {
-		return new String[] {"/mnt", "/media"};
-	}
-}

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/file/MacRemovableDriveFinder.java

@@ -1,28 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import javax.annotation.Nullable;
-
-@NotNullByDefault
-class MacRemovableDriveFinder extends UnixRemovableDriveFinder {
-
-	@Override
-	protected String getMountCommand() {
-		return "/sbin/mount";
-	}
-
-	@Override
-	@Nullable
-	protected String parseMountPoint(String line) {
-		// The format is "/dev/foo on /bar/baz (opt1, opt2)"
-		String pattern = "^/dev/[^ ]+ on (.*) \\([^)]+\\)$";
-		String path = line.replaceFirst(pattern, "$1");
-		return path.equals(line) ? null : path;
-	}
-
-	@Override
-	protected boolean isRemovableDriveMountPoint(String path) {
-		return path.startsWith("/Volumes/");
-	}
-}

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/file/MacRemovableDriveMonitor.java

@@ -1,12 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-@NotNullByDefault
-class MacRemovableDriveMonitor extends UnixRemovableDriveMonitor {
-
-	@Override
-	protected String[] getPathsToWatch() {
-		return new String[] {"/Volumes"};
-	}
-}

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/file/PollingRemovableDriveMonitor.java

@@ -1,84 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
-import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
-
-import java.io.File;
-import java.io.IOException;
-import java.util.Collection;
-import java.util.concurrent.Executor;
-import java.util.concurrent.locks.Condition;
-import java.util.concurrent.locks.Lock;
-import java.util.concurrent.locks.ReentrantLock;
-import java.util.logging.Logger;
-
-import static java.util.concurrent.TimeUnit.MILLISECONDS;
-
-@MethodsNotNullByDefault
-@ParametersNotNullByDefault
-class PollingRemovableDriveMonitor implements RemovableDriveMonitor, Runnable {
-
-	private static final Logger LOG =
-			Logger.getLogger(PollingRemovableDriveMonitor.class.getName());
-
-	private final Executor ioExecutor;
-	private final RemovableDriveFinder finder;
-	private final int pollingInterval;
-
-	private final Lock pollingLock = new ReentrantLock();
-	private final Condition stopPolling = pollingLock.newCondition();
-
-	private volatile boolean running = false;
-	private volatile Callback callback = null;
-
-	PollingRemovableDriveMonitor(Executor ioExecutor,
-			RemovableDriveFinder finder, int pollingInterval) {
-		this.ioExecutor = ioExecutor;
-		this.finder = finder;
-		this.pollingInterval = pollingInterval;
-	}
-
-	@Override
-	public void start(Callback callback) throws IOException {
-		this.callback = callback;
-		running = true;
-		ioExecutor.execute(this);
-	}
-
-	@Override
-	public void stop() throws IOException {
-		running = false;
-		pollingLock.lock();
-		try {
-			stopPolling.signalAll();
-		} finally {
-			pollingLock.unlock();
-		}
-	}
-
-	@Override
-	public void run() {
-		try {
-			Collection<File> drives = finder.findRemovableDrives();
-			while (running) {
-				pollingLock.lock();
-				try {
-					stopPolling.await(pollingInterval, MILLISECONDS);
-				} finally {
-					pollingLock.unlock();
-				}
-				if (!running) return;
-				Collection<File> newDrives = finder.findRemovableDrives();
-				for (File f : newDrives) {
-					if (!drives.contains(f)) callback.driveInserted(f);
-				}
-				drives = newDrives;
-			}
-		} catch (InterruptedException e) {
-			LOG.warning("Interrupted while waiting to poll");
-			Thread.currentThread().interrupt();
-		} catch (IOException e) {
-			callback.exceptionThrown(e);
-		}
-	}
-}

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/file/RemovableDriveFinder.java

@@ -1,13 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import java.io.File;
-import java.io.IOException;
-import java.util.Collection;
-
-@NotNullByDefault
-interface RemovableDriveFinder {
-
-	Collection<File> findRemovableDrives() throws IOException;
-}

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/file/RemovableDriveMonitor.java

@@ -1,21 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import java.io.File;
-import java.io.IOException;
-
-@NotNullByDefault
-interface RemovableDriveMonitor {
-
-	void start(Callback c) throws IOException;
-
-	void stop() throws IOException;
-
-	interface Callback {
-
-		void driveInserted(File root);
-
-		void exceptionThrown(IOException e);
-	}
-}

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/file/RemovableDrivePlugin.java

@@ -1,140 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import org.briarproject.bramble.api.contact.ContactId;
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.plugin.PluginException;
-import org.briarproject.bramble.api.plugin.TransportId;
-import org.briarproject.bramble.api.plugin.simplex.SimplexPluginCallback;
-
-import java.io.File;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.List;
-import java.util.concurrent.Executor;
-import java.util.logging.Logger;
-
-import static java.util.logging.Level.WARNING;
-
-@NotNullByDefault
-class RemovableDrivePlugin extends FilePlugin
-		implements RemovableDriveMonitor.Callback {
-
-	static final TransportId ID =
-			new TransportId("org.briarproject.bramble.file");
-
-	private static final Logger LOG =
-			Logger.getLogger(RemovableDrivePlugin.class.getName());
-
-	private final RemovableDriveFinder finder;
-	private final RemovableDriveMonitor monitor;
-
-	RemovableDrivePlugin(Executor ioExecutor, SimplexPluginCallback callback,
-			RemovableDriveFinder finder, RemovableDriveMonitor monitor,
-			int maxLatency) {
-		super(ioExecutor, callback, maxLatency);
-		this.finder = finder;
-		this.monitor = monitor;
-	}
-
-	@Override
-	public TransportId getId() {
-		return ID;
-	}
-
-	@Override
-	public void start() throws PluginException {
-		if (used.getAndSet(true)) throw new IllegalStateException();
-		running = true;
-		try {
-			monitor.start(this);
-		} catch (IOException e) {
-			throw new PluginException(e);
-		}
-	}
-
-	@Override
-	public void stop() throws PluginException {
-		running = false;
-		try {
-			monitor.stop();
-		} catch (IOException e) {
-			throw new PluginException(e);
-		}
-	}
-
-	@Override
-	public boolean shouldPoll() {
-		return false;
-	}
-
-	@Override
-	public int getPollingInterval() {
-		throw new UnsupportedOperationException();
-	}
-
-	@Override
-	public void poll(Collection<ContactId> connected) {
-		throw new UnsupportedOperationException();
-	}
-
-	@Override
-	protected File chooseOutputDirectory() {
-		try {
-			List<File> drives = new ArrayList<>(finder.findRemovableDrives());
-			if (drives.isEmpty()) return null;
-			String[] paths = new String[drives.size()];
-			for (int i = 0; i < paths.length; i++) {
-				paths[i] = drives.get(i).getPath();
-			}
-			int i = callback.showChoice(paths, "REMOVABLE_DRIVE_CHOOSE_DRIVE");
-			if (i == -1) return null;
-			return drives.get(i);
-		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
-			return null;
-		}
-	}
-
-	@Override
-	protected void readerFinished(File f) {
-		callback.showMessage("REMOVABLE_DRIVE_READ_FINISHED");
-	}
-
-	@Override
-	protected void writerFinished(File f) {
-		callback.showMessage("REMOVABLE_DRIVE_WRITE_FINISHED");
-	}
-
-	@Override
-	protected Collection<File> findFilesByName(String filename) {
-		List<File> matches = new ArrayList<>();
-		try {
-			for (File drive : finder.findRemovableDrives()) {
-				File[] files = drive.listFiles();
-				if (files != null) {
-					for (File f : files) {
-						if (f.isFile() && filename.equals(f.getName()))
-							matches.add(f);
-					}
-				}
-			}
-		} catch (IOException e) {
-			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
-		}
-		return matches;
-	}
-
-	@Override
-	public void driveInserted(File root) {
-		File[] files = root.listFiles();
-		if (files != null) {
-			for (File f : files) if (f.isFile()) createReaderFromFile(f);
-		}
-	}
-
-	@Override
-	public void exceptionThrown(IOException e) {
-		if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
-	}
-}

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/file/RemovableDrivePluginFactory.java

@@ -1,63 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.plugin.TransportId;
-import org.briarproject.bramble.api.plugin.simplex.SimplexPlugin;
-import org.briarproject.bramble.api.plugin.simplex.SimplexPluginCallback;
-import org.briarproject.bramble.api.plugin.simplex.SimplexPluginFactory;
-import org.briarproject.bramble.util.OsUtils;
-
-import java.util.concurrent.Executor;
-
-import javax.annotation.concurrent.Immutable;
-
-@Immutable
-@NotNullByDefault
-public class RemovableDrivePluginFactory implements SimplexPluginFactory {
-
-	// Maximum latency 14 days (Royal Mail or lackadaisical carrier pigeon)
-	private static final int MAX_LATENCY = 14 * 24 * 60 * 60 * 1000;
-	private static final int POLLING_INTERVAL = 10 * 1000; // 10 seconds
-
-	private final Executor ioExecutor;
-
-	public RemovableDrivePluginFactory(Executor ioExecutor) {
-		this.ioExecutor = ioExecutor;
-	}
-
-	@Override
-	public TransportId getId() {
-		return RemovableDrivePlugin.ID;
-	}
-
-	@Override
-	public int getMaxLatency() {
-		return MAX_LATENCY;
-	}
-
-	@Override
-	public SimplexPlugin createPlugin(SimplexPluginCallback callback) {
-		RemovableDriveFinder finder;
-		RemovableDriveMonitor monitor;
-		if (OsUtils.isLinux()) {
-			finder = new LinuxRemovableDriveFinder();
-			monitor = new LinuxRemovableDriveMonitor();
-		} else if (OsUtils.isMacLeopardOrNewer()) {
-			finder = new MacRemovableDriveFinder();
-			monitor = new MacRemovableDriveMonitor();
-		} else if (OsUtils.isMac()) {
-			// JNotify requires OS X 10.5 or newer, so we have to poll
-			finder = new MacRemovableDriveFinder();
-			monitor = new PollingRemovableDriveMonitor(ioExecutor, finder,
-					POLLING_INTERVAL);
-		} else if (OsUtils.isWindows()) {
-			finder = new WindowsRemovableDriveFinder();
-			monitor = new PollingRemovableDriveMonitor(ioExecutor, finder,
-					POLLING_INTERVAL);
-		} else {
-			return null;
-		}
-		return new RemovableDrivePlugin(ioExecutor, callback, finder, monitor,
-				MAX_LATENCY);
-	}
-}

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/file/UnixRemovableDriveFinder.java

@@ -1,48 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import java.io.File;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Scanner;
-
-import javax.annotation.Nullable;
-
-@NotNullByDefault
-abstract class UnixRemovableDriveFinder implements RemovableDriveFinder {
-
-	protected abstract String getMountCommand();
-
-	@Nullable
-	protected abstract String parseMountPoint(String line);
-
-	protected abstract boolean isRemovableDriveMountPoint(String path);
-
-	@Override
-	public List<File> findRemovableDrives() throws IOException {
-		List<File> drives = new ArrayList<>();
-		Process p = new ProcessBuilder(getMountCommand()).start();
-		Scanner s = new Scanner(p.getInputStream(), "UTF-8");
-		try {
-			while (s.hasNextLine()) {
-				String line = s.nextLine();
-				String[] tokens = line.split(" ");
-				if (tokens.length < 3) continue;
-				// The general format is "/dev/foo on /bar/baz ..."
-				if (tokens[0].startsWith("/dev/") && tokens[1].equals("on")) {
-					// The path may contain spaces so we can't use tokens[2]
-					String path = parseMountPoint(line);
-					if (path != null && isRemovableDriveMountPoint(path)) {
-						File f = new File(path);
-						if (f.exists() && f.isDirectory()) drives.add(f);
-					}
-				}
-			}
-		} finally {
-			s.close();
-		}
-		return drives;
-	}
-}

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/file/UnixRemovableDriveMonitor.java

@@ -1,129 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import net.contentobjects.jnotify.JNotify;
-import net.contentobjects.jnotify.JNotifyListener;
-
-import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
-import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
-
-import java.io.File;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.concurrent.locks.Lock;
-import java.util.concurrent.locks.ReentrantLock;
-
-import javax.annotation.Nullable;
-
-@MethodsNotNullByDefault
-@ParametersNotNullByDefault
-abstract class UnixRemovableDriveMonitor implements RemovableDriveMonitor,
-JNotifyListener {
-
-	//TODO: rationalise this in a further refactor
-	private static final Lock staticLock = new ReentrantLock();
-
-	// The following are locking: staticLock
-	private static boolean triedLoad = false;
-	private static Throwable loadError = null;
-
-	private final Lock lock = new ReentrantLock();
-
-	// The following are locking: lock
-	private final List<Integer> watches = new ArrayList<>();
-	private boolean started = false;
-	private Callback callback = null;
-
-	protected abstract String[] getPathsToWatch();
-
-	@Nullable
-	private static Throwable tryLoad() {
-		try {
-			Class.forName("net.contentobjects.jnotify.JNotify");
-			return null;
-		} catch (UnsatisfiedLinkError | ClassNotFoundException e) {
-			return e;
-		}
-	}
-
-	private static void checkEnabled() throws IOException {
-		staticLock.lock();
-		try {
-			if (!triedLoad) {
-				loadError = tryLoad();
-				triedLoad = true;
-			}
-			if (loadError != null) throw new IOException(loadError.toString());
-		} finally {
-			staticLock.unlock();
-		}
-	}
-
-	@Override
-	public void start(Callback callback) throws IOException {
-		checkEnabled();
-		List<Integer> watches = new ArrayList<>();
-		int mask = JNotify.FILE_CREATED;
-		for (String path : getPathsToWatch()) {
-			if (new File(path).exists())
-				watches.add(JNotify.addWatch(path, mask, false, this));
-		}
-		lock.lock();
-		try {
-			if (started) throw new AssertionError();
-			if (this.callback != null) throw new AssertionError();
-			started = true;
-			this.callback = callback;
-			this.watches.addAll(watches);
-		} finally {
-			lock.unlock();
-		}
-	}
-
-	@Override
-	public void stop() throws IOException {
-		checkEnabled();
-		List<Integer> watches;
-		lock.lock();
-		try {
-			if (!started) throw new AssertionError();
-			if (callback == null) throw new AssertionError();
-			started = false;
-			callback = null;
-			watches = new ArrayList<>(this.watches);
-			this.watches.clear();
-		} finally {
-			lock.unlock();
-		}
-		for (Integer w : watches) JNotify.removeWatch(w);
-	}
-
-	@Override
-	public void fileCreated(int wd, String rootPath, String name) {
-		Callback callback;
-		lock.lock();
-		try {
-			callback = this.callback;
-		} finally {
-			lock.unlock();
-		}
-		if (callback != null)
-			callback.driveInserted(new File(rootPath + "/" + name));
-	}
-
-	@Override
-	public void fileDeleted(int wd, String rootPath, String name) {
-		throw new UnsupportedOperationException();
-	}
-
-	@Override
-	public void fileModified(int wd, String rootPath, String name) {
-		throw new UnsupportedOperationException();
-	}
-
-	@Override
-	public void fileRenamed(int wd, String rootPath, String oldName,
-			String newName) {
-		throw new UnsupportedOperationException();
-	}
-}

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/file/WindowsRemovableDriveFinder.java

@@ -1,34 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import com.sun.jna.platform.win32.Kernel32;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import java.io.File;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.List;
-
-@NotNullByDefault
-class WindowsRemovableDriveFinder implements RemovableDriveFinder {
-
-	// http://msdn.microsoft.com/en-us/library/windows/desktop/aa364939.aspx
-	private static final int DRIVE_REMOVABLE = 2;
-
-	@Override
-	public Collection<File> findRemovableDrives() throws IOException {
-		File[] roots = File.listRoots();
-		if (roots == null) throw new IOException();
-		List<File> drives = new ArrayList<>();
-		for (File root : roots) {
-			try {
-				int type = Kernel32.INSTANCE.GetDriveType(root.getPath());
-				if (type == DRIVE_REMOVABLE) drives.add(root);
-			} catch (RuntimeException e) {
-				throw new IOException(e);
-			}
-		}
-		return drives;
-	}
-}

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/modem/ModemPlugin.java

@@ -17,7 +17,7 @@ import org.briarproject.bramble.util.StringUtils;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.util.Collection;
+import java.util.Map;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.logging.Logger;
 
@@ -115,7 +115,7 @@ class ModemPlugin implements DuplexPlugin, Modem.Callback {
 	}
 
 	@Override
-	public void poll(Collection<ContactId> connected) {
+	public void poll(Map<ContactId, TransportProperties> contacts) {
 		throw new UnsupportedOperationException();
 	}
 
@@ -139,17 +139,16 @@ class ModemPlugin implements DuplexPlugin, Modem.Callback {
 	}
 
 	@Override
-	public DuplexTransportConnection createConnection(ContactId c) {
+	public DuplexTransportConnection createConnection(TransportProperties p) {
 		if (!running) return null;
 		// Get the ISO 3166 code for the caller's country
 		String fromIso = callback.getLocalProperties().get("iso3166");
 		if (StringUtils.isNullOrEmpty(fromIso)) return null;
 		// Get the ISO 3166 code for the callee's country
-		TransportProperties properties = callback.getRemoteProperties(c);
-		String toIso = properties.get("iso3166");
+		String toIso = p.get("iso3166");
 		if (StringUtils.isNullOrEmpty(toIso)) return null;
 		// Get the callee's phone number
-		String number = properties.get("number");
+		String number = p.get("number");
 		if (StringUtils.isNullOrEmpty(number)) return null;
 		// Convert the number into direct dialling form
 		number = CountryCodes.translate(number, fromIso, toIso);

bramble-j2se/src/test/java/org/briarproject/bramble/plugin/file/LinuxRemovableDriveFinderTest.java

@@ -1,26 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import org.briarproject.bramble.test.BrambleTestCase;
-import org.junit.Test;
-
-import static org.junit.Assert.assertEquals;
-
-public class LinuxRemovableDriveFinderTest extends BrambleTestCase {
-
-	@Test
-	public void testParseMountPoint() {
-		LinuxRemovableDriveFinder f = new LinuxRemovableDriveFinder();
-		String line = "/dev/sda3 on / type ext3"
-			+ " (rw,errors=remount-ro,commit=0)";
-		assertEquals("/", f.parseMountPoint(line));
-		line = "gvfs-fuse-daemon on /home/alice/.gvfs"
-			+ " type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=alice)";
-		assertEquals(null, f.parseMountPoint(line)); // Can't be parsed
-		line = "fusectl on /sys/fs/fuse/connections type fusectl (rw)";
-		assertEquals(null, f.parseMountPoint(line)); // Can't be parsed
-		line = "/dev/sdd1 on /media/HAZ SPACE(!) type vfat"
-			+ " (rw,nosuid,nodev,uhelper=udisks,uid=1000,gid=1000,"
-			+ "shortname=mixed,dmask=0077,utf8=1,showexec,flush)";
-		assertEquals("/media/HAZ SPACE(!)", f.parseMountPoint(line));
-	}
-}

bramble-j2se/src/test/java/org/briarproject/bramble/plugin/file/MacRemovableDriveFinderTest.java

@@ -1,24 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import org.briarproject.bramble.test.BrambleTestCase;
-import org.junit.Test;
-
-import static org.junit.Assert.assertEquals;
-
-public class MacRemovableDriveFinderTest extends BrambleTestCase {
-
-	@Test
-	public void testParseMountPoint() {
-		MacRemovableDriveFinder f = new MacRemovableDriveFinder();
-		String line = "/dev/disk0s3 on / (local, journaled)";
-		assertEquals("/", f.parseMountPoint(line));
-		line = "devfs on /dev (local)";
-		assertEquals(null, f.parseMountPoint(line)); // Can't be parsed
-		line = "<volfs> on /.vol";
-		assertEquals(null, f.parseMountPoint(line)); // Can't be parsed
-		line = "automount -nsl [117] on /Network (automounted)";
-		assertEquals(null, f.parseMountPoint(line)); // Can't be parsed
-		line = "/dev/disk1s1 on /Volumes/HAZ SPACE(!) (local, nodev, nosuid)";
-		assertEquals("/Volumes/HAZ SPACE(!)", f.parseMountPoint(line));
-	}
-}

bramble-j2se/src/test/java/org/briarproject/bramble/plugin/file/PollingRemovableDriveMonitorTest.java

@@ -1,107 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.plugin.file.RemovableDriveMonitor.Callback;
-import org.briarproject.bramble.test.BrambleTestCase;
-import org.junit.Test;
-
-import java.io.File;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.List;
-import java.util.concurrent.CountDownLatch;
-import java.util.concurrent.Executors;
-import java.util.concurrent.atomic.AtomicBoolean;
-
-import static java.util.concurrent.TimeUnit.SECONDS;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
-
-public class PollingRemovableDriveMonitorTest extends BrambleTestCase {
-
-	@Test
-	public void testOneCallbackPerFile() throws Exception {
-		// Create a finder that returns no files the first time, then two files
-		File file1 = new File("foo");
-		File file2 = new File("bar");
-		@NotNullByDefault
-		RemovableDriveFinder finder = new RemovableDriveFinder() {
-
-			private AtomicBoolean firstCall = new AtomicBoolean(true);
-
-			@Override
-			public Collection<File> findRemovableDrives() throws IOException {
-				if (firstCall.getAndSet(false)) return Collections.emptyList();
-				else return Arrays.asList(file1, file2);
-			}
-		};
-		// Create a callback that waits for two files
-		CountDownLatch latch = new CountDownLatch(2);
-		List<File> detected = new ArrayList<>();
-		@NotNullByDefault
-		Callback callback = new Callback() {
-
-			@Override
-			public void driveInserted(File f) {
-				detected.add(f);
-				latch.countDown();
-			}
-
-			@Override
-			public void exceptionThrown(IOException e) {
-				fail();
-			}
-		};
-		// Create the monitor and start it
-		RemovableDriveMonitor monitor = new PollingRemovableDriveMonitor(
-				Executors.newCachedThreadPool(), finder, 1);
-		monitor.start(callback);
-		// Wait for the monitor to detect the files
-		assertTrue(latch.await(10, SECONDS));
-		monitor.stop();
-		// Check that both files were detected
-		assertEquals(2, detected.size());
-		assertTrue(detected.contains(file1));
-		assertTrue(detected.contains(file2));
-	}
-
-	@Test
-	public void testExceptionCallback() throws Exception {
-		// Create a finder that throws an exception the second time it's polled
-		RemovableDriveFinder finder = new RemovableDriveFinder() {
-
-			private AtomicBoolean firstCall = new AtomicBoolean(true);
-
-			@Override
-			public Collection<File> findRemovableDrives() throws IOException {
-				if (firstCall.getAndSet(false)) return Collections.emptyList();
-				else throw new IOException();
-			}
-		};
-		// Create a callback that waits for an exception
-		CountDownLatch latch = new CountDownLatch(1);
-		@NotNullByDefault
-		Callback callback = new Callback() {
-
-			@Override
-			public void driveInserted(File root) {
-				fail();
-			}
-
-			@Override
-			public void exceptionThrown(IOException e) {
-				latch.countDown();
-			}
-		};
-		// Create the monitor and start it
-		RemovableDriveMonitor monitor = new PollingRemovableDriveMonitor(
-				Executors.newCachedThreadPool(), finder, 1);
-		monitor.start(callback);
-		assertTrue(latch.await(10, SECONDS));
-		monitor.stop();
-	}
-}

bramble-j2se/src/test/java/org/briarproject/bramble/plugin/file/RemovableDrivePluginTest.java

@@ -1,378 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import org.briarproject.bramble.api.contact.ContactId;
-import org.briarproject.bramble.api.plugin.TransportConnectionWriter;
-import org.briarproject.bramble.api.plugin.simplex.SimplexPluginCallback;
-import org.briarproject.bramble.plugin.file.RemovableDriveMonitor.Callback;
-import org.briarproject.bramble.test.BrambleTestCase;
-import org.briarproject.bramble.test.ImmediateExecutor;
-import org.briarproject.bramble.test.TestUtils;
-import org.jmock.Expectations;
-import org.jmock.Mockery;
-import org.jmock.lib.concurrent.Synchroniser;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-
-import java.io.File;
-import java.io.FileOutputStream;
-import java.io.OutputStream;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
-import java.util.concurrent.Executor;
-
-import static org.briarproject.bramble.api.transport.TransportConstants.MIN_STREAM_LENGTH;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertNull;
-import static org.junit.Assert.assertTrue;
-
-public class RemovableDrivePluginTest extends BrambleTestCase {
-
-	private final File testDir = TestUtils.getTestDirectory();
-	private final ContactId contactId = new ContactId(234);
-
-	@Before
-	public void setUp() {
-		testDir.mkdirs();
-	}
-
-	@Test
-	public void testWriterIsNullIfNoDrivesAreFound() throws Exception {
-		List<File> drives = Collections.emptyList();
-
-		Mockery context = new Mockery() {{
-			setThreadingPolicy(new Synchroniser());
-		}};
-		Executor executor = context.mock(Executor.class);
-		SimplexPluginCallback callback =
-				context.mock(SimplexPluginCallback.class);
-		RemovableDriveFinder finder =
-				context.mock(RemovableDriveFinder.class);
-		RemovableDriveMonitor monitor =
-				context.mock(RemovableDriveMonitor.class);
-
-		context.checking(new Expectations() {{
-			oneOf(monitor).start(with(any(Callback.class)));
-			oneOf(finder).findRemovableDrives();
-			will(returnValue(drives));
-		}});
-
-		RemovableDrivePlugin plugin = new RemovableDrivePlugin(executor,
-				callback, finder, monitor, 0);
-		plugin.start();
-
-		assertNull(plugin.createWriter(contactId));
-
-		context.assertIsSatisfied();
-	}
-
-	@Test
-	public void testWriterIsNullIfNoDriveIsChosen() throws Exception {
-		File drive1 = new File(testDir, "1");
-		File drive2 = new File(testDir, "2");
-		List<File> drives = new ArrayList<>();
-		drives.add(drive1);
-		drives.add(drive2);
-
-		Mockery context = new Mockery() {{
-			setThreadingPolicy(new Synchroniser());
-		}};
-		Executor executor = context.mock(Executor.class);
-		SimplexPluginCallback callback =
-				context.mock(SimplexPluginCallback.class);
-		RemovableDriveFinder finder =
-				context.mock(RemovableDriveFinder.class);
-		RemovableDriveMonitor monitor =
-				context.mock(RemovableDriveMonitor.class);
-
-		context.checking(new Expectations() {{
-			oneOf(monitor).start(with(any(Callback.class)));
-			oneOf(finder).findRemovableDrives();
-			will(returnValue(drives));
-			oneOf(callback).showChoice(with(any(String[].class)),
-					with(any(String[].class)));
-			will(returnValue(-1)); // The user cancelled the choice
-		}});
-
-		RemovableDrivePlugin plugin = new RemovableDrivePlugin(executor,
-				callback, finder, monitor, 0);
-		plugin.start();
-
-		assertNull(plugin.createWriter(contactId));
-		File[] files = drive1.listFiles();
-		assertTrue(files == null || files.length == 0);
-
-		context.assertIsSatisfied();
-	}
-
-	@Test
-	public void testWriterIsNullIfOutputDirDoesNotExist() throws Exception {
-		File drive1 = new File(testDir, "1");
-		File drive2 = new File(testDir, "2");
-		List<File> drives = new ArrayList<>();
-		drives.add(drive1);
-		drives.add(drive2);
-
-		Mockery context = new Mockery() {{
-			setThreadingPolicy(new Synchroniser());
-		}};
-		Executor executor = context.mock(Executor.class);
-		SimplexPluginCallback callback =
-				context.mock(SimplexPluginCallback.class);
-		RemovableDriveFinder finder =
-				context.mock(RemovableDriveFinder.class);
-		RemovableDriveMonitor monitor =
-				context.mock(RemovableDriveMonitor.class);
-
-		context.checking(new Expectations() {{
-			oneOf(monitor).start(with(any(Callback.class)));
-			oneOf(finder).findRemovableDrives();
-			will(returnValue(drives));
-			oneOf(callback).showChoice(with(any(String[].class)),
-					with(any(String[].class)));
-			will(returnValue(0)); // The user chose drive1 but it doesn't exist
-		}});
-
-		RemovableDrivePlugin plugin = new RemovableDrivePlugin(executor,
-				callback, finder, monitor, 0);
-		plugin.start();
-
-		assertNull(plugin.createWriter(contactId));
-		File[] files = drive1.listFiles();
-		assertTrue(files == null || files.length == 0);
-
-		context.assertIsSatisfied();
-	}
-
-	@Test
-	public void testWriterIsNullIfOutputDirIsAFile() throws Exception {
-		File drive1 = new File(testDir, "1");
-		File drive2 = new File(testDir, "2");
-		List<File> drives = new ArrayList<>();
-		drives.add(drive1);
-		drives.add(drive2);
-		// Create drive1 as a file rather than a directory
-		assertTrue(drive1.createNewFile());
-
-		Mockery context = new Mockery() {{
-			setThreadingPolicy(new Synchroniser());
-		}};
-		Executor executor = context.mock(Executor.class);
-		SimplexPluginCallback callback =
-				context.mock(SimplexPluginCallback.class);
-		RemovableDriveFinder finder =
-				context.mock(RemovableDriveFinder.class);
-		RemovableDriveMonitor monitor =
-				context.mock(RemovableDriveMonitor.class);
-
-		context.checking(new Expectations() {{
-			oneOf(monitor).start(with(any(Callback.class)));
-			oneOf(finder).findRemovableDrives();
-			will(returnValue(drives));
-			oneOf(callback).showChoice(with(any(String[].class)),
-					with(any(String[].class)));
-			will(returnValue(0)); // The user chose drive1 but it's not a dir
-		}});
-
-		RemovableDrivePlugin plugin = new RemovableDrivePlugin(executor,
-				callback, finder, monitor, 0);
-		plugin.start();
-
-		assertNull(plugin.createWriter(contactId));
-		File[] files = drive1.listFiles();
-		assertTrue(files == null || files.length == 0);
-
-		context.assertIsSatisfied();
-	}
-
-	@Test
-	public void testWriterIsNotNullIfOutputDirIsADir() throws Exception {
-		File drive1 = new File(testDir, "1");
-		File drive2 = new File(testDir, "2");
-		List<File> drives = new ArrayList<>();
-		drives.add(drive1);
-		drives.add(drive2);
-		// Create drive1 as a directory
-		assertTrue(drive1.mkdir());
-
-		Mockery context = new Mockery() {{
-			setThreadingPolicy(new Synchroniser());
-		}};
-		Executor executor = context.mock(Executor.class);
-		SimplexPluginCallback callback =
-				context.mock(SimplexPluginCallback.class);
-		RemovableDriveFinder finder =
-				context.mock(RemovableDriveFinder.class);
-		RemovableDriveMonitor monitor =
-				context.mock(RemovableDriveMonitor.class);
-
-		context.checking(new Expectations() {{
-			oneOf(monitor).start(with(any(Callback.class)));
-			oneOf(finder).findRemovableDrives();
-			will(returnValue(drives));
-			oneOf(callback).showChoice(with(any(String[].class)),
-					with(any(String[].class)));
-			will(returnValue(0)); // The user chose drive1
-		}});
-
-		RemovableDrivePlugin plugin = new RemovableDrivePlugin(executor,
-				callback, finder, monitor, 0);
-		plugin.start();
-
-		assertNotNull(plugin.createWriter(contactId));
-		// The output file should exist and should be empty
-		File[] files = drive1.listFiles();
-		assertNotNull(files);
-		assertEquals(1, files.length);
-		assertEquals(0, files[0].length());
-
-		context.assertIsSatisfied();
-	}
-
-	@Test
-	public void testWritingToWriter() throws Exception {
-		File drive1 = new File(testDir, "1");
-		File drive2 = new File(testDir, "2");
-		List<File> drives = new ArrayList<>();
-		drives.add(drive1);
-		drives.add(drive2);
-		// Create drive1 as a directory
-		assertTrue(drive1.mkdir());
-
-		Mockery context = new Mockery() {{
-			setThreadingPolicy(new Synchroniser());
-		}};
-		Executor executor = context.mock(Executor.class);
-		SimplexPluginCallback callback =
-				context.mock(SimplexPluginCallback.class);
-		RemovableDriveFinder finder =
-				context.mock(RemovableDriveFinder.class);
-		RemovableDriveMonitor monitor =
-				context.mock(RemovableDriveMonitor.class);
-
-		context.checking(new Expectations() {{
-			oneOf(monitor).start(with(any(Callback.class)));
-			oneOf(finder).findRemovableDrives();
-			will(returnValue(drives));
-			oneOf(callback).showChoice(with(any(String[].class)),
-					with(any(String[].class)));
-			will(returnValue(0)); // The user chose drive1
-			oneOf(callback).showMessage(with(any(String[].class)));
-		}});
-
-		RemovableDrivePlugin plugin = new RemovableDrivePlugin(executor,
-				callback, finder, monitor, 0);
-		plugin.start();
-
-		TransportConnectionWriter writer = plugin.createWriter(contactId);
-		assertNotNull(writer);
-		// The output file should exist and should be empty
-		File[] files = drive1.listFiles();
-		assertNotNull(files);
-		assertEquals(1, files.length);
-		assertEquals(0, files[0].length());
-		// Writing to the output stream should increase the size of the file
-		OutputStream out = writer.getOutputStream();
-		out.write(new byte[1234]);
-		out.flush();
-		out.close();
-		// Disposing of the writer should not delete the file
-		writer.dispose(false);
-		assertTrue(files[0].exists());
-		assertEquals(1234, files[0].length());
-
-		context.assertIsSatisfied();
-	}
-
-	@Test
-	public void testEmptyDriveIsIgnored() throws Exception {
-		Mockery context = new Mockery() {{
-			setThreadingPolicy(new Synchroniser());
-		}};
-		Executor executor = context.mock(Executor.class);
-		SimplexPluginCallback callback =
-				context.mock(SimplexPluginCallback.class);
-		RemovableDriveFinder finder =
-				context.mock(RemovableDriveFinder.class);
-		RemovableDriveMonitor monitor =
-				context.mock(RemovableDriveMonitor.class);
-
-		context.checking(new Expectations() {{
-			oneOf(monitor).start(with(any(Callback.class)));
-		}});
-
-		RemovableDrivePlugin plugin = new RemovableDrivePlugin(executor,
-				callback, finder, monitor, 0);
-		plugin.start();
-
-		plugin.driveInserted(testDir);
-
-		context.assertIsSatisfied();
-	}
-
-	@Test
-	public void testFilenames() {
-		Mockery context = new Mockery() {{
-			setThreadingPolicy(new Synchroniser());
-		}};
-		Executor executor = context.mock(Executor.class);
-		SimplexPluginCallback callback =
-				context.mock(SimplexPluginCallback.class);
-		RemovableDriveFinder finder =
-				context.mock(RemovableDriveFinder.class);
-		RemovableDriveMonitor monitor =
-				context.mock(RemovableDriveMonitor.class);
-
-		RemovableDrivePlugin plugin = new RemovableDrivePlugin(executor,
-				callback, finder, monitor, 0);
-
-		assertFalse(plugin.isPossibleConnectionFilename("abcdefg.dat"));
-		assertFalse(plugin.isPossibleConnectionFilename("abcdefghi.dat"));
-		assertFalse(plugin.isPossibleConnectionFilename("abcdefgh_dat"));
-		assertFalse(plugin.isPossibleConnectionFilename("abcdefgh.rat"));
-		assertTrue(plugin.isPossibleConnectionFilename("abcdefgh.dat"));
-		assertTrue(plugin.isPossibleConnectionFilename("ABCDEFGH.DAT"));
-
-		context.assertIsSatisfied();
-	}
-
-	@Test
-	public void testReaderIsCreated() throws Exception {
-		Mockery context = new Mockery() {{
-			setThreadingPolicy(new Synchroniser());
-		}};
-		SimplexPluginCallback callback =
-				context.mock(SimplexPluginCallback.class);
-		RemovableDriveFinder finder =
-				context.mock(RemovableDriveFinder.class);
-		RemovableDriveMonitor monitor =
-				context.mock(RemovableDriveMonitor.class);
-
-		context.checking(new Expectations() {{
-			oneOf(monitor).start(with(any(Callback.class)));
-			oneOf(callback).readerCreated(with(any(FileTransportReader.class)));
-		}});
-
-		RemovableDrivePlugin plugin = new RemovableDrivePlugin(
-				new ImmediateExecutor(), callback, finder, monitor, 0);
-		plugin.start();
-
-		File f = new File(testDir, "abcdefgh.dat");
-		OutputStream out = new FileOutputStream(f);
-		out.write(new byte[MIN_STREAM_LENGTH]);
-		out.flush();
-		out.close();
-		assertEquals(MIN_STREAM_LENGTH, f.length());
-		plugin.driveInserted(testDir);
-
-		context.assertIsSatisfied();
-	}
-
-	@After
-	public void tearDown() {
-		TestUtils.deleteTestDirectory(testDir);
-	}
-}

bramble-j2se/src/test/java/org/briarproject/bramble/plugin/file/UnixRemovableDriveMonitorTest.java

@@ -1,112 +0,0 @@
-package org.briarproject.bramble.plugin.file;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.plugin.file.RemovableDriveMonitor.Callback;
-import org.briarproject.bramble.test.BrambleTestCase;
-import org.briarproject.bramble.test.TestUtils;
-import org.briarproject.bramble.util.OsUtils;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-
-import java.io.File;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.concurrent.CountDownLatch;
-
-import static java.util.concurrent.TimeUnit.SECONDS;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
-
-public class UnixRemovableDriveMonitorTest extends BrambleTestCase {
-
-	private final File testDir = TestUtils.getTestDirectory();
-
-	@Before
-	public void setUp() {
-		testDir.mkdirs();
-	}
-
-	@Test
-	public void testNonexistentDir() throws Exception {
-		if (!(OsUtils.isLinux() || OsUtils.isMacLeopardOrNewer())) {
-			System.err.println("WARNING: Skipping test, can't run on this OS");
-			return;
-		}
-		File doesNotExist = new File(testDir, "doesNotExist");
-		RemovableDriveMonitor monitor = createMonitor(doesNotExist);
-		@NotNullByDefault
-		Callback callback = new Callback() {
-
-			@Override
-			public void driveInserted(File root) {
-				fail();
-			}
-
-			@Override
-			public void exceptionThrown(IOException e) {
-				fail();
-			}
-		};
-		monitor.start(callback);
-		monitor.stop();
-	}
-
-	@Test
-	public void testOneCallbackPerFile() throws Exception {
-		if (!(OsUtils.isLinux() || OsUtils.isMacLeopardOrNewer())) {
-			System.err.println("WARNING: Skipping test, can't run on this OS");
-			return;
-		}
-		// Create a callback that will wait for two files before stopping
-		List<File> detected = new ArrayList<>();
-		CountDownLatch latch = new CountDownLatch(2);
-		@NotNullByDefault
-		Callback callback = new Callback() {
-
-			@Override
-			public void driveInserted(File f) {
-				detected.add(f);
-				latch.countDown();
-			}
-
-			@Override
-			public void exceptionThrown(IOException e) {
-				fail();
-			}
-		};
-		// Create the monitor and start it
-		RemovableDriveMonitor monitor = createMonitor(testDir);
-		monitor.start(callback);
-		// Create two files in the test directory
-		File file1 = new File(testDir, "1");
-		File file2 = new File(testDir, "2");
-		assertTrue(file1.createNewFile());
-		assertTrue(file2.createNewFile());
-		// Wait for the monitor to detect the files
-		assertTrue(latch.await(5, SECONDS));
-		monitor.stop();
-		// Check that both files were detected
-		assertEquals(2, detected.size());
-		assertTrue(detected.contains(file1));
-		assertTrue(detected.contains(file2));
-	}
-
-	@After
-	public void tearDown() {
-		TestUtils.deleteTestDirectory(testDir);
-	}
-
-	private RemovableDriveMonitor createMonitor(File dir) {
-		@NotNullByDefault
-		RemovableDriveMonitor monitor = new UnixRemovableDriveMonitor() {
-			@Override
-			protected String[] getPathsToWatch() {
-				return new String[] {dir.getPath()};
-			}
-		};
-		return monitor;
-	}
-}

bramble-j2se/src/test/java/org/briarproject/bramble/plugin/modem/ModemPluginTest.java

@@ -1,6 +1,5 @@
 package org.briarproject.bramble.plugin.modem;
 
-import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginCallback;
 import org.briarproject.bramble.api.properties.TransportProperties;
 import org.briarproject.bramble.test.BrambleTestCase;
@@ -66,7 +65,6 @@ public class ModemPluginTest extends BrambleTestCase {
 		TransportProperties remote = new TransportProperties();
 		remote.put("iso3166", ISO_1336);
 		remote.put("number", NUMBER);
-		ContactId contactId = new ContactId(234);
 		context.checking(new Expectations() {{
 			// start()
 			oneOf(serialPortList).getPortNames();
@@ -78,14 +76,12 @@ public class ModemPluginTest extends BrambleTestCase {
 			// createConnection()
 			oneOf(callback).getLocalProperties();
 			will(returnValue(local));
-			oneOf(callback).getRemoteProperties(contactId);
-			will(returnValue(remote));
 			oneOf(modem).dial(NUMBER);
 			will(returnValue(true));
 		}});
 		plugin.start();
 		// A connection should be returned
-		assertNotNull(plugin.createConnection(contactId));
+		assertNotNull(plugin.createConnection(remote));
 		context.assertIsSatisfied();
 	}
 
@@ -105,7 +101,6 @@ public class ModemPluginTest extends BrambleTestCase {
 		TransportProperties remote = new TransportProperties();
 		remote.put("iso3166", ISO_1336);
 		remote.put("number", NUMBER);
-		ContactId contactId = new ContactId(234);
 		context.checking(new Expectations() {{
 			// start()
 			oneOf(serialPortList).getPortNames();
@@ -117,14 +112,12 @@ public class ModemPluginTest extends BrambleTestCase {
 			// createConnection()
 			oneOf(callback).getLocalProperties();
 			will(returnValue(local));
-			oneOf(callback).getRemoteProperties(contactId);
-			will(returnValue(remote));
 			oneOf(modem).dial(NUMBER);
 			will(returnValue(false));
 		}});
 		plugin.start();
 		// No connection should be returned
-		assertNull(plugin.createConnection(contactId));
+		assertNull(plugin.createConnection(remote));
 		context.assertIsSatisfied();
 	}
 
@@ -144,7 +137,6 @@ public class ModemPluginTest extends BrambleTestCase {
 		TransportProperties remote = new TransportProperties();
 		remote.put("iso3166", ISO_1336);
 		remote.put("number", NUMBER);
-		ContactId contactId = new ContactId(234);
 		context.checking(new Expectations() {{
 			// start()
 			oneOf(serialPortList).getPortNames();
@@ -156,8 +148,6 @@ public class ModemPluginTest extends BrambleTestCase {
 			// createConnection()
 			oneOf(callback).getLocalProperties();
 			will(returnValue(local));
-			oneOf(callback).getRemoteProperties(contactId);
-			will(returnValue(remote));
 			oneOf(modem).dial(NUMBER);
 			will(throwException(new IOException()));
 			// resetModem()
@@ -170,7 +160,7 @@ public class ModemPluginTest extends BrambleTestCase {
 		}});
 		plugin.start();
 		// No connection should be returned
-		assertNull(plugin.createConnection(contactId));
+		assertNull(plugin.createConnection(remote));
 		context.assertIsSatisfied();
 	}
 }

briar-android/src/main/java/org/briarproject/briar/android/AppModule.java

@@ -1,6 +1,7 @@
 package org.briarproject.briar.android;
 
 import android.app.Application;
+import android.content.Context;
 import android.content.SharedPreferences;
 import android.os.StrictMode;
 
@@ -8,12 +9,22 @@ import org.briarproject.bramble.api.crypto.CryptoComponent;
 import org.briarproject.bramble.api.crypto.PublicKey;
 import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.event.EventBus;
+import org.briarproject.bramble.api.lifecycle.IoExecutor;
 import org.briarproject.bramble.api.lifecycle.LifecycleManager;
 import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.bramble.api.plugin.BackoffFactory;
+import org.briarproject.bramble.api.plugin.PluginConfig;
+import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory;
+import org.briarproject.bramble.api.plugin.simplex.SimplexPluginFactory;
 import org.briarproject.bramble.api.reporting.DevConfig;
-import org.briarproject.bramble.api.ui.UiCallback;
+import org.briarproject.bramble.api.system.AndroidExecutor;
+import org.briarproject.bramble.api.system.LocationUtils;
+import org.briarproject.bramble.api.system.Scheduler;
+import org.briarproject.bramble.plugin.bluetooth.AndroidBluetoothPluginFactory;
+import org.briarproject.bramble.plugin.tcp.AndroidLanTcpPluginFactory;
+import org.briarproject.bramble.plugin.tor.TorPluginFactory;
 import org.briarproject.bramble.util.AndroidUtils;
 import org.briarproject.bramble.util.StringUtils;
 import org.briarproject.briar.api.android.AndroidNotificationManager;
@@ -23,14 +34,21 @@ import org.briarproject.briar.api.android.ScreenFilterMonitor;
 
 import java.io.File;
 import java.security.GeneralSecurityException;
+import java.security.SecureRandom;
+import java.util.Collection;
+import java.util.concurrent.Executor;
+import java.util.concurrent.ScheduledExecutorService;
 
 import javax.inject.Inject;
 import javax.inject.Singleton;
+import javax.net.SocketFactory;
 
 import dagger.Module;
 import dagger.Provides;
 
 import static android.content.Context.MODE_PRIVATE;
+import static java.util.Arrays.asList;
+import static java.util.Collections.emptyList;
 import static org.briarproject.bramble.api.reporting.ReportingConstants.DEV_ONION_ADDRESS;
 import static org.briarproject.bramble.api.reporting.ReportingConstants.DEV_PUBLIC_KEY_HEX;
 
@@ -47,27 +65,9 @@ public class AppModule {
 	}
 
 	private final Application application;
-	private final UiCallback uiCallback;
 
 	public AppModule(Application application) {
 		this.application = application;
-		uiCallback = new UiCallback() {
-
-			@Override
-			public int showChoice(String[] options, String... message) {
-				throw new UnsupportedOperationException();
-			}
-
-			@Override
-			public boolean showConfirmationMessage(String... message) {
-				throw new UnsupportedOperationException();
-			}
-
-			@Override
-			public void showMessage(String... message) {
-				throw new UnsupportedOperationException();
-			}
-		};
 	}
 
 	@Provides
@@ -76,11 +76,6 @@ public class AppModule {
 		return application;
 	}
 
-	@Provides
-	UiCallback provideUICallback() {
-		return uiCallback;
-	}
-
 	@Provides
 	@Singleton
 	DatabaseConfig provideDatabaseConfig(Application app) {
@@ -97,6 +92,43 @@ public class AppModule {
 		return databaseConfig;
 	}
 
+	@Provides
+	PluginConfig providePluginConfig(@IoExecutor Executor ioExecutor,
+			@Scheduler ScheduledExecutorService scheduler,
+			AndroidExecutor androidExecutor, SecureRandom random,
+			SocketFactory torSocketFactory, BackoffFactory backoffFactory,
+			Application app, LocationUtils locationUtils, EventBus eventBus) {
+		Context appContext = app.getApplicationContext();
+		DuplexPluginFactory bluetooth =
+				new AndroidBluetoothPluginFactory(ioExecutor, androidExecutor,
+						appContext, random, eventBus, backoffFactory);
+		DuplexPluginFactory tor = new TorPluginFactory(ioExecutor, scheduler,
+				appContext, locationUtils, eventBus,
+				torSocketFactory, backoffFactory);
+		DuplexPluginFactory lan = new AndroidLanTcpPluginFactory(ioExecutor,
+				scheduler, backoffFactory, appContext);
+		Collection<DuplexPluginFactory> duplex = asList(bluetooth, tor, lan);
+		@NotNullByDefault
+		PluginConfig pluginConfig = new PluginConfig() {
+
+			@Override
+			public Collection<DuplexPluginFactory> getDuplexFactories() {
+				return duplex;
+			}
+
+			@Override
+			public Collection<SimplexPluginFactory> getSimplexFactories() {
+				return emptyList();
+			}
+
+			@Override
+			public boolean shouldPoll() {
+				return true;
+			}
+		};
+		return pluginConfig;
+	}
+
 	@Provides
 	@Singleton
 	DevConfig provideDevConfig(Application app, CryptoComponent crypto) {

briar-android/src/main/java/org/briarproject/briar/android/blog/BlogPostViewHolder.java

@@ -1,13 +1,9 @@
 package org.briarproject.briar.android.blog;
 
-import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
-import android.os.Build;
 import android.support.annotation.NonNull;
 import android.support.annotation.UiThread;
-import android.support.v4.app.ActivityCompat;
-import android.support.v4.app.ActivityOptionsCompat;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.view.ViewCompat;
 import android.support.v7.widget.RecyclerView;
@@ -27,7 +23,6 @@ import org.briarproject.briar.api.blog.BlogPostHeader;
 
 import javax.annotation.Nullable;
 
-import static android.support.v4.app.ActivityOptionsCompat.makeSceneTransitionAnimation;
 import static android.view.View.GONE;
 import static android.view.View.VISIBLE;
 import static org.briarproject.briar.android.activity.BriarActivity.GROUP_ID;
@@ -35,7 +30,6 @@ import static org.briarproject.briar.android.blog.BasePostFragment.POST_ID;
 import static org.briarproject.briar.android.util.UiUtils.TEASER_LENGTH;
 import static org.briarproject.briar.android.util.UiUtils.getSpanned;
 import static org.briarproject.briar.android.util.UiUtils.getTeaser;
-import static org.briarproject.briar.android.util.UiUtils.isSamsung7;
 import static org.briarproject.briar.android.util.UiUtils.makeLinksClickable;
 import static org.briarproject.briar.api.blog.MessageType.POST;
 
@@ -135,18 +129,7 @@ class BlogPostViewHolder extends RecyclerView.ViewHolder {
 			Intent i = new Intent(ctx, ReblogActivity.class);
 			i.putExtra(GROUP_ID, item.getGroupId().getBytes());
 			i.putExtra(POST_ID, item.getId().getBytes());
-
-			if (Build.VERSION.SDK_INT >= 23 && !isSamsung7()) {
-				ActivityOptionsCompat options =
-						makeSceneTransitionAnimation((Activity) ctx, layout,
-								getTransitionName(item.getId()));
-				ActivityCompat.startActivity(ctx, i,
-						options.toBundle());
-			} else {
-				// work-around for android bug #224270
-				// work-around for Samsung Android 7 bug #1007
-				ctx.startActivity(i);
-			}
+			ctx.startActivity(i);
 		});
 
 		// comments

briar-android/src/main/java/org/briarproject/briar/android/controller/ConfigControllerImpl.java

@@ -19,7 +19,6 @@ import java.util.logging.Logger;
 import javax.annotation.Nullable;
 import javax.inject.Inject;
 
-import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 
 @NotNullByDefault
@@ -156,21 +155,16 @@ public class ConfigControllerImpl implements ConfigController {
 		SharedPreferences defaultPrefs =
 				PreferenceManager.getDefaultSharedPreferences(ctx);
 		AndroidUtils.deleteAppData(ctx, briarPrefs, defaultPrefs);
-		AndroidUtils.logDataDirContents(ctx);
 	}
 
 	@Override
 	public boolean accountExists() {
 		String hex = getEncryptedDatabaseKey();
-		boolean exists = hex != null && databaseConfig.databaseExists();
-		if (LOG.isLoggable(INFO)) LOG.info("Account exists: " + exists);
-		return exists;
+		return hex != null && databaseConfig.databaseExists();
 	}
 
 	@Override
 	public boolean accountSignedIn() {
-		boolean signedIn = databaseConfig.getEncryptionKey() != null;
-		if (LOG.isLoggable(INFO)) LOG.info("Signed in: " + signedIn);
-		return signedIn;
+		return databaseConfig.getEncryptionKey() != null;
 	}
 }

briar-android/src/main/java/org/briarproject/briar/android/login/SetupControllerImpl.java

@@ -9,7 +9,6 @@ import org.briarproject.bramble.api.crypto.PasswordStrengthEstimator;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.util.AndroidUtils;
 import org.briarproject.briar.android.controller.handler.ResultHandler;
 import org.briarproject.briar.android.controller.handler.UiResultHandler;
 
@@ -103,14 +102,11 @@ public class SetupControllerImpl extends PasswordControllerImpl
 		if (password == null) throw new IllegalStateException();
 		cryptoExecutor.execute(() -> {
 			LOG.info("Creating account");
-			AndroidUtils.logDataDirContents(setupActivity);
 			databaseConfig.setLocalAuthorName(authorName);
 			SecretKey key = crypto.generateSecretKey();
 			databaseConfig.setEncryptionKey(key);
 			String hex = encryptDatabaseKey(key, password);
 			storeEncryptedDatabaseKey(hex);
-			LOG.info("Created account");
-			AndroidUtils.logDataDirContents(setupActivity);
 			resultHandler.onResult(null);
 		});
 	}

briar-android/src/main/java/org/briarproject/briar/android/splash/SplashScreenActivity.java

@@ -8,7 +8,6 @@ import android.support.v7.preference.PreferenceManager;
 import android.transition.Fade;
 
 import org.briarproject.bramble.api.system.AndroidExecutor;
-import org.briarproject.bramble.util.AndroidUtils;
 import org.briarproject.briar.R;
 import org.briarproject.briar.android.activity.ActivityComponent;
 import org.briarproject.briar.android.activity.BaseActivity;
@@ -45,11 +44,9 @@ public class SplashScreenActivity extends BaseActivity {
 		setContentView(R.layout.splash);
 
 		if (configController.accountSignedIn()) {
-			LOG.info("Already signed in, not showing splash screen");
 			startActivity(new Intent(this, OpenDatabaseActivity.class));
 			finish();
 		} else {
-			LOG.info("Showing splash screen");
 			new Handler().postDelayed(() -> {
 				startNextActivity();
 				supportFinishAfterTransition();
@@ -67,7 +64,6 @@ public class SplashScreenActivity extends BaseActivity {
 			LOG.info("Expired");
 			startActivity(new Intent(this, ExpiredActivity.class));
 		} else {
-			AndroidUtils.logDataDirContents(this);
 			if (configController.accountExists()) {
 				LOG.info("Account exists");
 				startActivity(new Intent(this, OpenDatabaseActivity.class));
@@ -80,10 +76,8 @@ public class SplashScreenActivity extends BaseActivity {
 	}
 
 	private void setPreferencesDefaults() {
-		androidExecutor.runOnBackgroundThread(() -> {
- 			PreferenceManager.setDefaultValues(SplashScreenActivity.this,
-					R.xml.panic_preferences, false);
-			LOG.info("Finished setting panic preference defaults");
-		});
+		androidExecutor.runOnBackgroundThread(() ->
+				PreferenceManager.setDefaultValues(SplashScreenActivity.this,
+						R.xml.panic_preferences, false));
 	}
 }

briar-android/src/main/java/org/briarproject/briar/android/threaded/ThreadListActivity.java

@@ -89,6 +89,8 @@ public abstract class ThreadListActivity<G extends NamedGroup, I extends ThreadI
 		textInput.setListener(this);
 		list = findViewById(R.id.list);
 		layoutManager = new LinearLayoutManager(this);
+		// FIXME pre-fetching messes with read state, find better solution #1289
+		layoutManager.setItemPrefetchEnabled(false);
 		list.setLayoutManager(layoutManager);
 		adapter = createAdapter(layoutManager);
 		list.setAdapter(adapter);

build.gradle

@@ -21,7 +21,6 @@ buildscript {
 	dependencies {
 		classpath 'com.android.tools.build:gradle:3.1.2'
 		classpath 'net.ltgt.gradle:gradle-apt-plugin:0.9'
-		classpath 'de.undercouch:gradle-download-task:3.2.0'
 		classpath 'ru.vyarus:gradle-animalsniffer-plugin:1.4.3'
 		classpath files('libs/gradle-witness.jar')
 	}