Refactor wake lock creation.

bramble-android/src/main/java/org/briarproject/bramble/api/system/AndroidWakeLock.java

@@ -0,0 +1,19 @@
+package org.briarproject.bramble.api.system;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+@NotNullByDefault
+public interface AndroidWakeLock {
+
+	/**
+	 * Acquires the wake lock. This has no effect if the wake lock has already
+	 * been acquired.
+	 */
+	void acquire();
+
+	/**
+	 * Releases the wake lock. This has no effect if the wake lock has already
+	 * been released.
+	 */
+	void release();
+}

bramble-android/src/main/java/org/briarproject/bramble/api/system/AndroidWakeLockFactory.java

@@ -0,0 +1,16 @@
+package org.briarproject.bramble.api.system;
+
+import android.os.PowerManager;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+@NotNullByDefault
+public interface AndroidWakeLockFactory {
+
+	/**
+	 * Creates and returns a wake lock.
+	 *
+	 * @param levelAndFlags See {@link PowerManager#newWakeLock(int, String)}
+	 */
+	AndroidWakeLock createWakeLock(int levelAndFlags);
+}

bramble-android/src/main/java/org/briarproject/bramble/plugin/bluetooth/AndroidBluetoothConnectionFactory.java

@@ -0,0 +1,36 @@
+package org.briarproject.bramble.plugin.bluetooth;
+
+import android.bluetooth.BluetoothSocket;
+
+import org.briarproject.bramble.api.io.TimeoutMonitor;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.plugin.duplex.DuplexPlugin;
+import org.briarproject.bramble.api.plugin.duplex.DuplexTransportConnection;
+import org.briarproject.bramble.api.system.AndroidWakeLockFactory;
+
+import java.io.IOException;
+
+@NotNullByDefault
+class AndroidBluetoothConnectionFactory
+		implements BluetoothConnectionFactory<BluetoothSocket> {
+
+	private final BluetoothConnectionLimiter connectionLimiter;
+	private final AndroidWakeLockFactory wakeLockFactory;
+	private final TimeoutMonitor timeoutMonitor;
+
+	AndroidBluetoothConnectionFactory(
+			BluetoothConnectionLimiter connectionLimiter,
+			AndroidWakeLockFactory wakeLockFactory,
+			TimeoutMonitor timeoutMonitor) {
+		this.connectionLimiter = connectionLimiter;
+		this.wakeLockFactory = wakeLockFactory;
+		this.timeoutMonitor = timeoutMonitor;
+	}
+
+	@Override
+	public DuplexTransportConnection wrapSocket(DuplexPlugin plugin,
+			BluetoothSocket s) throws IOException {
+		return new AndroidBluetoothTransportConnection(plugin,
+				connectionLimiter, wakeLockFactory, timeoutMonitor, s);
+	}
+}

bramble-android/src/main/java/org/briarproject/bramble/plugin/bluetooth/AndroidBluetoothPlugin.java

@@ -9,7 +9,6 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 
-import org.briarproject.bramble.api.io.TimeoutMonitor;
 import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
 import org.briarproject.bramble.api.plugin.Backoff;
@@ -18,7 +17,6 @@ import org.briarproject.bramble.api.plugin.PluginException;
 import org.briarproject.bramble.api.plugin.duplex.DuplexTransportConnection;
 import org.briarproject.bramble.api.system.AndroidExecutor;
 import org.briarproject.bramble.api.system.Clock;
-import org.briarproject.bramble.api.system.TaskScheduler;
 import org.briarproject.bramble.util.AndroidUtils;
 import org.briarproject.bramble.util.IoUtils;
 
@@ -60,14 +58,14 @@ import static org.briarproject.bramble.util.PrivacyUtils.scrubMacAddress;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
-class AndroidBluetoothPlugin extends BluetoothPlugin<BluetoothServerSocket> {
+class AndroidBluetoothPlugin
+		extends BluetoothPlugin<BluetoothSocket, BluetoothServerSocket> {
 
 	private static final Logger LOG =
 			getLogger(AndroidBluetoothPlugin.class.getName());
 
 	private static final int MAX_DISCOVERY_MS = 10_000;
 
-	private final TaskScheduler scheduler;
 	private final AndroidExecutor androidExecutor;
 	private final Context appContext;
 	private final Clock clock;
@@ -79,10 +77,9 @@ class AndroidBluetoothPlugin extends BluetoothPlugin<BluetoothServerSocket> {
 	private volatile BluetoothAdapter adapter = null;
 
 	AndroidBluetoothPlugin(BluetoothConnectionLimiter connectionLimiter,
-			TimeoutMonitor timeoutMonitor,
+			BluetoothConnectionFactory<BluetoothSocket> connectionFactory,
 			Executor ioExecutor,
 			SecureRandom secureRandom,
-			TaskScheduler scheduler,
 			AndroidExecutor androidExecutor,
 			Context appContext,
 			Clock clock,
@@ -90,9 +87,8 @@ class AndroidBluetoothPlugin extends BluetoothPlugin<BluetoothServerSocket> {
 			PluginCallback callback,
 			int maxLatency,
 			int maxIdleTime) {
-		super(connectionLimiter, timeoutMonitor, ioExecutor, secureRandom,
+		super(connectionLimiter, connectionFactory, ioExecutor, secureRandom,
 				backoff, callback, maxLatency, maxIdleTime);
-		this.scheduler = scheduler;
 		this.androidExecutor = androidExecutor;
 		this.appContext = appContext;
 		this.clock = clock;
@@ -187,13 +183,7 @@ class AndroidBluetoothPlugin extends BluetoothPlugin<BluetoothServerSocket> {
 	@Override
 	DuplexTransportConnection acceptConnection(BluetoothServerSocket ss)
 			throws IOException {
-		return wrapSocket(ss.accept());
-	}
-
-	private DuplexTransportConnection wrapSocket(BluetoothSocket s)
-			throws IOException {
-		return new AndroidBluetoothTransportConnection(this, connectionLimiter,
-				timeoutMonitor, appContext, scheduler, s);
+		return connectionFactory.wrapSocket(this, ss.accept());
 	}
 
 	@Override
@@ -210,7 +200,7 @@ class AndroidBluetoothPlugin extends BluetoothPlugin<BluetoothServerSocket> {
 		try {
 			s = d.createInsecureRfcommSocketToServiceRecord(u);
 			s.connect();
-			return wrapSocket(s);
+			return connectionFactory.wrapSocket(this, s);
 		} catch (IOException e) {
 			IoUtils.tryToClose(s, LOG, WARNING);
 			throw e;

bramble-android/src/main/java/org/briarproject/bramble/plugin/bluetooth/AndroidBluetoothPluginFactory.java

@@ -1,5 +1,6 @@
 package org.briarproject.bramble.plugin.bluetooth;
 
+import android.bluetooth.BluetoothSocket;
 import android.content.Context;
 
 import org.briarproject.bramble.api.event.EventBus;
@@ -12,8 +13,8 @@ import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPlugin;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory;
 import org.briarproject.bramble.api.system.AndroidExecutor;
+import org.briarproject.bramble.api.system.AndroidWakeLockFactory;
 import org.briarproject.bramble.api.system.Clock;
-import org.briarproject.bramble.api.system.TaskScheduler;
 
 import java.security.SecureRandom;
 import java.util.concurrent.Executor;
@@ -33,8 +34,8 @@ public class AndroidBluetoothPluginFactory implements DuplexPluginFactory {
 	private static final double BACKOFF_BASE = 1.2;
 
 	private final Executor ioExecutor;
-	private final TaskScheduler scheduler;
 	private final AndroidExecutor androidExecutor;
+	private final AndroidWakeLockFactory wakeLockFactory;
 	private final Context appContext;
 	private final SecureRandom secureRandom;
 	private final EventBus eventBus;
@@ -43,8 +44,8 @@ public class AndroidBluetoothPluginFactory implements DuplexPluginFactory {
 	private final BackoffFactory backoffFactory;
 
 	public AndroidBluetoothPluginFactory(Executor ioExecutor,
-			TaskScheduler scheduler,
 			AndroidExecutor androidExecutor,
+			AndroidWakeLockFactory wakeLockFactory,
 			Context appContext,
 			SecureRandom secureRandom,
 			EventBus eventBus,
@@ -52,8 +53,8 @@ public class AndroidBluetoothPluginFactory implements DuplexPluginFactory {
 			TimeoutMonitor timeoutMonitor,
 			BackoffFactory backoffFactory) {
 		this.ioExecutor = ioExecutor;
-		this.scheduler = scheduler;
 		this.androidExecutor = androidExecutor;
+		this.wakeLockFactory = wakeLockFactory;
 		this.appContext = appContext;
 		this.secureRandom = secureRandom;
 		this.eventBus = eventBus;
@@ -76,12 +77,15 @@ public class AndroidBluetoothPluginFactory implements DuplexPluginFactory {
 	public DuplexPlugin createPlugin(PluginCallback callback) {
 		BluetoothConnectionLimiter connectionLimiter =
 				new BluetoothConnectionLimiterImpl(eventBus);
+		BluetoothConnectionFactory<BluetoothSocket> connectionFactory =
+				new AndroidBluetoothConnectionFactory(connectionLimiter,
+						wakeLockFactory, timeoutMonitor);
 		Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,
 				MAX_POLLING_INTERVAL, BACKOFF_BASE);
 		AndroidBluetoothPlugin plugin = new AndroidBluetoothPlugin(
-				connectionLimiter, timeoutMonitor, ioExecutor, secureRandom,
-				scheduler, androidExecutor, appContext, clock, backoff,
-				callback, MAX_LATENCY, MAX_IDLE_TIME);
+				connectionLimiter, connectionFactory, ioExecutor, secureRandom,
+				androidExecutor, appContext, clock, backoff, callback,
+				MAX_LATENCY, MAX_IDLE_TIME);
 		eventBus.addListener(plugin);
 		return plugin;
 	}

bramble-android/src/main/java/org/briarproject/bramble/plugin/bluetooth/AndroidBluetoothTransportConnection.java

@@ -1,26 +1,20 @@
 package org.briarproject.bramble.plugin.bluetooth;
 
 import android.bluetooth.BluetoothSocket;
-import android.content.Context;
-import android.os.PowerManager;
 
 import org.briarproject.bramble.api.io.TimeoutMonitor;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.Plugin;
 import org.briarproject.bramble.api.plugin.duplex.AbstractDuplexTransportConnection;
-import org.briarproject.bramble.api.system.TaskScheduler;
-import org.briarproject.bramble.util.RenewableWakeLock;
+import org.briarproject.bramble.api.system.AndroidWakeLock;
+import org.briarproject.bramble.api.system.AndroidWakeLockFactory;
 
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 
-import static android.content.Context.POWER_SERVICE;
 import static android.os.PowerManager.PARTIAL_WAKE_LOCK;
-import static java.util.concurrent.TimeUnit.MINUTES;
-import static org.briarproject.bramble.api.nullsafety.NullSafety.requireNonNull;
 import static org.briarproject.bramble.api.plugin.BluetoothConstants.PROP_ADDRESS;
-import static org.briarproject.bramble.util.AndroidUtils.getWakeLockTag;
 import static org.briarproject.bramble.util.AndroidUtils.isValidBluetoothAddress;
 
 @NotNullByDefault
@@ -28,26 +22,21 @@ class AndroidBluetoothTransportConnection
 		extends AbstractDuplexTransportConnection {
 
 	private final BluetoothConnectionLimiter connectionLimiter;
-	private final RenewableWakeLock wakeLock;
 	private final BluetoothSocket socket;
 	private final InputStream in;
+	private final AndroidWakeLock wakeLock;
 
 	AndroidBluetoothTransportConnection(Plugin plugin,
 			BluetoothConnectionLimiter connectionLimiter,
+			AndroidWakeLockFactory wakeLockFactory,
 			TimeoutMonitor timeoutMonitor,
-			Context appContext,
-			TaskScheduler scheduler,
 			BluetoothSocket socket) throws IOException {
 		super(plugin);
 		this.connectionLimiter = connectionLimiter;
 		this.socket = socket;
 		in = timeoutMonitor.createTimeoutInputStream(
 				socket.getInputStream(), plugin.getMaxIdleTime() * 2);
-		PowerManager powerManager = (PowerManager)
-				requireNonNull(appContext.getSystemService(POWER_SERVICE));
-		String tag = getWakeLockTag(appContext);
-		wakeLock = new RenewableWakeLock(powerManager, scheduler,
-				PARTIAL_WAKE_LOCK, tag, 1, MINUTES);
+		wakeLock = wakeLockFactory.createWakeLock(PARTIAL_WAKE_LOCK);
 		wakeLock.acquire();
 		String address = socket.getRemoteDevice().getAddress();
 		if (isValidBluetoothAddress(address)) remote.put(PROP_ADDRESS, address);

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

@@ -4,7 +4,6 @@ import android.content.Context;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
-import android.os.PowerManager;
 
 import org.briarproject.bramble.api.battery.BatteryManager;
 import org.briarproject.bramble.api.network.NetworkManager;
@@ -12,11 +11,11 @@ import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
 import org.briarproject.bramble.api.plugin.Backoff;
 import org.briarproject.bramble.api.plugin.PluginCallback;
+import org.briarproject.bramble.api.system.AndroidWakeLock;
+import org.briarproject.bramble.api.system.AndroidWakeLockFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.system.LocationUtils;
 import org.briarproject.bramble.api.system.ResourceProvider;
-import org.briarproject.bramble.api.system.TaskScheduler;
-import org.briarproject.bramble.util.RenewableWakeLock;
 
 import java.io.IOException;
 import java.util.concurrent.Executor;
@@ -24,20 +23,16 @@ import java.util.concurrent.Executor;
 import javax.net.SocketFactory;
 
 import static android.content.Context.MODE_PRIVATE;
-import static android.content.Context.POWER_SERVICE;
 import static android.os.PowerManager.PARTIAL_WAKE_LOCK;
-import static java.util.concurrent.TimeUnit.MINUTES;
-import static org.briarproject.bramble.util.AndroidUtils.getWakeLockTag;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
 class AndroidTorPlugin extends TorPlugin {
 
 	private final Context appContext;
-	private final RenewableWakeLock wakeLock;
+	private final AndroidWakeLock wakeLock;
 
 	AndroidTorPlugin(Executor ioExecutor,
-			TaskScheduler scheduler,
 			Context appContext,
 			NetworkManager networkManager,
 			LocationUtils locationUtils,
@@ -46,6 +41,7 @@ class AndroidTorPlugin extends TorPlugin {
 			ResourceProvider resourceProvider,
 			CircumventionProvider circumventionProvider,
 			BatteryManager batteryManager,
+			AndroidWakeLockFactory wakeLockFactory,
 			Backoff backoff,
 			TorRendezvousCrypto torRendezvousCrypto,
 			PluginCallback callback,
@@ -58,11 +54,7 @@ class AndroidTorPlugin extends TorPlugin {
 				maxLatency, maxIdleTime,
 				appContext.getDir("tor", MODE_PRIVATE));
 		this.appContext = appContext;
-		PowerManager pm = (PowerManager)
-				appContext.getSystemService(POWER_SERVICE);
-		if (pm == null) throw new AssertionError();
-		wakeLock = new RenewableWakeLock(pm, scheduler, PARTIAL_WAKE_LOCK,
-				getWakeLockTag(appContext), 1, MINUTES);
+		wakeLock = wakeLockFactory.createWakeLock(PARTIAL_WAKE_LOCK);
 	}
 
 	@Override

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

@@ -13,10 +13,10 @@ import org.briarproject.bramble.api.plugin.TorConstants;
 import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPlugin;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory;
+import org.briarproject.bramble.api.system.AndroidWakeLockFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.system.LocationUtils;
 import org.briarproject.bramble.api.system.ResourceProvider;
-import org.briarproject.bramble.api.system.TaskScheduler;
 import org.briarproject.bramble.util.AndroidUtils;
 
 import java.util.concurrent.Executor;
@@ -39,7 +39,6 @@ public class AndroidTorPluginFactory implements DuplexPluginFactory {
 	private static final double BACKOFF_BASE = 1.2;
 
 	private final Executor ioExecutor;
-	private final TaskScheduler scheduler;
 	private final Context appContext;
 	private final NetworkManager networkManager;
 	private final LocationUtils locationUtils;
@@ -49,10 +48,10 @@ public class AndroidTorPluginFactory implements DuplexPluginFactory {
 	private final ResourceProvider resourceProvider;
 	private final CircumventionProvider circumventionProvider;
 	private final BatteryManager batteryManager;
+	private final AndroidWakeLockFactory wakeLockFactory;
 	private final Clock clock;
 
 	public AndroidTorPluginFactory(Executor ioExecutor,
-			TaskScheduler scheduler,
 			Context appContext,
 			NetworkManager networkManager,
 			LocationUtils locationUtils,
@@ -62,9 +61,9 @@ public class AndroidTorPluginFactory implements DuplexPluginFactory {
 			ResourceProvider resourceProvider,
 			CircumventionProvider circumventionProvider,
 			BatteryManager batteryManager,
+			AndroidWakeLockFactory wakeLockFactory,
 			Clock clock) {
 		this.ioExecutor = ioExecutor;
-		this.scheduler = scheduler;
 		this.appContext = appContext;
 		this.networkManager = networkManager;
 		this.locationUtils = locationUtils;
@@ -74,6 +73,7 @@ public class AndroidTorPluginFactory implements DuplexPluginFactory {
 		this.resourceProvider = resourceProvider;
 		this.circumventionProvider = circumventionProvider;
 		this.batteryManager = batteryManager;
+		this.wakeLockFactory = wakeLockFactory;
 		this.clock = clock;
 	}
 
@@ -117,11 +117,11 @@ public class AndroidTorPluginFactory implements DuplexPluginFactory {
 		Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,
 				MAX_POLLING_INTERVAL, BACKOFF_BASE);
 		TorRendezvousCrypto torRendezvousCrypto = new TorRendezvousCryptoImpl();
-		AndroidTorPlugin plugin = new AndroidTorPlugin(ioExecutor, scheduler,
+		AndroidTorPlugin plugin = new AndroidTorPlugin(ioExecutor,
 				appContext, networkManager, locationUtils, torSocketFactory,
 				clock, resourceProvider, circumventionProvider, batteryManager,
-				backoff, torRendezvousCrypto, callback, architecture,
-				MAX_LATENCY, MAX_IDLE_TIME);
+				wakeLockFactory, backoff, torRendezvousCrypto, callback,
+				architecture, MAX_LATENCY, MAX_IDLE_TIME);
 		eventBus.addListener(plugin);
 		return plugin;
 	}

bramble-android/src/main/java/org/briarproject/bramble/system/AndroidSystemModule.java

@@ -2,6 +2,7 @@ package org.briarproject.bramble.system;
 
 import org.briarproject.bramble.api.event.EventExecutor;
 import org.briarproject.bramble.api.system.AndroidExecutor;
+import org.briarproject.bramble.api.system.AndroidWakeLockFactory;
 import org.briarproject.bramble.api.system.LocationUtils;
 import org.briarproject.bramble.api.system.ResourceProvider;
 import org.briarproject.bramble.api.system.SecureRandomProvider;
@@ -47,4 +48,10 @@ public class AndroidSystemModule {
 	ResourceProvider provideResourceProvider(AndroidResourceProvider provider) {
 		return provider;
 	}
+
+	@Provides
+	AndroidWakeLockFactory provideWakeLockFactory(
+			AndroidWakeLockFactoryImpl wakeLockFactory) {
+		return wakeLockFactory;
+	}
 }

bramble-android/src/main/java/org/briarproject/bramble/system/AndroidWakeLockFactoryImpl.java

@@ -0,0 +1,44 @@
+package org.briarproject.bramble.system;
+
+import android.app.Application;
+import android.os.PowerManager;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.system.AndroidWakeLock;
+import org.briarproject.bramble.api.system.AndroidWakeLockFactory;
+import org.briarproject.bramble.api.system.TaskScheduler;
+
+import javax.annotation.concurrent.Immutable;
+import javax.inject.Inject;
+
+import static android.content.Context.POWER_SERVICE;
+import static java.util.concurrent.TimeUnit.MILLISECONDS;
+import static java.util.concurrent.TimeUnit.MINUTES;
+import static org.briarproject.bramble.api.nullsafety.NullSafety.requireNonNull;
+import static org.briarproject.bramble.util.AndroidUtils.getWakeLockTag;
+
+@Immutable
+@NotNullByDefault
+class AndroidWakeLockFactoryImpl implements AndroidWakeLockFactory {
+
+	private static final long LOCK_DURATION_MS = MINUTES.toMillis(1);
+
+	private final TaskScheduler scheduler;
+	private final Application app;
+	private final PowerManager powerManager;
+
+	@Inject
+	AndroidWakeLockFactoryImpl(TaskScheduler scheduler, Application app) {
+		this.scheduler = scheduler;
+		this.app = app;
+		powerManager = (PowerManager)
+				requireNonNull(app.getSystemService(POWER_SERVICE));
+	}
+
+	@Override
+	public AndroidWakeLock createWakeLock(int levelAndFlags) {
+		String tag = getWakeLockTag(app);
+		return new RenewableWakeLock(powerManager, scheduler, levelAndFlags,
+				tag, LOCK_DURATION_MS, MILLISECONDS);
+	}
+}

bramble-android/src/main/java/org/briarproject/bramble/system/RenewableWakeLock.java

@@ -1,8 +1,9 @@
-package org.briarproject.bramble.util;
+package org.briarproject.bramble.system;
 
 import android.os.PowerManager;
 
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.system.AndroidWakeLock;
 import org.briarproject.bramble.api.system.TaskScheduler;
 
 import java.util.concurrent.Future;
@@ -14,13 +15,14 @@ import javax.annotation.concurrent.ThreadSafe;
 
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
 import static java.util.logging.Level.INFO;
+import static java.util.logging.Logger.getLogger;
 
 @ThreadSafe
 @NotNullByDefault
-public class RenewableWakeLock {
+class RenewableWakeLock implements AndroidWakeLock {
 
 	private static final Logger LOG =
-			Logger.getLogger(RenewableWakeLock.class.getName());
+			getLogger(RenewableWakeLock.class.getName());
 
 	/**
 	 * Automatically release the lock this many milliseconds after it's due
@@ -41,9 +43,8 @@ public class RenewableWakeLock {
 	@Nullable
 	private Future<?> future; // Locking: lock
 
-	public RenewableWakeLock(PowerManager powerManager,
-			TaskScheduler scheduler, int levelAndFlags, String tag,
-			long duration, TimeUnit timeUnit) {
+	RenewableWakeLock(PowerManager powerManager, TaskScheduler scheduler,
+			int levelAndFlags, String tag, long duration, TimeUnit timeUnit) {
 		this.powerManager = powerManager;
 		this.scheduler = scheduler;
 		this.levelAndFlags = levelAndFlags;
@@ -52,6 +53,7 @@ public class RenewableWakeLock {
 		renewTask = this::renew;
 	}
 
+	@Override
 	public void acquire() {
 		if (LOG.isLoggable(INFO)) LOG.info("Acquiring wake lock " + tag);
 		synchronized (lock) {
@@ -82,6 +84,7 @@ public class RenewableWakeLock {
 		}
 	}
 
+	@Override
 	public void release() {
 		if (LOG.isLoggable(INFO)) LOG.info("Releasing wake lock " + tag);
 		synchronized (lock) {

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

@@ -0,0 +1,14 @@
+package org.briarproject.bramble.plugin.bluetooth;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.plugin.duplex.DuplexPlugin;
+import org.briarproject.bramble.api.plugin.duplex.DuplexTransportConnection;
+
+import java.io.IOException;
+
+@NotNullByDefault
+interface BluetoothConnectionFactory<S> {
+
+	DuplexTransportConnection wrapSocket(DuplexPlugin plugin, S socket)
+			throws IOException;
+}

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

@@ -6,7 +6,6 @@ import org.briarproject.bramble.api.Pair;
 import org.briarproject.bramble.api.data.BdfList;
 import org.briarproject.bramble.api.event.Event;
 import org.briarproject.bramble.api.event.EventListener;
-import org.briarproject.bramble.api.io.TimeoutMonitor;
 import org.briarproject.bramble.api.keyagreement.KeyAgreementConnection;
 import org.briarproject.bramble.api.keyagreement.KeyAgreementListener;
 import org.briarproject.bramble.api.keyagreement.event.KeyAgreementListeningEvent;
@@ -70,13 +69,13 @@ import static org.briarproject.bramble.util.StringUtils.macToString;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
-abstract class BluetoothPlugin<SS> implements DuplexPlugin, EventListener {
+abstract class BluetoothPlugin<S, SS> implements DuplexPlugin, EventListener {
 
 	private static final Logger LOG =
 			getLogger(BluetoothPlugin.class.getName());
 
 	final BluetoothConnectionLimiter connectionLimiter;
-	final TimeoutMonitor timeoutMonitor;
+	final BluetoothConnectionFactory<S> connectionFactory;
 
 	private final Executor ioExecutor;
 	private final SecureRandom secureRandom;
@@ -123,11 +122,15 @@ abstract class BluetoothPlugin<SS> implements DuplexPlugin, EventListener {
 	abstract DuplexTransportConnection discoverAndConnect(String uuid);
 
 	BluetoothPlugin(BluetoothConnectionLimiter connectionLimiter,
-			TimeoutMonitor timeoutMonitor, Executor ioExecutor,
-			SecureRandom secureRandom, Backoff backoff,
-			PluginCallback callback, int maxLatency, int maxIdleTime) {
+			BluetoothConnectionFactory<S> connectionFactory,
+			Executor ioExecutor,
+			SecureRandom secureRandom,
+			Backoff backoff,
+			PluginCallback callback,
+			int maxLatency,
+			int maxIdleTime) {
 		this.connectionLimiter = connectionLimiter;
-		this.timeoutMonitor = timeoutMonitor;
+		this.connectionFactory = connectionFactory;
 		this.ioExecutor = ioExecutor;
 		this.secureRandom = secureRandom;
 		this.backoff = backoff;

bramble-java/src/main/java/org/briarproject/bramble/plugin/bluetooth/JavaBluetoothConnectionFactory.java

@@ -0,0 +1,34 @@
+package org.briarproject.bramble.plugin.bluetooth;
+
+import org.briarproject.bramble.api.io.TimeoutMonitor;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.plugin.duplex.DuplexPlugin;
+import org.briarproject.bramble.api.plugin.duplex.DuplexTransportConnection;
+
+import java.io.IOException;
+
+import javax.annotation.concurrent.Immutable;
+import javax.microedition.io.StreamConnection;
+
+@Immutable
+@NotNullByDefault
+class JavaBluetoothConnectionFactory
+		implements BluetoothConnectionFactory<StreamConnection> {
+
+	private final BluetoothConnectionLimiter connectionLimiter;
+	private final TimeoutMonitor timeoutMonitor;
+
+	JavaBluetoothConnectionFactory(
+			BluetoothConnectionLimiter connectionLimiter,
+			TimeoutMonitor timeoutMonitor) {
+		this.connectionLimiter = connectionLimiter;
+		this.timeoutMonitor = timeoutMonitor;
+	}
+
+	@Override
+	public DuplexTransportConnection wrapSocket(DuplexPlugin plugin,
+			StreamConnection socket) throws IOException {
+		return new JavaBluetoothTransportConnection(plugin, connectionLimiter,
+				timeoutMonitor, socket);
+	}
+}

bramble-java/src/main/java/org/briarproject/bramble/plugin/bluetooth/JavaBluetoothPlugin.java

@@ -1,6 +1,5 @@
 package org.briarproject.bramble.plugin.bluetooth;
 
-import org.briarproject.bramble.api.io.TimeoutMonitor;
 import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
 import org.briarproject.bramble.api.plugin.Backoff;
@@ -26,7 +25,8 @@ import static org.briarproject.bramble.util.StringUtils.isValidMac;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
-class JavaBluetoothPlugin extends BluetoothPlugin<StreamConnectionNotifier> {
+class JavaBluetoothPlugin
+		extends BluetoothPlugin<StreamConnection, StreamConnectionNotifier> {
 
 	private static final Logger LOG =
 			getLogger(JavaBluetoothPlugin.class.getName());
@@ -35,10 +35,10 @@ class JavaBluetoothPlugin extends BluetoothPlugin<StreamConnectionNotifier> {
 	private volatile LocalDevice localDevice = null;
 
 	JavaBluetoothPlugin(BluetoothConnectionLimiter connectionManager,
-			TimeoutMonitor timeoutMonitor, Executor ioExecutor,
-			SecureRandom secureRandom, Backoff backoff,
+			BluetoothConnectionFactory<StreamConnection> connectionFactory,
+			Executor ioExecutor, SecureRandom secureRandom, Backoff backoff,
 			PluginCallback callback, int maxLatency, int maxIdleTime) {
-		super(connectionManager, timeoutMonitor, ioExecutor, secureRandom,
+		super(connectionManager, connectionFactory, ioExecutor, secureRandom,
 				backoff, callback, maxLatency, maxIdleTime);
 	}
 
@@ -96,7 +96,7 @@ class JavaBluetoothPlugin extends BluetoothPlugin<StreamConnectionNotifier> {
 	@Override
 	DuplexTransportConnection acceptConnection(StreamConnectionNotifier ss)
 			throws IOException {
-		return wrapSocket(ss.acceptAndOpen());
+		return connectionFactory.wrapSocket(this, ss.acceptAndOpen());
 	}
 
 	@Override
@@ -108,7 +108,8 @@ class JavaBluetoothPlugin extends BluetoothPlugin<StreamConnectionNotifier> {
 	DuplexTransportConnection connectTo(String address, String uuid)
 			throws IOException {
 		String url = makeUrl(address, uuid);
-		return wrapSocket((StreamConnection) Connector.open(url));
+		StreamConnection s = (StreamConnection) Connector.open(url);
+		return connectionFactory.wrapSocket(this, s);
 	}
 
 	@Override
@@ -120,10 +121,4 @@ class JavaBluetoothPlugin extends BluetoothPlugin<StreamConnectionNotifier> {
 	private String makeUrl(String address, String uuid) {
 		return "btspp://" + address + ":" + uuid + ";name=RFCOMM";
 	}
-
-	private DuplexTransportConnection wrapSocket(StreamConnection s)
-			throws IOException {
-		return new JavaBluetoothTransportConnection(this, connectionLimiter,
-				timeoutMonitor, s);
-	}
 }

bramble-java/src/main/java/org/briarproject/bramble/plugin/bluetooth/JavaBluetoothPluginFactory.java

@@ -14,6 +14,7 @@ import java.security.SecureRandom;
 import java.util.concurrent.Executor;
 
 import javax.annotation.concurrent.Immutable;
+import javax.microedition.io.StreamConnection;
 
 import static org.briarproject.bramble.api.plugin.BluetoothConstants.ID;
 
@@ -57,10 +58,13 @@ public class JavaBluetoothPluginFactory implements DuplexPluginFactory {
 	public DuplexPlugin createPlugin(PluginCallback callback) {
 		BluetoothConnectionLimiter connectionLimiter =
 				new BluetoothConnectionLimiterImpl(eventBus);
+		BluetoothConnectionFactory<StreamConnection> connectionFactory =
+				new JavaBluetoothConnectionFactory(connectionLimiter,
+						timeoutMonitor);
 		Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,
 				MAX_POLLING_INTERVAL, BACKOFF_BASE);
 		JavaBluetoothPlugin plugin = new JavaBluetoothPlugin(connectionLimiter,
-				timeoutMonitor, ioExecutor, secureRandom, backoff, callback,
+				connectionFactory, ioExecutor, secureRandom, backoff, callback,
 				MAX_LATENCY, MAX_IDLE_TIME);
 		eventBus.addListener(plugin);
 		return plugin;

bramble-java/src/main/java/org/briarproject/bramble/plugin/bluetooth/JavaBluetoothTransportConnection.java

@@ -16,18 +16,18 @@ class JavaBluetoothTransportConnection
 		extends AbstractDuplexTransportConnection {
 
 	private final BluetoothConnectionLimiter connectionLimiter;
-	private final StreamConnection stream;
+	private final StreamConnection socket;
 	private final InputStream in;
 
 	JavaBluetoothTransportConnection(Plugin plugin,
 			BluetoothConnectionLimiter connectionLimiter,
 			TimeoutMonitor timeoutMonitor,
-			StreamConnection stream) throws IOException {
+			StreamConnection socket) throws IOException {
 		super(plugin);
 		this.connectionLimiter = connectionLimiter;
-		this.stream = stream;
+		this.socket = socket;
 		in = timeoutMonitor.createTimeoutInputStream(
-				stream.openInputStream(), plugin.getMaxIdleTime() * 2);
+				socket.openInputStream(), plugin.getMaxIdleTime() * 2);
 	}
 
 	@Override
@@ -37,13 +37,13 @@ class JavaBluetoothTransportConnection
 
 	@Override
 	protected OutputStream getOutputStream() throws IOException {
-		return stream.openOutputStream();
+		return socket.openOutputStream();
 	}
 
 	@Override
 	protected void closeConnection(boolean exception) throws IOException {
 		try {
-			stream.close();
+			socket.close();
 		} finally {
 			connectionLimiter.connectionClosed(this);
 		}

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

@@ -28,10 +28,10 @@ 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.system.AndroidExecutor;
+import org.briarproject.bramble.api.system.AndroidWakeLockFactory;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.system.LocationUtils;
 import org.briarproject.bramble.api.system.ResourceProvider;
-import org.briarproject.bramble.api.system.TaskScheduler;
 import org.briarproject.bramble.plugin.bluetooth.AndroidBluetoothPluginFactory;
 import org.briarproject.bramble.plugin.tcp.AndroidLanTcpPluginFactory;
 import org.briarproject.bramble.plugin.tor.AndroidTorPluginFactory;
@@ -124,7 +124,6 @@ public class AppModule {
 
 	@Provides
 	PluginConfig providePluginConfig(@IoExecutor Executor ioExecutor,
-			TaskScheduler scheduler,
 			AndroidExecutor androidExecutor,
 			SecureRandom random,
 			SocketFactory torSocketFactory,
@@ -136,16 +135,17 @@ public class AppModule {
 			ResourceProvider resourceProvider,
 			CircumventionProvider circumventionProvider,
 			BatteryManager batteryManager,
+			AndroidWakeLockFactory wakeLockFactory,
 			Clock clock,
 			TimeoutMonitor timeoutMonitor) {
 		Context appContext = app.getApplicationContext();
 		DuplexPluginFactory bluetooth = new AndroidBluetoothPluginFactory(
-				ioExecutor, scheduler, androidExecutor, appContext, random,
-				eventBus, clock, timeoutMonitor, backoffFactory);
+				ioExecutor, androidExecutor, wakeLockFactory, appContext,
+				random, eventBus, clock, timeoutMonitor, backoffFactory);
 		DuplexPluginFactory tor = new AndroidTorPluginFactory(ioExecutor,
-				scheduler, appContext, networkManager, locationUtils, eventBus,
+				appContext, networkManager, locationUtils, eventBus,
 				torSocketFactory, backoffFactory, resourceProvider,
-				circumventionProvider, batteryManager, clock);
+				circumventionProvider, batteryManager, wakeLockFactory, clock);
 		DuplexPluginFactory lan = new AndroidLanTcpPluginFactory(ioExecutor,
 				eventBus, backoffFactory, appContext);
 		Collection<DuplexPluginFactory> duplex = asList(bluetooth, tor, lan);