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Code Issues Projects Releases Wiki Activity

Count stable connections, but don't impose a connection limit.

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This commit is contained in:
akwizgran
2020-06-04 11:16:05 +01:00
parent 648f26542c
commit 6dcad6c425
7 changed files with 47 additions and 10 deletions
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2
bramble-android/src/main/java/org/briarproject/bramble/plugin/bluetooth/AndroidBluetoothPluginFactory.java
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@@ -67,7 +67,7 @@ public class AndroidBluetoothPluginFactory implements DuplexPluginFactory {
@Override
public DuplexPlugin createPlugin(PluginCallback callback) {
BluetoothConnectionLimiter connectionLimiter =
new BluetoothConnectionLimiterImpl(eventBus);
new BluetoothConnectionLimiterImpl(eventBus, clock);
Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,
MAX_POLLING_INTERVAL, BACKOFF_BASE);
AndroidBluetoothPlugin plugin = new AndroidBluetoothPlugin(

2
bramble-android/src/main/java/org/briarproject/bramble/plugin/bluetooth/AndroidBluetoothTransportConnection.java
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@@ -50,7 +50,7 @@ class AndroidBluetoothTransportConnection
try {
socket.close();
} finally {
connectionLimiter.connectionClosed(this);
connectionLimiter.connectionClosed(this, exception);
}
}
}

11
bramble-core/src/main/java/org/briarproject/bramble/plugin/bluetooth/BluetoothConnectionLimiter.java
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@@ -3,9 +3,16 @@ package org.briarproject.bramble.plugin.bluetooth;
import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
import org.briarproject.bramble.api.plugin.duplex.DuplexTransportConnection;
import static java.util.concurrent.TimeUnit.SECONDS;
@NotNullByDefault
interface BluetoothConnectionLimiter {
/**
* How long a connection must remain open before it's considered stable.
*/
long STABILITY_PERIOD_MS = SECONDS.toMillis(90);
/**
* Informs the limiter that key agreement has started.
*/
@@ -29,8 +36,10 @@ interface BluetoothConnectionLimiter {
/**
* Informs the limiter that the given connection has been closed.
*
* @param exception True if the connection was closed due to an exception.
*/
void connectionClosed(DuplexTransportConnection conn);
void connectionClosed(DuplexTransportConnection conn, boolean exception);
/**
* Informs the limiter that all connections have been closed.

27
bramble-core/src/main/java/org/briarproject/bramble/plugin/bluetooth/BluetoothConnectionLimiterImpl.java
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@@ -4,6 +4,7 @@ import org.briarproject.bramble.api.event.EventBus;
import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
import org.briarproject.bramble.api.plugin.duplex.DuplexTransportConnection;
import org.briarproject.bramble.api.sync.event.CloseSyncConnectionsEvent;
import org.briarproject.bramble.api.system.Clock;
import java.util.LinkedList;
import java.util.List;
@@ -24,6 +25,7 @@ class BluetoothConnectionLimiterImpl implements BluetoothConnectionLimiter {
getLogger(BluetoothConnectionLimiterImpl.class.getName());
private final EventBus eventBus;
private final Clock clock;
private final Object lock = new Object();
@GuardedBy("lock")
@@ -31,9 +33,12 @@ class BluetoothConnectionLimiterImpl implements BluetoothConnectionLimiter {
new LinkedList<>();
@GuardedBy("lock")
private boolean keyAgreementInProgress = false;
@GuardedBy("lock")
private long timeOfLastChange = 0;
BluetoothConnectionLimiterImpl(EventBus eventBus) {
BluetoothConnectionLimiterImpl(EventBus eventBus, Clock clock) {
this.eventBus = eventBus;
this.clock = clock;
}
@Override
@@ -69,7 +74,10 @@ class BluetoothConnectionLimiterImpl implements BluetoothConnectionLimiter {
@Override
public void connectionOpened(DuplexTransportConnection conn) {
synchronized (lock) {
long now = clock.currentTimeMillis();
countStableConnections(now);
connections.add(conn);
timeOfLastChange = now;
if (LOG.isLoggable(INFO)) {
LOG.info("Connection opened, " + connections.size() + " open");
}
@@ -77,9 +85,13 @@ class BluetoothConnectionLimiterImpl implements BluetoothConnectionLimiter {
}
@Override
public void connectionClosed(DuplexTransportConnection conn) {
public void connectionClosed(DuplexTransportConnection conn,
boolean exception) {
synchronized (lock) {
long now = clock.currentTimeMillis();
if (!exception) countStableConnections(now);
connections.remove(conn);
timeOfLastChange = now;
if (LOG.isLoggable(INFO)) {
LOG.info("Connection closed, " + connections.size() + " open");
}
@@ -89,8 +101,19 @@ class BluetoothConnectionLimiterImpl implements BluetoothConnectionLimiter {
@Override
public void allConnectionsClosed() {
synchronized (lock) {
long now = clock.currentTimeMillis();
countStableConnections(now);
connections.clear();
timeOfLastChange = now;
LOG.info("All connections closed");
}
}
private void countStableConnections(long now) {
if (now - timeOfLastChange >= STABILITY_PERIOD_MS) {
if (LOG.isLoggable(INFO)) {
LOG.info(connections.size() + " connections are stable");
}
}
}
}

6
bramble-java/src/main/java/org/briarproject/bramble/plugin/DesktopPluginModule.java
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@@ -13,6 +13,7 @@ import org.briarproject.bramble.api.plugin.TransportId;
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.api.system.Clock;
import org.briarproject.bramble.plugin.bluetooth.JavaBluetoothPluginFactory;
import org.briarproject.bramble.plugin.modem.ModemPluginFactory;
import org.briarproject.bramble.plugin.tcp.LanTcpPluginFactory;
@@ -39,10 +40,11 @@ public class DesktopPluginModule extends PluginModule {
PluginConfig getPluginConfig(@IoExecutor Executor ioExecutor,
SecureRandom random, BackoffFactory backoffFactory,
ReliabilityLayerFactory reliabilityFactory,
ShutdownManager shutdownManager, EventBus eventBus,
ShutdownManager shutdownManager, EventBus eventBus, Clock clock,
TimeoutMonitor timeoutMonitor) {
DuplexPluginFactory bluetooth = new JavaBluetoothPluginFactory(
ioExecutor, random, eventBus, timeoutMonitor, backoffFactory);
ioExecutor, random, eventBus, clock, timeoutMonitor,
backoffFactory);
DuplexPluginFactory modem = new ModemPluginFactory(ioExecutor,
reliabilityFactory);
DuplexPluginFactory lan = new LanTcpPluginFactory(ioExecutor,

7
bramble-java/src/main/java/org/briarproject/bramble/plugin/bluetooth/JavaBluetoothPluginFactory.java
View File

@@ -9,6 +9,7 @@ import org.briarproject.bramble.api.plugin.PluginCallback;
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.Clock;
import java.security.SecureRandom;
import java.util.concurrent.Executor;
@@ -30,15 +31,17 @@ public class JavaBluetoothPluginFactory implements DuplexPluginFactory {
private final Executor ioExecutor;
private final SecureRandom secureRandom;
private final EventBus eventBus;
private final Clock clock;
private final TimeoutMonitor timeoutMonitor;
private final BackoffFactory backoffFactory;
public JavaBluetoothPluginFactory(Executor ioExecutor,
SecureRandom secureRandom, EventBus eventBus,
SecureRandom secureRandom, EventBus eventBus, Clock clock,
TimeoutMonitor timeoutMonitor, BackoffFactory backoffFactory) {
this.ioExecutor = ioExecutor;
this.secureRandom = secureRandom;
this.eventBus = eventBus;
this.clock = clock;
this.timeoutMonitor = timeoutMonitor;
this.backoffFactory = backoffFactory;
}
@@ -56,7 +59,7 @@ public class JavaBluetoothPluginFactory implements DuplexPluginFactory {
@Override
public DuplexPlugin createPlugin(PluginCallback callback) {
BluetoothConnectionLimiter connectionLimiter =
new BluetoothConnectionLimiterImpl(eventBus);
new BluetoothConnectionLimiterImpl(eventBus, clock);
Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,
MAX_POLLING_INTERVAL, BACKOFF_BASE);
JavaBluetoothPlugin plugin = new JavaBluetoothPlugin(connectionLimiter,

2
bramble-java/src/main/java/org/briarproject/bramble/plugin/bluetooth/JavaBluetoothTransportConnection.java
View File

@@ -45,7 +45,7 @@ class JavaBluetoothTransportConnection
try {
stream.close();
} finally {
connectionLimiter.connectionClosed(this);
connectionLimiter.connectionClosed(this, exception);
}
}
}