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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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11
bramble-core/src/main/java/org/briarproject/bramble/plugin/bluetooth/BluetoothConnectionLimiter.java
View File

@@ -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
View File

@@ -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");
}
}
}
}