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New polling logic for Bluetooth. #251

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The polling interval increases exponentially each time polling is unsuccessful, up to a maximum of 60 minutes. The interval is reset to 2 minutes whenever a connection is made and whenever Bluetooth is re-enabled.
This commit is contained in:
akwizgran
2016-02-12 15:40:01 +00:00
parent a774b3419a
commit c081c08ff5
16 changed files with 216 additions and 133 deletions
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22
briar-desktop/src/org/briarproject/plugins/bluetooth/BluetoothPluginFactory.java
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@@ -1,28 +1,34 @@
package org.briarproject.plugins.bluetooth;
import java.security.SecureRandom;
import java.util.concurrent.Executor;
import org.briarproject.api.TransportId;
import org.briarproject.api.plugins.Backoff;
import org.briarproject.api.plugins.BackoffFactory;
import org.briarproject.api.plugins.duplex.DuplexPlugin;
import org.briarproject.api.plugins.duplex.DuplexPluginCallback;
import org.briarproject.api.plugins.duplex.DuplexPluginFactory;
import org.briarproject.api.system.Clock;
import org.briarproject.system.SystemClock;
import java.security.SecureRandom;
import java.util.concurrent.Executor;
public class BluetoothPluginFactory implements DuplexPluginFactory {
private static final int MAX_LATENCY = 30 * 1000; // 30 seconds
private static final int POLLING_INTERVAL = 3 * 60 * 1000; // 3 minutes
private static final int MIN_POLLING_INTERVAL = 2 * 60 * 1000; // 2 minutes
private static final int MAX_POLLING_INTERVAL = 60 * 60 * 1000; // 1 hour
private static final double BACKOFF_BASE = 1.2;
private final Executor ioExecutor;
private final SecureRandom secureRandom;
private final BackoffFactory backoffFactory;
private final Clock clock;
public BluetoothPluginFactory(Executor ioExecutor,
SecureRandom secureRandom) {
SecureRandom secureRandom, BackoffFactory backoffFactory) {
this.ioExecutor = ioExecutor;
this.secureRandom = secureRandom;
this.backoffFactory = backoffFactory;
clock = new SystemClock();
}
@@ -31,7 +37,9 @@ public class BluetoothPluginFactory implements DuplexPluginFactory {
}
public DuplexPlugin createPlugin(DuplexPluginCallback callback) {
return new BluetoothPlugin(ioExecutor, clock, secureRandom, callback,
MAX_LATENCY, POLLING_INTERVAL);
Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,
MAX_POLLING_INTERVAL, BACKOFF_BASE);
return new BluetoothPlugin(ioExecutor, secureRandom, clock, backoff,
callback, MAX_LATENCY);
}
}