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SMACK-388

Browse source 
Use ScheduledExecutorService.
Set ping received when pinging another entity.
Refactored PacketListener and ConnectionListeners as anonymous inner-classes

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@13531 b35dd754-fafc-0310-a699-88a17e54d16e
This commit is contained in:
Florian Schmaus 2013-02-27 22:49:04 +00:00 committed by flow
parent c6248ec000
commit 5c6f257027
4 changed files with 153 additions and 176 deletions
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4
build/resources/META-INF/smack-config.xml
View file

@ -31,7 +31,7 @@
<!-- Port of the local Socks5 proxy -->
<packetCollectorSize>10000</packetCollectorSize>
<!-- Default interval in which the Ping Manager sends ping request to the server (30 minutes) -->
<defaultPingInterval>1800000</defaultPingInterval>
<!-- Default interval (seconds) in which the Ping Manager sends ping request to the server (30 minutes) -->
<defaultPingInterval>1800</defaultPingInterval>
</smack>

17
source/org/jivesoftware/smack/SmackConfiguration.java
View file

@ -58,7 +58,10 @@ public final class SmackConfiguration {
private static int localSocks5ProxyPort = 7777;
private static int packetCollectorSize = 5000;
private static int defaultPingInterval = 1800000; // 30 min (30*60*1000)
/**
* defaultPingInterval (in seconds)
*/
private static int defaultPingInterval = 1800; // 30 min (30*60)
private SmackConfiguration() {
}
@ -109,7 +112,7 @@ public final class SmackConfiguration {
else if (parser.getName().equals("packetCollectorSize")) {
packetCollectorSize = parseIntProperty(parser, packetCollectorSize);
}
else if (parser.getName().equals("defaultPingInterval")) {
else if (parser.getName().equals("defaultPingInterval")) {
defaultPingInterval = parseIntProperty(parser, defaultPingInterval);
}
}
@ -308,10 +311,20 @@ public final class SmackConfiguration {
SmackConfiguration.localSocks5ProxyPort = localSocks5ProxyPort;
}
/**
* Returns the default ping interval (seconds)
*
* @return
*/
public static int getDefaultPingInterval() {
return defaultPingInterval;
}
/**
* Sets the default ping interval (seconds). Set it to '-1' to disable the periodic ping
*
* @param defaultPingInterval
*/
public static void setDefaultPingInterval(int defaultPingInterval) {
SmackConfiguration.defaultPingInterval = defaultPingInterval;
}

191
source/org/jivesoftware/smackx/ping/PingManager.java
View file

@ -21,10 +21,14 @@ import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.WeakHashMap;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import org.jivesoftware.smack.AbstractConnectionListener;
import org.jivesoftware.smack.Connection;
import org.jivesoftware.smack.ConnectionCreationListener;
import org.jivesoftware.smack.ConnectionListener;
import org.jivesoftware.smack.PacketCollector;
import org.jivesoftware.smack.PacketListener;
import org.jivesoftware.smack.SmackConfiguration;
@ -51,13 +55,14 @@ import org.jivesoftware.smackx.ping.packet.Pong;
* Ping</a>
*/
public class PingManager {
public static final String NAMESPACE = "urn:xmpp:ping";
public static final String ELEMENT = "ping";
private static Map<Connection, PingManager> instances =
Collections.synchronizedMap(new WeakHashMap<Connection, PingManager>());
static {
Connection.addConnectionCreationListener(new ConnectionCreationListener() {
public void connectionCreated(Connection connection) {
@ -65,49 +70,96 @@ public class PingManager {
}
});
}
private ScheduledExecutorService periodicPingExecutorService;
private Connection connection;
private Thread serverPingThread;
private ServerPingTask serverPingTask;
private int pingInterval = SmackConfiguration.getDefaultPingInterval();
private Set<PingFailedListener> pingFailedListeners = Collections
.synchronizedSet(new HashSet<PingFailedListener>());
private ScheduledFuture<?> periodicPingTask;
protected volatile long lastSuccessfulPingByTask = -1;
// Ping Flood protection
private long pingMinDelta = 100;
private long lastPingStamp = 0; // timestamp of the last received ping
// Last server pong timestamp if a ping request manually
private long lastServerPingStamp = -1;
// Timestamp of the last pong received, either from the server or another entity
// Note, no need to synchronize this value, it will only increase over time
private long lastSuccessfulManualPing = -1;
private PingManager(Connection connection) {
ServiceDiscoveryManager sdm = ServiceDiscoveryManager.getInstanceFor(connection);
sdm.addFeature(NAMESPACE);
this.connection = connection;
PacketFilter pingPacketFilter = new PacketTypeFilter(Ping.class);
connection.addPacketListener(new PingPacketListener(), pingPacketFilter);
connection.addConnectionListener(new PingConnectionListener());
instances.put(connection, this);
maybeStartPingServerTask();
init();
}
private void init() {
periodicPingExecutorService = new ScheduledThreadPoolExecutor(1);
PacketFilter pingPacketFilter = new PacketTypeFilter(Ping.class);
connection.addPacketListener(new PacketListener() {
/**
* Sends a Pong for every Ping
*/
public void processPacket(Packet packet) {
if (pingMinDelta > 0) {
// Ping flood protection enabled
long currentMillies = System.currentTimeMillis();
long delta = currentMillies - lastPingStamp;
lastPingStamp = currentMillies;
if (delta < pingMinDelta) {
return;
}
}
Pong pong = new Pong((Ping)packet);
connection.sendPacket(pong);
}
}
, pingPacketFilter);
connection.addConnectionListener(new ConnectionListener() {
@Override
public void connectionClosed() {
maybeStopPingServerTask();
}
@Override
public void connectionClosedOnError(Exception arg0) {
maybeStopPingServerTask();
}
@Override
public void reconnectionSuccessful() {
maybeSchedulePingServerTask();
}
@Override
public void reconnectingIn(int seconds) {
}
@Override
public void reconnectionFailed(Exception e) {
}
});
instances.put(connection, this);
maybeSchedulePingServerTask();
}
public static PingManager getInstanceFor(Connection connection) {
PingManager pingManager = instances.get(connection);
if (pingManager == null) {
pingManager = new PingManager(connection);
}
return pingManager;
}
public void setPingIntervall(int pingIntervall) {
this.pingInterval = pingIntervall;
if (serverPingTask != null) {
serverPingTask.setPingInterval(pingIntervall);
}
}
public int getPingIntervall() {
return pingInterval;
}
@ -189,11 +241,11 @@ public class PingManager {
*/
public boolean pingEntity(String jid, long pingTimeout) {
IQ result = ping(jid, pingTimeout);
if (result == null
|| result.getType() == IQ.Type.ERROR) {
if (result == null || result.getType() == IQ.Type.ERROR) {
return false;
}
}
pongReceived();
return true;
}
@ -218,7 +270,8 @@ public class PingManager {
}
return false;
}
lastServerPingStamp = System.currentTimeMillis();
// Maybe not really a pong, but an answer is an answer
pongReceived();
return true;
}
@ -257,80 +310,34 @@ public class PingManager {
* @return
*/
public long getLastSuccessfulPing() {
long taskLastSuccessfulPing = -1;
if (serverPingTask != null) {
taskLastSuccessfulPing = serverPingTask.getLastSucessfulPing();
}
return Math.max(taskLastSuccessfulPing, lastServerPingStamp);
return Math.max(lastSuccessfulPingByTask, lastSuccessfulManualPing);
}
protected Set<PingFailedListener> getPingFailedListeners() {
return pingFailedListeners;
}
private class PingConnectionListener extends AbstractConnectionListener {
@Override
public void connectionClosed() {
maybeStopPingServerTask();
}
@Override
public void connectionClosedOnError(Exception arg0) {
maybeStopPingServerTask();
}
@Override
public void reconnectionSuccessful() {
maybeStartPingServerTask();
}
}
private void maybeStartPingServerTask() {
if (serverPingTask != null) {
serverPingTask.setDone();
serverPingThread.interrupt();
serverPingTask = null;
serverPingThread = null;
}
/**
* Cancels any existing periodic ping task if there is one and schedules a new ping task if pingInterval is greater
* then zero.
*
*/
protected synchronized void maybeSchedulePingServerTask() {
maybeStopPingServerTask();
if (pingInterval > 0) {
serverPingTask = new ServerPingTask(connection, pingInterval);
serverPingThread = new Thread(serverPingTask);
serverPingThread.setDaemon(true);
serverPingThread.setName("Smack Ping Server Task (" + connection.getServiceName() + ")");
serverPingThread.start();
periodicPingTask = periodicPingExecutorService.schedule(new ServerPingTask(connection), pingInterval,
TimeUnit.SECONDS);
}
}
private void maybeStopPingServerTask() {
if (serverPingThread != null) {
serverPingTask.setDone();
serverPingThread.interrupt();
if (periodicPingTask != null) {
periodicPingTask.cancel(true);
periodicPingTask = null;
}
}
private class PingPacketListener implements PacketListener {
public PingPacketListener() {
}
/**
* Sends a Pong for every Ping
*/
public void processPacket(Packet packet) {
if (pingMinDelta > 0) {
// Ping flood protection enabled
long currentMillies = System.currentTimeMillis();
long delta = currentMillies - lastPingStamp;
lastPingStamp = currentMillies;
if (delta < pingMinDelta) {
return;
}
}
Pong pong = new Pong((Ping)packet);
connection.sendPacket(pong);
}
private void pongReceived() {
lastSuccessfulManualPing = System.currentTimeMillis();
}
}

117
source/org/jivesoftware/smackx/ping/ServerPingTask.java
View file

@ -1,5 +1,5 @@
/**
* Copyright 2012 Florian Schmaus
* Copyright 2012-2013 Florian Schmaus
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -22,99 +22,56 @@ import java.util.Set;
import org.jivesoftware.smack.Connection;
class ServerPingTask implements Runnable {
// This has to be a weak reference because IIRC all threads are roots
// for objects and we have a new thread here that should hold a strong
// reference to connection so that it can be GCed.
private WeakReference<Connection> weakConnection;
private int pingInterval;
private volatile long lastSuccessfulPing = -1;
private int delta = 1000; // 1 seconds
private int tries = 3; // 3 tries
protected ServerPingTask(Connection connection, int pingIntervall) {
protected ServerPingTask(Connection connection) {
this.weakConnection = new WeakReference<Connection>(connection);
this.pingInterval = pingIntervall;
}
protected void setDone() {
this.pingInterval = -1;
}
protected void setPingInterval(int pingIntervall) {
this.pingInterval = pingIntervall;
}
protected int getIntInterval() {
return pingInterval;
}
protected long getLastSucessfulPing() {
return lastSuccessfulPing;
}
public void run() {
sleep(60000);
outerLoop:
while(pingInterval > 0) {
Connection connection = weakConnection.get();
if (connection == null) {
// connection has been collected by GC
// which means we can stop the thread by breaking the loop
break;
}
if (connection.isAuthenticated()) {
PingManager pingManager = PingManager.getInstanceFor(connection);
boolean res = false;
for(int i = 0; i < tries; i++) {
if (i != 0) {
try {
Thread.sleep(delta);
} catch (InterruptedException e) {
// We received an interrupt
// This only happens if we should stop pinging
break outerLoop;
}
}
res = pingManager.pingMyServer();
// stop when we receive a pong back
if (res) {
lastSuccessfulPing = System.currentTimeMillis();
break;
Connection connection = weakConnection.get();
if (connection == null) {
// connection has been collected by GC
// which means we can stop the thread by breaking the loop
return;
}
if (connection.isAuthenticated()) {
PingManager pingManager = PingManager.getInstanceFor(connection);
boolean res = false;
for (int i = 0; i < tries; i++) {
if (i != 0) {
try {
Thread.sleep(delta);
} catch (InterruptedException e) {
// We received an interrupt
// This only happens if we should stop pinging
return;
}
}
if (!res) {
Set<PingFailedListener> pingFailedListeners = pingManager.getPingFailedListeners();
for (PingFailedListener l : pingFailedListeners) {
l.pingFailed();
}
res = pingManager.pingMyServer();
// stop when we receive a pong back
if (res) {
pingManager.lastSuccessfulPingByTask = System.currentTimeMillis();
break;
}
}
sleep();
}
}
/*
* If pingInterval > 0 sleeps a minimum of pingInterval
*/
private void sleep(int extraSleepTime) {
int totalSleep = pingInterval + extraSleepTime;
if (totalSleep > 0) {
try {
Thread.sleep(totalSleep);
} catch (InterruptedException e) {
/* Ignore */
if (!res) {
Set<PingFailedListener> pingFailedListeners = pingManager.getPingFailedListeners();
for (PingFailedListener l : pingFailedListeners) {
l.pingFailed();
}
} else {
// Ping was successful, wind-up the periodic task again
pingManager.maybeSchedulePingServerTask();
}
}
}
/**
* Sleeps the amount of pingInterval
*/
private void sleep() {
sleep(0);
}
}