2013-01-04 12:43:35 +01:00
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/**
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2014-02-17 18:57:38 +01:00
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*
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2014-02-23 21:36:57 +01:00
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* Copyright 2012-2014 Florian Schmaus
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2013-01-04 12:43:35 +01:00
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*
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2014-02-17 18:57:38 +01:00
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* Licensed under the Apache License, Version 2.0 (the "License");
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2013-01-04 12:43:35 +01:00
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.ping;
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2013-04-16 03:39:17 +02:00
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import java.util.Collections;
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2014-02-23 21:36:57 +01:00
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import java.util.HashSet;
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2013-04-16 03:39:17 +02:00
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import java.util.Map;
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2014-02-23 21:36:57 +01:00
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import java.util.Set;
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2013-04-16 03:39:17 +02:00
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import java.util.WeakHashMap;
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2014-02-23 21:36:57 +01:00
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import java.util.concurrent.ScheduledFuture;
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import java.util.concurrent.TimeUnit;
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2014-03-12 11:50:05 +01:00
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import java.util.logging.Level;
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2014-02-23 21:36:57 +01:00
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import java.util.logging.Logger;
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2013-04-16 03:39:17 +02:00
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2014-03-14 01:48:33 +01:00
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import org.jivesoftware.smack.AbstractConnectionListener;
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2014-03-12 11:50:05 +01:00
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import org.jivesoftware.smack.SmackException;
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import org.jivesoftware.smack.SmackException.NoResponseException;
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2014-03-10 09:45:50 +01:00
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import org.jivesoftware.smack.XMPPConnection;
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2013-04-16 03:39:17 +02:00
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import org.jivesoftware.smack.ConnectionCreationListener;
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2014-03-09 11:19:44 +01:00
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import org.jivesoftware.smack.Manager;
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2013-04-16 03:39:17 +02:00
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import org.jivesoftware.smack.PacketListener;
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2013-01-04 12:43:35 +01:00
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import org.jivesoftware.smack.XMPPException;
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2014-03-12 11:50:05 +01:00
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import org.jivesoftware.smack.XMPPException.XMPPErrorException;
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2013-04-16 03:39:17 +02:00
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import org.jivesoftware.smack.filter.AndFilter;
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import org.jivesoftware.smack.filter.IQTypeFilter;
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import org.jivesoftware.smack.filter.PacketFilter;
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import org.jivesoftware.smack.filter.PacketTypeFilter;
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import org.jivesoftware.smack.packet.Packet;
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import org.jivesoftware.smack.packet.IQ.Type;
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2014-02-15 11:35:08 +01:00
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import org.jivesoftware.smackx.disco.ServiceDiscoveryManager;
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2014-02-14 18:13:51 +01:00
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import org.jivesoftware.smackx.ping.packet.Ping;
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2014-02-23 21:36:57 +01:00
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import org.jivesoftware.smackx.ping.packet.Pong;
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2013-01-04 12:43:35 +01:00
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/**
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2014-02-23 21:36:57 +01:00
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* Implements the XMPP Ping as defined by XEP-0199. The XMPP Ping protocol allows one entity to
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* ping any other entity by simply sending a ping to the appropriate JID. PingManger also
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* periodically sends XMPP pings to the server every 30 minutes to avoid NAT timeouts and to test
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* the connection status.
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2013-01-04 12:43:35 +01:00
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*
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* @author Florian Schmaus
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2014-02-23 21:36:57 +01:00
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* @see <a href="http://www.xmpp.org/extensions/xep-0199.html">XEP-0199:XMPP Ping</a>
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2013-01-04 12:43:35 +01:00
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*/
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2014-03-09 11:19:44 +01:00
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public class PingManager extends Manager {
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2014-02-23 21:36:57 +01:00
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public static final String NAMESPACE = "urn:xmpp:ping";
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private static final Logger LOGGER = Logger.getLogger(PingManager.class.getName());
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2014-03-10 09:45:50 +01:00
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private static final Map<XMPPConnection, PingManager> INSTANCES = Collections
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.synchronizedMap(new WeakHashMap<XMPPConnection, PingManager>());
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2014-02-23 21:36:57 +01:00
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private static final PacketFilter PING_PACKET_FILTER = new AndFilter(
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new PacketTypeFilter(Ping.class), new IQTypeFilter(Type.GET));
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2013-04-16 03:39:17 +02:00
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static {
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2014-03-10 09:45:50 +01:00
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XMPPConnection.addConnectionCreationListener(new ConnectionCreationListener() {
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public void connectionCreated(XMPPConnection connection) {
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2013-11-03 22:49:58 +01:00
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getInstanceFor(connection);
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2013-04-16 03:39:17 +02:00
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}
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});
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}
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/**
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2014-03-10 09:45:50 +01:00
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* Retrieves a {@link PingManager} for the specified {@link XMPPConnection}, creating one if it doesn't already
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2013-04-16 03:39:17 +02:00
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* exist.
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*
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* @param connection
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* The connection the manager is attached to.
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* @return The new or existing manager.
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*/
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2014-03-10 09:45:50 +01:00
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public synchronized static PingManager getInstanceFor(XMPPConnection connection) {
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2014-02-23 21:36:57 +01:00
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PingManager pingManager = INSTANCES.get(connection);
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2013-04-16 03:39:17 +02:00
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if (pingManager == null) {
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pingManager = new PingManager(connection);
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}
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return pingManager;
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}
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2014-02-23 21:36:57 +01:00
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private static int defaultPingInterval = 60 * 30;
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/**
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* Set the default ping interval which will be used for new connections.
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*
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* @param interval the interval in seconds
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*/
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public static void setDefaultPingInterval(int interval) {
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defaultPingInterval = interval;
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}
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private final Set<PingFailedListener> pingFailedListeners = Collections
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.synchronizedSet(new HashSet<PingFailedListener>());
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/**
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* The interval in seconds between pings are send to the users server.
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*/
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private int pingInterval = defaultPingInterval;
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/**
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* The time in milliseconds the last successful ping was send to the users server.
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*/
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private volatile long lastSuccessfulAutomaticPing = -1;
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private ScheduledFuture<?> nextAutomaticPing;
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/**
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* The time in milliseconds the last manual ping as successful.
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*/
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private long lastSuccessfulManualPing = -1;
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2014-03-10 09:45:50 +01:00
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private PingManager(XMPPConnection connection) {
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2014-03-09 11:19:44 +01:00
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super(connection);
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2013-01-04 12:43:35 +01:00
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ServiceDiscoveryManager sdm = ServiceDiscoveryManager.getInstanceFor(connection);
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2014-02-23 21:36:57 +01:00
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sdm.addFeature(PingManager.NAMESPACE);
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INSTANCES.put(connection, this);
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2013-04-16 03:39:17 +02:00
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connection.addPacketListener(new PacketListener() {
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2014-02-23 21:36:57 +01:00
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// Send a Pong for every Ping
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@Override
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2013-04-16 03:39:17 +02:00
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public void processPacket(Packet packet) {
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2014-02-23 21:36:57 +01:00
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Pong pong = new Pong(packet);
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2014-03-09 11:19:44 +01:00
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connection().sendPacket(pong);
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2013-04-16 03:39:17 +02:00
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}
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2014-02-23 21:36:57 +01:00
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}, PING_PACKET_FILTER);
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2014-03-14 01:48:33 +01:00
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connection.addConnectionListener(new AbstractConnectionListener() {
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@Override
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public void authenticated(XMPPConnection connection) {
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maybeSchedulePingServerTask();
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}
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2014-02-23 21:36:57 +01:00
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@Override
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public void connectionClosed() {
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maybeStopPingServerTask();
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}
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@Override
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public void connectionClosedOnError(Exception arg0) {
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maybeStopPingServerTask();
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}
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});
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maybeSchedulePingServerTask();
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2013-01-04 12:43:35 +01:00
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}
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2013-02-27 23:49:04 +01:00
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2013-01-04 12:43:35 +01:00
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/**
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2013-03-23 12:59:08 +01:00
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* Pings the given jid. This method will return false if an error occurs. The exception
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* to this, is a server ping, which will always return true if the server is reachable,
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* event if there is an error on the ping itself (i.e. ping not supported).
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2013-03-19 03:37:36 +01:00
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* <p>
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* Use {@link #isPingSupported(String)} to determine if XMPP Ping is supported
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2013-01-04 12:43:35 +01:00
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* by the entity.
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*
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2013-03-19 03:37:36 +01:00
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* @param jid The id of the entity the ping is being sent to
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* @param pingTimeout The time to wait for a reply
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* @return true if a reply was received from the entity, false otherwise.
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2014-03-12 11:50:05 +01:00
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* @throws NoResponseException if there was no response from the server.
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2013-01-04 12:43:35 +01:00
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*/
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2014-03-12 11:50:05 +01:00
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public boolean ping(String jid, long pingTimeout) throws NoResponseException {
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2013-03-19 03:37:36 +01:00
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Ping ping = new Ping(jid);
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try {
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2014-03-09 11:19:44 +01:00
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connection().createPacketCollectorAndSend(ping).nextResultOrThrow();
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2013-02-27 23:49:04 +01:00
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}
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2013-03-19 03:37:36 +01:00
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catch (XMPPException exc) {
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2014-03-12 11:50:05 +01:00
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return jid.equals(connection().getServiceName());
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2013-01-04 12:43:35 +01:00
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}
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return true;
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}
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2014-02-23 21:36:57 +01:00
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2013-01-04 12:43:35 +01:00
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/**
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2013-03-19 03:37:36 +01:00
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* Same as calling {@link #ping(String, long)} with the defaultpacket reply
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* timeout.
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2013-01-04 12:43:35 +01:00
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*
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2013-03-19 03:37:36 +01:00
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* @param jid The id of the entity the ping is being sent to
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* @return true if a reply was received from the entity, false otherwise.
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2014-03-12 11:50:05 +01:00
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* @throws SmackException if there was no response from the server.
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2013-01-04 12:43:35 +01:00
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*/
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2014-03-12 11:50:05 +01:00
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public boolean ping(String jid) throws SmackException {
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2014-03-09 11:19:44 +01:00
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return ping(jid, connection().getPacketReplyTimeout());
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2013-01-04 12:43:35 +01:00
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}
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2014-02-23 21:36:57 +01:00
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2013-02-27 23:49:04 +01:00
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/**
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2013-03-19 03:37:36 +01:00
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* Query the specified entity to see if it supports the Ping protocol (XEP-0199)
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2013-02-27 23:49:04 +01:00
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*
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2013-03-19 03:37:36 +01:00
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* @param jid The id of the entity the query is being sent to
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* @return true if it supports ping, false otherwise.
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2014-03-12 11:50:05 +01:00
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* @throws XMPPErrorException An XMPP related error occurred during the request
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* @throws NoResponseException if there was no response from the server.
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2013-02-27 23:49:04 +01:00
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*/
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2014-03-12 11:50:05 +01:00
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public boolean isPingSupported(String jid) throws NoResponseException, XMPPErrorException {
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2014-03-09 11:19:44 +01:00
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return ServiceDiscoveryManager.getInstanceFor(connection()).supportsFeature(jid, PingManager.NAMESPACE);
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2013-01-04 12:43:35 +01:00
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}
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2013-03-23 12:59:08 +01:00
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/**
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* Pings the server. This method will return true if the server is reachable. It
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* is the equivalent of calling <code>ping</code> with the XMPP domain.
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* <p>
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* Unlike the {@link #ping(String)} case, this method will return true even if
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* {@link #isPingSupported(String)} is false.
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*
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* @return true if a reply was received from the server, false otherwise.
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2014-03-12 11:50:05 +01:00
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* @throws SmackException if there was no response from the server.
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2013-03-23 12:59:08 +01:00
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*/
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2014-03-12 11:50:05 +01:00
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public boolean pingMyServer() throws SmackException {
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2014-03-01 15:29:35 +01:00
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return pingMyServer(true);
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}
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/**
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* Pings the server. This method will return true if the server is reachable. It
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* is the equivalent of calling <code>ping</code> with the XMPP domain.
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* <p>
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* Unlike the {@link #ping(String)} case, this method will return true even if
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* {@link #isPingSupported(String)} is false.
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*
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* @param notifyListeners Notify the PingFailedListener in case of error if true
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2014-03-10 18:31:45 +01:00
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* @return true if the user's server could be pinged.
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2014-03-12 11:50:05 +01:00
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* @throws SmackException if there was no response from the server.
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2014-03-01 15:29:35 +01:00
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*/
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2014-03-12 11:50:05 +01:00
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public boolean pingMyServer(boolean notifyListeners) throws SmackException {
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2014-03-09 11:19:44 +01:00
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boolean res = ping(connection().getServiceName());
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2014-03-01 15:29:35 +01:00
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if (res) {
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pongReceived();
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} else if (notifyListeners) {
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2014-02-23 21:36:57 +01:00
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for (PingFailedListener l : pingFailedListeners)
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l.pingFailed();
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}
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return res;
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2013-03-23 12:59:08 +01:00
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}
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2014-02-23 21:36:57 +01:00
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/**
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* Set the interval between the server is automatic pinged. A negative value disables automatic server pings.
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*
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* @param pingInterval the interval between the ping
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*/
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public void setPingInterval(int pingInterval) {
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this.pingInterval = pingInterval;
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maybeSchedulePingServerTask();
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}
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/**
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* Get the current ping interval.
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*
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* @return the interval between pings in seconds
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*/
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public int getPingInterval() {
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return pingInterval;
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}
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/**
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* Register a new PingFailedListener
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*
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* @param listener the listener to invoke
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*/
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public void registerPingFailedListener(PingFailedListener listener) {
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pingFailedListeners.add(listener);
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}
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/**
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* Unregister a PingFailedListener
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*
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* @param listener the listener to remove
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*/
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public void unregisterPingFailedListener(PingFailedListener listener) {
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pingFailedListeners.remove(listener);
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}
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/**
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* Returns the time of the last successful Ping with the
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* users server. If there was no successful Ping (e.g. because this
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* feature is disabled) -1 will be returned.
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*
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2014-03-10 18:31:45 +01:00
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* @return the timestamp of the last successful ping.
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2014-02-23 21:36:57 +01:00
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*/
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public long getLastSuccessfulPing() {
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return Math.max(lastSuccessfulAutomaticPing, lastSuccessfulManualPing);
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}
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/**
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* Cancels any existing periodic ping task if there is one and schedules a new ping task if
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* pingInterval is greater then zero.
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*/
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private synchronized void maybeSchedulePingServerTask() {
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|
|
maybeStopPingServerTask();
|
|
|
|
if (pingInterval > 0) {
|
|
|
|
LOGGER.fine("Scheduling ServerPingTask in " + pingInterval + " seconds");
|
2014-03-09 11:19:44 +01:00
|
|
|
nextAutomaticPing = connection().schedule(pingServerRunnable, pingInterval, TimeUnit.SECONDS);
|
2014-02-23 21:36:57 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
private void maybeStopPingServerTask() {
|
|
|
|
if (nextAutomaticPing != null) {
|
|
|
|
nextAutomaticPing.cancel(true);
|
|
|
|
nextAutomaticPing = null;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
private void pongReceived() {
|
|
|
|
lastSuccessfulManualPing = System.currentTimeMillis();
|
|
|
|
}
|
|
|
|
|
|
|
|
private final Runnable pingServerRunnable = new Runnable() {
|
|
|
|
private static final int DELTA = 1000; // 1 seconds
|
|
|
|
private static final int TRIES = 3; // 3 tries
|
|
|
|
|
|
|
|
public void run() {
|
|
|
|
LOGGER.fine("ServerPingTask run()");
|
2014-03-10 09:45:50 +01:00
|
|
|
XMPPConnection connection = connection();
|
2014-02-23 21:36:57 +01:00
|
|
|
if (connection == null) {
|
|
|
|
// connection has been collected by GC
|
|
|
|
// which means we can stop the thread by breaking the loop
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (connection.isAuthenticated()) {
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
}
|
2014-03-12 11:50:05 +01:00
|
|
|
try {
|
|
|
|
res = pingMyServer(false);
|
|
|
|
}
|
|
|
|
catch (SmackException e) {
|
|
|
|
LOGGER.log(Level.WARNING, "SmackError while pinging server", e);
|
|
|
|
res = false;
|
|
|
|
}
|
2014-02-23 21:36:57 +01:00
|
|
|
// stop when we receive a pong back
|
|
|
|
if (res) {
|
|
|
|
lastSuccessfulAutomaticPing = System.currentTimeMillis();
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
LOGGER.fine("ServerPingTask res=" + res);
|
|
|
|
if (!res) {
|
|
|
|
for (PingFailedListener l : pingFailedListeners) {
|
|
|
|
l.pingFailed();
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
// Ping was successful, wind-up the periodic task again
|
|
|
|
maybeSchedulePingServerTask();
|
|
|
|
}
|
|
|
|
} else {
|
2014-03-10 09:45:50 +01:00
|
|
|
LOGGER.warning("ServerPingTask: XMPPConnection was not authenticated");
|
2014-02-23 21:36:57 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
};
|
2013-01-04 12:43:35 +01:00
|
|
|
}
|