Mercury-IM/Smack
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Code Issues Releases Wiki Activity

Convert Connection references to weak references

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If a Manager is strong referenced from a gc root, usually the instances
map, it should not hold itself a strong reference the connection in
order to avoid a cycle that prevents the Connection instance from being
gc'ed.

SMACK-383
This commit is contained in:
Florian Schmaus 2014-02-07 13:17:36 +01:00
parent 666f555733
commit 9c61c6c945
5 changed files with 46 additions and 35 deletions
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12
source/org/jivesoftware/smackx/ping/PingManager.java
View file

@ -16,6 +16,7 @@
package org.jivesoftware.smackx.ping;
import java.lang.ref.WeakReference;
import java.util.Collections;
import java.util.Map;
import java.util.WeakHashMap;
@ -65,7 +66,7 @@ public class PingManager {
});
}
private Connection connection;
private WeakReference<Connection> weakRefConnection;
/**
* Retrieves a {@link PingManager} for the specified {@link Connection}, creating one if it doesn't already
@ -84,8 +85,8 @@ public class PingManager {
return pingManager;
}
private PingManager(Connection con) {
this.connection = con;
private PingManager(Connection connection) {
weakRefConnection = new WeakReference<Connection>(connection);
ServiceDiscoveryManager sdm = ServiceDiscoveryManager.getInstanceFor(connection);
// The ServiceDiscoveryManager was not pre-initialized
@ -101,6 +102,7 @@ public class PingManager {
* Sends a Pong for every Ping
*/
public void processPacket(Packet packet) {
Connection connection = weakRefConnection.get();
IQ pong = IQ.createResultIQ((Ping) packet);
connection.sendPacket(pong);
}
@ -121,7 +123,7 @@ public class PingManager {
*/
public boolean ping(String jid, long pingTimeout) {
Ping ping = new Ping(jid);
Connection connection = weakRefConnection.get();
try {
SyncPacketSend.getReply(connection, ping);
}
@ -151,6 +153,7 @@ public class PingManager {
* @throws XMPPException An XMPP related error occurred during the request
*/
public boolean isPingSupported(String jid) throws XMPPException {
Connection connection = weakRefConnection.get();
DiscoverInfo result = ServiceDiscoveryManager.getInstanceFor(connection).discoverInfo(jid);
return result.containsFeature(Ping.NAMESPACE);
}
@ -165,6 +168,7 @@ public class PingManager {
* @return true if a reply was received from the server, false otherwise.
*/
public boolean pingMyServer() {
Connection connection = weakRefConnection.get();
return ping(connection.getServiceName());
}
}