Mercury-IM/Smack
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Code Issues Releases Wiki Activity

Convert Connection references to weak references

Browse source 
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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7
source/org/jivesoftware/smackx/receipts/DeliveryReceiptManager.java
View file

@ -16,6 +16,7 @@
package org.jivesoftware.smackx.receipts;
import java.lang.ref.WeakReference;
import java.util.Collections;
import java.util.HashSet;
import java.util.Map;
@ -52,7 +53,7 @@ public class DeliveryReceiptManager implements PacketListener {
});
}
private Connection connection;
private WeakReference<Connection> weakRefConnection;
private boolean auto_receipts_enabled = false;
private Set<ReceiptReceivedListener> receiptReceivedListeners = Collections
.synchronizedSet(new HashSet<ReceiptReceivedListener>());
@ -60,7 +61,7 @@ public class DeliveryReceiptManager implements PacketListener {
private DeliveryReceiptManager(Connection connection) {
ServiceDiscoveryManager sdm = ServiceDiscoveryManager.getInstanceFor(connection);
sdm.addFeature(DeliveryReceipt.NAMESPACE);
this.connection = connection;
weakRefConnection = new WeakReference<Connection>(connection);
instances.put(connection, this);
// register listener for delivery receipts and requests
@ -91,6 +92,7 @@ public class DeliveryReceiptManager implements PacketListener {
* @return true if supported
*/
public boolean isSupported(String jid) {
Connection connection = weakRefConnection.get();
try {
DiscoverInfo result =
ServiceDiscoveryManager.getInstanceFor(connection).discoverInfo(jid);
@ -119,6 +121,7 @@ public class DeliveryReceiptManager implements PacketListener {
DeliveryReceiptRequest drr = (DeliveryReceiptRequest)packet.getExtension(
DeliveryReceiptRequest.ELEMENT, DeliveryReceipt.NAMESPACE);
if (drr != null) {
Connection connection = weakRefConnection.get();
Message ack = new Message(packet.getFrom(), Message.Type.normal);
ack.addExtension(new DeliveryReceipt(packet.getPacketID()));
connection.sendPacket(ack);