OF-205: Prevent recursion when canceling subscriptions across cluster members

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/branches/pubsub_clustering@13278 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/openfire/pubsub/Node.java

@@ -30,6 +30,7 @@ import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.CopyOnWriteArrayList;
 
 import org.dom4j.Element;
+import org.jivesoftware.openfire.cluster.ClusterManager;
 import org.jivesoftware.openfire.pubsub.cluster.CancelSubscriptionTask;
 import org.jivesoftware.openfire.pubsub.cluster.ModifySubscriptionTask;
 import org.jivesoftware.openfire.pubsub.cluster.NewSubscriptionTask;
@@ -2097,8 +2098,9 @@ public abstract class Node {
      * remove the existing affiliation too.
      *
      * @param subscription the subscription to cancel.
+     * @param sendToCluster True to forward cancel order to cluster peers
      */
-    public void cancelSubscription(NodeSubscription subscription) {
+    public void cancelSubscription(NodeSubscription subscription, boolean sendToCluster) {
         // Remove subscription from memory
         subscriptionsByID.remove(subscription.getID());
         subscriptionsByJID.remove(subscription.getJID().toString());
@@ -2113,7 +2115,9 @@ public abstract class Node {
             // Remove the subscription from the database
             PubSubPersistenceManager.removeSubscription(subscription);
         }
+        if (sendToCluster) {
             CacheFactory.doClusterTask(new CancelSubscriptionTask(subscription));
+        }
 
         // Check if we need to unsubscribe from the presence of the owner
         if (isPresenceBasedDelivery() && getSubscriptions(subscription.getOwner()).isEmpty()) {
@@ -2121,6 +2125,17 @@ public abstract class Node {
         }
     }
 
+    /**
+     * Cancels an existing subscription to the node. If the subscriber does not have any
+     * other subscription to the node and his affiliation was of type <tt>none</tt> then
+     * remove the existing affiliation too.
+     *
+     * @param subscription the subscription to cancel.
+     */
+    public void cancelSubscription(NodeSubscription subscription) {
+        cancelSubscription(subscription, ClusterManager.isClusteringEnabled());
+    }
+
     /**
      * Returns the {@link PublishedItem} whose ID matches the specified item ID or <tt>null</tt>
      * if none was found. Item ID may or may not exist and it depends on the node's configuration.

src/java/org/jivesoftware/openfire/pubsub/cluster/CancelSubscriptionTask.java

@@ -32,6 +32,6 @@ public class CancelSubscriptionTask extends SubscriptionTask
 		
 		// This method will make a db call, but it will simply do nothing since
 		// the record will already be deleted.
-		node.cancelSubscription(getSubscription());
+		node.cancelSubscription(getSubscription(), false);
 	}
 }