Messaging facade for clustered communications to allow implementations from JGroups or Hazelcast to be used.

* PropertyBackedBeanExporter uses the facade, configured with JGroups messaging implementation.
* Unfortunately, some remodelling required before this will work with Ehcache's CacheManagerPeerProviderFactory




git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@33830 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/cluster/HazelcastMessengerTest.java

@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2005-2012 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.alfresco.repo.cluster;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.verify;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+
+import com.hazelcast.core.ITopic;
+
+/**
+ * Tests for the HazelcastMessenger class.
+ * 
+ * @author Matt Ward
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class HazelcastMessengerTest
+{
+    private @Mock ITopic<String> topic;
+    private HazelcastMessenger<String> messenger;
+    private String receivedMsg;
+    
+    @Before
+    public void setUp()
+    {
+        messenger = new HazelcastMessenger<String>(topic);
+        receivedMsg = null;
+    }
+    
+    @Test
+    public void canSendMessage()
+    {
+        messenger.send("Test string");
+        verify(topic).publish("Test string");
+    }
+    
+    @Test
+    public void canReceiveMessage()
+    {
+        messenger.setReceiver(new MessageReceiver<String>()
+        {
+            @Override
+            public void onReceive(String message)
+            {
+                receivedMsg = new String(message);
+            }
+        });
+        
+        // Hazelcast will call the onMessage method...
+        messenger.onMessage("Hazelcast is sending a message.");
+        
+        // setReceiver() should have resulted in a listener being registered with the topic.
+        verify(topic).addMessageListener(messenger);
+        
+        assertEquals("Hazelcast is sending a message.", receivedMsg);
+    }
+}