Messaging facade: finished changing jgroups heartbeating over to facade.

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@33886 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

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

@@ -0,0 +1,44 @@
+/*
+ * 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;
+
+/**
+ * Static container for MessengerFactory. This allows code to obtain the correct
+ * {@link MessengerFactory} implementation where dependency injection is not available.
+ * 
+ * @author Matt Ward
+ */
+public class MessengerFactoryProvider
+{
+    private static MessengerFactory instance;
+    
+    public void setInstance(MessengerFactory messengerFactory)
+    {
+        instance = messengerFactory;
+    }
+    
+    public static MessengerFactory getInstance()
+    {
+        if (instance == null)
+        {
+            throw new IllegalStateException("MessengerFactory instance not configured yet.");
+        }
+        return instance;
+    }
+}