Creating a branch for experimenting with some ideas for JMS client.rajith_jms_client

git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/rajith_jms_client@1128369 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 58 insertions, 0 deletions

diff --git a/qpid/java/broker/src/main/java/org/apache/qpid/server/message/MessageReference.java b/qpid/java/broker/src/main/java/org/apache/qpid/server/message/MessageReference.java
new file mode 100644
index 0000000000..399f8f9327
--- /dev/null
+++ b/qpid/java/broker/src/main/java/org/apache/qpid/server/message/MessageReference.java
@@ -0,0 +1,58 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+package org.apache.qpid.server.message;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+
+public abstract class MessageReference<M extends ServerMessage>
+{
+
+    private final AtomicBoolean _released = new AtomicBoolean(false);
+
+    private volatile M _message;
+
+    public MessageReference(M message)
+    {
+        _message = message;
+        onReference(message);
+    }
+
+    abstract protected void onReference(M message);
+
+    abstract protected void onRelease(M message);
+
+    public M getMessage()
+    {
+        return _message;
+    }
+
+    public void release()
+    {
+        if(!_released.getAndSet(true))
+        {
+            if(_message != null)
+            {
+                onRelease(_message);
+            }
+        }
+    }
+
+}