1 files changed, 145 insertions, 0 deletions
diff --git a/java/java/broker/src/org/apache/qpid/server/store/MemoryMessageStore.java b/java/java/broker/src/org/apache/qpid/server/store/MemoryMessageStore.java
new file mode 100644
index 0000000000..328aed81d9
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+++ b/java/java/broker/src/org/apache/qpid/server/store/MemoryMessageStore.java
@@ -0,0 +1,145 @@
+/*
+ *
+ * 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.store;
+
+import org.apache.commons.configuration.Configuration;
+import org.apache.log4j.Logger;
+import org.apache.qpid.AMQException;
+import org.apache.qpid.server.queue.AMQMessage;
+import org.apache.qpid.server.queue.AMQQueue;
+import org.apache.qpid.server.queue.QueueRegistry;
+
+import java.util.List;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.atomic.AtomicLong;
+
+/**
+ * A simple message store that stores the messages in a threadsafe structure in memory.
+ */
+public class MemoryMessageStore implements MessageStore
+{
+    private static final Logger _log = Logger.getLogger(MemoryMessageStore.class);
+
+    private static final int DEFAULT_HASHTABLE_CAPACITY = 50000;
+
+    private static final String HASHTABLE_CAPACITY_CONFIG = "hashtable-capacity";
+
+    protected ConcurrentMap<Long, AMQMessage> _messageMap;
+
+    private final AtomicLong _messageId = new AtomicLong(1);
+
+    public void configure()
+    {
+        _log.info("Using capacity " + DEFAULT_HASHTABLE_CAPACITY + " for hash table");
+        _messageMap = new ConcurrentHashMap<Long, AMQMessage>(DEFAULT_HASHTABLE_CAPACITY);
+    }
+
+    public void configure(String base, Configuration config)
+    {
+        int hashtableCapacity = config.getInt(base + "." + HASHTABLE_CAPACITY_CONFIG, DEFAULT_HASHTABLE_CAPACITY);
+        _log.info("Using capacity " + hashtableCapacity + " for hash table");
+        _messageMap = new ConcurrentHashMap<Long, AMQMessage>(hashtableCapacity);
+    }
+
+    public void configure(QueueRegistry queueRegistry, String base, Configuration config) throws Exception
+    {
+        configure(base, config);
+    }
+
+    public void close() throws Exception
+    {
+        if (_messageMap != null)
+        {
+            _messageMap.clear();
+            _messageMap = null;
+        }
+    }
+
+    public void put(AMQMessage msg)
+    {
+        _messageMap.put(msg.getMessageId(), msg);
+    }
+
+    public void removeMessage(long messageId)
+    {
+        if (_log.isDebugEnabled())
+        {
+            _log.debug("Removing message with id " + messageId);
+        }
+        _messageMap.remove(messageId);
+    }
+
+    public void createQueue(AMQQueue queue) throws AMQException
+    {
+        //To change body of implemented methods use File | Settings | File Templates.
+    }
+
+    public void removeQueue(String name) throws AMQException
+    {
+        //To change body of implemented methods use File | Settings | File Templates.
+    }
+
+    public void enqueueMessage(String name, long messageId) throws AMQException
+    {
+        //To change body of implemented methods use File | Settings | File Templates.
+    }
+
+    public void dequeueMessage(String name, long messageId) throws AMQException
+    {
+        //To change body of implemented methods use File | Settings | File Templates.
+    }
+
+    public void beginTran() throws AMQException
+    {
+        //To change body of implemented methods use File | Settings | File Templates.
+    }
+
+    public void commitTran() throws AMQException
+    {
+        //To change body of implemented methods use File | Settings | File Templates.
+    }
+
+    public void abortTran() throws AMQException
+    {
+        //To change body of implemented methods use File | Settings | File Templates.
+    }
+
+    public boolean inTran()
+    {
+        return false;
+    }
+
+    public List<AMQQueue> createQueues() throws AMQException
+    {
+        return null;  //To change body of implemented methods use File | Settings | File Templates.
+    }
+
+    public long getNewMessageId()
+    {
+        return _messageId.getAndIncrement();
+    }
+
+    public AMQMessage getMessage(long messageId)
+    {
+        return _messageMap.get(messageId);
+    }
+}