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/*
*
* 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);
}
}
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