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/*
*
* Copyright (c) 2006 The Apache Software Foundation
*
* Licensed 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.framing.ContentBody;
import org.apache.qpid.server.queue.AMQQueue;
import org.apache.qpid.server.queue.MessageMetaData;
import org.apache.qpid.server.queue.QueueRegistry;
import java.util.ArrayList;
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, MessageMetaData> _metaDataMap;
protected ConcurrentMap<Long, List<ContentBody>> _contentBodyMap;
private final AtomicLong _messageId = new AtomicLong(1);
public void configure()
{
_log.info("Using capacity " + DEFAULT_HASHTABLE_CAPACITY + " for hash tables");
_metaDataMap = new ConcurrentHashMap<Long, MessageMetaData>(DEFAULT_HASHTABLE_CAPACITY);
_contentBodyMap = new ConcurrentHashMap<Long, List<ContentBody>>(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 tables");
_metaDataMap = new ConcurrentHashMap<Long, MessageMetaData>(hashtableCapacity);
_contentBodyMap = new ConcurrentHashMap<Long, List<ContentBody>>(hashtableCapacity);
}
public void configure(QueueRegistry queueRegistry, String base, Configuration config) throws Exception
{
configure(base, config);
}
public void close() throws Exception
{
if (_metaDataMap != null)
{
_metaDataMap.clear();
_metaDataMap = null;
}
if (_contentBodyMap != null)
{
_contentBodyMap.clear();
_contentBodyMap = null;
}
}
public void removeMessage(long messageId)
{
if (_log.isDebugEnabled())
{
_log.debug("Removing message with id " + messageId);
}
_metaDataMap.remove(messageId);
_contentBodyMap.remove(messageId);
}
public void createQueue(AMQQueue queue) throws AMQException
{
// Not required to do anything
}
public void removeQueue(String name) throws AMQException
{
// Not required to do anything
}
public void enqueueMessage(String name, long messageId) throws AMQException
{
// Not required to do anything
}
public void dequeueMessage(String name, long messageId) throws AMQException
{
// Not required to do anything
}
public void beginTran() throws AMQException
{
// Not required to do anything
}
public void commitTran() throws AMQException
{
// Not required to do anything
}
public void abortTran() throws AMQException
{
// Not required to do anything
}
public boolean inTran()
{
return false;
}
public List<AMQQueue> createQueues() throws AMQException
{
return null;
}
public long getNewMessageId()
{
return _messageId.getAndIncrement();
}
public void storeContentBodyChunk(long messageId, int index, ContentBody contentBody) throws AMQException
{
List<ContentBody> bodyList = _contentBodyMap.get(messageId);
if (bodyList == null)
{
bodyList = new ArrayList<ContentBody>();
_contentBodyMap.put(messageId, bodyList);
}
bodyList.add(index, contentBody);
}
public void storeMessageMetaData(long messageId, MessageMetaData messageMetaData) throws AMQException
{
_metaDataMap.put(messageId, messageMetaData);
}
public MessageMetaData getMessageMetaData(long messageId) throws AMQException
{
return _metaDataMap.get(messageId);
}
public ContentBody getContentBodyChunk(long messageId, int index) throws AMQException
{
List<ContentBody> bodyList = _contentBodyMap.get(messageId);
return bodyList.get(index);
}
}
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