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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.framing.AMQShortString;
import org.apache.qpid.framing.FieldTable;
import org.apache.qpid.framing.abstraction.ContentChunk;
import org.apache.qpid.server.queue.AMQQueueImpl;
import org.apache.qpid.server.queue.MessageMetaData;
import org.apache.qpid.server.exchange.Exchange;
import org.apache.qpid.server.queue.AMQQueue;
import org.apache.qpid.server.virtualhost.VirtualHost;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.atomic.AtomicBoolean;
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<ContentChunk>> _contentBodyMap;
private final AtomicLong _messageId = new AtomicLong(1);
private AtomicBoolean _closed = new AtomicBoolean(false);
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<ContentChunk>>(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<ContentChunk>>(hashtableCapacity);
}
public void configure(VirtualHost virtualHost, String base, Configuration config) throws Exception
{
configure(base, config);
}
public void close() throws Exception
{
_closed.getAndSet(true);
if (_metaDataMap != null)
{
_metaDataMap.clear();
_metaDataMap = null;
}
if (_contentBodyMap != null)
{
_contentBodyMap.clear();
_contentBodyMap = null;
}
}
public void removeMessage(StoreContext context, Long messageId) throws AMQException
{
checkNotClosed();
if (_log.isDebugEnabled())
{
_log.debug("Removing message with id " + messageId);
}
_metaDataMap.remove(messageId);
_contentBodyMap.remove(messageId);
}
public void createExchange(Exchange exchange) throws AMQException
{
}
public void removeExchange(Exchange exchange) throws AMQException
{
}
public void bindQueue(Exchange exchange, AMQShortString routingKey, AMQQueue queue, FieldTable args) throws AMQException
{
}
public void unbindQueue(Exchange exchange, AMQShortString routingKey, AMQQueue queue, FieldTable args) throws AMQException
{
}
public void createQueue(AMQQueue queue) throws AMQException
{
// Not required to do anything
}
public void removeQueue(AMQShortString name) throws AMQException
{
// Not required to do anything
}
public void enqueueMessage(StoreContext context, AMQShortString name, Long messageId) throws AMQException
{
// Not required to do anything
}
public void dequeueMessage(StoreContext context, AMQShortString name, Long messageId) throws AMQException
{
// Not required to do anything
}
public void beginTran(StoreContext context) throws AMQException
{
// Not required to do anything
}
public void commitTran(StoreContext context) throws AMQException
{
// Not required to do anything
}
public void abortTran(StoreContext context) throws AMQException
{
// Not required to do anything
}
public boolean inTran(StoreContext context)
{
return false;
}
public List<AMQQueue> createQueues() throws AMQException
{
return null;
}
public Long getNewMessageId()
{
return _messageId.getAndIncrement();
}
public void storeContentBodyChunk(StoreContext context, Long messageId, int index, ContentChunk contentBody, boolean lastContentBody)
throws AMQException
{
checkNotClosed();
List<ContentChunk> bodyList = _contentBodyMap.get(messageId);
if (bodyList == null && lastContentBody)
{
_contentBodyMap.put(messageId, Collections.singletonList(contentBody));
}
else
{
if (bodyList == null)
{
bodyList = new ArrayList<ContentChunk>();
_contentBodyMap.put(messageId, bodyList);
}
bodyList.add(index, contentBody);
}
}
public void storeMessageMetaData(StoreContext context, Long messageId, MessageMetaData messageMetaData)
throws AMQException
{
checkNotClosed();
_metaDataMap.put(messageId, messageMetaData);
}
public MessageMetaData getMessageMetaData(StoreContext context, Long messageId) throws AMQException
{
checkNotClosed();
return _metaDataMap.get(messageId);
}
public ContentChunk getContentBodyChunk(StoreContext context, Long messageId, int index) throws AMQException
{
checkNotClosed();
List<ContentChunk> bodyList = _contentBodyMap.get(messageId);
return bodyList.get(index);
}
private void checkNotClosed() throws MessageStoreClosedException
{
if (_closed.get())
{
throw new MessageStoreClosedException();
}
}
}
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