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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.berkeleydb;
import java.io.File;
import org.apache.log4j.Logger;
import org.apache.qpid.AMQStoreException;
import org.apache.qpid.server.store.MessageStore;
import org.apache.qpid.server.store.StoreFuture;
import com.sleepycat.je.DatabaseException;
import com.sleepycat.je.Environment;
import com.sleepycat.je.EnvironmentConfig;
/**
* BDBMessageStore implements a persistent {@link MessageStore} using the BDB high performance log.
*
* <p/><table id="crc"><caption>CRC Card</caption> <tr><th> Responsibilities <th> Collaborations <tr><td> Accept
* transaction boundary demarcations: Begin, Commit, Abort. <tr><td> Store and remove queues. <tr><td> Store and remove
* exchanges. <tr><td> Store and remove messages. <tr><td> Bind and unbind queues to exchanges. <tr><td> Enqueue and
* dequeue messages to queues. <tr><td> Generate message identifiers. </table>
*/
public class BDBMessageStore extends AbstractBDBMessageStore
{
private static final Logger LOGGER = Logger.getLogger(BDBMessageStore.class);
public static final String TYPE = "BDB";
private CommitThreadWrapper _commitThreadWrapper;
@Override
protected void setupStore(File storePath, String name) throws DatabaseException, AMQStoreException
{
super.setupStore(storePath, name);
_commitThreadWrapper = new CommitThreadWrapper("Commit-Thread-" + name, getEnvironment());
_commitThreadWrapper.startCommitThread();
}
protected Environment createEnvironment(File environmentPath) throws DatabaseException
{
LOGGER.info("BDB message store using environment path " + environmentPath.getAbsolutePath());
EnvironmentConfig envConfig = createEnvironmentConfig();
try
{
return new Environment(environmentPath, envConfig);
}
catch (DatabaseException de)
{
if (de.getMessage().contains("Environment.setAllowCreate is false"))
{
//Allow the creation this time
envConfig.setAllowCreate(true);
return new Environment(environmentPath, envConfig);
}
else
{
throw de;
}
}
}
@Override
protected void closeInternal() throws Exception
{
_commitThreadWrapper.stopCommitThread();
super.closeInternal();
}
@Override
protected StoreFuture commit(com.sleepycat.je.Transaction tx, boolean syncCommit) throws DatabaseException
{
try
{
tx.commitNoSync();
}
catch(DatabaseException de)
{
LOGGER.error("Got DatabaseException on commit, closing environment", de);
closeEnvironmentSafely();
throw de;
}
return _commitThreadWrapper.commit(tx, syncCommit);
}
@Override
public String getStoreType()
{
return TYPE;
}
}
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