bitronix.tm.journal.NullJournal Maven / Gradle / Ivy
/*
* Copyright (C) 2006-2013 Bitronix Software (http://www.bitronix.be)
*
* 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 bitronix.tm.journal;
import bitronix.tm.utils.Uid;
import java.io.IOException;
import java.util.Collections;
import java.util.Map;
import java.util.Set;
/**
* No-op journal. Do not use for anything else than testing as the transaction manager cannot guarantee
* data integrity with this journal implementation.
*
* @author Ludovic Orban
*/
public class NullJournal
implements Journal
{
/**
* Constructor NullJournal creates a new NullJournal instance.
*/
public NullJournal()
{
//No content
}
/**
* Log a new transaction status to journal. Note that the journal will not check the flow of the transactions.
* If you call this method with erroneous data, it will be added to the journal as-is.
*
* @param status
* transaction status to log.
* @param gtrid
* GTRID of the transaction.
* @param uniqueNames
* unique names of the RecoverableXAResourceProducers participating in the transaction.
*
* @throws java.io.IOException
* if an I/O error occurs.
*/
@Override
public void log(int status, Uid gtrid, Set uniqueNames) throws IOException
{
//No content
}
/**
* Open the journal. Integrity should be checked and an exception should be thrown in case the journal is corrupt.
*
* @throws java.io.IOException
* if an I/O error occurs.
*/
@Override
public void open() throws IOException
{
//No content
}
/**
* Close this journal and release all underlying resources.
*/
@Override
public void close()
{
//No content
}
/**
* Force journal to synchronize with permanent storage.
*/
@Override
public void force()
{
//No content
}
/**
* Collect all dangling records of the journal, ie: COMMITTING records with no corresponding COMMITTED record.
*
* @return a Map using Uid objects GTRID as key and implementations of {@link bitronix.tm.journal.JournalRecord} as value.
*/
@Override
public Map collectDanglingRecords()
{
return Collections.emptyMap();
}
/**
* Shutdown the service and free all held resources.
*/
@Override
public void shutdown()
{
//No content
}
/**
* Method toString ...
*
* @return String
*/
@Override
public String toString()
{
return "a NullJournal";
}
}