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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.txn;
import org.apache.qpid.server.message.EnqueableMessage;
import org.apache.qpid.server.protocol.AMQSessionModel;
import org.apache.qpid.server.queue.BaseQueue;
import org.apache.qpid.server.queue.QueueEntry;
import org.apache.qpid.server.store.MessageStore;
import org.apache.qpid.server.store.Transaction;
import org.apache.qpid.server.virtualhost.VirtualHost;
import org.apache.qpid.transport.Xid;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
public class DistributedTransaction implements ServerTransaction
{
private final AutoCommitTransaction _autoCommitTransaction;
private volatile Transaction _transaction;
private long _txnStartTime = 0L;
private DtxBranch _branch;
private AMQSessionModel _session;
private VirtualHost _vhost;
public DistributedTransaction(AMQSessionModel session, MessageStore store, VirtualHost vhost)
{
_session = session;
_vhost = vhost;
_autoCommitTransaction = new AutoCommitTransaction(vhost.getMessageStore());
}
public long getTransactionStartTime()
{
return _txnStartTime;
}
public void addPostTransactionAction(Action postTransactionAction)
{
if(_branch != null)
{
_branch.addPostTransactionAcion(postTransactionAction);
}
else
{
_autoCommitTransaction.addPostTransactionAction(postTransactionAction);
}
}
public void dequeue(BaseQueue queue, EnqueableMessage message, Action postTransactionAction)
{
if(_branch != null)
{
_branch.dequeue(queue, message);
_branch.addPostTransactionAcion(postTransactionAction);
}
else
{
_autoCommitTransaction.dequeue(queue, message, postTransactionAction);
}
}
public void dequeue(Collection<QueueEntry> messages, Action postTransactionAction)
{
if(_branch != null)
{
for(QueueEntry entry : messages)
{
_branch.dequeue(entry.getQueue(), entry.getMessage());
}
_branch.addPostTransactionAcion(postTransactionAction);
}
else
{
_autoCommitTransaction.dequeue(messages, postTransactionAction);
}
}
public void enqueue(BaseQueue queue, EnqueableMessage message, Action postTransactionAction)
{
if(_branch != null)
{
_branch.enqueue(queue, message);
_branch.addPostTransactionAcion(postTransactionAction);
enqueue(Collections.singletonList(queue), message, postTransactionAction, System.currentTimeMillis());
}
else
{
_autoCommitTransaction.enqueue(queue, message, postTransactionAction);
}
}
public void enqueue(List<? extends BaseQueue> queues, EnqueableMessage message,
Action postTransactionAction, long currentTime)
{
if(_branch != null)
{
for(BaseQueue queue : queues)
{
_branch.enqueue(queue, message);
}
_branch.addPostTransactionAcion(postTransactionAction);
}
else
{
_autoCommitTransaction.enqueue(queues, message, postTransactionAction, currentTime);
}
}
public void commit()
{
throw new IllegalStateException("Cannot call tx.commit() on a distributed transaction");
}
public void commit(Runnable immediatePostTransactionAction)
{
throw new IllegalStateException("Cannot call tx.commit() on a distributed transaction");
}
public void rollback()
{
throw new IllegalStateException("Cannot call tx.rollback() on a distributed transaction");
}
public boolean isTransactional()
{
return _branch != null;
}
public void start(Xid id, boolean join, boolean resume)
throws UnknownDtxBranchException, AlreadyKnownDtxException, JoinAndResumeDtxException
{
if(join && resume)
{
throw new JoinAndResumeDtxException(id);
}
DtxBranch branch = _vhost.getDtxRegistry().getBranch(id);
if(branch == null)
{
if(join || resume)
{
throw new UnknownDtxBranchException(id);
}
branch = new DtxBranch(id,_vhost.getMessageStore(), _vhost);
if(_vhost.getDtxRegistry().registerBranch(branch))
{
_branch = branch;
branch.associateSession(_session);
}
else
{
throw new AlreadyKnownDtxException(id);
}
}
else
{
if(join)
{
branch.associateSession(_session);
}
else if(resume)
{
branch.resumeSession(_session);
}
else
{
throw new AlreadyKnownDtxException(id);
}
_branch = branch;
}
}
public void end(Xid id, boolean fail, boolean suspend)
throws UnknownDtxBranchException, NotAssociatedDtxException, SuspendAndFailDtxException, TimeoutDtxException
{
DtxBranch branch = _vhost.getDtxRegistry().getBranch(id);
if(suspend && fail)
{
branch.disassociateSession(_session);
_branch = null;
throw new SuspendAndFailDtxException(id);
}
if(branch == null)
{
throw new UnknownDtxBranchException(id);
}
else
{
if(!branch.isAssociated(_session))
{
throw new NotAssociatedDtxException(id);
}
if(branch.expired() || branch.getState() == DtxBranch.State.TIMEDOUT)
{
branch.disassociateSession(_session);
throw new TimeoutDtxException(id);
}
if(suspend)
{
branch.suspendSession(_session);
}
else
{
if(fail)
{
branch.setState(DtxBranch.State.ROLLBACK_ONLY);
}
branch.disassociateSession(_session);
}
_branch = null;
}
}
}
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