| /* |
| * |
| * 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 java.util.Collection; |
| import java.util.List; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.qpid.server.message.EnqueueableMessage; |
| import org.apache.qpid.server.message.MessageInstance; |
| import org.apache.qpid.server.queue.BaseQueue; |
| import org.apache.qpid.server.store.MessageEnqueueRecord; |
| import org.apache.qpid.server.store.MessageStore; |
| import org.apache.qpid.server.store.Transaction; |
| import org.apache.qpid.server.store.TransactionLogResource; |
| |
| /** |
| * An implementation of ServerTransaction where each enqueue/dequeue |
| * operation takes place within it own transaction. |
| * |
| * Since there is no long-lived transaction, the commit and rollback methods of |
| * this implementation are empty. |
| */ |
| public class AutoCommitTransaction implements ServerTransaction |
| { |
| private static final Logger LOGGER = LoggerFactory.getLogger(AutoCommitTransaction.class); |
| |
| private final MessageStore _messageStore; |
| |
| public AutoCommitTransaction(MessageStore transactionLog) |
| { |
| _messageStore = transactionLog; |
| } |
| |
| @Override |
| public long getTransactionStartTime() |
| { |
| return 0L; |
| } |
| |
| @Override |
| public long getTransactionUpdateTime() |
| { |
| return 0L; |
| } |
| |
| /** |
| * Since AutoCommitTransaction have no concept of a long lived transaction, any Actions registered |
| * by the caller are executed immediately. |
| */ |
| @Override |
| public void addPostTransactionAction(final Action immediateAction) |
| { |
| immediateAction.postCommit(); |
| } |
| |
| @Override |
| public void dequeue(MessageEnqueueRecord record, Action postTransactionAction) |
| { |
| Transaction txn = null; |
| try |
| { |
| if(record != null) |
| { |
| LOGGER.debug("Dequeue of message number {} from transaction log. Queue : {}", record.getMessageNumber(), record.getQueueId()); |
| |
| txn = _messageStore.newTransaction(); |
| txn.dequeueMessage(record); |
| txn.commitTran(); |
| txn = null; |
| } |
| postTransactionAction.postCommit(); |
| postTransactionAction = null; |
| } |
| finally |
| { |
| rollbackIfNecessary(postTransactionAction, txn); |
| } |
| |
| } |
| |
| |
| @Override |
| public void dequeue(Collection<MessageInstance> queueEntries, Action postTransactionAction) |
| { |
| Transaction txn = null; |
| try |
| { |
| for(MessageInstance entry : queueEntries) |
| { |
| MessageEnqueueRecord enqueueRecord = entry.getEnqueueRecord(); |
| if(enqueueRecord != null) |
| { |
| LOGGER.debug("Dequeue of message number {} from transaction log. Queue : {}", enqueueRecord.getMessageNumber(), enqueueRecord.getQueueId()); |
| |
| if(txn == null) |
| { |
| txn = _messageStore.newTransaction(); |
| } |
| |
| txn.dequeueMessage(enqueueRecord); |
| } |
| |
| } |
| if(txn != null) |
| { |
| txn.commitTran(); |
| txn = null; |
| } |
| postTransactionAction.postCommit(); |
| postTransactionAction = null; |
| } |
| finally |
| { |
| rollbackIfNecessary(postTransactionAction, txn); |
| } |
| |
| } |
| |
| |
| @Override |
| public void enqueue(TransactionLogResource queue, EnqueueableMessage message, EnqueueAction postTransactionAction) |
| { |
| Transaction txn = null; |
| try |
| { |
| final MessageEnqueueRecord record; |
| if(queue.getMessageDurability().persist(message.isPersistent())) |
| { |
| LOGGER.debug("Enqueue of message number {} to transaction log. Queue : {}", message.getMessageNumber(), queue.getName()); |
| |
| txn = _messageStore.newTransaction(); |
| record = txn.enqueueMessage(queue, message); |
| txn.commitTran(); |
| txn = null; |
| } |
| else |
| { |
| record = null; |
| } |
| if(postTransactionAction != null) |
| { |
| postTransactionAction.postCommit(record); |
| } |
| postTransactionAction = null; |
| } |
| finally |
| { |
| final EnqueueAction underlying = postTransactionAction; |
| rollbackIfNecessary(new Action() |
| { |
| @Override |
| public void postCommit() |
| { |
| |
| } |
| |
| @Override |
| public void onRollback() |
| { |
| if(underlying != null) |
| { |
| underlying.onRollback(); |
| } |
| } |
| }, txn); |
| } |
| |
| |
| } |
| |
| @Override |
| public void enqueue(Collection<? extends BaseQueue> queues, EnqueueableMessage message, EnqueueAction postTransactionAction) |
| { |
| Transaction txn = null; |
| try |
| { |
| MessageEnqueueRecord[] enqueueRecords = new MessageEnqueueRecord[queues.size()]; |
| int i = 0; |
| for(BaseQueue queue : queues) |
| { |
| if (queue.getMessageDurability().persist(message.isPersistent())) |
| { |
| LOGGER.debug("Enqueue of message number {} to transaction log. Queue : {}", message.getMessageNumber(), queue.getName()); |
| |
| if (txn == null) |
| { |
| txn = _messageStore.newTransaction(); |
| } |
| enqueueRecords[i] = txn.enqueueMessage(queue, message); |
| |
| |
| } |
| i++; |
| } |
| if (txn != null) |
| { |
| txn.commitTran(); |
| txn = null; |
| } |
| |
| if(postTransactionAction != null) |
| { |
| postTransactionAction.postCommit(enqueueRecords); |
| } |
| postTransactionAction = null; |
| |
| |
| } |
| finally |
| { |
| final EnqueueAction underlying = postTransactionAction; |
| rollbackIfNecessary(new Action() |
| { |
| @Override |
| public void postCommit() |
| { |
| |
| } |
| |
| @Override |
| public void onRollback() |
| { |
| if(underlying != null) |
| { |
| underlying.onRollback(); |
| } |
| } |
| }, txn); |
| } |
| |
| } |
| |
| |
| @Override |
| public void commit(final Runnable immediatePostTransactionAction) |
| { |
| immediatePostTransactionAction.run(); |
| } |
| |
| @Override |
| public void commit() |
| { |
| } |
| |
| @Override |
| public void rollback() |
| { |
| } |
| |
| @Override |
| public boolean isTransactional() |
| { |
| return false; |
| } |
| |
| private void rollbackIfNecessary(Action postTransactionAction, Transaction txn) |
| { |
| if (txn != null) |
| { |
| txn.abortTran(); |
| } |
| if (postTransactionAction != null) |
| { |
| postTransactionAction.onRollback(); |
| } |
| } |
| |
| |
| |
| } |