diff options
Diffstat (limited to 'qpid/java/broker/src/main/java/org/apache/qpid/server/txn/AutoCommitTransaction.java')
| -rwxr-xr-x | qpid/java/broker/src/main/java/org/apache/qpid/server/txn/AutoCommitTransaction.java | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/qpid/java/broker/src/main/java/org/apache/qpid/server/txn/AutoCommitTransaction.java b/qpid/java/broker/src/main/java/org/apache/qpid/server/txn/AutoCommitTransaction.java new file mode 100755 index 0000000000..36e9d78440 --- /dev/null +++ b/qpid/java/broker/src/main/java/org/apache/qpid/server/txn/AutoCommitTransaction.java @@ -0,0 +1,258 @@ +/* + * + * 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.apache.log4j.Logger; +import org.apache.qpid.AMQException; +import org.apache.qpid.AMQStoreException; +import org.apache.qpid.server.message.EnqueableMessage; +import org.apache.qpid.server.message.ServerMessage; +import org.apache.qpid.server.queue.BaseQueue; +import org.apache.qpid.server.queue.QueueEntry; +import org.apache.qpid.server.store.TransactionLog; + +/** + * 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 +{ + protected static final Logger _logger = Logger.getLogger(AutoCommitTransaction.class); + + private final TransactionLog _transactionLog; + + public AutoCommitTransaction(TransactionLog transactionLog) + { + _transactionLog = transactionLog; + } + + public long getTransactionStartTime() + { + return 0L; + } + + /** + * Since AutoCommitTransaction have no concept of a long lived transaction, any Actions registered + * by the caller are executed immediately. + */ + public void addPostTransactionAction(Action immediateAction) + { + immediateAction.postCommit(); + } + + public void dequeue(BaseQueue queue, EnqueableMessage message, Action postTransactionAction) + { + TransactionLog.Transaction txn = null; + try + { + if(message.isPersistent() && queue.isDurable()) + { + if (_logger.isDebugEnabled()) + { + _logger.debug("Dequeue of message number " + message.getMessageNumber() + " from transaction log. Queue : " + queue.getNameShortString()); + } + + txn = _transactionLog.newTransaction(); + txn.dequeueMessage(queue, message.getMessageNumber()); + txn.commitTran(); + txn = null; + } + postTransactionAction.postCommit(); + postTransactionAction = null; + } + catch (AMQException e) + { + _logger.error("Error during message dequeue", e); + throw new RuntimeException("Error during message dequeue", e); + } + finally + { + rollbackIfNecessary(postTransactionAction, txn); + } + + } + + public void dequeue(Collection<QueueEntry> queueEntries, Action postTransactionAction) + { + TransactionLog.Transaction txn = null; + try + { + for(QueueEntry entry : queueEntries) + { + ServerMessage message = entry.getMessage(); + BaseQueue queue = entry.getQueue(); + + if(message.isPersistent() && queue.isDurable()) + { + if (_logger.isDebugEnabled()) + { + _logger.debug("Dequeue of message number " + message.getMessageNumber() + " from transaction log. Queue : " + queue.getNameShortString()); + } + + if(txn == null) + { + txn = _transactionLog.newTransaction(); + } + + txn.dequeueMessage(queue, message.getMessageNumber()); + } + + } + if(txn != null) + { + txn.commitTran(); + txn = null; + } + postTransactionAction.postCommit(); + postTransactionAction = null; + } + catch (AMQException e) + { + _logger.error("Error during message dequeues", e); + throw new RuntimeException("Error during message dequeues", e); + } + finally + { + rollbackIfNecessary(postTransactionAction, txn); + } + + } + + + public void enqueue(BaseQueue queue, EnqueableMessage message, Action postTransactionAction) + { + TransactionLog.Transaction txn = null; + try + { + if(message.isPersistent() && queue.isDurable()) + { + if (_logger.isDebugEnabled()) + { + _logger.debug("Enqueue of message number " + message.getMessageNumber() + " to transaction log. Queue : " + queue.getNameShortString()); + } + + txn = _transactionLog.newTransaction(); + txn.enqueueMessage(queue, message.getMessageNumber()); + txn.commitTran(); + txn = null; + } + postTransactionAction.postCommit(); + postTransactionAction = null; + } + catch (AMQException e) + { + _logger.error("Error during message enqueue", e); + throw new RuntimeException("Error during message enqueue", e); + } + finally + { + rollbackIfNecessary(postTransactionAction, txn); + } + + + } + + public void enqueue(List<? extends BaseQueue> queues, EnqueableMessage message, Action postTransactionAction) + { + TransactionLog.Transaction txn = null; + try + { + + if(message.isPersistent()) + { + Long id = message.getMessageNumber(); + for(BaseQueue queue : queues) + { + if (queue.isDurable()) + { + if (_logger.isDebugEnabled()) + { + _logger.debug("Enqueue of message number " + message.getMessageNumber() + " to transaction log. Queue : " + queue.getNameShortString()); + } + if (txn == null) + { + txn = _transactionLog.newTransaction(); + } + + txn.enqueueMessage(queue, id); + } + } + + if (txn != null) + { + txn.commitTran(); + txn = null; + + } + } + postTransactionAction.postCommit(); + postTransactionAction = null; + } + catch (AMQException e) + { + _logger.error("Error during message enqueues", e); + throw new RuntimeException("Error during message enqueues", e); + } + finally + { + rollbackIfNecessary(postTransactionAction, txn); + } + + } + + + public void commit() + { + } + + public void rollback() + { + } + + private void rollbackIfNecessary(Action postTransactionAction, TransactionLog.Transaction txn) + { + if (txn != null) + { + try + { + txn.abortTran(); + } + catch (AMQStoreException e) + { + _logger.error("Abort transaction failed", e); + // Deliberate decision not to re-throw this exception. Rationale: we can only reach here if a previous + // TransactionLog method has ended in Exception. If we were to re-throw here, we would prevent + // our caller from receiving the original exception (which is likely to be more revealing of the underlying error). + } + } + if (postTransactionAction != null) + { + postTransactionAction.onRollback(); + } + } + +} |