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SCA4J Transaction Definitions.
/**
* SCA4J
* Copyright (c) 2009 - 2099 Service Symphony Ltd
*
* Licensed to you under the Apache License, Version 2.0 (the "License"); you may
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*
* http://www.opensource.org/licenses/apache2.0.php
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*
* This project contains code licensed from the Apache Software Foundation under
* the Apache License, Version 2.0 and original code from project contributors.
*
*
* Original Codehaus Header
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* Copyright (c) 2007 - 2008 fabric3 project contributors
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* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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* the Apache License, Version 2.0 and original code from project contributors.
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* to you under the Apache License, Version 2.0 (the
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package org.sca4j.tx.interceptor;
import javax.transaction.HeuristicMixedException;
import javax.transaction.HeuristicRollbackException;
import javax.transaction.InvalidTransactionException;
import javax.transaction.NotSupportedException;
import javax.transaction.RollbackException;
import javax.transaction.Status;
import javax.transaction.SystemException;
import javax.transaction.Transaction;
import javax.transaction.TransactionManager;
import org.sca4j.spi.invocation.Message;
import org.sca4j.spi.wire.Interceptor;
import org.sca4j.tx.TxException;
/**
* @version $Revision$ $Date$
*/
public class TxInterceptor implements Interceptor {
private Interceptor next;
private TransactionManager transactionManager;
private TxAction txAction;
private TxMonitor monitor;
/**
* Initializes the transaction manager.
*
* @param transactionManager Transaction manager to be initialized.
* @param txAction Transaction action.
* @param monitor Transaction monitor.
*/
public TxInterceptor(TransactionManager transactionManager, TxAction txAction, TxMonitor monitor) {
this.transactionManager = transactionManager;
this.txAction = txAction;
this.monitor = monitor;
monitor.interceptorInitialized(txAction);
}
public Interceptor getNext() {
return next;
}
public void setNext(Interceptor next) {
this.next = next;
}
public Message invoke(Message message) {
Transaction transaction = getTransaction();
if (txAction == TxAction.BEGIN) {
if (transaction == null) {
begin();
} else {
monitor.joined(hashCode());
}
} else if (txAction == TxAction.SUSPEND && transaction != null) {
suspend();
}
Message ret;
try {
ret = next.invoke(message);
} catch (RuntimeException e) {
if(txAction == TxAction.BEGIN && transaction == null) {
rollback();
} else if(txAction == TxAction.SUSPEND && transaction != null) {
setRollbackOnly();
}
throw e;
}
if(txAction == TxAction.BEGIN && transaction == null && !ret.isFault()) {
commit();
} else if(txAction == TxAction.BEGIN && transaction == null && ret.isFault()) {
rollback();
} else if(txAction == TxAction.SUSPEND && transaction != null) {
resume(transaction);
}
return ret;
}
private void setRollbackOnly() {
try {
monitor.markedForRollback(hashCode());
transactionManager.setRollbackOnly();
} catch (SystemException e) {
throw new TxException(e);
}
}
private Transaction getTransaction() {
try {
return transactionManager.getTransaction();
} catch (SystemException e) {
throw new TxException(e);
}
}
private void rollback() {
try {
monitor.rolledback(hashCode());
transactionManager.rollback();
} catch (SystemException e) {
throw new TxException(e);
}
}
private void begin() {
try {
monitor.started(hashCode());
transactionManager.begin();
} catch (NotSupportedException e) {
throw new TxException(e);
} catch (SystemException e) {
throw new TxException(e);
}
}
private void suspend() {
try {
monitor.suspended(hashCode());
transactionManager.suspend();
} catch (SystemException e) {
throw new TxException(e);
}
}
private void resume(Transaction transaction) {
try {
monitor.resumed(hashCode());
transactionManager.resume(transaction);
} catch (SystemException e) {
throw new TxException(e);
} catch (InvalidTransactionException e) {
throw new TxException(e);
} catch (IllegalStateException e) {
throw new TxException(e);
}
}
private void commit() {
try {
if (transactionManager.getStatus() != Status.STATUS_MARKED_ROLLBACK) {
monitor.committed(hashCode());
transactionManager.commit();
} else {
rollback();
}
} catch (SystemException e) {
throw new TxException(e);
} catch (IllegalStateException e) {
throw new TxException(e);
} catch (SecurityException e) {
throw new TxException(e);
} catch (HeuristicMixedException e) {
throw new TxException(e);
} catch (HeuristicRollbackException e) {
throw new TxException(e);
} catch (RollbackException e) {
throw new TxException(e);
}
}
}