/* 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 org.camunda.bpm.engine.impl.interceptor;
import java.lang.reflect.UndeclaredThrowableException;
import java.util.logging.Level;
import java.util.logging.Logger;
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;
/**
* @author Guillaume Nodet
*/
public class JtaTransactionInterceptor extends CommandInterceptor {
private static final Logger LOGGER = Logger.getLogger(JtaTransactionInterceptor.class.getName());
private final TransactionManager transactionManager;
private final boolean requiresNew;
public JtaTransactionInterceptor(TransactionManager transactionManager, boolean requiresNew) {
this.transactionManager = transactionManager;
this.requiresNew = requiresNew;
}
public <T> T execute(Command<T> command) {
Transaction oldTx = null;
try {
boolean existing = isExisting();
boolean isNew = !existing || requiresNew;
if (existing && requiresNew) {
oldTx = doSuspend();
}
if (isNew) {
doBegin();
}
T result;
try {
result = next.execute(command);
}
catch (RuntimeException ex) {
doRollback(isNew);
throw ex;
}
catch (Error err) {
doRollback(isNew);
throw err;
}
catch (Exception ex) {
doRollback(isNew);
throw new UndeclaredThrowableException(ex, "TransactionCallback threw undeclared checked exception");
}
if (isNew) {
doCommit();
}
return result;
} finally {
doResume(oldTx);
}
}
private void doBegin() {
try {
transactionManager.begin();
} catch (NotSupportedException e) {
throw new TransactionException("Unable to begin transaction", e);
} catch (SystemException e) {
throw new TransactionException("Unable to begin transaction", e);
}
}
private boolean isExisting() {
try {
return transactionManager.getStatus() != Status.STATUS_NO_TRANSACTION;
} catch (SystemException e) {
throw new TransactionException("Unable to retrieve transaction status", e);
}
}
private Transaction doSuspend() {
try {
return transactionManager.suspend();
} catch (SystemException e) {
throw new TransactionException("Unable to suspend transaction", e);
}
}
private void doResume(Transaction tx) {
if (tx != null) {
try {
transactionManager.resume(tx);
} catch (SystemException e) {
throw new TransactionException("Unable to resume transaction", e);
} catch (InvalidTransactionException e) {
throw new TransactionException("Unable to resume transaction", e);
}
}
}
private void doCommit() {
try {
transactionManager.commit();
} catch (HeuristicMixedException e) {
throw new TransactionException("Unable to commit transaction", e);
} catch (HeuristicRollbackException e) {
throw new TransactionException("Unable to commit transaction", e);
} catch (RollbackException e) {
throw new TransactionException("Unable to commit transaction", e);
} catch (SystemException e) {
throw new TransactionException("Unable to commit transaction", e);
} catch (RuntimeException e) {
doRollback(true);
throw e;
} catch (Error e) {
doRollback(true);
throw e;
}
}
private void doRollback(boolean isNew) {
try {
if (isNew) {
transactionManager.rollback();
} else {
transactionManager.setRollbackOnly();
}
} catch (SystemException e) {
LOGGER.log(Level.FINE, "Error when rolling back transaction", e);
}
}
private static class TransactionException extends RuntimeException {
private static final long serialVersionUID = 1L;
private TransactionException() {
}
private TransactionException(String s) {
super(s);
}
private TransactionException(String s, Throwable throwable) {
super(s, throwable);
}
private TransactionException(Throwable throwable) {
super(throwable);
}
}
}