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Apache Geronimo Transaction Manager
/**
* 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.geronimo.transaction.manager;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import javax.resource.spi.XATerminator;
import javax.transaction.InvalidTransactionException;
import javax.transaction.Status;
import javax.transaction.SystemException;
import javax.transaction.Transaction;
import javax.transaction.xa.XAException;
import javax.transaction.xa.XAResource;
import javax.transaction.xa.Xid;
/**
* @version $Rev: 550546 $ $Date: 2007-06-25 12:52:11 -0400 (Mon, 25 Jun 2007) $
*/
public class GeronimoTransactionManager extends TransactionManagerImpl implements XATerminator, XAWork {
private final Map importedTransactions = new HashMap();
private boolean isInRecovery = false;
public GeronimoTransactionManager() throws XAException {
}
public GeronimoTransactionManager(int defaultTransactionTimeoutSeconds) throws XAException {
super(defaultTransactionTimeoutSeconds);
}
public GeronimoTransactionManager(int defaultTransactionTimeoutSeconds, TransactionLog transactionLog) throws XAException {
super(defaultTransactionTimeoutSeconds, transactionLog);
}
public GeronimoTransactionManager(int defaultTransactionTimeoutSeconds, XidFactory xidFactory, TransactionLog transactionLog) throws XAException {
super(defaultTransactionTimeoutSeconds, xidFactory, transactionLog);
}
/**
* @see javax.resource.spi.XATerminator#commit(javax.transaction.xa.Xid, boolean)
*/
public void commit(Xid xid, boolean onePhase) throws XAException {
Transaction importedTransaction;
synchronized (importedTransactions) {
importedTransaction = (Transaction) importedTransactions.remove(xid);
}
if (importedTransaction == null) {
throw new XAException("No imported transaction for xid: " + xid);
}
try {
int status = importedTransaction.getStatus();
assert status == Status.STATUS_ACTIVE || status == Status.STATUS_PREPARED: "invalid status: " + status;
} catch (SystemException e) {
throw (XAException)new XAException().initCause(e);
}
commit(importedTransaction, onePhase);
}
/**
* @see javax.resource.spi.XATerminator#forget(javax.transaction.xa.Xid)
*/
public void forget(Xid xid) throws XAException {
Transaction importedTransaction;
synchronized (importedTransactions) {
importedTransaction = (Transaction) importedTransactions.remove(xid);
}
if (importedTransaction == null) {
throw new XAException("No imported transaction for xid: " + xid);
}
//todo is there a correct status test here?
// try {
// int status = tx.getStatus();
// assert status == Status.STATUS_ACTIVE || status == Status.STATUS_PREPARED;
// } catch (SystemException e) {
// throw new XAException();
// }
forget(importedTransaction);
}
/**
* @see javax.resource.spi.XATerminator#prepare(javax.transaction.xa.Xid)
*/
public int prepare(Xid xid) throws XAException {
Transaction importedTransaction;
synchronized (importedTransactions) {
importedTransaction = (Transaction) importedTransactions.get(xid);
}
if (importedTransaction == null) {
throw new XAException("No imported transaction for xid: " + xid);
}
try {
int status = importedTransaction.getStatus();
assert status == Status.STATUS_ACTIVE;
} catch (SystemException e) {
throw (XAException)new XAException().initCause(e);
}
return prepare(importedTransaction);
}
/**
* @see javax.resource.spi.XATerminator#recover(int)
*/
public Xid[] recover(int flag) throws XAException {
if (!isInRecovery) {
if ((flag & XAResource.TMSTARTRSCAN) == 0) {
throw new XAException(XAException.XAER_PROTO);
}
isInRecovery = true;
}
if ((flag & XAResource.TMENDRSCAN) != 0) {
isInRecovery = false;
}
//we always return all xids in first call.
//calling "startrscan" repeatedly starts at beginning of list again.
if ((flag & XAResource.TMSTARTRSCAN) != 0) {
Map recoveredXidMap = getExternalXids();
Xid[] recoveredXids = new Xid[recoveredXidMap.size()];
int i = 0;
synchronized (importedTransactions) {
for (Iterator iterator = recoveredXidMap.entrySet().iterator(); iterator.hasNext();) {
Map.Entry entry = (Map.Entry) iterator.next();
Xid xid = (Xid) entry.getKey();
recoveredXids[i++] = xid;
Transaction transaction = (Transaction) entry.getValue();
importedTransactions.put(xid, transaction);
}
}
return recoveredXids;
} else {
return new Xid[0];
}
}
/**
* @see javax.resource.spi.XATerminator#rollback(javax.transaction.xa.Xid)
*/
public void rollback(Xid xid) throws XAException {
Transaction importedTransaction;
synchronized (importedTransactions) {
importedTransaction = (Transaction) importedTransactions.remove(xid);
}
if (importedTransaction == null) {
throw new XAException("No imported transaction for xid: " + xid);
}
try {
int status = importedTransaction.getStatus();
assert status == Status.STATUS_ACTIVE || status == Status.STATUS_PREPARED;
} catch (SystemException e) {
throw (XAException)new XAException().initCause(e);
}
rollback(importedTransaction);
}
//XAWork implementation
public void begin(Xid xid, long txTimeoutMillis) throws XAException, InvalidTransactionException, SystemException, ImportedTransactionActiveException {
Transaction importedTransaction;
synchronized (importedTransactions) {
importedTransaction = (Transaction) importedTransactions.get(xid);
if (importedTransaction == null) {
// this does not associate tx with current thread.
importedTransaction = importXid(xid, txTimeoutMillis);
importedTransactions.put(xid, importedTransaction);
}
// associate the the imported transaction with the current thread
try {
resume(importedTransaction);
} catch (InvalidTransactionException e) {
// this occures if our transaciton is associated with another thread
throw (ImportedTransactionActiveException)new ImportedTransactionActiveException(xid).initCause(e);
}
}
}
public void end(Xid xid) throws XAException, SystemException {
synchronized (importedTransactions) {
Transaction importedTransaction = (Transaction) importedTransactions.get(xid);
if (importedTransaction == null) {
throw new XAException("No imported transaction for xid: " + xid);
}
if (importedTransaction != getTransaction()) {
throw new XAException("Imported transaction is not associated with the curren thread xid: " + xid);
}
suspend();
}
}
}