org.openmdx.kernel.lightweight.transaction.LightweightTransactionSynchronizationRegistry Maven / Gradle / Ivy
/*
* ====================================================================
* Project: openMDX, http://www.openmdx.org/
* Description: Lightweight Transaction Manager Registry
* Owner: OMEX AG, Switzerland, http://www.omex.ch
* ====================================================================
*
* This software is published under the BSD license as listed below.
*
* Copyright (c) 2009-2011, OMEX AG, Switzerland
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of the openMDX team nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* ------------------
*
* This product includes software developed by other organizations as
* listed in the NOTICE file.
*/
package org.openmdx.kernel.lightweight.transaction;
import javax.transaction.Status;
import javax.transaction.Synchronization;
import javax.transaction.SystemException;
import javax.transaction.TransactionSynchronizationRegistry;
/**
* Lightweight Transaction Synchronization Registry
*
* The transaction synchronization registry is a thread-safe proxy.
*/
public final class LightweightTransactionSynchronizationRegistry
implements TransactionSynchronizationRegistry
{
/**
* The transaction synchronization registry instance may be shared
*/
private static volatile TransactionSynchronizationRegistry instance;
/**
* A transaction synchronization registry instance may be shared
*
* @return a transaction synchronization registry instance
*/
public static TransactionSynchronizationRegistry getInstance(){
if(instance == null) {
instance = new LightweightTransactionSynchronizationRegistry();
}
return instance;
}
/**
* Retrieve the active transaction
*
* @return the active transaction
*/
private LightweightTransaction getTransaction(boolean required){
final LightweightTransactionManager transactionManager = LightweightTransactionManager.getInstance();
return required ? transactionManager.getTransaction(true) : transactionManager.getTransaction();
}
/* (non-Javadoc)
* @see javax.transaction.TransactionSynchronizationRegistry#getResource(java.lang.Object)
*/
public Object getResource(Object key) {
return getTransaction(true).managedResources.get(key);
}
/* (non-Javadoc)
* @see javax.transaction.TransactionSynchronizationRegistry#getRollbackOnly()
*/
public boolean getRollbackOnly() {
return getTransactionStatus() == Status.STATUS_MARKED_ROLLBACK;
}
/* (non-Javadoc)
* @see javax.transaction.TransactionSynchronizationRegistry#getTransactionKey()
*/
public Object getTransactionKey() {
final LightweightTransaction transaction = getTransaction(false);
return transaction == null ? null : transaction.xid;
}
/* (non-Javadoc)
* @see javax.transaction.TransactionSynchronizationRegistry#getTransactionStatus()
*/
public int getTransactionStatus() {
final LightweightTransaction transaction = getTransaction(false);
return transaction == null ? Status.STATUS_NO_TRANSACTION : transaction.status;
}
/* (non-Javadoc)
* @see javax.transaction.TransactionSynchronizationRegistry#putResource(java.lang.Object, java.lang.Object)
*/
public void putResource(
Object key,
Object value
) {
getTransaction(true).managedResources.put(key, value);
}
/* (non-Javadoc)
* @see javax.transaction.TransactionSynchronizationRegistry#registerInterposedSynchronization(javax.transaction.Synchronization)
*/
public void registerInterposedSynchronization(Synchronization sync) {
getTransaction(true).interposedSynchronizations.add(sync);
}
/* (non-Javadoc)
* @see javax.transaction.TransactionSynchronizationRegistry#setRollbackOnly()
*/
public void setRollbackOnly(
) {
try {
getTransaction(true).setRollbackOnly();
} catch (SystemException exception) {
throw new RuntimeException(exception);
}
}
}