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/*****************************************************************************
* Copyright (c) 2010 CEA LIST.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Remi Schnekenburger (CEA LIST) remi.schnekenburger@cea.fr - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.views.properties.runtime.modelhandler.emf;
import org.eclipse.emf.transaction.Transaction;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.emf.transaction.impl.InternalTransaction;
import org.eclipse.emf.transaction.impl.InternalTransactionalEditingDomain;
/**
* Utility class for transactions
*/
public class TransactionUtil {
/**
* Checks if the current active transaction is a Write transaction or not
* unprotected transaction are not considered write transaction
*
* @param internalEditingDomain
* the current internal editing domain, on which transaction are run
* @param includeUnprotected
* <code>boolean</code> value that if <code>true</code> will consider unprotected
* transactions when determining if a write transaction is in progress.
* @param otherThread
* <code>boolean</code> value that if <code>true</code>, will verify whether there is
* an active transaction only when on a different thread then the caller. This is useful to determine if a
* deadlock scenario will occur.
* @return <code>true</code> if the current active transaction is a write transaction
*/
public static boolean isReadTransactionInProgress(TransactionalEditingDomain internalEditingDomain, boolean includeUnprotected, boolean otherThread) {
if(!(internalEditingDomain instanceof InternalTransactionalEditingDomain)) {
return false;
}
InternalTransaction transaction = ((InternalTransactionalEditingDomain)internalEditingDomain).getActiveTransaction();
if(transaction != null && transaction.isReadOnly()) {
if(includeUnprotected) {
Object unprotectedMode = transaction.getOptions().get(Transaction.OPTION_UNPROTECTED);
if(Boolean.FALSE.equals(unprotectedMode)) {
return false;
}
}
if(otherThread && Thread.currentThread() != transaction.getOwner())
return true;
else if(!otherThread) {
return true;
}
return true;
}
return false;
}
}
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