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TopLevelTransaction.java
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TopLevelTransaction.java
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/*
* Copyright (c) 2002-2016 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel.impl.coreapi;
import java.util.function.Supplier;
import org.neo4j.graphdb.ConstraintViolationException;
import org.neo4j.graphdb.Lock;
import org.neo4j.graphdb.PropertyContainer;
import org.neo4j.graphdb.TransactionFailureException;
import org.neo4j.graphdb.TransientFailureException;
import org.neo4j.graphdb.TransientTransactionFailureException;
import org.neo4j.kernel.api.security.AccessMode;
import org.neo4j.kernel.api.KernelTransaction;
import org.neo4j.kernel.api.Statement;
import org.neo4j.kernel.api.exceptions.ConstraintViolationTransactionFailureException;
import org.neo4j.kernel.api.exceptions.KernelException;
import org.neo4j.kernel.api.exceptions.Status.Classification;
public class TopLevelTransaction implements InternalTransaction
{
private final static PropertyContainerLocker locker = new PropertyContainerLocker();
private boolean successCalled;
private final Supplier<Statement> stmt;
private final KernelTransaction transaction;
public TopLevelTransaction( KernelTransaction transaction, Supplier<Statement> stmt )
{
this.stmt = stmt;
this.transaction = transaction;
}
@Override
public void failure()
{
transaction.failure();
}
@Override
public void success()
{
successCalled = true;
transaction.success();
}
@Override
public final void terminate()
{
this.transaction.markForTermination();
}
@Override
public void close()
{
try
{
if ( transaction.isOpen() )
{
transaction.close();
}
}
catch ( TransientFailureException e )
{
// We let transient exceptions pass through unchanged since they aren't really transaction failures
// in the same sense as unexpected failures are. Such exception signals that the transaction
// can be retried and might be successful the next time.
throw e;
}
catch ( ConstraintViolationTransactionFailureException e)
{
throw new ConstraintViolationException( e.getMessage(), e );
}
catch ( Exception e )
{
String userMessage = successCalled
? "Transaction was marked as successful, but unable to commit transaction so rolled back."
: "Unable to rollback transaction";
if ( e instanceof KernelException &&
((KernelException)e).status().code().classification() == Classification.TransientError )
{
throw new TransientTransactionFailureException( userMessage, e );
}
throw new TransactionFailureException( userMessage, e );
}
}
@Override
public Lock acquireWriteLock( PropertyContainer entity )
{
return locker.exclusiveLock( stmt, entity );
}
@Override
public Lock acquireReadLock( PropertyContainer entity )
{
return locker.sharedLock(stmt, entity);
}
@Deprecated
public KernelTransaction getTransaction()
{
return transaction;
}
@Override
public KernelTransaction.Type transactionType()
{
return transaction.transactionType();
}
@Override
public AccessMode mode()
{
return transaction.mode();
}
@Override
public KernelTransaction.Revertable restrict( AccessMode mode )
{
return transaction.restrict( mode );
}
}