/**
* Copyright (c) 2002-2012 "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 Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.cluster;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.AbstractExecutorService;
import java.util.concurrent.TimeUnit;
/**
* Executor that executes the Runnables when drain() is called. Allows asynch jobs to be scheduled, and then
* run in a synchronous fashion.
*/
public class DelayedDirectExecutor
extends AbstractExecutorService
{
List<Runnable> runnables = new ArrayList<Runnable>();
@Override
public void shutdown()
{
}
@Override
public List<Runnable> shutdownNow()
{
return Collections.emptyList();
}
@Override
public boolean isShutdown()
{
return false;
}
@Override
public boolean isTerminated()
{
return false;
}
@Override
public boolean awaitTermination( long timeout, TimeUnit unit ) throws InterruptedException
{
return true;
}
@Override
public void execute( Runnable command )
{
runnables.add( command );
}
public void drain()
{
List<Runnable> current = runnables;
runnables = new ArrayList<Runnable>();
for ( Runnable runnable : current )
{
try
{
runnable.run();
}
catch ( Throwable e )
{
e.printStackTrace();
}
}
}
}