com.metamx.common.guava.ExecuteWhenDoneYielder Maven / Gradle / Ivy
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/*
* Druid - a distributed column store.
* Copyright (C) 2012, 2013, 2014 Metamarkets Group Inc.
*
* This program 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 2
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package com.metamx.common.guava;
import java.io.IOException;
import java.util.concurrent.Executor;
public class ExecuteWhenDoneYielder implements Yielder
{
private final Yielder baseYielder;
private final Runnable runnable;
private final Executor executor;
public ExecuteWhenDoneYielder(Yielder baseYielder, Runnable runnable, Executor executor)
{
this.baseYielder = baseYielder;
this.runnable = runnable;
this.executor = executor;
}
@Override
public T get()
{
return baseYielder.get();
}
@Override
public Yielder next(T initValue)
{
return new ExecuteWhenDoneYielder(baseYielder.next(initValue), runnable, executor);
}
@Override
public boolean isDone()
{
return baseYielder.isDone();
}
@Override
public void close() throws IOException
{
if (isDone()) {
executor.execute(runnable);
}
baseYielder.close();
}
}