com.metamx.common.guava.ExecuteWhenDoneYielder Maven / Gradle / Ivy
/*
* Copyright 2011,2012 Metamarkets Group Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
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();
}
}