io.druid.java.util.common.guava.ExecuteWhenDoneYielder Maven / Gradle / Ivy
/*
* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets licenses this file
* to you 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 io.druid.java.util.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
{
boolean done = isDone();
Throwable thrown = null;
try {
baseYielder.close();
}
catch (Throwable t) {
thrown = t;
throw t;
}
finally {
if (done) {
if (thrown != null) {
try {
executor.execute(runnable);
}
catch (Throwable t) {
thrown.addSuppressed(t);
}
} else {
executor.execute(runnable);
}
}
}
}
}