/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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 org.elasticsearch.action;
import java.util.concurrent.CountDownLatch;
/**
* An action listener that allows passing in a {@link CountDownLatch} that
* will be counted down after onResponse or onFailure is called
*/
public class LatchedActionListener<T> implements ActionListener<T> {
private final ActionListener<T> delegate;
private final CountDownLatch latch;
public LatchedActionListener(ActionListener<T> delegate, CountDownLatch latch) {
this.delegate = delegate;
this.latch = latch;
}
@Override
public void onResponse(T t) {
try {
delegate.onResponse(t);
} finally {
latch.countDown();
}
}
@Override
public void onFailure(Exception e) {
try {
delegate.onFailure(e);
} finally {
latch.countDown();
}
}
}