/*
* 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 org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportResponseHandler;
import org.elasticsearch.transport.TransportException;
import org.elasticsearch.transport.TransportResponse;
import java.util.Objects;
import java.util.function.Supplier;
/**
* A simple base class for action response listeners, defaulting to using the SAME executor (as its
* very common on response handlers).
*/
public class ActionListenerResponseHandler<Response extends TransportResponse> implements TransportResponseHandler<Response> {
private final ActionListener<? super Response> listener;
private final Supplier<Response> responseSupplier;
public ActionListenerResponseHandler(ActionListener<? super Response> listener, Supplier<Response> responseSupplier) {
this.listener = Objects.requireNonNull(listener);
this.responseSupplier = Objects.requireNonNull(responseSupplier);
}
@Override
public void handleResponse(Response response) {
listener.onResponse(response);
}
@Override
public void handleException(TransportException e) {
listener.onFailure(e);
}
@Override
public Response newInstance() {
return responseSupplier.get();
}
@Override
public String executor() {
return ThreadPool.Names.SAME;
}
}