/*
* 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.client;
/**
* Listener to be provided when calling async performRequest methods provided by {@link RestClient}.
* Those methods that do accept a listener will return immediately, execute asynchronously, and notify
* the listener whenever the request yielded a response, or failed with an exception.
*
* <p>
* Note that it is <strong>not</strong> safe to call {@link RestClient#close()} from either of these
* callbacks.
*/
public interface ResponseListener {
/**
* Method invoked if the request yielded a successful response
*/
void onSuccess(Response response);
/**
* Method invoked if the request failed. There are two main categories of failures: connection failures (usually
* {@link java.io.IOException}s, or responses that were treated as errors based on their error response code
* ({@link ResponseException}s).
*/
void onFailure(Exception exception);
}