001/* 002 * ==================================================================== 003 * Licensed to the Apache Software Foundation (ASF) under one 004 * or more contributor license agreements. See the NOTICE file 005 * distributed with this work for additional information 006 * regarding copyright ownership. The ASF licenses this file 007 * to you under the Apache License, Version 2.0 (the 008 * "License"); you may not use this file except in compliance 009 * with the License. You may obtain a copy of the License at 010 * 011 * http://www.apache.org/licenses/LICENSE-2.0 012 * 013 * Unless required by applicable law or agreed to in writing, 014 * software distributed under the License is distributed on an 015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 016 * KIND, either express or implied. See the License for the 017 * specific language governing permissions and limitations 018 * under the License. 019 * ==================================================================== 020 * 021 * This software consists of voluntary contributions made by many 022 * individuals on behalf of the Apache Software Foundation. For more 023 * information on the Apache Software Foundation, please see 024 * <http://www.apache.org/>. 025 * 026 */ 027 028package org.apache.http.client; 029 030import org.apache.http.HttpResponse; 031import org.apache.http.protocol.HttpContext; 032 033/** 034 * Strategy interface that allows API users to plug in their own logic to 035 * control whether or not a retry should automatically be done, how many times 036 * it should be retried and so on. 037 * 038 * @since 4.2 039 */ 040public interface ServiceUnavailableRetryStrategy { 041 042 /** 043 * Determines if a method should be retried given the response from the target server. 044 * 045 * @param response the response from the target server 046 * @param executionCount the number of times this method has been 047 * unsuccessfully executed 048 * @param context the context for the request execution 049 050 * @return {@code true} if the method should be retried, {@code false} 051 * otherwise 052 */ 053 boolean retryRequest(HttpResponse response, int executionCount, HttpContext context); 054 055 /** 056 * @return The interval between the subsequent auto-retries. 057 */ 058 long getRetryInterval(); 059 060}