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 java.io.IOException; 031 032import org.apache.http.protocol.HttpContext; 033 034/** 035 * A handler for determining if an HttpRequest should be retried after a 036 * recoverable exception during execution. 037 * <p> 038 * Implementations of this interface must be thread-safe. Access to shared 039 * data must be synchronized as methods of this interface may be executed 040 * from multiple threads. 041 * 042 * @since 4.0 043 */ 044public interface HttpRequestRetryHandler { 045 046 /** 047 * Determines if a method should be retried after an IOException 048 * occurs during execution. 049 * 050 * @param exception the exception that occurred 051 * @param executionCount the number of times this method has been 052 * unsuccessfully executed 053 * @param context the context for the request execution 054 * 055 * @return {@code true} if the method should be retried, {@code false} 056 * otherwise 057 */ 058 boolean retryRequest(IOException exception, int executionCount, HttpContext context); 059 060}