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.protocol; 029 030import org.apache.http.HttpRequestInterceptor; 031import org.apache.http.HttpResponseInterceptor; 032 033/** 034 * HTTP protocol processor is a collection of protocol interceptors that 035 * implements the 'Chain of Responsibility' pattern, where each individual 036 * protocol interceptor is expected to work on a particular aspect of the HTTP 037 * protocol the interceptor is responsible for. 038 * <p> 039 * Usually the order in which interceptors are executed should not matter as 040 * long as they do not depend on a particular state of the execution context. 041 * If protocol interceptors have interdependencies and therefore must be 042 * executed in a particular order, they should be added to the protocol 043 * processor in the same sequence as their expected execution order. 044 * <p> 045 * Protocol interceptors must be implemented as thread-safe. Similarly to 046 * servlets, protocol interceptors should not use instance variables unless 047 * access to those variables is synchronized. 048 * 049 * @since 4.0 050 */ 051public interface HttpProcessor 052 extends HttpRequestInterceptor, HttpResponseInterceptor { 053 054 // no additional methods 055}