1 /* 2 * ==================================================================== 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * ==================================================================== 20 * 21 * This software consists of voluntary contributions made by many 22 * individuals on behalf of the Apache Software Foundation. For more 23 * information on the Apache Software Foundation, please see 24 * <http://www.apache.org/>. 25 * 26 */ 27 28 package org.apache.hc.core5.http.protocol; 29 30 import org.apache.hc.core5.annotation.Contract; 31 import org.apache.hc.core5.annotation.ThreadingBehavior; 32 import org.apache.hc.core5.http.HttpRequestInterceptor; 33 import org.apache.hc.core5.http.HttpResponseInterceptor; 34 35 /** 36 * HTTP protocol processor is a collection of protocol interceptors that 37 * implements the 'Chain of Responsibility' pattern, where each individual 38 * protocol interceptor is expected to work on a particular aspect of the HTTP 39 * protocol the interceptor is responsible for. 40 * <p> 41 * Usually the order in which interceptors are executed should not matter as 42 * long as they do not depend on a particular state of the execution context. 43 * If protocol interceptors have interdependencies and therefore must be 44 * executed in a particular order, they should be added to the protocol 45 * processor in the same sequence as their expected execution order. 46 * <p> 47 * Protocol interceptors must be implemented as thread-safe. Similarly to 48 * servlets, protocol interceptors should not use instance variables unless 49 * access to those variables is synchronized. 50 * 51 * @since 4.0 52 */ 53 @Contract(threading = ThreadingBehavior.STATELESS) 54 public interface HttpProcessor extends HttpRequestInterceptor, HttpResponseInterceptor { 55 }