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Java example source code file (RequestDirector.java)

This example source code file (RequestDirector.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java tags/keywords

httpcontext, httpexception, httprequest, httpresponse, io, ioexception, requestdirector

The RequestDirector.java example source code

/*
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */

package org.apache.http.client;

import java.io.IOException;

import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.HttpException;
import org.apache.http.protocol.HttpContext;

/**
 * A client-side request director.
 * The director decides which steps are necessary to execute a request.
 * It establishes connections and optionally processes redirects and
 * authentication challenges. The director may therefore generate and
 * send a sequence of requests in order to execute one initial request.
 *
 * @since 4.0
 */
public interface RequestDirector {


    /**
     * Executes a request.
     * <br/>Note:
     * For the time being, a new director is instantiated for each request.
     * This is the same behavior as for <code>HttpMethodDirector
     * in HttpClient 3.
     *
     * @param target    the target host for the request.
     *                  Implementations may accept <code>null
     *                  if they can still determine a route, for example
     *                  to a default target or by inspecting the request.
     * @param request   the request to execute
     * @param context   the context for executing the request
     *
     * @return  the final response to the request.
     *          This is never an intermediate response with status code 1xx.
     *
     * @throws HttpException            in case of a problem
     * @throws IOException              in case of an IO problem
     *                                     or if the connection was aborted
     */
    HttpResponse execute(HttpHost target, HttpRequest request, HttpContext context)
        throws HttpException, IOException;

}

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