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Java example source code file (HttpRouteDirector.java)

This example source code file (HttpRouteDirector.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

complete, connect_proxy, connect_target, httproutedirector, layer_protocol, routeinfo, tunnel_proxy, tunnel_target, unreachable

The HttpRouteDirector.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
 * 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.conn.routing;

 * Provides directions on establishing a route.
 * Implementations of this interface compare a planned route with
 * a tracked route and indicate the next step required.
 * @since 4.0
public interface HttpRouteDirector {

    /** Indicates that the route can not be established at all. */
    public final static int UNREACHABLE = -1;

    /** Indicates that the route is complete. */
    public final static int COMPLETE = 0;

    /** Step: open connection to target. */
    public final static int CONNECT_TARGET = 1;

    /** Step: open connection to proxy. */
    public final static int CONNECT_PROXY = 2;

    /** Step: tunnel through proxy to target. */
    public final static int TUNNEL_TARGET = 3;

    /** Step: tunnel through proxy to other proxy. */
    public final static int TUNNEL_PROXY = 4;

    /** Step: layer protocol (over tunnel). */
    public final static int LAYER_PROTOCOL = 5;

     * Provides the next step.
     * @param plan      the planned route
     * @param fact      the currently established route, or
     *                  <code>null if nothing is established
     * @return  one of the constants defined in this interface, indicating
     *          either the next step to perform, or success, or failure.
     *          0 is for success, a negative value for failure.
    public int nextStep(RouteInfo plan, RouteInfo fact);


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