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Java example source code file (ClientConnectionOperator.java)

This example source code file (ClientConnectionOperator.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

clientconnectionoperator, httpcontext, httphost, httpparams, inetaddress, io, ioexception, net, network, operatedclientconnection

The ClientConnectionOperator.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.conn;

import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;

import org.apache.http.HttpHost;
import org.apache.http.conn.scheme.SocketFactory;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HttpContext;

/**
 * ClientConnectionOperator represents a strategy for creating 
 * {@link OperatedClientConnection} instances and updating the underlying 
 * {@link Socket} of those objects. Implementations will most likely make use 
 * of {@link SocketFactory}s to create {@link Socket} instances.
 * <p>
 * The methods in this interface allow the creation of plain and layered
 * sockets. Creating a tunnelled connection through a proxy, however,
 * is not within the scope of the operator.
 * <p>
 * Implementations of this interface must be thread-safe. Access to shared
 * data must be synchronized as methods of this interface may be executed 
 * from multiple threads.
 *
 * @since 4.0
 */
public interface ClientConnectionOperator {

    /**
     * Creates a new connection that can be operated.
     *
     * @return  a new, unopened connection for use with this operator
     */
    OperatedClientConnection createConnection();

    /**
     * Opens a connection to the given target host.
     *
     * @param conn      the connection to open
     * @param target    the target host to connect to
     * @param local     the local address to route from, or
     *                  <code>null for the default
     * @param context   the context for the connection
     * @param params    the parameters for the connection
     *
     * @throws IOException      in case of a problem
     */
    void openConnection(OperatedClientConnection conn,
                        HttpHost target,
                        InetAddress local,
                        HttpContext context,
                        HttpParams params)
        throws IOException;

    /**
     * Updates a connection with a layered secure connection.
     * The typical use of this method is to update a tunnelled plain
     * connection (HTTP) to a secure TLS/SSL connection (HTTPS).
     *
     * @param conn      the open connection to update
     * @param target    the target host for the updated connection.
     *                  The connection must already be open or tunnelled
     *                  to the host and port, but the scheme of the target
     *                  will be used to create a layered connection.
     * @param context   the context for the connection
     * @param params    the parameters for the updated connection
     *
     * @throws IOException      in case of a problem
     */
    void updateSecureConnection(OperatedClientConnection conn,
                                HttpHost target,
                                HttpContext context,
                                HttpParams params)
        throws IOException;

}

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