JMeter example source code file (SlowSocket.java)

This example JMeter source code file (SlowSocket.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 - JMeter tags/keywords

cps, cps=cps, cps=cps, illegalargumentexception, inetaddress, inetsocketaddress, io, ioexception, ioexception, net, network, override, slowsocket, slowsocket, speed, string, string

The JMeter SlowSocket.java 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.
 *
 */

package org.apache.jmeter.util;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.net.UnknownHostException;

/**
 * "Slow"  (non-SSL) socket implementation to emulate dial-up modems etc
 */
public class SlowSocket extends Socket {

    private final int CPS; // Characters per second to emulate

    public SlowSocket(final int cps, String host, int port, InetAddress localAddress, int localPort, int timeout) throws IOException {
        super();
        if (cps <=0) {
            throw new IllegalArgumentException("Speed (cps) <= 0");
        }
        CPS=cps;
        // This sequence is borrowed from:
        // org.apache.commons.httpclient.protocol.ReflectionSocketFactory.createSocket
        SocketAddress localaddr = new InetSocketAddress(localAddress, localPort);
        SocketAddress remoteaddr = new InetSocketAddress(host, port);
        bind(localaddr);
        connect(remoteaddr, timeout);
    }

    /**
     *
     * @param cps characters per second
     * @param host hostname
     * @param port port
     * @param localAddr local address
     * @param localPort local port
     *
     * @throws IOException
     * @throws IllegalArgumentException if cps <=0
     */
    public SlowSocket(int cps, String host, int port, InetAddress localAddr, int localPort) throws IOException {
        super(host, port, localAddr, localPort);
        if (cps <=0) {
            throw new IllegalArgumentException("Speed (cps) <= 0");
        }
        CPS=cps;
    }

    /**
     *
     * @param cps characters per second
     * @param host hostname
     * @param port port
     *
     * @throws UnknownHostException
     * @throws IOException
     * @throws IllegalArgumentException if cps <=0
     */
    public SlowSocket(int cps, String host, int port) throws UnknownHostException, IOException {
        super(host, port);
        if (cps <=0) {
            throw new IllegalArgumentException("Speed (cps) <= 0");
        }
        CPS=cps;
    }

    // Override so we can intercept the stream
    @Override
    public OutputStream getOutputStream() throws IOException {
        return new SlowOutputStream(super.getOutputStream(), CPS);
    }

    // Override so we can intercept the stream
    @Override
    public InputStream getInputStream() throws IOException {
        return new SlowInputStream(super.getInputStream(), CPS);
    }

}