JMeter example source code file (SlowOutputStream.java)

This example JMeter source code file (SlowOutputStream.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

cpspauser, cpspauser, filteroutputstream, io, ioexception, ioexception, override, override, slowoutputstream, slowoutputstream

The JMeter SlowOutputStream.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.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;

/**
 * OutputStream filter to emulate a slow device, e.g. modem
 *
 */
public class SlowOutputStream extends FilterOutputStream {

    private final CPSPauser pauser;

    /**
     * Create wrapped Output Stream toe emulate the requested CPS.
     * @param out OutputStream
     * @param cps characters per second
     */
    public SlowOutputStream(OutputStream out, int cps) {
        super(out);
        pauser = new CPSPauser(cps);
    }

    // Also handles write(byte[])
    @Override
    public void write(byte[] b, int off, int len) throws IOException {
        pauser.pause(len);
        out.write(b, off, len);
    }

    @Override
    public void write(int b) throws IOException {
        pauser.pause(1);
        out.write(b);
    }
}