JMeter example source code file (BeanShellServer.java)

This example JMeter source code file (BeanShellServer.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

beanshell, beanshellserver, class, class, classloader, interpreter, method, non-nls-1, non-nls-1, object, object, problem, reflection, string, string

The JMeter BeanShellServer.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.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import org.apache.jorphan.logging.LoggingManager;
import org.apache.log.Logger;

/**
 * Implements a BeanShell server to allow access to JMeter variables and
 * methods.
 *
 * To enable, define the JMeter property: beanshell.server.port (see
 * JMeter.java) beanshell.server.file (optional, startup file)
 *
 */
public class BeanShellServer implements Runnable {

    private static final Logger log = LoggingManager.getLoggerForClass();

    private final int serverport;

    private final String serverfile;

    /**
     *
     */
    public BeanShellServer(int port, String file) {
        super();
        serverfile = file;// can be the empty string
        serverport = port;
    }

    // For use by the server script
    static String getprop(String s) {
        return JMeterUtils.getPropDefault(s, s);
    }

    // For use by the server script
    static void setprop(String s, String v) {
        JMeterUtils.getJMeterProperties().setProperty(s, v);
    }

    public void run() {

        ClassLoader loader = Thread.currentThread().getContextClassLoader();

        try {
            Class<?> Interpreter = loader.loadClass("bsh.Interpreter");//$NON-NLS-1$
            Object instance = Interpreter.newInstance();
            Class<String> string = String.class;
            Class<Object> object = Object.class;

            Method eval = Interpreter.getMethod("eval", new Class[] { string });//$NON-NLS-1$
            Method setObj = Interpreter.getMethod("set", new Class[] { string, object });//$NON-NLS-1$
            Method setInt = Interpreter.getMethod("set", new Class[] { string, int.class });//$NON-NLS-1$
            Method source = Interpreter.getMethod("source", new Class[] { string });//$NON-NLS-1$

            setObj.invoke(instance, new Object[] { "t", this });//$NON-NLS-1$
            setInt.invoke(instance, new Object[] { "portnum", new Integer(serverport) });//$NON-NLS-1$

            if (serverfile.length() > 0) {
                try {
                    source.invoke(instance, new Object[] { serverfile });
                } catch (InvocationTargetException e1) {
                    log.warn("Could not source " + serverfile);
                    Throwable t= e1.getCause();
                    if (t != null) {
                        log.warn(t.toString());
                    }
                }
            }
            eval.invoke(instance, new Object[] { "setAccessibility(true);" });//$NON-NLS-1$
            eval.invoke(instance, new Object[] { "server(portnum);" });//$NON-NLS-1$

        } catch (ClassNotFoundException e) {
            log.error("Beanshell Interpreter not found");
        } catch (Exception e) {
            log.error("Problem starting BeanShell server ", e);
        }
    }
}