// $Header: /home/cvs/jakarta-jmeter/src/core/org/apache/jmeter/util/BeanShellServer.java,v 1.7 2004/03/30 18:08:09 sebb Exp $
/*
 * Copyright 2003-2004 The Apache Software Foundation.
 *
 * Licensed 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 junit.framework.TestCase;

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)
 * 
 * @version $Revision: 1.7 $ Last updated: $Date: 2004/03/30 18:08:09 $
 */
public class BeanShellServer implements Runnable {

	transient private static 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;
	}

    private BeanShellServer(){// do not use!
    	super();
    	serverport=0;
    	serverfile="";
    }
    // For use by the server script
	private static String getprop(String s){
		return JMeterUtils.getPropDefault(s,s);
	}

	private 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");
			Object instance = Interpreter.newInstance();
			Class string = String.class;
			Class object = Object.class;
			
			Method eval =
				Interpreter.getMethod(
					"eval",
					new Class[] {string});
			Method setObj = Interpreter.getMethod(
					"set",
					new Class[] {string,object});
			Method setInt = Interpreter.getMethod(
					"set",
					new Class[] {string,int.class});
			Method source =
				Interpreter.getMethod(
					"source",
					new Class[] {string});
			
			setObj.invoke(instance, new Object[] { "t",this });
			setInt.invoke(instance, new Object[] { "portnum",new Integer(serverport) });

			if (serverfile.length() > 0 ){
				try {
					source.invoke(instance, new Object[]{serverfile});
				} catch (InvocationTargetException e1) {
					log.warn("Could not source "+serverfile);
					//JDK1.4: Throwable t= e1.getCause();
					//JDK1.4: if (t != null) log.warn(t.toString());
				}
			}
			eval.invoke(instance, new Object[]{"setAccessibility(true);"});
			eval.invoke(instance, new Object[]{"server(portnum);"});

		}
		catch(ClassNotFoundException e ){
			log.error("Beanshell Interpreter not found");
		}
		catch (Exception e)
		{
			log.error("Problem starting BeanShell server ",e);
		}
	}
	public static class Test extends TestCase
	{
		//private static Logger log = LoggingManager.getLoggerForClass();

		public Test()
		{
			super();
		}

        public void testServer() throws Exception
        {
        	BeanShellServer bshs = new BeanShellServer(9876,"");
        	assertNotNull(bshs);
        	// Not sure we can test anything else here
        }
        
		public void testProps() throws Exception
		{
			if (JMeterUtils.getJMeterProperties() != null){//Can't test standalone
			assertNotNull("Property user.dir should not be null",getprop("user.dir"));
			setprop("beanshelltest","xyz");
			assertEquals("xyz",getprop("beanshelltest"));
			}
		}
	}
}