JMeter example source code file (JexlEngine.java)

This example JMeter source code file (JexlEngine.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

bsfdeclaredbean, bsfexception, bsfexception, exception, exception, file, io, net, network, object, object, override, override, reflection, script, string, suppresswarnings, url, util

The JMeter JexlEngine.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.commons.jexl.bsf;

import java.io.File;
import java.lang.reflect.Method;
import java.net.URL;
import java.util.Vector;

import org.apache.bsf.BSFDeclaredBean;
import org.apache.bsf.BSFException;
import org.apache.bsf.BSFManager;
import org.apache.bsf.util.BSFEngineImpl;

import org.apache.commons.jexl.JexlContext;
import org.apache.commons.jexl.JexlHelper;
import org.apache.commons.jexl.Script;
import org.apache.commons.jexl.ScriptFactory;
//import org.apache.jorphan.logging.LoggingManager;
//import org.apache.log.Logger;

// See JIRA: JEXL-39

/**
 * BSFEngine for Commons JEXL.
 */
public class JexlEngine extends BSFEngineImpl {

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

    private JexlContext jc;

    /** {@inheritDoc} */
    @SuppressWarnings("unchecked") // super-class does not use generics
    @Override
    public void initialize(BSFManager mgr, String lang,
            @SuppressWarnings("rawtypes") Vector declaredBeans) // super-class does not use generics
            throws BSFException {
        super.initialize(mgr, lang, declaredBeans);
        jc = JexlHelper.createContext();
        for (int i = 0; i < declaredBeans.size(); i++) {
            BSFDeclaredBean bean = (BSFDeclaredBean) declaredBeans.elementAt(i);
            jc.getVars().put(bean.name, bean.bean);
        }
    }

    /** {@inheritDoc} */
    @Override
    public void terminate() {
        if (jc != null) {
            jc.getVars().clear();
            jc = null;
        }
    }

    /** {@inheritDoc} */
    @SuppressWarnings("unchecked")
    @Override
    public void declareBean(BSFDeclaredBean bean) throws BSFException {
        jc.getVars().put(bean.name, bean.bean);
    }

    /** {@inheritDoc} */
    @Override
    public void undeclareBean(BSFDeclaredBean bean) throws BSFException {
        jc.getVars().remove(bean.name);
    }

    /** {@inheritDoc} */
    public Object eval(String fileName, int lineNo, int colNo, Object expr)
            throws BSFException {
        if (expr == null) {
            return null;
        }
        try {
            Script jExpr = null;
            if (expr instanceof File) {
                jExpr = ScriptFactory.createScript((File) expr);
            } else if (expr instanceof URL) {
                jExpr = ScriptFactory.createScript((URL) expr);
            } else {
                jExpr = ScriptFactory.createScript((String) expr);
            }
            return jExpr.execute(jc);
        } catch (Exception e) {
            // TODO Better messages
            throw new BSFException(e.getMessage());
        }
    }

    /** {@inheritDoc} */
    @Override
    public void exec(String fileName, int lineNo, int colNo, Object script)
            throws BSFException {
        if (script == null) {
            return;
        }
        try {
            Script jExpr = null;
            if (script instanceof File) {
                jExpr = ScriptFactory.createScript((File) script);
            } else if (script instanceof URL) {
                jExpr = ScriptFactory.createScript((URL) script);
            } else {
                jExpr = ScriptFactory.createScript((String) script);
            }
            jExpr.execute(jc);
        } catch (Exception e) {
            throw new BSFException(e.getMessage());
        }
    }

    /** {@inheritDoc} */
    @Override
    public void iexec(String fileName, int lineNo, int colNo, Object script)
            throws BSFException {
        exec(fileName, lineNo, colNo, script);
    }

    /** {@inheritDoc} */
    public Object call(Object object, String name, Object[] args)
            throws BSFException {
        try {
            Class<?>[] types = new Class[args.length];
            for (int i = 0; i < args.length; i++) {
                types[i] = args[i].getClass();
            }
            Method m = object.getClass().getMethod(name, types);
            return m.invoke(object, args);
        } catch (Exception e) {
            throw new BSFException(e.getMessage());
        }
    }

}