JMeter example source code file (DynamicClassLoader.java)

This example JMeter source code file (DynamicClassLoader.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

classloader, classloader, dynamicclassloader, dynamicclassloader, net, network, override, override, urlclassloader, urlstreamhandlerfactory, urlstreamhandlerfactory

The JMeter DynamicClassLoader.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;

import java.net.URL;
import java.net.URLClassLoader;
import java.net.URLStreamHandlerFactory;

/**
 * This is a basic URL classloader for loading new resources
 * dynamically.
 *
 * It allows public access to the addURL() method.
 *
 * It also adds a convenience method to update the current thread classloader
 *
 */
public class DynamicClassLoader extends URLClassLoader {

    public DynamicClassLoader(URL[] urls) {
        super(urls);
    }

    public DynamicClassLoader(URL[] urls, ClassLoader parent) {
        super(urls, parent);
    }

    public DynamicClassLoader(URL[] urls, ClassLoader parent,
            URLStreamHandlerFactory factory) {
        super(urls, parent, factory);
    }

    // Make the addURL method visible
    @Override
    public void addURL(URL url) {
        super.addURL(url);
    }

    /**
     *
     * @param urls - list of URLs to add to the thread's classloader
     */
    public static void updateLoader(URL [] urls) {
        DynamicClassLoader loader
            = (DynamicClassLoader) Thread.currentThread().getContextClassLoader();
        for(int i=0;i<urls.length;i++) {
            loader.addURL(urls[i]);
        }
    }
}