content: /*
   *  Copyright Beijing 58 Information Technology Co.,Ltd.
   *
   *  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 com.bj58.spat.gaea.server.deploy.hotdeploy;
  
  import java.lang.reflect.Method;
  import java.net.MalformedURLException;
  import java.net.URL;
  import java.net.URLClassLoader;
  import java.util.List;
  
  import sun.misc.Launcher;
  
  import com.bj58.spat.gaea.server.contract.log.ILog;
  import com.bj58.spat.gaea.server.contract.log.LogFactory;
  import com.bj58.spat.gaea.server.util.FileHelper;
  
  /**
   * A class for load jar
   * 
   * @author Service Platform Architecture Team (spat@58.com)
   */
  @SuppressWarnings("restriction")
  public class GlobalClassLoader {
  	
  	private static ILog logger = LogFactory.getLogger(GlobalClassLoader.class);
  
  	private static Method addURL;
  
  	static {
  		try {
  			addURL = URLClassLoader.class.getDeclaredMethod("addURL",
  					new Class[] { URL.class });
  		} catch (Exception e) {
  			e.printStackTrace();
  		}
  		addURL.setAccessible(true);
  	}
  
  	private static URLClassLoader system = (URLClassLoader) getSystemClassLoader();
  
  	private static URLClassLoader ext = (URLClassLoader) getExtClassLoader();
  
  	public static ClassLoader getSystemClassLoader() {
  		return ClassLoader.getSystemClassLoader();
  	}
  
  	public static ClassLoader getExtClassLoader() {
  		return getSystemClassLoader().getParent();
  	}
  
  	public static void addURL2SystemClassLoader(URL url) throws Exception {
  		try {
  			logger.info("append jar to classpath:" + url.toString());
  			addURL.invoke(system, new Object[] { url });
  		} catch (Exception e) {
  			throw e;
  		}
  	}
  
  	public static void addURL2ExtClassLoader(URL url) throws Exception {
  		try {
  			logger.info("append jar to classpath:" + url.toString());
  			addURL.invoke(ext, new Object[] { url });
  		} catch (Exception e) {
  			throw e;
  		}
  	}
  
  	public static void addSystemClassPath(String path) throws Exception {
  		try {
  			URL url = new URL("file", "", path);
  			addURL2SystemClassLoader(url);
  		} catch (MalformedURLException e) {
  			throw e;
  		}
  	}
  
  	public static void addExtClassPath(String path) throws Exception {
  		try {
  			URL url = new URL("file", "", path);
  			addURL2ExtClassLoader(url);
  		} catch (MalformedURLException e) {
  			throw e;
  		}
  	}
  
  	public static void addSystemClassPathFolder(String... dirs)
  			throws Exception {
  		List<String> jarList = FileHelper.getUniqueLibPath(dirs);
  		for (String jar : jarList) {
  			addSystemClassPath(jar);
  		}
  	}
  
  	public static void addURL2ExtClassLoaderFolder(String... dirs)
  			throws Exception {
  		List<String> jarList = FileHelper.getUniqueLibPath(dirs);
  		for (String jar : jarList) {
  			addExtClassPath(jar);
  		}
  	}
  
  	public static URL[] getBootstrapURLs() {
  		return Launcher.getBootstrapClassPath().getURLs();
  	}
  
  	public static URL[] getSystemURLs() {
  		return system.getURLs();
  	}
  
  	public static URL[] getExtURLs() {
  		return ext.getURLs();
  	}
  }