001 /*
002 * Copyright (C) 2010 eXo Platform SAS.
003 *
004 * This is free software; you can redistribute it and/or modify it
005 * under the terms of the GNU Lesser General Public License as
006 * published by the Free Software Foundation; either version 2.1 of
007 * the License, or (at your option) any later version.
008 *
009 * This software is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * You should have received a copy of the GNU Lesser General Public
015 * License along with this software; if not, write to the Free
016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018 */
019
020 package org.crsh.standalone;
021
022 import org.crsh.plugin.PluginContext;
023 import org.crsh.plugin.PluginLifeCycle;
024 import org.crsh.plugin.ServiceLoaderDiscovery;
025 import org.crsh.util.Utils;
026 import org.crsh.vfs.FS;
027 import org.crsh.vfs.Path;
028 import org.slf4j.Logger;
029 import org.slf4j.LoggerFactory;
030
031 import java.io.File;
032 import java.net.URL;
033 import java.net.URLClassLoader;
034 import java.util.List;
035
036 /**
037 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
038 * @version $Revision$
039 */
040 public class Bootstrap extends PluginLifeCycle {
041
042 /** . */
043 protected final Logger log = LoggerFactory.getLogger(getClass());
044
045 /** The mounted path on the file system. */
046 private List<File> bins = Utils.newArrayList();
047
048 /** The mounted path on the file system. */
049 private List<File> confs = Utils.newArrayList();
050
051 /** The class path. */
052 private List<File> jars = Utils.newArrayList();
053
054 /** The base classloader. */
055 private ClassLoader baseLoader;
056
057 public Bootstrap(ClassLoader baseLoader) throws NullPointerException {
058 if (baseLoader == null) {
059 throw new NullPointerException("No null base loader accepted");
060 }
061 this.baseLoader = baseLoader;
062 }
063
064 public Bootstrap addConfPath(File file) {
065 confs.add(file);
066 return this;
067 }
068
069 public Bootstrap addCmdPath(File file) {
070 bins.add(file);
071 return this;
072 }
073
074 public Bootstrap addJarPath(File file) {
075 jars.add(file);
076 return this;
077 }
078
079 public void bootstrap() throws Exception {
080
081 // Compute the url classpath
082 URL[] urls = new URL[jars.size()];
083 for (int i = 0;i < urls.length;i++) {
084 urls[i] = jars.get(i).toURI().toURL();
085 }
086
087 // Create the classloader
088 URLClassLoader classLoader = new URLClassLoader(urls, baseLoader);
089
090 // Create the bin file system
091 FS binFS = new FS();
092 for (File bin : bins) {
093 binFS.mount(bin);
094 }
095 binFS.mount(classLoader, Path.get("/crash/commands/"));
096
097 // Create the conf file system
098 FS confFS = new FS();
099 for (File conf : confs) {
100 confFS.mount(conf);
101 }
102 confFS.mount(classLoader, Path.get("/crash/"));
103
104 // The service loader discovery
105 ServiceLoaderDiscovery discovery = new ServiceLoaderDiscovery(classLoader);
106
107 //
108 StringBuilder info = new StringBuilder("Booting crash with classpath=");
109 info.append(jars).append(" and mounts=[");
110 for (int i = 0;i < bins.size();i++) {
111 if (i > 0) {
112 info.append(',');
113 }
114 info.append(bins.get(i).getAbsolutePath());
115 }
116 info.append(']');
117 log.info(info.toString());
118
119 //
120 PluginContext context = new PluginContext(discovery, binFS, confFS, classLoader);
121 context.refresh();
122 start(context);
123 }
124
125 public void shutdown() {
126 stop();
127 }
128 }