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.Collections;
035    import java.util.List;
036    import java.util.Map;
037    
038    /**
039     * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
040     * @version $Revision$
041     */
042    public class Bootstrap extends PluginLifeCycle {
043    
044      /** . */
045      protected final Logger log = LoggerFactory.getLogger(getClass());
046    
047      /** The mounted path on the file system. */
048      private List<File> cmds = Utils.newArrayList();
049    
050      /** The mounted path on the file system. */
051      private List<File> confs = Utils.newArrayList();
052    
053      /** The class path. */
054      private List<File> jars = Utils.newArrayList();
055    
056      /** The base classloader. */
057      private ClassLoader baseLoader;
058    
059      /** The attributes. */
060      private Map<String, ?> attributes;
061    
062      public Bootstrap(ClassLoader baseLoader) throws NullPointerException {
063        if (baseLoader == null) {
064          throw new NullPointerException("No null base loader accepted");
065        }
066        this.baseLoader = baseLoader;
067        this.attributes = Collections.emptyMap();
068      }
069    
070      public void setAttributes(Map<String, ?> attributes) {
071        this.attributes = attributes;
072      }
073    
074      public Bootstrap addConfPath(File file) {
075        confs.add(file);
076        return this;
077      }
078    
079      public Bootstrap addCmdPath(File file) {
080        cmds.add(file);
081        return this;
082      }
083    
084      public Bootstrap addJarPath(File file) {
085        jars.add(file);
086        return this;
087      }
088    
089      public void bootstrap() throws Exception {
090    
091        // Compute the url classpath
092        URL[] urls = new URL[jars.size()];
093        for (int i = 0;i < urls.length;i++) {
094          urls[i] = jars.get(i).toURI().toURL();
095        }
096    
097        // Create the classloader
098        URLClassLoader classLoader = new URLClassLoader(urls, baseLoader);
099    
100        // Create the cmd file system
101        FS cmdFS = new FS();
102        for (File cmd : cmds) {
103          cmdFS.mount(cmd);
104        }
105    
106        // Add the classloader
107        cmdFS.mount(classLoader, Path.get("/crash/commands/"));
108    
109        // Create the conf file system
110        FS confFS = new FS();
111        for (File conf : confs) {
112          confFS.mount(conf);
113        }
114        confFS.mount(classLoader, Path.get("/crash/"));
115    
116        // The service loader discovery
117        ServiceLoaderDiscovery discovery = new ServiceLoaderDiscovery(classLoader);
118    
119        //
120        StringBuilder info = new StringBuilder("Booting crash with classpath=");
121        info.append(jars).append(" and mounts=[");
122        for (int i = 0;i < cmds.size();i++) {
123          if (i > 0) {
124            info.append(',');
125          }
126          info.append(cmds.get(i).getAbsolutePath());
127        }
128        info.append(']');
129        log.info(info.toString());
130    
131        //
132        PluginContext context = new PluginContext(
133          discovery,
134          attributes,
135          cmdFS,
136          confFS,
137          classLoader);
138    
139        //
140        context.refresh();
141    
142        //
143        start(context);
144      }
145    
146      public void shutdown() {
147        stop();
148      }
149    }