001/*
002 * Copyright (C) 2012 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 */
019package org.crsh.standalone;
020
021import org.crsh.cli.Usage;
022import org.crsh.cli.descriptor.CommandDescriptor;
023import org.crsh.cli.Argument;
024import org.crsh.cli.Command;
025import org.crsh.cli.Option;
026import org.crsh.cli.impl.lang.CommandFactory;
027import org.crsh.cli.impl.invocation.InvocationMatch;
028import org.crsh.cli.impl.invocation.InvocationMatcher;
029import org.crsh.cli.impl.lang.Instance;
030import org.crsh.cli.impl.lang.Util;
031import org.crsh.shell.Shell;
032import org.crsh.shell.ShellFactory;
033import org.crsh.shell.impl.remoting.RemoteClient;
034import org.crsh.vfs.Path;
035
036import java.io.File;
037import java.lang.instrument.Instrumentation;
038import java.util.Collections;
039import java.util.List;
040import java.util.Map;
041import java.util.Properties;
042import java.util.logging.Level;
043import java.util.logging.Logger;
044
045public class Agent {
046
047  /** . */
048  private static Logger log = Logger.getLogger(Agent.class.getName());
049
050  public static void agentmain(final String agentArgs, final Instrumentation inst) throws Exception {
051    log.log(Level.INFO, "CRaSH agent loaded");
052
053    //
054    Thread t = new Thread() {
055      @Override
056      public void run() {
057        try {
058          CommandDescriptor<Instance<Agent>> c = CommandFactory.DEFAULT.create(Agent.class);
059          InvocationMatcher<Instance<Agent>> matcher = c.matcher();
060          InvocationMatch<Instance<Agent>> match = matcher.parse(agentArgs);
061          match.invoke(Util.wrap(new Agent(inst)));
062        } catch (Exception e) {
063          e.printStackTrace();
064        }
065      }
066    };
067
068    //
069    t.start();
070    log.log(Level.INFO, "Spawned CRaSH thread " + t.getId() + " for further processing");
071  }
072
073  /** . */
074  private final Instrumentation instrumentation;
075
076  public Agent(Instrumentation instrumentation) {
077    this.instrumentation = instrumentation;
078  }
079
080  @Command
081  public void main(
082      @Option(names={"c","cmd"})
083      @Usage("adds a dir to the command path")
084      List<String> cmds,
085      @Option(names={"conf"})
086      @Usage("adds a dir to the conf path")
087      List<String> confs,
088      @Option(names={"p","property"})
089      @Usage("set a property of the form a=b")
090      List<String> properties,
091      @Option(names = {"cmd-mode"})
092      @Usage("the cmd mode (read or copy), copy mode requires at least one cmd path to be specified")
093      ResourceMode cmdMode,
094      @Option(names = {"conf-mode"})
095      @Usage("the conf mode (read of copy), copy mode requires at least one conf path to be specified")
096      ResourceMode confMode,
097      @Argument(name = "port")
098    Integer port) throws Exception {
099
100    //
101    boolean copyCmd = cmdMode != ResourceMode.read && cmds != null && cmds.size() > 0;
102    boolean copyConf = confMode != ResourceMode.read && confs != null && confs.size() > 0;
103
104    //
105    Bootstrap bootstrap = new Bootstrap(Thread.currentThread().getContextClassLoader());
106
107    //
108    if (!copyCmd) {
109      bootstrap.addToCmdPath(Path.get("/crash/commands/"));
110    }
111    if (cmds != null) {
112      for (String cmd : cmds) {
113        File cmdPath = new File(cmd);
114        bootstrap.addToCmdPath(cmdPath);
115      }
116    }
117
118
119    //
120    if (!copyConf) {
121      bootstrap.addToConfPath(Path.get("/crash/"));
122    }
123    if (confs != null) {
124      for (String conf : confs) {
125        File confPath = new File(conf);
126        bootstrap.addToConfPath(confPath);
127      }
128    }
129
130    //
131    if (properties != null) {
132      Properties config = new Properties();
133      for (String property : properties) {
134        int index = property.indexOf('=');
135        if (index == -1) {
136          config.setProperty(property, "");
137        } else {
138          config.setProperty(property.substring(0, index), property.substring(index + 1));
139        }
140      }
141      bootstrap.setConfig(config);
142    }
143
144    // Set the instrumentation available as an attribute
145    Map<String, Object> attributes = Collections.<String, Object>singletonMap("instrumentation", instrumentation);
146    bootstrap.setAttributes(attributes);
147
148    // Do bootstrap
149    bootstrap.bootstrap();
150
151    //
152    if (port != null) {
153      try {
154        ShellFactory factory = bootstrap.getContext().getPlugin(ShellFactory.class);
155        Shell shell = factory.create(null);
156        RemoteClient client = new RemoteClient(port, shell);
157        log.log(Level.INFO, "Callback back remote on port " + port);
158        client.connect();
159        client.getRunnable().run();
160      }
161      finally {
162        bootstrap.shutdown();
163      }
164    }
165  }
166}