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