doc/examples/java-log4j/Hello.java

   1 /*
   2  * Copyright (C) 2014 - Christian Babeux <christian.babeux@efficios.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to
   6  * deal in the Software without restriction, including without limitation the
   7  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   8  * sell copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  20  * IN THE SOFTWARE.
  21  */
  22
  23 import org.apache.log4j.BasicConfigurator;
  24 import org.apache.log4j.Logger;
  25 import org.lttng.ust.agent.LTTngAgent;
  26
  27 /**
  28  * Example application using the LTTng-UST Java JUL agent.
  29  *
  30  * @author Christian Babeux
  31  */
  32 public class Hello {
  33
  34         /* Of course :) */
  35         private static final int answer = 42;
  36
  37         static Logger helloLog = Logger.getLogger(Hello.class);
  38
  39         private static LTTngAgent lttngAgent;
  40
  41         /**
  42          * Application start
  43          *
  44          * @param args
  45          *            Command-line arguments
  46          * @throws Exception
  47          */
  48         public static void main(String args[]) throws Exception {
  49                 BasicConfigurator.configure();
  50                 lttngAgent = LTTngAgent.getLTTngAgent();
  51
  52                 /*
  53                  * Gives you time to do some lttng commands before any event is hit.
  54                  */
  55                 Thread.sleep(5000);
  56
  57                 /* Trigger a tracing event using the JUL Logger created before. */
  58                 helloLog.info("Hello World, the answer is " + answer);
  59
  60                 System.out.println("Firing hello delay in 5 seconds...");
  61                 Thread.sleep(5000);
  62                 helloLog.info("Hello World delayed...");
  63
  64                 lttngAgent.dispose();
  65         }
  66 }