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501f6777 | 1 | /* |
d60dfbe4 | 2 | * Copyright (C) 2015 - EfficiOS Inc., Alexandre Montplaisir <alexmonthy@efficios.com> |
501f6777 CB |
3 | * Copyright (C) 2014 - Christian Babeux <christian.babeux@efficios.com> |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
6 | * of this software and associated documentation files (the "Software"), to | |
7 | * deal in the Software without restriction, including without limitation the | |
8 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or | |
9 | * sell copies of the Software, and to permit persons to whom the Software is | |
10 | * furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
21 | * IN THE SOFTWARE. | |
22 | */ | |
501f6777 | 23 | |
d60dfbe4 AM |
24 | import java.io.IOException; |
25 | ||
26 | import org.apache.log4j.Appender; | |
501f6777 | 27 | import org.apache.log4j.BasicConfigurator; |
8685da11 | 28 | import org.apache.log4j.Logger; |
d60dfbe4 | 29 | import org.lttng.ust.agent.log4j.LttngLogAppender; |
501f6777 | 30 | |
5bfeaeca | 31 | /** |
1820ea46 AM |
32 | * Example application using the LTTng-UST Java log4j agent. |
33 | * | |
34 | * <p> | |
35 | * To obtain LTTng trace events, you should run the following sequence of | |
36 | * commands: | |
37 | * </p> | |
38 | * | |
39 | * <ul> | |
40 | * <li>$ lttng create</li> | |
41 | * <li>$ lttng enable-event -l -a</li> | |
42 | * <li>$ lttng start</li> | |
43 | * <li>(run this program)</li> | |
44 | * <li>$ lttng stop</li> | |
45 | * <li>$ lttng view</li> | |
46 | * <li>$ lttng destroy</li> | |
47 | * </ul> | |
5bfeaeca | 48 | * |
d60dfbe4 | 49 | * @author Alexandre Montplaisir |
5bfeaeca AM |
50 | * @author Christian Babeux |
51 | */ | |
52 | public class Hello { | |
53 | ||
d60dfbe4 | 54 | private static final Logger HELLO_LOG = Logger.getLogger(Hello.class); |
501f6777 | 55 | |
5bfeaeca AM |
56 | /** |
57 | * Application start | |
58 | * | |
59 | * @param args | |
60 | * Command-line arguments | |
d60dfbe4 | 61 | * @throws IOException |
1820ea46 AM |
62 | * If the required native libraries cannot be found. You may |
63 | * have to specify "-Djava.library.path=..." on the "java" | |
64 | * command line. | |
5bfeaeca | 65 | */ |
1820ea46 | 66 | public static void main(String args[]) throws IOException { |
d60dfbe4 | 67 | /* Start with the default Log4j configuration, which logs to console */ |
501f6777 | 68 | BasicConfigurator.configure(); |
d60dfbe4 AM |
69 | |
70 | /* | |
1820ea46 AM |
71 | * Instantiate a LTTng log appender and attach it to the logger, which |
72 | * will now send the logged events to UST. | |
d60dfbe4 AM |
73 | */ |
74 | Appender lttngAppender = new LttngLogAppender(); | |
75 | HELLO_LOG.addAppender(lttngAppender); | |
76 | ||
77 | /* | |
78 | * Here we've set up the appender programmatically, but it could also be | |
79 | * defined at runtime, by reading a configuration file for example: | |
80 | */ | |
81 | // PropertyConfigurator.configure(fileName); | |
501f6777 | 82 | |
1820ea46 | 83 | /* Trigger some tracing events using the Log4j Logger created before. */ |
d60dfbe4 | 84 | HELLO_LOG.info("Hello World, the answer is " + 42); |
1820ea46 AM |
85 | HELLO_LOG.info("Another info event"); |
86 | HELLO_LOG.error("An error event"); | |
501f6777 | 87 | |
1820ea46 AM |
88 | /* Cleanup */ |
89 | HELLO_LOG.removeAppender(lttngAppender); | |
d60dfbe4 | 90 | lttngAppender.close(); |
501f6777 CB |
91 | } |
92 | } |