projects / lttng-ust.git / blame
| Commit | Line | Data |
|---|---|---|
| c71dfbd5 CB |
1 | The agent can now be built in three different configurations: |
| 2 | ||
| 3 | 1) Java agent with JUL support: | |
| 4 | ||
| 5 | $ ./configure --enable-java-agent-jul | |
| 6 | ||
| 7 | 2) Java agent with Log4j support: | |
| 8 | ||
| 9 | $ export CLASSPATH=$CLASSPATH:/path/to/log4j.jar | |
| 10 | $ ./configure --enable-java-agent-log4j | |
| 11 | ||
| 12 | 3) Java agent with JUL + Log4j support | |
| 13 | ||
| 14 | $ export CLASSPATH=$CLASSPATH:/path/to/log4j.jar | |
| 15 | $ ./configure --enable-java-agent-all | |
| 16 | ||
| 17 | To build the agent with log4j support, make sure that the log4j jar | |
| 18 | is in your Java classpath. | |
| 19 | ||
| 20 | The configure script will automatically detect the appropriate Java | |
| 21 | binaries to use in order to build the Java agent. | |
| 22 | ||
| 23 | The name of the agent jar file is now "liblttng-ust-agent.jar". | |
| 24 | It will be installed in the arch-agnostic "$prefix/share/java" path | |
| 25 | e.g: "/usr/share/java". | |
| 26 | ||
| 27 | In order to support older applications using the "org.lttng.ust.jul" | |
| 28 | package, a transitional package is built with the same name. | |
| 29 | ||
| 30 | All applications should move to use the "org.lttng.ust.agent" package. | |
| 31 | ||
| 32 | After building, you can use the "liblttng-ust-agent.jar" file in a | |
| 33 | Java project. Depending on your configuration, the agent will | |
| 34 | requires shared objects (e.g: "liblttng-ust-jul.so") which is installed | |
| 35 | by the build system when doing "make install". Make sure that your | |
| 36 | Java application can find this shared object with the | |
| 37 | "java.library.path". | |
| 38 | ||
| 39 | In order to enable the agent in your Java application, you simply have to add | |
| 40 | this as early as you can in the runtime process. | |
| 41 | ||
| 42 | import org.lttng.ust.agent.LTTngAgent; | |
| 43 | [...] | |
| 44 | private static LTTngAgent lttngAgent; | |
| 45 | [...] | |
| 46 | lttngAgent = LTTngAgent.getLTTngAgent(); | |
| 47 | ||
| 48 | This will initialize automatically the singleton LTTngAgent, and will | |
| 49 | return when the session daemon registration is done. If no session daemon is | |
| 50 | available, the execution will continue and the agent will retry every | |
| 51 | 3 seconds. |