| 1 | /** |
| 2 | * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 3 | * Copyright (C) 2012 Alexandre Montplaisir <alexandre.montplaisir@polymtl.ca> |
| 4 | * |
| 5 | * This library is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU Lesser General Public |
| 7 | * License as published by the Free Software Foundation; only |
| 8 | * version 2.1 of the License. |
| 9 | * |
| 10 | * This library is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * Lesser General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU Lesser General Public |
| 16 | * License along with this library; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | */ |
| 19 | |
| 20 | package org.lttng.ust.jul; |
| 21 | |
| 22 | /** |
| 23 | * This class implements the the Java side of the LTTng-UST Java interface. |
| 24 | * |
| 25 | * First, make sure you have installed "liblttng-ust-java.so" where the linker |
| 26 | * can find it. You can then call LTTngUst.init() from your Java program to |
| 27 | * connect the methods exposed here to the native library. |
| 28 | * |
| 29 | * Because of limitations in the probe declaration, all trace events generated |
| 30 | * by this library will have "lttng_ust_java" for domain, and "<type>_event" for |
| 31 | * event name in the CTF trace files. The "name" parameter will instead appear |
| 32 | * as the first element of the event's payload. |
| 33 | * |
| 34 | * @author Mathieu Desnoyers |
| 35 | * @author Alexandre Montplaisir |
| 36 | * @author David Goulet |
| 37 | * |
| 38 | */ |
| 39 | public abstract class LTTngUst { |
| 40 | /** |
| 41 | * Initialize the UST tracer. This should always be called first, before any |
| 42 | * tracepoint* method. |
| 43 | */ |
| 44 | public static void init() { |
| 45 | System.loadLibrary("lttng-ust-jul-jni"); //$NON-NLS-1$ |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * Insert a tracepoint for JUL event. |
| 50 | * |
| 51 | * @param msg |
| 52 | * Raw message provided by the JUL API. |
| 53 | * @param logger_name |
| 54 | * Logger name that trigger this event. |
| 55 | * @param class_name |
| 56 | * Name of the class that (allegedly) issued the logging request. |
| 57 | * @param method_name |
| 58 | * Name of the method that (allegedly) issued the logging request. |
| 59 | * @param millis |
| 60 | * Event time in milliseconds since 1970. |
| 61 | * @param log_level |
| 62 | * Log level of the event from JUL. |
| 63 | * @param thread_id |
| 64 | * Identifier for the thread where the message originated. |
| 65 | */ |
| 66 | |
| 67 | /* Use for a user session daemon. */ |
| 68 | public static native void tracepointU(String msg, String logger_name, String class_name, |
| 69 | String method_name, long millis, int log_level, int thread_id); |
| 70 | |
| 71 | /* Use for a root session daemon. */ |
| 72 | public static native void tracepointS(String msg, String logger_name, String class_name, |
| 73 | String method_name, long millis, int log_level, int thread_id); |
| 74 | } |