liblttng-ust-java-agent/java/org/lttng/ust/agent/jul/LTTngLogHandler.java

   1 /*
   2  * Copyright (C) 2013 - David Goulet <dgoulet@efficios.com>
   3  *
   4  * This library is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU Lesser General Public License, version 2.1 only,
   6  * as published by the Free Software Foundation.
   7  *
   8  * This library is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
  11  * for more details.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public License
  14  * along with this library; if not, write to the Free Software Foundation,
  15  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  16  */
  17
  18 package org.lttng.ust.agent.jul;
  19
  20 import java.lang.String;
  21
  22 import java.util.logging.Handler;
  23 import java.util.logging.LogRecord;
  24
  25 class LTTngLogHandler extends Handler {
  26         private Boolean is_root;
  27
  28         public LTTngLogHandler(Boolean isRoot) {
  29                 super();
  30                 this.is_root = isRoot;
  31                 /* Initialize LTTng UST tracer. */
  32                 try {
  33                         System.loadLibrary("lttng-ust-jul-jni"); //$NON-NLS-1$
  34                 } catch (SecurityException e) {
  35                         e.printStackTrace();
  36                 } catch (UnsatisfiedLinkError e) {
  37                         e.printStackTrace();
  38                 } catch (NullPointerException e) {
  39                         /* Should never happen */
  40                         e.printStackTrace();
  41                 }
  42         }
  43
  44         public Boolean isRoot() {
  45                 return this.is_root;
  46         }
  47
  48         @Override
  49         public void close() throws SecurityException {}
  50
  51         @Override
  52         public void flush() {}
  53
  54         @Override
  55         public void publish(LogRecord record) {
  56                 /*
  57                  * Specific tracepoing designed for JUL events. The source class of the
  58                  * caller is used for the event name, the raw message is taken, the
  59                  * loglevel of the record and the thread ID.
  60                  */
  61                 if (this.is_root) {
  62                         tracepointS(record.getMessage(),
  63                                     record.getLoggerName(), record.getSourceClassName(),
  64                                     record.getSourceMethodName(), record.getMillis(),
  65                                     record.getLevel().intValue(), record.getThreadID());
  66                 } else {
  67                         tracepointU(record.getMessage(),
  68                                     record.getLoggerName(), record.getSourceClassName(),
  69                                     record.getSourceMethodName(), record.getMillis(),
  70                                     record.getLevel().intValue(), record.getThreadID());
  71                 }
  72         }
  73
  74         /* Use for a user session daemon. */
  75         private native void tracepointU(String msg, String logger_name, String class_name,
  76                         String method_name, long millis, int log_level, int thread_id);
  77
  78         /* Use for a root session daemon. */
  79         private native void tracepointS(String msg, String logger_name, String class_name,
  80                         String method_name, long millis, int log_level, int thread_id);
  81 }