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
  27         private final Boolean isRoot;
  28
  29         public LTTngLogHandler(Boolean isRoot) {
  30                 super();
  31                 this.isRoot = isRoot;
  32                 /* Initialize LTTng UST tracer. */
  33                 try {
  34                         System.loadLibrary("lttng-ust-jul-jni"); //$NON-NLS-1$
  35                 } catch (SecurityException e) {
  36                         e.printStackTrace();
  37                 } catch (UnsatisfiedLinkError e) {
  38                         e.printStackTrace();
  39                 } catch (NullPointerException e) {
  40                         /* Should never happen */
  41                         e.printStackTrace();
  42                 }
  43         }
  44
  45         public Boolean isRoot() {
  46                 return this.isRoot;
  47         }
  48
  49         @Override
  50         public void close() throws SecurityException {}
  51
  52         @Override
  53         public void flush() {}
  54
  55         @Override
  56         public void publish(LogRecord record) {
  57                 /*
  58                  * Specific tracepoint designed for JUL events. The source class of the
  59                  * caller is used for the event name, the raw message is taken, the
  60                  * loglevel of the record and the thread ID.
  61                  */
  62                 if (this.isRoot) {
  63                         tracepointS(record.getMessage(),
  64                                     record.getLoggerName(), record.getSourceClassName(),
  65                                     record.getSourceMethodName(), record.getMillis(),
  66                                     record.getLevel().intValue(), record.getThreadID());
  67                 } else {
  68                         tracepointU(record.getMessage(),
  69                                     record.getLoggerName(), record.getSourceClassName(),
  70                                     record.getSourceMethodName(), record.getMillis(),
  71                                     record.getLevel().intValue(), record.getThreadID());
  72                 }
  73         }
  74
  75         /* Use for a user session daemon. */
  76         private native void tracepointU(String msg,
  77                         String logger_name,
  78                         String class_name,
  79                         String method_name,
  80                         long millis,
  81                         int log_level,
  82                         int thread_id);
  83
  84         /* Use for a root session daemon. */
  85         private native void tracepointS(String msg,
  86                         String logger_name,
  87                         String class_name,
  88                         String method_name,
  89                         long millis,
  90                         int log_level,
  91                         int thread_id);
  92 }