liblttng-ust-java-agent/java/org/lttng/ust/agent/log4j/LTTngLogAppender.java

   1 /*
   2  * Copyright (C) 2014 - Christian Babeux <christian.babeux@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.log4j;
  19
  20 import java.lang.String;
  21
  22 import org.apache.log4j.AppenderSkeleton;
  23 import org.apache.log4j.spi.LoggingEvent;
  24
  25 class LTTngLogAppender extends AppenderSkeleton {
  26         private Boolean is_root;
  27
  28         public LTTngLogAppender(Boolean isRoot) {
  29                 super();
  30                 this.is_root = isRoot;
  31                 try {
  32                         System.loadLibrary("lttng-ust-log4j-jni"); //$NON-NLS-1$
  33                 } catch (SecurityException e) {
  34                         e.printStackTrace();
  35                 } catch (UnsatisfiedLinkError e) {
  36                         e.printStackTrace();
  37                 } catch (NullPointerException e) {
  38                         /* Should never happen */
  39                         e.printStackTrace();
  40                 }
  41         }
  42
  43         public Boolean isRoot() {
  44                 return this.is_root;
  45         }
  46
  47         @Override
  48         protected void append(LoggingEvent event) {
  49                 int line;
  50
  51                 /*
  52                  * The line number returned from LocationInformation is a
  53                  * string. At least try to convert to a proper int.
  54                  */
  55                 try {
  56                         String lineString = event.getLocationInformation().getLineNumber();
  57                         line = Integer.parseInt(lineString);
  58                 } catch (NumberFormatException n) {
  59                         line = -1;
  60                 }
  61
  62                 if (this.is_root) {
  63                         tracepointS(event.getRenderedMessage(),
  64                                     event.getLoggerName(),
  65                                     event.getLocationInformation().getClassName(),
  66                                     event.getLocationInformation().getMethodName(),
  67                                     event.getLocationInformation().getFileName(),
  68                                     line,
  69                                     event.getTimeStamp(),
  70                                     event.getLevel().toInt(),
  71                                     event.getThreadName());
  72                 } else {
  73                         tracepointU(event.getRenderedMessage(),
  74                                     event.getLoggerName(),
  75                                     event.getLocationInformation().getClassName(),
  76                                     event.getLocationInformation().getMethodName(),
  77                                     event.getLocationInformation().getFileName(),
  78                                     line,
  79                                     event.getTimeStamp(),
  80                                     event.getLevel().toInt(),
  81                                     event.getThreadName());
  82                 }
  83         }
  84
  85         @Override
  86         public void close() {}
  87
  88         @Override
  89         public boolean requiresLayout() {
  90                 return false;
  91         }
  92
  93         /* Use for a user session daemon. */
  94         private native void tracepointU(String msg,
  95                                         String logger_name,
  96                                         String class_name,
  97                                         String method_name,
  98                                         String file_name,
  99                                         int line_number,
 100                                         long timestamp,
 101                                         int loglevel,
 102                                         String thread_name);
 103
 104         /* Use for a root session daemon. */
 105         private native void tracepointS(String msg,
 106                                         String logger_name,
 107                                         String class_name,
 108                                         String method_name,
 109                                         String file_name,
 110                                         int line_number,
 111                                         long timestamp,
 112                                         int loglevel,
 113                                         String thread_name);
 114 }