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
  27         private Boolean isRoot;
  28
  29         public LTTngLogAppender(Boolean isRoot) {
  30                 super();
  31                 this.isRoot = isRoot;
  32                 try {
  33                         System.loadLibrary("lttng-ust-log4j-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.isRoot;
  46         }
  47
  48         @Override
  49         protected void append(LoggingEvent event) {
  50                 int line;
  51
  52                 /*
  53                  * The line number returned from LocationInformation is a
  54                  * string. At least try to convert to a proper int.
  55                  */
  56                 try {
  57                         String lineString = event.getLocationInformation().getLineNumber();
  58                         line = Integer.parseInt(lineString);
  59                 } catch (NumberFormatException n) {
  60                         line = -1;
  61                 }
  62
  63                 if (this.isRoot) {
  64                         tracepointS(event.getRenderedMessage(),
  65                                         event.getLoggerName(),
  66                                         event.getLocationInformation().getClassName(),
  67                                         event.getLocationInformation().getMethodName(),
  68                                         event.getLocationInformation().getFileName(),
  69                                         line,
  70                                         event.getTimeStamp(),
  71                                         event.getLevel().toInt(),
  72                                         event.getThreadName());
  73                 } else {
  74                         tracepointU(event.getRenderedMessage(),
  75                                         event.getLoggerName(),
  76                                         event.getLocationInformation().getClassName(),
  77                                         event.getLocationInformation().getMethodName(),
  78                                         event.getLocationInformation().getFileName(),
  79                                         line,
  80                                         event.getTimeStamp(),
  81                                         event.getLevel().toInt(),
  82                                         event.getThreadName());
  83                 }
  84         }
  85
  86         @Override
  87         public void close() {}
  88
  89         @Override
  90         public boolean requiresLayout() {
  91                 return false;
  92         }
  93
  94         /* Use for a user session daemon. */
  95         private native void tracepointU(String msg,
  96                                         String logger_name,
  97                                         String class_name,
  98                                         String method_name,
  99                                         String file_name,
 100                                         int line_number,
 101                                         long timestamp,
 102                                         int loglevel,
 103                                         String thread_name);
 104
 105         /* Use for a root session daemon. */
 106         private native void tracepointS(String msg,
 107                                         String logger_name,
 108                                         String class_name,
 109                                         String method_name,
 110                                         String file_name,
 111                                         int line_number,
 112                                         long timestamp,
 113                                         int loglevel,
 114                                         String thread_name);
 115 }