The version of Apache log4j used by SoundHelix.
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NTEventLogAppender.java
/*
* Copyright (C) The Apache Software Foundation. All rights reserved.
*
* This software is published under the terms of the Apache Software
* License version 1.1, a copy of which has been included with this
* distribution in the LICENSE.APL file. */
package org.apache.log4j.nt;
import org.apache.log4j.*;
import org.apache.log4j.spi.LoggingEvent;
import org.apache.log4j.Priority;
import java.io.*;
/**
Append to the NT event log system.
<p><b>WARNING</b> This appender can only be installed and used on a
Windows system.
<p>Do not forget to place the file NTEventLogAppender.dll in a
directory that is on the PATH of the Windows system. Otherwise, you
will get a java.lang.UnsatisfiedLinkError.
@author <a href="mailto:cstaylor@pacbell.net">Chris Taylor</a>
@author <a href="mailto:jim_cakalic@na.biomerieux.com">Jim Cakalic</a> */
public class NTEventLogAppender extends AppenderSkeleton {
private int _handle = 0;
private static final int FATAL = Priority.FATAL.toInt();
private static final int ERROR = Priority.ERROR.toInt();
private static final int WARN = Priority.WARN.toInt();
private static final int INFO = Priority.INFO.toInt();
private static final int DEBUG = Priority.DEBUG.toInt();
public NTEventLogAppender() {
this(null, null, null);
}
public NTEventLogAppender(String source) {
this(null, source, null);
}
public NTEventLogAppender(String server, String source) {
this(server, source, null);
}
public NTEventLogAppender(Layout layout) {
this(null, null, layout);
}
public NTEventLogAppender(String source, Layout layout) {
this(null, source, layout);
}
public NTEventLogAppender(String server, String source, Layout layout) {
if (source == null) {
source = "Log4j";
}
if (layout == null) {
this.layout = new TTCCLayout();
} else {
this.layout = layout;
}
try {
_handle = registerEventSource(server, source);
} catch (Exception e) {
e.printStackTrace();
_handle = 0;
}
}
public
void close() {
// unregister ...
}
public void append(LoggingEvent event) {
// First, format the log string so we can send it to NT.
StringWriter sw_writer = new StringWriter();
PrintWriter pw_writer = new PrintWriter(sw_writer);
pw_writer.print(layout.format(event));
// And append a throwable if supplied
if (event.throwable != null)
event.throwable.printStackTrace(pw_writer);
pw_writer.close();
// Normalize the log message priority into the supported categories
int nt_category = event.priority.toInt();
if (nt_category < FATAL || nt_category > DEBUG) {
nt_category = INFO;
}
reportEvent(_handle, sw_writer.toString(), nt_category);
}
public
void finalize() {
deregisterEventSource(_handle);
_handle = 0;
}
/**
The <code>NTEventLogAppender</code> requires a layout. Hence,
this method always returns <code>true</code>. */
public
boolean requiresLayout() {
return true;
}
native private int registerEventSource(String server, String source);
native private void reportEvent(int handle, String message, int priority);
native private void deregisterEventSource(int handle);
static {
System.loadLibrary("NTEventLogAppender");
}
}