/**
* Logback: the reliable, generic, fast and flexible logging framework.
*
* Copyright (C) 1999-2006, QOS.ch
*
* This library is free software, you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation.
*/
package ch.qos.logback.classic.net;
import java.io.IOException;
import ch.qos.logback.classic.PatternLayout;
import ch.qos.logback.classic.pattern.SyslogStartConverter;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.classic.spi.IThrowableProxy;
import ch.qos.logback.classic.spi.StackTraceElementProxy;
import ch.qos.logback.classic.util.LevelToSyslogSeverity;
import ch.qos.logback.core.CoreConstants;
import ch.qos.logback.core.Layout;
import ch.qos.logback.core.net.SyslogAppenderBase;
import ch.qos.logback.core.net.SyslogWriter;
/**
* This appender can be used to send messages to a remote syslog daemon. <p> For
* more information about this appender, please refer to the online manual at
* http://logback.qos.ch/manual/appenders.html#SyslogAppender
*
* @author Ceki Gülcü
*/
public class SyslogAppender extends SyslogAppenderBase<ILoggingEvent> {
static final public String DEFAULT_SUFFIX_PATTERN = "[%thread] %logger %msg";
PatternLayout prefixLayout = new PatternLayout();
public Layout<ILoggingEvent> buildLayout(String facilityStr) {
String prefixPattern = "%syslogStart{" + facilityStr + "}%nopex";
prefixLayout.getInstanceConverterMap().put("syslogStart",
SyslogStartConverter.class.getName());
prefixLayout.setPattern(prefixPattern);
prefixLayout.setContext(getContext());
prefixLayout.start();
PatternLayout fullLayout = new PatternLayout();
fullLayout.getInstanceConverterMap().put("syslogStart",
SyslogStartConverter.class.getName());
if (suffixPattern == null) {
suffixPattern = DEFAULT_SUFFIX_PATTERN;
}
fullLayout.setPattern(prefixPattern + suffixPattern);
fullLayout.setContext(getContext());
fullLayout.start();
return fullLayout;
}
/*
* Convert a level to equivalent syslog severity. Only levels for printing
* methods i.e DEBUG, WARN, INFO and ERROR are converted.
*
* @see ch.qos.logback.core.net.SyslogAppenderBase#getSeverityForEvent(java.lang.Object)
*/
@Override
public int getSeverityForEvent(Object eventObject) {
ILoggingEvent event = (ILoggingEvent) eventObject;
return LevelToSyslogSeverity.convert(event);
}
@Override
protected void postProcess(Object eventObject, SyslogWriter sw) {
ILoggingEvent event = (ILoggingEvent) eventObject;
String prefix = prefixLayout.doLayout(event);
IThrowableProxy tp = event.getThrowableProxy();
while (tp != null) {
StackTraceElementProxy[] stepArray = tp.getStackTraceElementProxyArray();
try {
for (StackTraceElementProxy step : stepArray) {
sw.write(prefix);
sw.write(CoreConstants.TAB);
sw.write(step.toString());
sw.flush();
}
} catch (IOException e) {
break;
}
tp = tp.getCause();
}
}
}