/*
* Copyright 1999-2005 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.log4j.net;
import org.apache.log4j.AppenderSkeleton;
import org.apache.log4j.spi.LoggingEvent;
import org.apache.log4j.Layout;
import org.apache.log4j.helpers.SyslogWriter;
import org.apache.log4j.helpers.SyslogQuietWriter;
// Contributors: Yves Bossel <ybossel@opengets.cl>
// Christopher Taylor <cstaylor@pacbell.net>
/**
Use SyslogAppender to send log messages to a remote syslog daemon.
@author Ceki Gülcü
@author Anders Kristensen
*/
public class SyslogAppender extends AppenderSkeleton {
// The following constants are extracted from a syslog.h file
// copyrighted by the Regents of the University of California
// I hope nobody at Berkley gets offended.
/** Kernel messages */
final static public int LOG_KERN = 0;
/** Random user-level messages */
final static public int LOG_USER = 1<<3;
/** Mail system */
final static public int LOG_MAIL = 2<<3;
/** System daemons */
final static public int LOG_DAEMON = 3<<3;
/** security/authorization messages */
final static public int LOG_AUTH = 4<<3;
/** messages generated internally by syslogd */
final static public int LOG_SYSLOG = 5<<3;
/** line printer subsystem */
final static public int LOG_LPR = 6<<3;
/** network news subsystem */
final static public int LOG_NEWS = 7<<3;
/** UUCP subsystem */
final static public int LOG_UUCP = 8<<3;
/** clock daemon */
final static public int LOG_CRON = 9<<3;
/** security/authorization messages (private) */
final static public int LOG_AUTHPRIV = 10<<3;
/** ftp daemon */
final static public int LOG_FTP = 11<<3;
// other codes through 15 reserved for system use
/** reserved for local use */
final static public int LOG_LOCAL0 = 16<<3;
/** reserved for local use */
final static public int LOG_LOCAL1 = 17<<3;
/** reserved for local use */
final static public int LOG_LOCAL2 = 18<<3;
/** reserved for local use */
final static public int LOG_LOCAL3 = 19<<3;
/** reserved for local use */
final static public int LOG_LOCAL4 = 20<<3;
/** reserved for local use */
final static public int LOG_LOCAL5 = 21<<3;
/** reserved for local use */
final static public int LOG_LOCAL6 = 22<<3;
/** reserved for local use*/
final static public int LOG_LOCAL7 = 23<<3;
protected static final int SYSLOG_HOST_OI = 0;
protected static final int FACILITY_OI = 1;
static final String TAB = " ";
// Have LOG_USER as default
int syslogFacility = LOG_USER;
String facilityStr;
boolean facilityPrinting = false;
//SyslogTracerPrintWriter stp;
SyslogQuietWriter sqw;
String syslogHost;
public
SyslogAppender() {
this.initSyslogFacilityStr();
}
public
SyslogAppender(Layout layout, int syslogFacility) {
this.layout = layout;
this.syslogFacility = syslogFacility;
this.initSyslogFacilityStr();
}
public
SyslogAppender(Layout layout, String syslogHost, int syslogFacility) {
this(layout, syslogFacility);
setSyslogHost(syslogHost);
}
/**
Release any resources held by this SyslogAppender.
@since 0.8.4
*/
synchronized
public
void close() {
closed = true;
// A SyslogWriter is UDP based and needs no opening. Hence, it
// can't be closed. We just unset the variables here.
sqw = null;
}
private
void initSyslogFacilityStr() {
facilityStr = getFacilityString(this.syslogFacility);
if (facilityStr == null) {
System.err.println("\"" + syslogFacility +
"\" is an unknown syslog facility. Defaulting to \"USER\".");
this.syslogFacility = LOG_USER;
facilityStr = "user:";
} else {
facilityStr += ":";
}
}
/**
Returns the specified syslog facility as a lower-case String,
e.g. "kern", "user", etc.
*/
public
static
String getFacilityString(int syslogFacility) {
switch(syslogFacility) {
case LOG_KERN: return "kern";
case LOG_USER: return "user";
case LOG_MAIL: return "mail";
case LOG_DAEMON: return "daemon";
case LOG_AUTH: return "auth";
case LOG_SYSLOG: return "syslog";
case LOG_LPR: return "lpr";
case LOG_NEWS: return "news";
case LOG_UUCP: return "uucp";
case LOG_CRON: return "cron";
case LOG_AUTHPRIV: return "authpriv";
case LOG_FTP: return "ftp";
case LOG_LOCAL0: return "local0";
case LOG_LOCAL1: return "local1";
case LOG_LOCAL2: return "local2";
case LOG_LOCAL3: return "local3";
case LOG_LOCAL4: return "local4";
case LOG_LOCAL5: return "local5";
case LOG_LOCAL6: return "local6";
case LOG_LOCAL7: return "local7";
default: return null;
}
}
/**
Returns the integer value corresponding to the named syslog
facility, or -1 if it couldn't be recognized.
@param facilityName one of the strings KERN, USER, MAIL, DAEMON,
AUTH, SYSLOG, LPR, NEWS, UUCP, CRON, AUTHPRIV, FTP, LOCAL0,
LOCAL1, LOCAL2, LOCAL3, LOCAL4, LOCAL5, LOCAL6, LOCAL7.
The matching is case-insensitive.
@since 1.1
*/
public
static
int getFacility(String facilityName) {
if(facilityName != null) {
facilityName = facilityName.trim();
}
if("KERN".equalsIgnoreCase(facilityName)) {
return LOG_KERN;
} else if("USER".equalsIgnoreCase(facilityName)) {
return LOG_USER;
} else if("MAIL".equalsIgnoreCase(facilityName)) {
return LOG_MAIL;
} else if("DAEMON".equalsIgnoreCase(facilityName)) {
return LOG_DAEMON;
} else if("AUTH".equalsIgnoreCase(facilityName)) {
return LOG_AUTH;
} else if("SYSLOG".equalsIgnoreCase(facilityName)) {
return LOG_SYSLOG;
} else if("LPR".equalsIgnoreCase(facilityName)) {
return LOG_LPR;
} else if("NEWS".equalsIgnoreCase(facilityName)) {
return LOG_NEWS;
} else if("UUCP".equalsIgnoreCase(facilityName)) {
return LOG_UUCP;
} else if("CRON".equalsIgnoreCase(facilityName)) {
return LOG_CRON;
} else if("AUTHPRIV".equalsIgnoreCase(facilityName)) {
return LOG_AUTHPRIV;
} else if("FTP".equalsIgnoreCase(facilityName)) {
return LOG_FTP;
} else if("LOCAL0".equalsIgnoreCase(facilityName)) {
return LOG_LOCAL0;
} else if("LOCAL1".equalsIgnoreCase(facilityName)) {
return LOG_LOCAL1;
} else if("LOCAL2".equalsIgnoreCase(facilityName)) {
return LOG_LOCAL2;
} else if("LOCAL3".equalsIgnoreCase(facilityName)) {
return LOG_LOCAL3;
} else if("LOCAL4".equalsIgnoreCase(facilityName)) {
return LOG_LOCAL4;
} else if("LOCAL5".equalsIgnoreCase(facilityName)) {
return LOG_LOCAL5;
} else if("LOCAL6".equalsIgnoreCase(facilityName)) {
return LOG_LOCAL6;
} else if("LOCAL7".equalsIgnoreCase(facilityName)) {
return LOG_LOCAL7;
} else {
return -1;
}
}
public
void append(LoggingEvent event) {
if(!isAsSevereAsThreshold(event.getLevel()))
return;
// We must not attempt to append if sqw is null.
if(sqw == null) {
errorHandler.error("No syslog host is set for SyslogAppedender named \""+
this.name+"\".");
return;
}
String buffer = (facilityPrinting? facilityStr : "") +
layout.format(event);
sqw.setLevel(event.getLevel().getSyslogEquivalent());
sqw.write(buffer);
if (layout.ignoresThrowable()) {
String[] s = event.getThrowableStrRep();
if (s != null) {
int len = s.length;
if(len > 0) {
sqw.write(s[0]);
for(int i = 1; i < len; i++) {
sqw.write(TAB+s[i].substring(1));
}
}
}
}
}
/**
This method returns immediately as options are activated when they
are set.
*/
public
void activateOptions() {
}
/**
The SyslogAppender requires a layout. Hence, this method returns
<code>true</code>.
@since 0.8.4 */
public
boolean requiresLayout() {
return true;
}
/**
The <b>SyslogHost</b> option is the name of the the syslog host
where log output should go. A non-default port can be specified by
appending a colon and port number to a host name,
an IPv4 address or an IPv6 address enclosed in square brackets.
<b>WARNING</b> If the SyslogHost is not set, then this appender
will fail.
*/
public
void setSyslogHost(final String syslogHost) {
this.sqw = new SyslogQuietWriter(new SyslogWriter(syslogHost),
syslogFacility, errorHandler);
//this.stp = new SyslogTracerPrintWriter(sqw);
this.syslogHost = syslogHost;
}
/**
Returns the value of the <b>SyslogHost</b> option.
*/
public
String getSyslogHost() {
return syslogHost;
}
/**
Set the syslog facility. This is the <b>Facility</b> option.
<p>The <code>facilityName</code> parameter must be one of the
strings KERN, USER, MAIL, DAEMON, AUTH, SYSLOG, LPR, NEWS, UUCP,
CRON, AUTHPRIV, FTP, LOCAL0, LOCAL1, LOCAL2, LOCAL3, LOCAL4,
LOCAL5, LOCAL6, LOCAL7. Case is unimportant.
@since 0.8.1 */
public
void setFacility(String facilityName) {
if(facilityName == null)
return;
syslogFacility = getFacility(facilityName);
if (syslogFacility == -1) {
System.err.println("["+facilityName +
"] is an unknown syslog facility. Defaulting to [USER].");
syslogFacility = LOG_USER;
}
this.initSyslogFacilityStr();
// If there is already a sqw, make it use the new facility.
if(sqw != null) {
sqw.setSyslogFacility(this.syslogFacility);
}
}
/**
Returns the value of the <b>Facility</b> option.
*/
public
String getFacility() {
return getFacilityString(syslogFacility);
}
/**
If the <b>FacilityPrinting</b> option is set to true, the printed
message will include the facility name of the application. It is
<em>false</em> by default.
*/
public
void setFacilityPrinting(boolean on) {
facilityPrinting = on;
}
/**
Returns the value of the <b>FacilityPrinting</b> option.
*/
public
boolean getFacilityPrinting() {
return facilityPrinting;
}
}