java.lang.Object
- org.apache.log4j.AppenderSkeleton
- - org.apache.log4j.net.SyslogAppender

All Implemented Interfaces:

Appender, OptionHandler
```
public class SyslogAppender
extends AppenderSkeleton
```
Use SyslogAppender to send log messages to a remote syslog daemon.

Author:

Ceki Gülcü, Anders Kristensen

Field Summary

Fields
Modifier and Type	Field	Description
`protected static int`	`FACILITY_OI`
`static int`	`LOG_AUTH`	security/authorization messages
`static int`	`LOG_AUTHPRIV`	security/authorization messages (private)
`static int`	`LOG_CRON`	clock daemon
`static int`	`LOG_DAEMON`	System daemons
`static int`	`LOG_FTP`	ftp daemon
`static int`	`LOG_KERN`	Kernel messages
`static int`	`LOG_LOCAL0`	reserved for local use
`static int`	`LOG_LOCAL1`	reserved for local use
`static int`	`LOG_LOCAL2`	reserved for local use
`static int`	`LOG_LOCAL3`	reserved for local use
`static int`	`LOG_LOCAL4`	reserved for local use
`static int`	`LOG_LOCAL5`	reserved for local use
`static int`	`LOG_LOCAL6`	reserved for local use
`static int`	`LOG_LOCAL7`	reserved for local use
`static int`	`LOG_LPR`	line printer subsystem
`static int`	`LOG_MAIL`	Mail system
`static int`	`LOG_NEWS`	network news subsystem
`static int`	`LOG_SYSLOG`	messages generated internally by syslogd
`static int`	`LOG_USER`	Random user-level messages
`static int`	`LOG_UUCP`	UUCP subsystem
`protected static int`	`SYSLOG_HOST_OI`

Fields inherited from class org.apache.log4j.AppenderSkeleton
closed, errorHandler, headFilter, layout, name, tailFilter, threshold

Constructor Summary

Constructors
Constructor	Description
`SyslogAppender()`
`SyslogAppender(Layout layout, int syslogFacility)`
`SyslogAppender(Layout layout, java.lang.String syslogHost, int syslogFacility)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`activateOptions()`	This method returns immediately as options are activated when they are set.
`void`	`append(LoggingEvent event)`	Subclasses of `AppenderSkeleton` should implement this method to perform actual logging.
`void`	`close()`	Release any resources held by this SyslogAppender.
`java.lang.String`	`getFacility()`	Returns the value of the Facility option.
`static int`	`getFacility(java.lang.String facilityName)`	Returns the integer value corresponding to the named syslog facility, or -1 if it couldn't be recognized.
`boolean`	`getFacilityPrinting()`	Returns the value of the FacilityPrinting option.
`static java.lang.String`	`getFacilityString(int syslogFacility)`	Returns the specified syslog facility as a lower-case String, e.g.
`boolean`	`getHeader()`	If true, the appender will generate the HEADER part (that is, timestamp and host name) of the syslog packet.
`java.lang.String`	`getSyslogHost()`	Returns the value of the SyslogHost option.
`boolean`	`requiresLayout()`	The SyslogAppender requires a layout.
`void`	`setFacility(java.lang.String facilityName)`	Set the syslog facility.
`void`	`setFacilityPrinting(boolean on)`	If the FacilityPrinting option is set to true, the printed message will include the facility name of the application.
`void`	`setHeader(boolean val)`	Returns whether the appender produces the HEADER part (that is, timestamp and host name) of the syslog packet.
`void`	`setSyslogHost(java.lang.String syslogHost)`	The SyslogHost option is the name of the the syslog host where log output should go.

Methods inherited from class org.apache.log4j.AppenderSkeleton
addFilter, clearFilters, doAppend, finalize, getErrorHandler, getFilter, getFirstFilter, getLayout, getName, getThreshold, isAsSevereAsThreshold, setErrorHandler, setLayout, setName, setThreshold

Methods inherited from class java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - LOG_KERN
```
public static final int LOG_KERN
```
    Kernel messages
    
    See Also:
    
    Constant Field Values
  - LOG_USER
```
public static final int LOG_USER
```
    Random user-level messages
    
    See Also:
    
    Constant Field Values
  - LOG_MAIL
```
public static final int LOG_MAIL
```
    Mail system
    
    See Also:
    
    Constant Field Values
  - LOG_DAEMON
```
public static final int LOG_DAEMON
```
    System daemons
    
    See Also:
    
    Constant Field Values
  - LOG_AUTH
```
public static final int LOG_AUTH
```
    security/authorization messages
    
    See Also:
    
    Constant Field Values
  - LOG_SYSLOG
```
public static final int LOG_SYSLOG
```
    messages generated internally by syslogd
    
    See Also:
    
    Constant Field Values
  - LOG_LPR
```
public static final int LOG_LPR
```
    line printer subsystem
    
    See Also:
    
    Constant Field Values
  - LOG_NEWS
```
public static final int LOG_NEWS
```
    network news subsystem
    
    See Also:
    
    Constant Field Values
  - LOG_UUCP
```
public static final int LOG_UUCP
```
    UUCP subsystem
    
    See Also:
    
    Constant Field Values
  - LOG_CRON
```
public static final int LOG_CRON
```
    clock daemon
    
    See Also:
    
    Constant Field Values
  - LOG_AUTHPRIV
```
public static final int LOG_AUTHPRIV
```
    security/authorization messages (private)
    
    See Also:
    
    Constant Field Values
  - LOG_FTP
```
public static final int LOG_FTP
```
    ftp daemon
    
    See Also:
    
    Constant Field Values
  - LOG_LOCAL0
```
public static final int LOG_LOCAL0
```
    reserved for local use
    
    See Also:
    
    Constant Field Values
  - LOG_LOCAL1
```
public static final int LOG_LOCAL1
```
    reserved for local use
    
    See Also:
    
    Constant Field Values
  - LOG_LOCAL2
```
public static final int LOG_LOCAL2
```
    reserved for local use
    
    See Also:
    
    Constant Field Values
  - LOG_LOCAL3
```
public static final int LOG_LOCAL3
```
    reserved for local use
    
    See Also:
    
    Constant Field Values
  - LOG_LOCAL4
```
public static final int LOG_LOCAL4
```
    reserved for local use
    
    See Also:
    
    Constant Field Values
  - LOG_LOCAL5
```
public static final int LOG_LOCAL5
```
    reserved for local use
    
    See Also:
    
    Constant Field Values
  - LOG_LOCAL6
```
public static final int LOG_LOCAL6
```
    reserved for local use
    
    See Also:
    
    Constant Field Values
  - LOG_LOCAL7
```
public static final int LOG_LOCAL7
```
    reserved for local use
    
    See Also:
    
    Constant Field Values
  - SYSLOG_HOST_OI
```
protected static final int SYSLOG_HOST_OI
```
    See Also:
    
    Constant Field Values
  - FACILITY_OI
```
protected static final int FACILITY_OI
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - SyslogAppender
```
public SyslogAppender()
```
  - SyslogAppender
```
public SyslogAppender(Layout layout,
                      int syslogFacility)
```
  - SyslogAppender
```
public SyslogAppender(Layout layout,
                      java.lang.String syslogHost,
                      int syslogFacility)
```
- Method Detail
  - close
```
public void close()
```
    Release any resources held by this SyslogAppender.
    
    Since:
    
    0.8.4
  - getFacilityString
```
public static java.lang.String getFacilityString(int syslogFacility)
```
    Returns the specified syslog facility as a lower-case String, e.g. "kern", "user", etc.
  - getFacility
```
public static int getFacility(java.lang.String facilityName)
```
    Returns the integer value corresponding to the named syslog facility, or -1 if it couldn't be recognized.
    
    Parameters:
    
    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
  - append
```
public void append(LoggingEvent event)
```
    Description copied from class: AppenderSkeleton
    
    Subclasses of AppenderSkeleton should implement this method to perform actual logging. See also AppenderSkeleton.doAppend method.
    
    Specified by:
    
    append in class AppenderSkeleton
  - activateOptions
```
public void activateOptions()
```
    This method returns immediately as options are activated when they are set.
    
    Specified by:
    
    activateOptions in interface OptionHandler
    
    Overrides:
    
    activateOptions in class AppenderSkeleton
  - requiresLayout
```
public boolean requiresLayout()
```
    The SyslogAppender requires a layout. Hence, this method returns true.
    
    Since:
    
    0.8.4
  - setSyslogHost
```
public void setSyslogHost(java.lang.String syslogHost)
```
    The SyslogHost 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. WARNING If the SyslogHost is not set, then this appender will fail.
  - getSyslogHost
```
public java.lang.String getSyslogHost()
```
    Returns the value of the SyslogHost option.
  - setFacility
```
public void setFacility(java.lang.String facilityName)
```
    Set the syslog facility. This is the Facility option.
    The facilityName 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
  - getFacility
```
public java.lang.String getFacility()
```
    Returns the value of the Facility option.
  - setFacilityPrinting
```
public void setFacilityPrinting(boolean on)
```
    If the FacilityPrinting option is set to true, the printed message will include the facility name of the application. It is false by default.
  - getFacilityPrinting
```
public boolean getFacilityPrinting()
```
    Returns the value of the FacilityPrinting option.
  - getHeader
```
public final boolean getHeader()
```
    If true, the appender will generate the HEADER part (that is, timestamp and host name) of the syslog packet. Default value is false for compatibility with existing behavior, however should be true unless there is a specific justification.
    
    Since:
    
    1.2.15
  - setHeader
```
public final void setHeader(boolean val)
```
    Returns whether the appender produces the HEADER part (that is, timestamp and host name) of the syslog packet.
    
    Since:
    
    1.2.15

Class SyslogAppender

Field Summary

Fields inherited from class org.apache.log4j.AppenderSkeleton

Constructor Summary

Method Summary

Methods inherited from class org.apache.log4j.AppenderSkeleton

Methods inherited from class java.lang.Object

Field Detail

LOG_KERN

LOG_USER

LOG_MAIL

LOG_DAEMON

LOG_AUTH

LOG_SYSLOG

LOG_LPR

LOG_NEWS

LOG_UUCP

LOG_CRON

LOG_AUTHPRIV

LOG_FTP

LOG_LOCAL0

LOG_LOCAL1

LOG_LOCAL2

LOG_LOCAL3

LOG_LOCAL4

LOG_LOCAL5

LOG_LOCAL6

LOG_LOCAL7

SYSLOG_HOST_OI

FACILITY_OI

Constructor Detail

SyslogAppender

SyslogAppender

SyslogAppender

Method Detail

close

getFacilityString

getFacility

append

activateOptions

requiresLayout

setSyslogHost

getSyslogHost

setFacility

getFacility

setFacilityPrinting

getFacilityPrinting

getHeader

setHeader