org.dblock.log4jna.nt

Class Win32EventLogAppender

java.lang.Object

org.apache.logging.log4j.core.AbstractLifeCycle

org.apache.logging.log4j.core.filter.AbstractFilterable

org.apache.logging.log4j.core.appender.AbstractAppender

org.dblock.log4jna.nt.Win32EventLogAppender

All Implemented Interfaces:

Appender, Filterable, LocationAware, LifeCycle, LifeCycle2

@Plugin(name="Win32EventLog",
        category="Core",
        elementType="appender",
        printObject=true)
public class Win32EventLogAppender
extends AbstractAppender

Append to the NT event log system.

WARNING This appender can only be installed and used on a Windows system.

Do not forget to place jna.jar and platform.jar in the CLASSPATH.

Author:

Chris Taylor, Jim Cakalic, Daniel Doubrovkine, Tony Niemira, Claudio Trajtenberg, yokra

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.logging.log4j.core.appender.AbstractAppender

AbstractAppender.Builder<B extends AbstractAppender.Builder<B>>

Nested classes/interfaces inherited from interface org.apache.logging.log4j.core.LifeCycle

LifeCycle.State

Field Summary

Fields

Modifier and Type	Field and Description
private String	_application
private String	_categoryMessageFile
private String	_eventMessageFile
private WinNT.HANDLE	_handle
private String	_server
private String	_source
private static int	CATEGORY_COUNT
private static String	CATEGORY_MESSAGE_FILE
private static String	DEFAULT_APPLICATION
private static String	DEFAULT_SOURCE
private static String	EVENT_LOG_PATH
private static String	EVENT_MESSAGE_FILE
private static int	TYPES_SUPPORTED

Fields inherited from class org.apache.logging.log4j.core.AbstractLifeCycle

DEFAULT_STOP_TIMEOUT, DEFAULT_STOP_TIMEUNIT, LOGGER

Fields inherited from interface org.apache.logging.log4j.core.Appender

ELEMENT_TYPE, EMPTY_ARRAY

Constructor Summary

Constructors

Constructor and Description
Win32EventLogAppender(String name, String server, String source, String application, String eventMessageFile, String categoryMessageFile, Layout<? extends Serializable> layout, Filter filter)

Method Summary

Modifier and Type	Method and Description
void	activateOptions()
void	append(LogEvent event)
void	close()
private void	createAndSetAllKeys(String eventMessageFile, String categoryMessageFile, String eventSourceKeyPath)
static Win32EventLogAppender	createAppender(String name, String server, String source, String application, String eventMessageFile, String categoryMessageFile, Layout<? extends Serializable> layout, Filter filter)
void	finalize()
String	getApplication()
String	getCategoryMessageFile()
private static int	getEventLogCategory(Level level) Convert log4j Priority to an EventLog category.
private static int	getEventLogType(Level level) Convert log4j Priority to an EventLog type.
String	getEventMessageFile()
String	getSource()
private void	registerEventSource()
private WinNT.HANDLE	registerEventSource(String server, String source, String application, String eventMessageFile, String categoryMessageFile)
boolean	requiresLayout() The Win32EventLogAppender requires a layout.
void	setApplication(String application) The Application option which names the subsection of the 'Applications and Services Log'.
void	setCategoryMessageFile(String categoryMessageFile) The CategoryMessageFile option which sets file location of the Catagory Messages
void	setEventMessageFile(String eventMessageFile) The EventMessageFile option which sets file location of the Event Messages
void	setSource(String source) The Source option which names the source of the event.
private void	setVariableKeys(String eventMessageFile, String categoryMessageFile, String eventSourceKeyPath) Set the file location only if it does not exist or has changed.

Methods inherited from class org.apache.logging.log4j.core.appender.AbstractAppender

error, error, error, getHandler, getLayout, getName, ignoreExceptions, parseInt, requiresLocation, setHandler, toSerializable, toString

Methods inherited from class org.apache.logging.log4j.core.filter.AbstractFilterable

addFilter, getFilter, getPropertyArray, hasFilter, isFiltered, removeFilter, start, stop, stop

Methods inherited from class org.apache.logging.log4j.core.AbstractLifeCycle

equalsImpl, getState, getStatusLogger, hashCodeImpl, initialize, isInitialized, isStarted, isStarting, isStopped, isStopping, setStarted, setStarting, setState, setStopped, setStopping, stop, stop

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.logging.log4j.core.LifeCycle

getState, initialize, isStarted, isStopped, start, stop

Field Detail

EVENT_LOG_PATH

private static final String EVENT_LOG_PATH

See Also:

Constant Field Values

CATEGORY_MESSAGE_FILE

private static final String CATEGORY_MESSAGE_FILE

See Also:

Constant Field Values

EVENT_MESSAGE_FILE

private static final String EVENT_MESSAGE_FILE

See Also:

Constant Field Values

CATEGORY_COUNT

private static final int CATEGORY_COUNT

See Also:

Constant Field Values

TYPES_SUPPORTED

private static final int TYPES_SUPPORTED

See Also:

Constant Field Values

DEFAULT_SOURCE

private static final String DEFAULT_SOURCE

See Also:

Constant Field Values

DEFAULT_APPLICATION

private static final String DEFAULT_APPLICATION

See Also:

Constant Field Values

_source

private String _source

_server

private String _server

_application

private String _application

_eventMessageFile

private String _eventMessageFile

_categoryMessageFile

private String _categoryMessageFile

_handle

private WinNT.HANDLE _handle

Constructor Detail

Win32EventLogAppender

public Win32EventLogAppender(String name,
                             String server,
                             String source,
                             String application,
                             String eventMessageFile,
                             String categoryMessageFile,
                             Layout<? extends Serializable> layout,
                             Filter filter)

Parameters:

name - The appender name Win32EventLog

server - The server for remote logging

source - The Event View Source

application - The Event View application (location)

eventMessageFile - The message file location in the file system

categoryMessageFile - The message file location in the file system

layout - A Log4j Layout

filter - A Log4j Filter

Method Detail

createAppender

@PluginFactory
public static Win32EventLogAppender createAppender(@PluginAttribute(value="name")
                                                                   String name,
                                                                   @PluginAttribute(value="server")
                                                                   String server,
                                                                   @PluginAttribute(value="source")
                                                                   String source,
                                                                   @PluginAttribute(value="application")
                                                                   String application,
                                                                   @PluginAttribute(value="eventMessageFile")
                                                                   String eventMessageFile,
                                                                   @PluginAttribute(value="categoryMessageFile")
                                                                   String categoryMessageFile,
                                                                   @PluginElement(value="Layout")
                                                                   Layout<? extends Serializable> layout,
                                                                   @PluginElement(value="Filters")
                                                                   Filter filter)

Parameters:

name - The appender name Win32EventLog

server - The server for remote logging

source - The Event View Source

application - The Event View application (location)

eventMessageFile - The message file location in the file system

categoryMessageFile - The message file location in the file system

layout - A Log4j Layout

filter - A Log4j Filter

Returns:

setSource

public void setSource(String source)

The Source option which names the source of the event. The current value of this constant is Source.

getSource

public String getSource()

Returns:

setApplication

public void setApplication(String application)

The Application option which names the subsection of the 'Applications and Services Log'. The default value of this constant is Application.

Parameters:

application - The Event View application (location)

getApplication

public String getApplication()

Returns:

close

public void close()

setEventMessageFile

public void setEventMessageFile(String eventMessageFile)

The EventMessageFile option which sets file location of the Event Messages

Parameters:

eventMessageFile - The message file location in the file system

getEventMessageFile

public String getEventMessageFile()

Returns:

setCategoryMessageFile

public void setCategoryMessageFile(String categoryMessageFile)

The CategoryMessageFile option which sets file location of the Catagory Messages

Parameters:

categoryMessageFile - The message file location in the file system

getCategoryMessageFile

public String getCategoryMessageFile()

Returns:

registerEventSource

private void registerEventSource()

activateOptions

public void activateOptions()

append

public void append(LogEvent event)

finalize

public void finalize()

Overrides:

finalize in class Object

requiresLayout

public boolean requiresLayout()

The Win32EventLogAppender requires a layout. Hence, this method always returns true.

registerEventSource

private WinNT.HANDLE registerEventSource(String server,
                                         String source,
                                         String application,
                                         String eventMessageFile,
                                         String categoryMessageFile)

Parameters:

server - The server for remote logging

source - The Event View Source

application - The Event View application (location)

eventMessageFile - The message file location in the file system

categoryMessageFile - The message file location in the file system

Returns:

createAndSetAllKeys

private void createAndSetAllKeys(String eventMessageFile,
                                 String categoryMessageFile,
                                 String eventSourceKeyPath)

Parameters:

eventMessageFile - The message file location in the file system

categoryMessageFile - The message file location in the file system

eventSourceKeyPath - The registry path

setVariableKeys

private void setVariableKeys(String eventMessageFile,
                             String categoryMessageFile,
                             String eventSourceKeyPath)

Set the file location only if it does not exist or has changed.

Parameters:

eventMessageFile - The message file location in the file system

categoryMessageFile - The message file location in the file system

eventSourceKeyPath - The registry path

getEventLogType

private static int getEventLogType(Level level)

Convert log4j Priority to an EventLog type. The log4j package supports 8 defined priorities, but the NT EventLog only knows 3 event types of interest to us: ERROR, WARNING, and INFO.

Parameters:

level - Log4j priority.

Returns:

EventLog type.

getEventLogCategory

private static int getEventLogCategory(Level level)

Convert log4j Priority to an EventLog category. Each category is backed by a message resource so that proper category names will be displayed in the NT Event Viewer.

Parameters:

level - Log4J priority.

Returns:

EventLog category.