OptionHandler

org.apache.log4j.spi.OptionHandler

Known Indirect Subclasses

AppenderSkeleton, AsyncAppender, ConsoleAppender, DailyRollingFileAppender, DateLayout, DenyAllFilter, EnhancedPatternLayout, ErrorHandler, ExternallyRolledFileAppender, FallbackErrorHandler, FileAppender, Filter, HTMLLayout, JDBCAppender, JMSAppender, and 19 others.

AppenderSkeleton	Abstract superclass of the other appenders in the package.
AsyncAppender	The AsyncAppender lets users log events asynchronously.
ConsoleAppender	ConsoleAppender appends log events to `System.out` or `System.err` using a layout specified by the user.
DailyRollingFileAppender	DailyRollingFileAppender extends `FileAppender` so that the underlying file is rolled over at a user chosen frequency.
DateLayout	This abstract layout takes care of all the date related options and formatting work.
DenyAllFilter	This filter drops all logging events.
EnhancedPatternLayout	This class is an enhanced version of org.apache.log4j.PatternLayout which was originally developed as part of the abandoned log4j 1.3 effort and has been available in the extras companion.
ErrorHandler	Appenders may delegate their error handling to `ErrorHandlers`.
ExternallyRolledFileAppender	This appender listens on a socket on the port specified by the Port property for a "RollOver" message.
FallbackErrorHandler	The `FallbackErrorHandler` implements the ErrorHandler interface such that a secondary appender may be specified.
FileAppender	FileAppender appends log events to a file.
Filter	Users should extend this class to implement customized logging event filtering.
HTMLLayout	This layout outputs events in a HTML table.
JDBCAppender	The JDBCAppender provides for sending log events to a database.
JMSAppender	A simple appender that publishes events to a JMS Topic.
LF5Appender	`LF5Appender` logs events to a swing based logging console.
Layout	Extend this abstract class to create your own log layout format.
LevelMatchFilter	This is a very simple filter based on level matching.
LevelRangeFilter	This is a very simple filter based on level matching, which can be used to reject messages with priorities outside a certain range.
NTEventLogAppender	Append to the NT event log system.
NullAppender	A NullAppender merely exists, it never outputs a message to any device.
OnlyOnceErrorHandler	The `OnlyOnceErrorHandler` implements log4j's default error handling policy which consists of emitting a message for the first error in an appender and ignoring all following errors.
PatternLayout	A flexible layout configurable with pattern string.
RollingFileAppender	RollingFileAppender extends FileAppender to backup the log files when they reach a certain size.
SMTPAppender	Send an e-mail when a specific logging event occurs, typically on errors or fatal errors.
SimpleLayout	SimpleLayout consists of the level of the log statement, followed by " - " and then the log message itself.
SocketAppender	Sends `LoggingEvent` objects to a remote a log server, usually a `SocketNode`.
SocketHubAppender	Sends `LoggingEvent` objects to a set of remote log servers, usually a `SocketNodes`.
StringMatchFilter	This is a very simple filter based on string matching.
SyslogAppender	Use SyslogAppender to send log messages to a remote syslog daemon.
TTCCLayout	TTCC layout format consists of time, thread, category and nested diagnostic context information, hence the name.
TelnetAppender	The TelnetAppender is a log4j appender that specializes in writing to a read-only socket.
WriterAppender	WriterAppender appends log events to a java.io.Writer or an java.io.OutputStream depending on the user's choice.
XMLLayout	The output of the XMLLayout consists of a series of log4j:event elements as defined in the log4j.dtd.

Class Overview

A string based interface to configure package components.

Summary

Public Methods
abstract void	activateOptions() Activate the options that were previously set with calls to option setters.

Public Methods

public abstract void activateOptions ()

Activate the options that were previously set with calls to option setters.

This allows to defer activiation of the options until all options have been set. This is required for components which have related options that remain ambigous until all are set.

For example, the FileAppender has the File and Append options both of which are ambigous until the other is also set.

Interfaces

Classes

OptionHandler

Class Overview

Summary

Public Methods

public abstract void activateOptions ()