Package org.apache.log4j

The main log4j package.

See: Description

Interface Summary

Interface	Description
Appender	Implement this interface for your own strategies for outputting log statements.

Class Summary

Class	Description
AppenderSkeleton	Abstract superclass of the other appenders in the package.
AsyncAppender	The AsyncAppender lets users log events asynchronously.
BasicConfigurator	Use this class to quickly configure the package.
Category	This class has been deprecated and replaced by the Logger subclass.
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.
DefaultThrowableRenderer	Default implementation of ThrowableRenderer using Throwable.printStackTrace.
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.
EnhancedThrowableRenderer	Enhanced implementation of ThrowableRenderer.
FileAppender	FileAppender appends log events to a file.
FilteredObjectInputStream	Extended ObjectInputStream that only allows certain classes to be deserialized.
Hierarchy	This class is specialized in retrieving loggers by name and also maintaining the logger hierarchy.
HTMLLayout	This layout outputs events in a HTML table.
Layout	Extend this abstract class to create your own log layout format.
Level	Defines the minimum set of levels recognized by the system, that is OFF, FATAL, ERROR, WARN, INFODEBUG and ALL.
Logger	This is the central class in the log4j package.
LogManager	Use the LogManager class to retreive Logger instances or to operate on the current LoggerRepository.
LogMF	This class provides parameterized logging services using the pattern syntax of java.text.MessageFormat.
LogSF	This class provides parameterized logging services using the SLF4J pattern syntax.
LogXF	This is a base class for LogMF and LogSF parameterized logging classes.
MDC	The MDC class is similar to the NDC class except that it is based on a map instead of a stack.
NDC	The NDC class implements nested diagnostic contexts as defined by Neil Harrison in the article "Patterns for Logging Diagnostic Messages" part of the book "Pattern Languages of Program Design 3" edited by Martin et al.
PatternLayout	A flexible layout configurable with pattern string.
Priority	Refrain from using this class directly, use the Level class instead.
PropertyConfigurator	Allows the configuration of log4j from an external file.
RollingFileAppender	RollingFileAppender extends FileAppender to backup the log files when they reach a certain size.
SimpleLayout	SimpleLayout consists of the level of the log statement, followed by " - " and then the log message itself.
TTCCLayout	TTCC layout format consists of time, thread, category and nested diagnostic context information, hence the name.
WriterAppender	WriterAppender appends log events to a Writer or an OutputStream depending on the user's choice.

Package org.apache.log4j Description

The main log4j package.