org.apache.log4j.rolling

Implements various file rolling policies.

The RollingFileAppender class serves as the linchpin of this package. Its behaviour is controlled by two subcomponents of type RollingPolicy and TriggeringPolicy.

Interface Summary
Interface	Description
RollingPolicy	A `RollingPolicy` specifies the actions taken on a logging file rollover.
RolloverDescription	Description of actions needed to complete rollover.
TriggeringPolicy	A `TriggeringPolicy` controls the conditions under which rollover occurs.

Class Summary
Class	Description
CompositeTriggeringPolicy	CompositeTriggeringPolicy determines if rolling should be triggered by evaluating the current event against a set of triggering policies.
FilterBasedTriggeringPolicy	FilterBasedTriggeringPolicy determines if rolling should be triggered by evaluating the current message against a set of filters.
FixedWindowRollingPolicy	When rolling over, `FixedWindowRollingPolicy` renames files according to a fixed window algorithm as described below.
RollingFileAppender	`RollingFileAppender` extends `FileAppender` to backup the log files depending on `RollingPolicy` and `TriggeringPolicy`.
RollingFileAppender.CountingOutputStream	Wrapper for OutputStream that will report all write operations back to this class for file length calculations.
RollingFileAppender.DefaultErrorHandler
RollingPolicyBase	Implements methods common to most, it not all, rolling policies.
RolloverDescriptionImpl	Description of actions needed to complete rollover.
SizeBasedTriggeringPolicy	SizeBasedTriggeringPolicy looks at size of the file being currently written to.
TimeBasedRollingPolicy	`TimeBasedRollingPolicy` is both easy to configure and quite powerful.