org.apache.log4j.rolling
Interface TriggeringPolicy

All Superinterfaces:

org.apache.log4j.spi.OptionHandler

All Known Implementing Classes:

CompositeTriggeringPolicy, FilterBasedTriggeringPolicy, SizeBasedTriggeringPolicy, TimeBasedRollingPolicy

public interface TriggeringPolicy
extends org.apache.log4j.spi.OptionHandler

A TriggeringPolicy controls the conditions under which rollover occurs. Such conditions include time of day, file size, an external event, the log request or a combination thereof.

Author:

Ceki Gülcü, Curt Arnold

Method Summary

boolean

isTriggeringEvent(org.apache.log4j.Appender appender, org.apache.log4j.spi.LoggingEvent event, java.lang.String filename, long fileLength) Determines if a rollover may be appropriate at this time.

Methods inherited from interface org.apache.log4j.spi.OptionHandler

activateOptions

Method Detail

isTriggeringEvent

boolean isTriggeringEvent(org.apache.log4j.Appender appender,
                          org.apache.log4j.spi.LoggingEvent event,
                          java.lang.String filename,
                          long fileLength)

Determines if a rollover may be appropriate at this time. If true is returned, RolloverPolicy.rollover will be called but it can determine that a rollover is not warranted.

Parameters:

appender - A reference to the appender.

event - A reference to the currently event.

filename - The filename for the currently active log file.

fileLength - Length of the file in bytes.

Returns:

true if a rollover should occur.