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Subject: Re: Log4J System alerts
Date: Thu, 30 Nov 2006 10:40:48 +0100
Message-ID: <3FE38194C8A3334A959B64B7D9A1E27B6E31A5@plejaden.seychelles.ergo>
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Thread-Topic: [SPAM (Bayesain Analysis)] - Re: Log4J System alerts - Bayesian
 Filter detected spam
thread-index: AccUB0u8pywErkD2QPuSqFbo3MbDKQAWrAJQ
From: "Bender Heri" <HBender@Ergonomics.ch>
To: "Log4J Users List" <log4j-user@logging.apache.org>
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Here a example how to configure filters. Note: Filters are only =
available if you use xml configuration.

    <appender name=3D"CONSOLE.OUT" =
class=3D"org.apache.log4j.ConsoleAppender">
        <param name=3D"target" value=3D"System.out"/>
        <layout class=3D"org.apache.log4j.PatternLayout">
            <param name=3D"ConversionPattern" value=3D"%d{HH:mm:ss.SSS} =
(%6r) %-5p [%-7t] %F:%L %x - %m%n"/>
        </layout>
        <filter class=3D"org.apache.log4j.varia.LevelRangeFilter">
            <param name=3D"LevelMin" value=3D"debug"/>
            <param name=3D"LevelMax" value=3D"info"/>
            <param name=3D"AcceptOnMatch" value=3D"false"/>
        </filter>
        <filter =
class=3D"ch.ergonomics.pms.common.supervision.TraceDenyFilter"/>
        <filter =
class=3D"ch.ergonomics.pms.common.supervision.XMLDenyFilter"/>
    </appender>

This appender has three filters attached. The first is a log4j built in =
filter (LevelRangeFilter), the thow others are self written filters, =
derived from org.apache.log4j.spi.Filter which filter LogEvents based on =
some values in MDC.
If a LogEvent reaches an appender, it is presented to the attached =
filters in the order they are configured. The Filter results in:
- ACCEPT  the LogEvent is accepted, no more further Filters are asked
- DENY    the Log Event is rejected, no more further Filters are asked
- NEUTRAL next filter in chain is asked

within a self written Filter you can implement any logic you want.

Heri

> -----Original Message-----
> From: garima015 [mailto:garima_indiya@rediffmail.com]
> Sent: Wednesday, November 29, 2006 11:39 PM
> To: log4j-user@logging.apache.org
>=20
>=20
>=20
> Can you please give me some more idea on how to create that=20
> filter..and how
> this will be called
>=20

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