JavaMap(3)

NAME
Log::Log4perl::JavaMap - maps java log4j appenders to Log::Dispatch classes

SYNOPSIS
     ###############################
     log4j.appender.FileAppndr1        = org.apache.log4j.FileAppender
     log4j.appender.FileAppndr1.File   = /var/log/onetime.log
     log4j.appender.FileAppndr1.Append = false

     log4j.appender.FileAppndr1.layout = org.apache.log4j.PatternLayout
     log4j.appender.FileAppndr1.layout.ConversionPattern=%d %4r [%t] %-5p %c %x - %m%n
     ###############################

DESCRIPTION
If somebody wants to create an appender called "org.apache.log4j.ConsoleAppender", we want to translate it to Log::Dispatch::Screen, and then translate the log4j options into Log::Dispatch parameters..

  What's Implemented
(Note that you can always use the Log::Dispatch::* module. By 'implemented' I mean having a translation class that translates log4j options into the Log::Dispatch options so you can use log4j rather than log4perl syntax in your config file.)

Here's the list of appenders I see on the current (6/2002) log4j site.

These are implemented

    ConsoleAppender     - Log::Dispatch::Screen
    FileAppender        - Log::Dispatch::File
    RollingFileAppender - Log::Dispatch::FileRotate (by Mark Pfeiffer)
    JDBCAppender        - Log::Log4perl::Appender::DBI
    SyslogAppender      - Log::Dispatch::Syslog
    NTEventLogAppender  - Log::Dispatch::Win32EventLog

These should/will/might be implemented

    DailyRollingFileAppender -
    SMTPAppender     - Log::Dispatch::Email::MailSender

These might be implemented but they don't have corresponding classes in Log::Dispatch (yet):

    NullAppender
    TelnetAppender

These might be simulated

    LF5Appender - use Tk?
    ExternallyRolledFileAppender - catch a HUP instead?

These will probably not be implemented

    AsyncAppender
    JMSAppender
    SocketAppender - (ships a serialized LoggingEvent to the server side)
    SocketHubAppender

ROLL YOUR OWN
Let's say you've in a mixed Java/Perl enviroment and you've come up with some custom Java appender with behavior you want to use in both worlds, "myorg.customAppender". You write a Perl appender with the same behavior "Myorg::CustomAppender". You want to use one config file accross both applications, so the config file will have to say 'myorg.customAppender'. But the mapping from "myorg.customAppender" to "Myorg::CustomAppender" isn't in this JavaMap class, so what do you do?

In your Perl code, before you call Log::Log4perl::init(), do this:

    $Log::Log4perl::JavaMap::user_defined{'myorg.customAppender'} =
        'Myorg::CustomAppender';

and you can use 'myorg.customAppender' in your config file with impunity.

AUTHORS
    Kevin Goess, <cpan@goess.org>
    Mike Schilli, <m@perlmeister.com>

    June, 2002

SEE ALSO
http://jakarta.apache.org/log4j/docs/