Hi,
Finally I used a log4j file appender which produces json data.
https://github.com/logstash/log4j-jsonevent-layout

It produces json event that logstash can directly eat in json_event format.
To insert some custom fields, I search the "@fields" attribute in json and
I replace it with my custom fields.

Thanks for the tip
Mika


On Tue, Jun 11, 2013 at 1:45 PM, Botond Botyanszki <[email protected]> wrote:

> Hi,
>
> There are various appenders for log4j which could be used, e.g:
> http://logging.apache.org/log4j/2.x/manual/appenders.html#SyslogAppender
> http://www.rsyslog.com/tag/log4j/
> Probably you can find some appender/formatter which writes in JSON if
> that's better.
> Otherwise if it is not possible to change the configuration on the
> application side, nxlog can be set up to read from the logfiles.
>
> Regards,
> Botond
>
> On Tue, 11 Jun 2013 11:34:54 +0200
> Mika Wanadoo <[email protected]> wrote:
>
> > Hi,
> >
> > could you tell me if it's possible to use NXLOG as a log4j listener ?
> > The need is :
> >
> >  - configure log4j in java env with a socketappender that will talk to
> nxlog
> >  - make nxlog listening to log4j info
> >  - maybe some pattern matching
> >  - forward event to logstash for example
> >
> > Do you think I could do that with im_tcp ?
> > Or is a log4j dedicated input planned for future release ?
> >
> > Regards,
> > Mikael
>
>
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