[EMAIL PROTECTED] wrote: -
> There are a number of independent systems all logging using log4j to their
> own respective log files. The intended use for this system is to keep
> track
> of daily, weekly, monthly..etc stats for a particular system (assumed in
> this case to be a single log).
>
> I'm trying to use the log4j Receivers to bring the logging events that
> post
> to those files (or any type of receiver (appender?, let me know if I'm
> getting the terminology wrong)) back into my system to handle them. I
> need
> to grab the events as the Receiver gets them so I can convert them into my
> domain objects and do what I need with them. It would be helpful if there
> were some event hooks that I could use for when a log message is received,
> but I haven't been able to find anything yet.
When I do this sort of thing I typically configure log4j on my remote apps to
log to a SocketHubAppender - no changes to code required, I just add an
appender to the log4j config, e.g.:-
# Socket hub appender that passes logs to anyone who connects on port 9009
log4j.appender.Socket=org.apache.log4j.net.SocketHubAppender
log4j.appender.Socket.Port=9009
Then in my remote "receiver" app I spawn simple threads to connect to each
host's SocketHubAppender and grab all logging events with something like...
Socket s = new Socket("whateverhost", 9009);
ObjectInputStream ois = new ObjectInputStream(s.getInputStream());
while (true) {
LoggingEvent event = (LoggingEvent) ois.readObject();
log.debug("remote event:'" + event.getMessage() + "'");
}
You can get fancy with it and have the "receiver" app do whatever you like with
the messages: I tend to write them to a database (with a nice robust JDBC async
appender I wrote :) ).
Hope that helps,
Michael Erskine.
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