Actually, what I would like to be able to do (if possible) is to contact
"syslogd" directly from Java using UDP. I want to avoid native code since
we need to have this work across all the platforms which support syslogd.
So does anyone know if it is possible to communicate to syslogd through UDP
and, if so, where might I find the protocol documented.
Cynthia
[EMAIL PROTECTED] wrote:
> Cynthia,
>
> Well, not exactly. What I have done is to make a daemon out of
> our Java application. I don't have much experience with threading
> under Linux, but someone mentioned on this list that signal handling
> can be tricky since the thread that receives the signal may not be
> the thread listening for it (I'm quoting from memory here, but I don't
> think I'm too far off base). A daemon, of course, should respond
> to signals, so I created a parent process in C to handle it with a
> child launching a Java VM via the Invocation API.
>
> To make a long story short (sorry for the winding answer), I created
> two pipes before forking and exec'ing the child. The first pipe is
> tied (with dup2) to both STDOUT and STDERR of the child process
> and the second pipe is tied to STDIN. All output from the Java
> application is routed to syslog. When the parent receives a signal
> to shutdown, it closes the second pipe. The main thread of the
> Java application is blocked reading System.in. When it detects
> the close, it simply cleans up and shuts down the application.
>
> For a simpler application, I'm sure you could implement a logging
> method to syslog via JNI without going through the trouble explained
> above. :-)
>
> Good luck,
> Russ
>
> [EMAIL PROTECTED] on 04/05/99 11:40:24 AM
>
> To: [EMAIL PROTECTED]
> cc: (bcc: Russell Pridemore/Lex/Lexmark)
> Subject: Using Syslog from Java
>
> Has anyone implemented the equivalent of the syslog commands --
> openlog, syslog and closelog-- in Java. If so, any pointers in terms of
> the protocol.
>
> Thanks,
> Cynthia Jeness
>
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