I am working on a small Tomcat servlet to monitor other tomcat-based
applications running on the same physical machine, and am trying to
figure out the best way to communicate between the monitoring app, and
the monitored apps.
My setup has several tomcat instances of a single application, each
running from its own directory, and listening on its own TCP port. So
there is no direct communication between the instances.
I'm trying to monitor various data about the application, not about
tomcat itself or the JVM. So I want to collect such things as the number
of requests it has processed, the last data received, etc, and not
things like memory and cpu usage. It is my app, so I can (and expect to
need to) add methods or servlets to return the information I want to
collect.
My question is, what is the best way to make the request to get the
data? Would URL request from the monitoring app to the monitored app
be appropriate, and then parse the response out for display in a
browser? If so, what java class is likely to be useful for this
communication? I will have all the information needed to connect to the
application instance (server, port, etc), but want it to be portable
across OS types.
Thanks!
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