the servlet doesn't compile with JDK 1.3.x :
This method is only available with JDK 1.4 +.StatusManagerServlet.java:274: cannot resolve symbol [javac] symbol : method maxMemory () [javac] location: class java.lang.Runtime [javac] writer.print(Runtime.getRuntime().maxMemory()); [javac] ^ [javac] Note: Some input files use or override a deprecated API. [javac] Note: Recompile with -deprecation for details. [javac] 1 error
-- Jeanfrancois
Remy Maucherat wrote:
Remy Maucherat wrote:
Hi,
I proposed that to Costin a few days ago, but got not so enthusiastic comments.
The idea would be to add a new monitor servlet to the manager webapp. It would generate data similar to http://www.apache.org/server-status. It would mostly (exclusively ?) use JMX to retrieve the components statistics.
That's not a high priority task for me, but something I'd like to get done eventually, and I'm looking for some feedback. I understand that there are existing agents for JMX that can be used to provide more powerful remote access to the statistics (HTTP, RMI, etc), but these tools do not have the ability to give a user a quick and comprehensive look at the Tomcat status (although they allow much more complex operations, and it's not my objective to replace them).
I've committed a rough version of the monitoring servlet. It will display status information for all Coyote connectors, using JMX exclusively. I don't think there's any statistic missing (the amount of meaningful status information available to a Java program is definitely much lower than for a native Unix program, hence the "simpler" look when compared to the Apache status).
The thing is very rough, and could use contributions (hint, hint) :)
As for using it, the monitor servlet is linked from the default Tomcat welcome page. It currently requires the same credentials as the rest of the manager webapp to access.
Remy
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