"Edmon Begoli" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Hi, > > This question is directed towards Tomcat developers or Tomcat API experts. > > We are trying to establish an inspection mechanism that will track key > parameters > of Tomcat's over the period of time including severe peaks and low usage > times. > > The key parameters that we interested in are: > > > - Current number of threads that are servicing web requests on the > HTTP or AJP connector, >
Easily done with a Valve: Just increment the counter on entry and decrement it on exit. But be certain to use java.util.concurrent (or a sync block) if you absolutely need the count to be accurate. > > > - Current number of database connections utilized > > If you are using Tomcat's DataSource, then you should be able to get it from http://jakarta.apache.org/commons/dbcp/apidocs/org/apache/commons/dbcp/BasicDataSource.html#getNumActive(). Note that Tomcat repackages this as o.a.t.dbcp.dbcp.BasicDataSource. Otherwise, consult your provider's documentation. > > - Current size of the backlog queue of waiting http/ajp requests > Tomcat doesn't expose it's ServerSockets, and even if it did it wouldn't help. You'll need to get this probably externally in an O/S dependant way. > > We want to output these parameter on a periodic basis, say every 30 sec so > that we can track the Tomcat's > behavior over time and over different loads. > > > I am aware of MBean server and how to access it via tool like JConsole. > > However, use of the JConsole on the hardened environement where only JRE > is > used > and where only few ports are open is not feaseable. Plus, it provides a > snapshot and not aggregate data. > > What we would like to do/have is some form of a Tomcat valve or simply > a separate component that is periodically dumping these values that I > listed > above. > > > Can someone please advise me on the appropriate API, preferably directly > accessible and not via JMX that would enable me to get that information. > > -- > Thank you, > Edmon Begoli > http://blogs.ittoolbox.com/eai/software > --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
