Hi,
Thanks for your response. I am aware of the activeSessions attribute under
"Catalina:type=Manager,path=/testapp,host=localhost". I am actually doing
this programmatically and would like to know of an Mbean that would tell me
if the application is available. The activeSessions attribute can sometimes
report 0 even when the application is available so it is not reliable.
Thanks
On Thu, Jan 6, 2011 at 6:29 PM, Pid <p...@pidster.com> wrote:
> On 1/6/11 6:07 PM, Ziggy wrote:
> > I was looking at the code for the Tomcat Manager application to try and
> find
> > out how it is determining whether a webapp/context is running and how
> many
> > sesions are active. Looking at the code i think it uses these two methods
> >
> > Context.getAvailalbe() //check if available
> > Context.getManager().findSessions().length // Number of sessions.
> >
> > Here is the relevant function
> >
> > protected void list(PrintWriter writer) {
> >
> > if (debug >= 1)
> > log("list: Listing contexts for virtual host '" +
> > host.getName() + "'");
> >
> > writer.println(sm.getString("managerServlet.listed",
> > host.getName()));
> > Container[] contexts = host.findChildren();
> > for (int i = 0; i < contexts.length; i++) {
> > Context context = (Context) contexts[i];
> > String displayPath = context.getPath();
> > if( displayPath.equals("") )
> > displayPath = "/";
> > if (context != null ) {
> > if (context.getAvailable()) {
> >
> writer.println(sm.getString("managerServlet.listitem",
> > displayPath,
> > "running",
> > "" +
> > context.getManager().findSessions().length,
> > context.getDocBase()));
> > } else {
> >
> writer.println(sm.getString("managerServlet.listitem",
> > displayPath,
> > "stopped",
> > "0",
> > context.getDocBase()));
> > }
> > }
> > }
> > }
> >
> > I was looking at the above for the above information as i am working on a
> > client tool that tries to find out this exact information. The tool i am
> > using connects to Tomcat via JMX but i am not sure if i can get the same
> > information via JMX. Can i access the Context class? or is there any
> other
> > way (Mbeans?) i can check if a context is running via JMX?
>
> Connect to a Tomcat instance using JConsole and look for the 'Manager'
> objects.
>
> Catalina:type=Manager,path=/app01,host=localhost
>
> There's an attribute 'activeSessions'.
>
>
> p
>
>
>
