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?
