servlets - Embedded Jetty: How do I call setSessionTrackingModes without a ServletContextListener -

i'm wiring embedded jetty server in main , want enforce cookies session tracking mode.

so try do:

//in main servletcontexthandler contexthandler =      new servletcontexthandler(servletcontexthandler.sessions);  contexthandler     .getservletcontext()     .setsessiontrackingmodes(enumset.of(sessiontrackingmode.cookie)); 

but following:

exception in thread "main" java.lang.illegalstateexception @ org.eclipse.jetty.servlet.servletcontexthandler$context.setsessiontrackingmodes(servletcontexthandler.java:1394) 

my servlet context not yet initialized.

the obvious solution in servletcontextlistener, i'd rather not. want wiring , setup stay in 1 central place without using listeners.

is there way?

the reason exception servletcontext doesn't exist yet (your server isn't started yet).

but there's 2 ways accomplish this.

technique 1) explicit session management:

    server server = new server(8080);      // specify session id manager     hashsessionidmanager idmanager = new hashsessionidmanager();     server.setsessionidmanager(idmanager);      // create sessionhandler handle sessions     hashsessionmanager manager = new hashsessionmanager();     manager.setsessiontrackingmodes(enumset.of(sessiontrackingmode.cookie)); // <-- here     sessionhandler sessions = new sessionhandler(manager);      // create servletcontext     servletcontexthandler context = new servletcontexthandler(servletcontexthandler.sessions);     context.setsessionhandler(sessions); // <-- set session handling     server.sethandler(context); 

this more appropriate way accomplish embedded jetty, can control entire creation / storage / behavior of sessions.

technique 2) use defaults, configure hashsessionmanager:

    server server = new server(8080);      // create servletcontext     servletcontexthandler context = new servletcontexthandler(servletcontexthandler.sessions);     context.getsessionhandler()            .getsessionmanager()            .setsessiontrackingmodes(enumset.of(sessiontrackingmode.cookie));     server.sethandler(context); 

for simple web apps work fine.