question: public void shutdown ( ShutdownModeAmp mode ) { stop ( mode ) ; if ( ! _lifecycle . toDestroy ( ) ) { return ; } Thread thread = Thread . currentThread ( ) ; ClassLoader oldLoader = thread . getContextClassLoader ( ) ; try { thread . setContextClassLoader ( _classLoader ) ; TreeSet < SubSystem > systems = new TreeSet < SubSystem > ( new StopComparator ( ) ) ; systems . addAll ( _systemMap . values ( ) ) ; _systemMap . clear ( ) ; for ( SubSystem system : systems ) { try { system . destroy ( ) ; } catch ( Throwable e ) { log . log ( Level . WARNING , e . toString ( ) , e ) ; } } WeakReference < SystemManager > globalRef = _globalSystemRef ; if ( globalRef != null && globalRef . get ( ) == this ) { _globalSystemRef = null ; } log . fine ( this + " destroyed" ) ; _classLoader . destroy ( ) ; } finally { thread . setContextClassLoader ( oldLoader ) ; _classLoader = null ; } }
target:  Shuts down the server in the given mode.