question: private void stop ( HttpServletRequest request , HttpServletResponse response ) throws IOException { PrintWriter out = response . getWriter ( ) ; String label = request . getParameter ( "stop" ) ; Monitor mon = removeMon ( label , null , DEFAULT_UNITS ) ; if ( mon == null ) { out . println ( ERROR + ": stop requires that an existing label is passed in.  For example: curl http://localhost:8080/jamon/Mon?stop=mylabel" ) ; } else { mon . stop ( ) ; out . println ( OK + ": stop successfully called on - " + mon ) ; } }
target:  stop a previously started monitor if it exists. 