handler - why PersistStateMachineHandler added listener,but listener don't work well -


i created statemachine statemachinefactory , statepersist handler. in document, executing handler.handleeventwithstate method can trigger listener, code run failes. has idea why?

@override public void submit(string machineid, string curstatus,long[] ids) {     statemachine<string, string> machine = statemachinefactory.getstatemachine(machineid);     persiststatemachinehandler handler = new persiststatemachinehandler(machine);     handler.addpersiststatechangelistener(new testlistener(jdbctemplate));     system.out.println("状态机是否终结：" + machine.iscomplete() + "machine-uuid:"+machine.getuuid());     state<string, string> s = machine.getinitialstate();     system.out.println("状态id：" + s.getid() );     if(machine.iscomplete()) {         machine.start();     }     machine.sendevent("start");     system.out.println("状态机是否终结：" + machine.iscomplete()+ machine.getstate().getid());     handler.handleeventwithstate(messagebuilder.withpayload("start").setheader("ids", ids).build(), curstatus); }


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