CODEWITHSUNDEEP
javaspringtimerspring-statemachine
Amir
Amir

Reputation: 652

Spring State-Machine additional thread when using timers

I'm using spring state-machine in a java application. To move between states we should use some events (called them Timer Event). It seems a thread is in charge to managing the timers that is set to determine when a movement between states will be occurred (definitely the state-machine will decide based on timers if nothing happen in a state that we are in). After adding a timer event to a transition (using Papyrus for defining state-machine), I see a remaining live thread even after main method completes. I have two questions; first, what is this thread (I mean, this thread is the same one that manages timer), and second, how can i terminate the thread at the end of my work?

Upvotes: 0

Views: 1175

Answers (1)

Janne Valkealahti
Janne Valkealahti

Reputation: 2646

Timers are scheduled via Spring TaskScheduler and with annotation based JavaConfig default instance of ConcurrentTaskScheduler is created. This is done in StateMachineCommonConfiguration

If you want to modify this you can provide your own TaskScheduler either by overriding bean with name taskScheduler of use other machine configuration methods to set it. Default ConcurrentTaskScheduler indeed is a based on single-thread executor which is what you see. These are discussed more in a Spring Framework documentation.

Upvotes: 0

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