How to determine which measure a midi is playing

I'm playing a midi file, and I know how many bars/measures it has.
Now, I would like to be notified when the midi goes to the next bar/measure.
I suppose either ControllerEventListener or MetaEventListener is able to do this, but I don't know which, and I dont know how.
Could anyone give me a hint?

c'mon, someone must know how to do this =PMIDI sequencers don't have bars, they have sequence timing. If you want bars, you have to do the calculation from sequence time to music time, and calculate how many bars in you are.

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