How to call external processes before & after WL services start/stop

I set up WL Admin Server and Managed Server to run as Windows services.
I have the code to retire/re-activate in an ANT script and right now, I execute it via the command line.
Here's my question
I want to retire a SOA composite BEFORE my Managed Server Windows service stops and re-activate it AFTER the Window service starts up.
Do you know how to do that? Or if you have other suggestions, please let me know
Thanks
I'm using 11.1.1.2

I want to retire a SOA composite BEFORE my Managed Server Windows service stops and re-activate it AFTER the Window service starts up.
This means you need to check for the ManagedServer is in RUNNING state right?
in WLST you can get State of a given Managed Server with getState() method. write a WLST invoke method in ANT and try.

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