On 6/4/09 4:12 PM, Doug Farrell wrote: > Hi all, > > I'm using the twisted.internet.task.LoopingCall system to run periodic > tasks in a Twisted server. If I had code like this: > > from twisted.internet.task import LoopingCall > > lp = LoopingCall(someFunction) > lp.start(5.0) # run every 5 seconds > > > Is there anything in LoopingCall to keep it from trying to run > someFunction() if the previous call is still running? For instance a > call to someFunction() takes longer than 5 seconds, will LoopingCall > hold off or will it call someFuction() anyway causing two 'instances' to > run? > > Thanks, > Doug
per http://twistedmatrix.com/documents/current/api/twisted.internet.task.LoopingCall.html If someFunction returns a Deferred, it will not be rescheduled if the Deferred has not fired. e.g. def someFunction(): d = someDeferredReturningOperation() d.addCallbacks(success, error) return d lp = LoopingCall(someFunction) lp.start(5.0) # run every 5 seconds Lucas _______________________________________________ Twisted-Python mailing list Twisted-Python@twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
