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# -*- test-case-name: epsilon.test.test_react -*-
# Copyright (c) 2008 Divmod. See LICENSE for details.
"""
Utilities for running the reactor for a while.
"""
from twisted.python.log import err
def react(reactor, main, argv):
"""
Call C{main} and run the reactor until the L{Deferred} it returns fires.
@param reactor: An unstarted L{IReactorCore} provider which will be run and
later stopped.
@param main: A callable which returns a L{Deferred}. It should take as
many arguments as there are elements in the list C{argv}.
@param argv: A list of arguments to pass to C{main}.
@return: C{None}
"""
stopping = []
reactor.addSystemEventTrigger('before', 'shutdown', stopping.append, True)
finished = main(reactor, *argv)
finished.addErrback(err, "main function encountered error")
def cbFinish(ignored):
if not stopping:
reactor.callWhenRunning(reactor.stop)
finished.addCallback(cbFinish)
reactor.run()
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