rbt wrote: >I have a win32 service written in Python. It works well. It sends a >report of the status of the machine via email periodically. The one >problem I have is this... while trying to send an email, the script >loops until a send happens and then it breaks. Should it be unable to >send, it sleeps for 10 minutes with time.sleep(600) and then wakes and >tries again. This is when the problem occurs. I can't stop the service >while the program is sleeping. When I try, it just hangs until a reboot. >Can some suggest how to fix this? > > Yes. Generally, most of the win32 services work like this:
- the main thread listens to win32 service commands - when starting the service, you should create a new worker thread that does the job for you - when stopping the service, your service should report win32service.SERVICE_STOP_PENDING immediately, and ask the worker thread to terminate - you should be continuously reporting win32service.SERVICE_STOP_PENDING until your workder thread has stopped Here is a simple module that uses a 'Processor' class and a new thread to do the work. (The full program is here: http://mess.hu/download/SimpleHTTPService.zip ) class Service(win32serviceutil.ServiceFramework): _svc_name_ = SERVICE_NAME _svc_display_name_ = SERVICE_DISPLAY def __init__(self, args): win32serviceutil.ServiceFramework.__init__(self, args) self.stopped = threading.Event() self.stopped.clear() self.logger = getLogger(SERVICE_NAME) def SvcStop(self): self.logger.info("Got SvcStop, trying to stop service...") self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING) self.stopped.set() def SvcDoRun(self): """Write an event log record - in debug mode we will also see this message printed.""" try: import servicemanager servicemanager.LogMsg( servicemanager.EVENTLOG_INFORMATION_TYPE, servicemanager.PYS_SERVICE_STARTED, (self._svc_name_, '') ) self.logger.info("Started.") self.logger.debug("Creating processor instance") processor = Processor(self.stopped) self.logger.debug("Starting processor thread") thread.start_new_thread(processor.Process,()) self.logger.debug("Waiting for the processor thread to finish") self.stopped.wait() self.logger.debug("Stopping") time.sleep(1) while not processor.stopped.isSet(): self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING, 5000) time.sleep(5) servicemanager.LogMsg( servicemanager.EVENTLOG_INFORMATION_TYPE, servicemanager.PYS_SERVICE_STOPPED, (self._svc_name_, "") ) self.logger.info("Stopped") except: self.logger.error('',exc_info = sys.exc_info()) if __name__=='__main__': win32serviceutil.HandleCommandLine(Service) -- http://mail.python.org/mailman/listinfo/python-list
