def start(self):
"""
Start process.
.. note::
Process will be considered started, when defined banner will appear
in process output.
"""
Executor.start(self)
# get a polling object
self.poll_obj = select.poll()
# register a file descriptor
# POLLIN because we will wait for data to read
self.poll_obj.register(self.output(), select.POLLIN)
try:
self.wait_for(self._wait_for_output)
# unregister the file descriptor and delete the polling object
self.poll_obj.unregister(self.output())
finally:
del self.poll_obj
def __init__(self, command, banner, shell=False, timeout=None, sleep=0.1):
"""
Initialize OutputExecutor executor.
:param str command: command to run to start service
:param str banner: string that has to appear in process output -
should compile to regular expression.
:param bool shell: see `subprocess.Popen`
:param int timeout: time to wait for process to start or stop.
if None, wait indefinitely.
:param float sleep: how often to check for start/stop condition
"""
Executor.__init__(self, command, shell, timeout, sleep)
self._banner = re.compile(banner)