def _execute(self):
"""Private function that finds out the handler and execute it."""
action_name = self.action.lower()
method_name = action_name.replace('user', 'do')
method = getattr(self, method_name, None)
if method is None:
reason = _('Unsupported action: %s') % self.action
EVENT.error(self.context, self.user, self.action, 'Failed', reason)
return self.RES_ERROR, reason
return method()
def set_status(self, result, reason=None):
"""Set action status based on return value from execute."""
timestamp = wallclock()
if result == self.RES_OK:
status = self.SUCCEEDED
db_api.action_mark_succeeded(self.context, self.id, timestamp)
elif result == self.RES_ERROR:
status = self.FAILED
db_api.action_mark_failed(self.context, self.id, timestamp,
reason=reason or 'ERROR')
elif result == self.RES_TIMEOUT:
status = self.FAILED
db_api.action_mark_failed(self.context, self.id, timestamp,
reason=reason or 'TIMEOUT')
elif result == self.RES_CANCEL:
status = self.CANCELLED
db_api.action_mark_cancelled(self.context, self.id, timestamp)
else: # result == self.RES_RETRY:
status = self.READY
# Action failed at the moment, but can be retried
# We abandon it and then notify other dispatchers to execute it
db_api.action_abandon(self.context, self.id)
if status == self.SUCCEEDED:
EVENT.info(self.context, self, self.action, status, reason)
elif status == self.READY:
EVENT.warning(self.context, self, self.action, status, reason)
else:
EVENT.error(self.context, self, self.action, status, reason)
self.status = status
self.status_reason = reason
def signal(self, cmd):
'''Send a signal to the action.'''
if cmd not in self.COMMANDS:
return
if cmd == self.SIG_CANCEL:
expected_statuses = (self.INIT, self.WAITING, self.READY,
self.RUNNING)
elif cmd == self.SIG_SUSPEND:
expected_statuses = (self.RUNNING)
else: # SIG_RESUME
expected_statuses = (self.SUSPENDED)
if self.status not in expected_statuses:
reason = _("Action (%(action)s) is in unexpected status "
"(%(actual)s) while expected status should be one of "
"(%(expected)s).") % dict(action=self.id,
expected=expected_statuses,
actual=self.status)
EVENT.error(self.context, self, cmd, status_reason=reason)
return
db_api.action_signal(self.context, self.id, cmd)
