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# pylint: disable=super-on-old-class |
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from operator import itemgetter |
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from urlparse import urljoin |
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import requests |
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from st2reactor.sensor.base import PollingSensor |
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class EventsConsumerSensor(PollingSensor): |
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def __init__(self, sensor_service, config=None): |
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super(EventsConsumerSensor, self).__init__(sensor_service=sensor_service, |
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config=config) |
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self._trigger_ref = 'opscenter.event' |
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self._logger = self._sensor_service.get_logger(__name__) |
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self._base_url = self._config['opscenter_base_url'] |
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if not self._base_url.endswith('/'): |
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self._base_url = self._base_url + '/' |
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self._cluster_id = self._config['cluster_id'] |
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self._events_url = self._cluster_id + '/events' |
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self._last_timestamp = None |
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def setup(self): |
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pass |
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def poll(self): |
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last_timestamp = self._get_last_timestamp() |
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events = self._query_events(last_timestamp) |
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if events: |
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events.sort(key=itemgetter('timestamp'), reverse=True) |
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last_timestamp = events[0]['timestamp'] |
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self._set_last_timestamp(last_timestamp) |
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for event in events: |
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self._dispatch_trigger_for_event(event=event) |
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def cleanup(self): |
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pass |
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def add_trigger(self, trigger): |
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pass |
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def update_trigger(self, trigger): |
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pass |
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def remove_trigger(self, trigger): |
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pass |
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def _query_events(self, timestamp=None, count_per_batch=50): |
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params = {} |
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params['count'] = count_per_batch |
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params['reverse'] = '0' # gets all newer events > timestamp. |
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if timestamp: |
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params['timestamp'] = timestamp |
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all_events = [] |
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done = False |
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while not done: |
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events = requests.get(self._get_events_url(), params=params).json() |
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all_events.extend(events) |
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done = (len(events) < count_per_batch) |
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return all_events |
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def _get_events_url(self): |
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return urljoin(self._base_url, self._events_url) |
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def _get_last_timestamp(self): |
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if not self._last_timestamp and hasattr(self._sensor_service, 'get_value'): |
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self._last_timestamp = long(self._sensor_service.get_value(name='last_timestamp')) |
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return self._last_timestamp |
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def _set_last_timestamp(self, last_timestamp): |
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self._last_timestamp = str(last_timestamp) |
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if hasattr(self._sensor_service, 'set_value'): |
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self._sensor_service.set_value(name='last_timestamp', value=last_timestamp) |
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def _dispatch_trigger_for_event(self, event): |
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trigger = self._trigger_ref |
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payload = event |
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self._sensor_service.dispatch(trigger=trigger, payload=payload) |
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StackStorm /
st2contrib
