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84 lines
4.0 KiB
84 lines
4.0 KiB
import threading
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import queue
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# Requests for checking on the site use a pool of thread Workers managed by a Queue.
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class update_worker(threading.Thread):
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current_uuid = None
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def __init__(self, q, notification_q, app, datastore, *args, **kwargs):
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self.q = q
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self.app = app
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self.notification_q = notification_q
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self.datastore = datastore
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super().__init__(*args, **kwargs)
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def run(self):
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from backend import fetch_site_status
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update_handler = fetch_site_status.perform_site_check(datastore=self.datastore)
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while not self.app.config.exit.is_set():
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try:
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uuid = self.q.get(block=False)
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except queue.Empty:
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pass
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else:
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self.current_uuid = uuid
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if uuid in list(self.datastore.data['watching'].keys()):
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try:
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changed_detected, result, contents = update_handler.run(uuid)
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except PermissionError as e:
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self.app.logger.error("File permission error updating", uuid, str(e))
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except Exception as e:
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self.app.logger.error("Exception reached", uuid, str(e))
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else:
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if result:
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try:
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self.datastore.update_watch(uuid=uuid, update_obj=result)
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if changed_detected:
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# A change was detected
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newest_version_file_contents = ""
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self.datastore.save_history_text(uuid=uuid, contents=contents, result_obj=result)
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watch = self.datastore.data['watching'][uuid]
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print (">> Change detected in UUID {} - {}".format(uuid, watch['url']))
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# Get the newest snapshot data to be possibily used in a notification
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newest_key = self.datastore.get_newest_history_key(uuid)
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if newest_key:
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with open(watch['history'][newest_key], 'r') as f:
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newest_version_file_contents = f.read().strip()
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n_object = {
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'watch_url': watch['url'],
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'uuid': uuid,
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'current_snapshot': newest_version_file_contents
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}
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# Did it have any notification alerts to hit?
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if len(watch['notification_urls']):
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print(">>> Notifications queued for UUID from watch {}".format(uuid))
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n_object['notification_urls'] = watch['notification_urls']
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self.notification_q.put(n_object)
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# No? maybe theres a global setting, queue them all
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elif len(self.datastore.data['settings']['application']['notification_urls']):
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print(">>> Watch notification URLs were empty, using GLOBAL notifications for UUID: {}".format(uuid))
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n_object['notification_urls'] = self.datastore.data['settings']['application']['notification_urls']
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self.notification_q.put(n_object)
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else:
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print(">>> NO notifications queued, watch and global notification URLs were empty.")
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except Exception as e:
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print("!!!! Exception in update_worker !!!\n", e)
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self.current_uuid = None # Done
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self.q.task_done()
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self.app.config.exit.wait(1)
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