42 lines
1.2 KiB
Python
42 lines
1.2 KiB
Python
from celery.task.base import Task, PeriodicTask
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from celery.execute import send_task
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from oyster.client import get_configured_client
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class UpdateTask(Task):
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# results go straight to database
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ignore_result = True
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def __init__(self):
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# one client per process
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client = get_configured_client()
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def run(self, doc_id):
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# maybe fetch doc instead?
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doc = client.db.tracked.find_one({'_id': doc_id})
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client.update(doc)
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for hook in doc.get('post_update_hooks', []):
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send_task(hook, (doc_id,))
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client.db.status.update({}, {'$inc': {'update_queue': -1}})
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class UpdateTaskScheduler(PeriodicTask):
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# 60s tick
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run_every = 60
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def run(self):
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# if the update queue isn't empty, wait to add more
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# (currently the only way we avoid duplicates)
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# alternate option would be to set a _queued flag on documents
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if client.db.status.find_one()['update_queue']:
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return
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next_set = client.get_update_queue()
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for doc in next_set:
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update_task.delay(doc['_id'])
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client.db.status.update({}, {'$inc': {'update_queue': 1}})
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