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celery_beat.py
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celery_beat.py
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import asyncio
from celery.schedules import crontab
from celery import Celery
import rethinkdb as r
from datetime import datetime, timedelta
import pytz
from celery.result import AsyncResult
import logging
from kombu import Queue, Exchange
app = Celery('celery_beat', broker='amqp://guest:guest@localhost:5672//', backend='rpc://',CELERY_DEFAULT_QUEUE='high_priority',CELERY_QUEUES=(Queue('high_priority'),Queue('mid_priority'), Queue('low_priority')))
logging.basicConfig(filename='beat.log', level=logging.INFO, format='%(asctime)s %(message)s', datefmt='%m/%d/%Y %I:%M:%S %p')
r.set_loop_type('asyncio')
tz = pytz.timezone('Asia/Kolkata')
async def connection():
return await r.connect(db='main_db')
@app.task
def check_for_revoke():
print('started')
print('printing queues',app.conf.task_queues[1])
loop = asyncio.get_event_loop()
task = loop.create_task(connection())
conn = loop.run_until_complete(task)
loop1 = asyncio.get_event_loop()
task1 = loop1.create_task(scan_db(conn))
results = loop1.run_until_complete(task1)
async def scan_db(conn):
now = datetime.now()
hour_from_now = timedelta(hours=1) + now
hour_before_now = now - timedelta(hours=1)
high_priority = now + timedelta(minutes=20)
mid_priority = high_priority + timedelta(minutes=20)
low_priority = mid_priority + timedelta(minutes=20)
#TODO:Check for past 1 hour for confirmation.
#TODO:Sort the certificates to be revoked in an hour based on their respective epoch and set priority.
print ('hour from now', hour_from_now.date())
collections = await r.table('share_assets').run(conn)
to_be_revoked_certs = []
while (await collections.fetch_next()):
item = await collections.next()
epoch_of_revoking = item['revoked_on']
datetime_of_revoking = datetime.fromtimestamp(epoch_of_revoking, tz)
print ('date of revoking', datetime_of_revoking.date())
keys = ['revoked_on', 'id']
if int(epoch_of_revoking) in range (int(now.timestamp()), int(hour_from_now.timestamp())):
to_be_revoked_dict = dict((k, item[k]) for k in keys)
to_be_revoked_certs.append(to_be_revoked_dict)
#API Call
print('Falls in 1 hour range')
# task_res = revoke_certi_task.apply_async((item['id'], epoch_of_revoking), eta=datetime_of_revoking)
# await task_status_logging(task_res.id, datetime_of_revoking)
if int(epoch_of_revoking) in range(int(hour_before_now.timestamp()), int(hour_from_now.timestamp())):
if item['revoked_flag'] == 1:
print('revoked certificate an hour ago with cid', item['id'])
else:
print('unrevoked certificate with cid',item['id'])
# task_res = revoke_certi_task.apply_async((item['id'], epoch_of_revoking), eta=datetime_of_revoking)
# await task_status_logging(task_res.id, datetime_of_revoking)
print(to_be_revoked_certs)
try:
for _dict in to_be_revoked_certs:
datetime_of_revoking = datetime.fromtimestamp(_dict['revoked_on'], tz)
if int(_dict['revoked_on']) in range(int(now.timestamp()), int(high_priority.timestamp())):
print('High Priority')
task_res = revoke_certi_task.apply_async((_dict['id'], _dict['revoked_on']), eta=datetime_of_revoking, queue=app.conf.task_queues[0])
# await task_status_logging(task_res.id, datetime_of_revoking)
if int(_dict['revoked_on']) in range(int(high_priority.timestamp()), int(mid_priority.timestamp())):
print('Mid Priority')
task_res = revoke_certi_task.apply_async((_dict['id'],_dict['revoked_on']), eta=datetime_of_revoking, queue=app.conf.task_queues[1])
# await task_status_logging(task_res.id, datetime_of_revoking)
if int(_dict['revoked_on']) in range(int(mid_priority.timestamp()), int(low_priority.timestamp())):
print('Low Priority')
task_res = revoke_certi_task.apply_async((_dict['id'], _dict['revoked_on']), eta=datetime_of_revoking, queue=app.conf.task_queues[2])
# await task_status_logging(task_res.id, datetime_of_revoking)
except TypeError as e:
print ('to_be_revoked_certs list is empty',e)
@app.task
def revoke_certi_task(c_id, revoke_date):
"""It is a celery task which takes two arguments
c_id --> Certificate id of the certificate to be revoked
revoke_date --> Date(epoch) on which the certificate should be revoked
"""
loop1 = asyncio.get_event_loop()
task1 = loop1.create_task(connection())
conn = loop1.run_until_complete(task1)
loop2 = asyncio.get_event_loop()
task2 = loop2.create_task(revoke_flag(c_id, conn, revoke_date))
loop2.run_until_complete(task2)
async def revoke_flag(c_id, conn, revoke_date):
"""The function takes 2 arguments and updates the revoked_flag to 1
c_id --> Certificate id of the certificate to be revoked
conn --> connection to rethinkdb asyncio pool"""
epoch_revoke_date = await (await r.table('share_assets').filter({'id' : c_id}).pluck('revoked_on').run(conn)).next()
iso_revoke_date = datetime.fromtimestamp(epoch_revoke_date['revoked_on'], tz)
if epoch_revoke_date['revoked_on'] == revoke_date:
print ('API Call')
#API Call
# return await r.table('share_assets').filter({'id' : c_id}).update({"revoked_flag" : 1}).run(conn)
# return await r.table(db_config['revoke_table']).filter({'c_id' : c_id}).update({"revoked_flag" : "1"}).run(conn)
else:
pass
print ('pass')
# task_res = revoke_certi_task.apply_async((c_id, epoch_revoke_date['revoked_on']),eta=iso_revoke_date)
# await task_status_logging(task_res.id, iso_revoke_date)
async def task_status_logging(task_id, revoke_date):
res = AsyncResult(task_id, app = app)
logging.info('X----------X------------TASK----------------X-----------X')
logging.info('Task has been registered with task id ' + str(task_id) + ' and will be excuted at ' + str(revoke_date))
return
app.conf.beat_schedule = {
"check-for-revoke-task": {
"task": "celery_beat.check_for_revoke",
"schedule": 20.0
}
}
app.conf.task_queues = (
Queue('high_priority', Exchange('high_priority'), routing_key='high_priority'),
Queue('mid_priority', Exchange('mid_priority'), routing_key='mid_priority'),
Queue('low_priority', Exchange('low_priority'), routing_key='low_priority')
)
app.conf.task_default_queue = 'default'
app.conf.task_default_exchange = 'default'
app.conf.task_default_routing_key = 'default'