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from __future__ import absolute_import, unicode_literals
from datetime import datetime
from itertools import count
from time import time
from celery import states
from celery.events import Event as _Event
from celery.events.state import State, Worker, Task
from celery.utils import gen_unique_id
from djcelery import celery
from djcelery import snapshot
from djcelery import models
from djcelery.utils import make_aware
from djcelery.tests.utils import unittest
from djcelery.compat import unicode
_ids = count(0)
_clock = count(1)
def Event(*args, **kwargs):
kwargs.setdefault('clock', next(_clock))
kwargs.setdefault('local_received', time())
return _Event(*args, **kwargs)
def create_task(worker, **kwargs):
d = dict(uuid=gen_unique_id(),
name='djcelery.unittest.task{0}'.format(next(_ids)),
worker=worker)
return Task(**dict(d, **kwargs))
class test_Camera(unittest.TestCase):
Camera = snapshot.Camera
def setUp(self):
self.state = State()
self.cam = self.Camera(self.state)
def test_constructor(self):
cam = self.Camera(State())
self.assertTrue(cam.state)
self.assertTrue(cam.freq)
self.assertTrue(cam.cleanup_freq)
self.assertTrue(cam.logger)
def test_get_heartbeat(self):
worker = Worker(hostname='fuzzie')
self.assertIsNone(self.cam.get_heartbeat(worker))
t1 = time()
t2 = time()
t3 = time()
for t in t1, t2, t3:
worker.event('heartbeat', t, t, {})
self.state.workers[worker.hostname] = worker
self.assertEqual(self.cam.get_heartbeat(worker),
make_aware(datetime.fromtimestamp(t3)))
def test_handle_worker(self):
worker = Worker(hostname='fuzzie')
worker.event('online', time(), time(), {})
self.cam._last_worker_write.clear()
m = self.cam.handle_worker((worker.hostname, worker))
self.assertTrue(m)
self.assertTrue(m.hostname)
self.assertTrue(m.last_heartbeat)
self.assertTrue(m.is_alive())
self.assertEqual(unicode(m), unicode(m.hostname))
self.assertTrue(repr(m))
def test_handle_task_received(self):
worker = Worker(hostname='fuzzie')
worker.event('oneline', time(), time(), {})
self.cam.handle_worker((worker.hostname, worker))
task = create_task(worker)
task.event('received', time(), time(), {})
self.assertEqual(task.state, 'RECEIVED')
mt = self.cam.handle_task((task.uuid, task))
self.assertEqual(mt.name, task.name)
self.assertTrue(unicode(mt))
self.assertTrue(repr(mt))
mt.eta = celery.now()
self.assertIn('eta', unicode(mt))
self.assertIn(mt, models.TaskState.objects.active())
def test_handle_task(self):
worker1 = Worker(hostname='fuzzie')
worker1.event('online', time(), time(), {})
mw = self.cam.handle_worker((worker1.hostname, worker1))
task1 = create_task(worker1)
task1.event('received', time(), time(), {})
mt = self.cam.handle_task((task1.uuid, task1))
self.assertEqual(mt.worker, mw)
worker2 = Worker(hostname=None)
task2 = create_task(worker2)
task2.event('received', time(), time(), {})
mt = self.cam.handle_task((task2.uuid, task2))
self.assertIsNone(mt.worker)
task1.event('succeeded', time(), time(), {'result': 42})
self.assertEqual(task1.state, states.SUCCESS)
self.assertEqual(task1.result, 42)
mt = self.cam.handle_task((task1.uuid, task1))
self.assertEqual(mt.name, task1.name)
self.assertEqual(mt.result, 42)
task3 = create_task(worker1, name=None)
task3.event('revoked', time(), time(), {})
mt = self.cam.handle_task((task3.uuid, task3))
self.assertIsNone(mt)
def assertExpires(self, dec, expired, tasks=10):
worker = Worker(hostname='fuzzie')
worker.event('online', time(), time(), {})
for total in range(tasks):
task = create_task(worker)
task.event('received', time() - dec, time() - dec, {})
task.event('succeeded', time() - dec, time() - dec, {'result': 42})
self.assertTrue(task.name)
self.assertTrue(self.cam.handle_task((task.uuid, task)))
self.assertEqual(self.cam.on_cleanup(), expired)
def test_on_cleanup_expires(self, dec=332000):
self.assertExpires(dec, 10)
def test_on_cleanup_does_not_expire_new(self, dec=0):
self.assertExpires(dec, 0)
def test_on_shutter(self):
state = self.state
cam = self.cam
ws = ['worker1.ex.com', 'worker2.ex.com', 'worker3.ex.com']
uus = [gen_unique_id() for i in range(50)]
events = [Event('worker-online', hostname=ws[0]),
Event('worker-online', hostname=ws[1]),
Event('worker-online', hostname=ws[2]),
Event('task-received',
uuid=uus[0], name='A', hostname=ws[0]),
Event('task-started',
uuid=uus[0], name='A', hostname=ws[0]),
Event('task-received',
uuid=uus[1], name='B', hostname=ws[1]),
Event('task-revoked',
uuid=uus[2], name='C', hostname=ws[2])]
for event in events:
event['local_received'] = time()
state.event(event)
cam.on_shutter(state)
for host in ws:
worker = models.WorkerState.objects.get(hostname=host)
self.assertTrue(worker.is_alive())
t1 = models.TaskState.objects.get(task_id=uus[0])
self.assertEqual(t1.state, 'STARTED')
self.assertEqual(t1.name, 'A')
t2 = models.TaskState.objects.get(task_id=uus[1])
self.assertEqual(t2.state, 'RECEIVED')
t3 = models.TaskState.objects.get(task_id=uus[2])
self.assertEqual(t3.state, 'REVOKED')
events = [Event('task-succeeded',
uuid=uus[0], hostname=ws[0], result=42),
Event('task-failed',
uuid=uus[1], exception="KeyError('foo')",
hostname=ws[1]),
Event('worker-offline', hostname=ws[0])]
list(map(state.event, events))
cam._last_worker_write.clear()
cam.on_shutter(state)
w1 = models.WorkerState.objects.get(hostname=ws[0])
self.assertFalse(w1.is_alive())
t1 = models.TaskState.objects.get(task_id=uus[0])
self.assertEqual(t1.state, 'SUCCESS')
self.assertEqual(t1.result, '42')
self.assertEqual(t1.worker, w1)
t2 = models.TaskState.objects.get(task_id=uus[1])
self.assertEqual(t2.state, 'FAILURE')
self.assertEqual(t2.result, "KeyError('foo')")
self.assertEqual(t2.worker.hostname, ws[1])
cam.on_shutter(state)
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