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from rq import Queue, SimpleWorker, Worker
from rq.job import Dependency, Job, JobStatus
from tests import RQTestCase
from tests.fixtures import check_dependencies_are_met, div_by_zero, say_hello
class TestDependencies(RQTestCase):
def test_allow_failure_is_persisted(self):
"""Ensure that job.allow_dependency_failures is properly set
when providing Dependency object to depends_on."""
dep_job = Job.create(func=say_hello)
# default to False, maintaining current behavior
job = Job.create(func=say_hello, depends_on=Dependency([dep_job]))
job.save()
Job.fetch(job.id, connection=self.testconn)
self.assertFalse(job.allow_dependency_failures)
job = Job.create(func=say_hello, depends_on=Dependency([dep_job], allow_failure=True))
job.save()
job = Job.fetch(job.id, connection=self.testconn)
self.assertTrue(job.allow_dependency_failures)
jobs = Job.fetch_many([job.id], connection=self.testconn)
self.assertTrue(jobs[0].allow_dependency_failures)
def test_job_dependency(self):
"""Enqueue dependent jobs only when appropriate"""
q = Queue(connection=self.testconn)
w = SimpleWorker([q], connection=q.connection)
# enqueue dependent job when parent successfully finishes
parent_job = q.enqueue(say_hello)
job = q.enqueue_call(say_hello, depends_on=parent_job)
w.work(burst=True)
job = Job.fetch(job.id, connection=self.testconn)
self.assertEqual(job.get_status(), JobStatus.FINISHED)
q.empty()
# don't enqueue dependent job when parent fails
parent_job = q.enqueue(div_by_zero)
job = q.enqueue_call(say_hello, depends_on=parent_job)
w.work(burst=True)
job = Job.fetch(job.id, connection=self.testconn)
self.assertNotEqual(job.get_status(), JobStatus.FINISHED)
q.empty()
# don't enqueue dependent job when Dependency.allow_failure=False (the default)
parent_job = q.enqueue(div_by_zero)
dependency = Dependency(jobs=parent_job)
job = q.enqueue_call(say_hello, depends_on=dependency)
w.work(burst=True)
job = Job.fetch(job.id, connection=self.testconn)
self.assertNotEqual(job.get_status(), JobStatus.FINISHED)
# enqueue dependent job when Dependency.allow_failure=True
parent_job = q.enqueue(div_by_zero)
dependency = Dependency(jobs=parent_job, allow_failure=True)
job = q.enqueue_call(say_hello, depends_on=dependency)
job = Job.fetch(job.id, connection=self.testconn)
self.assertTrue(job.allow_dependency_failures)
w.work(burst=True)
job = Job.fetch(job.id, connection=self.testconn)
self.assertEqual(job.get_status(), JobStatus.FINISHED)
# When a failing job has multiple dependents, only enqueue those
# with allow_failure=True
parent_job = q.enqueue(div_by_zero)
job_allow_failure = q.enqueue(say_hello, depends_on=Dependency(jobs=parent_job, allow_failure=True))
job = q.enqueue(say_hello, depends_on=Dependency(jobs=parent_job, allow_failure=False))
w.work(burst=True, max_jobs=1)
self.assertEqual(parent_job.get_status(), JobStatus.FAILED)
self.assertEqual(job_allow_failure.get_status(), JobStatus.QUEUED)
self.assertEqual(job.get_status(), JobStatus.DEFERRED)
q.empty()
# only enqueue dependent job when all dependencies have finished/failed
first_parent_job = q.enqueue(div_by_zero)
second_parent_job = q.enqueue(say_hello)
dependencies = Dependency(jobs=[first_parent_job, second_parent_job], allow_failure=True)
job = q.enqueue_call(say_hello, depends_on=dependencies)
w.work(burst=True, max_jobs=1)
self.assertEqual(first_parent_job.get_status(), JobStatus.FAILED)
self.assertEqual(second_parent_job.get_status(), JobStatus.QUEUED)
self.assertEqual(job.get_status(), JobStatus.DEFERRED)
# When second job finishes, dependent job should be queued
w.work(burst=True, max_jobs=1)
self.assertEqual(second_parent_job.get_status(), JobStatus.FINISHED)
self.assertEqual(job.get_status(), JobStatus.QUEUED)
w.work(burst=True)
job = Job.fetch(job.id, connection=self.testconn)
self.assertEqual(job.get_status(), JobStatus.FINISHED)
# Test dependant is enqueued at front
q.empty()
parent_job = q.enqueue(say_hello)
q.enqueue(say_hello, job_id='fake_job_id_1', depends_on=Dependency(jobs=[parent_job]))
q.enqueue(say_hello, job_id='fake_job_id_2', depends_on=Dependency(jobs=[parent_job], enqueue_at_front=True))
w.work(burst=True, max_jobs=1)
self.assertEqual(q.job_ids, ["fake_job_id_2", "fake_job_id_1"])
def test_dependency_list_in_depends_on(self):
"""Enqueue with Dependency list in depends_on"""
q = Queue(connection=self.testconn)
w = SimpleWorker([q], connection=q.connection)
# enqueue dependent job when parent successfully finishes
parent_job1 = q.enqueue(say_hello)
parent_job2 = q.enqueue(say_hello)
job = q.enqueue_call(say_hello, depends_on=[Dependency([parent_job1]), Dependency([parent_job2])])
w.work(burst=True)
self.assertEqual(job.get_status(), JobStatus.FINISHED)
def test_enqueue_job_dependency(self):
"""Enqueue via Queue.enqueue_job() with depencency"""
q = Queue(connection=self.testconn)
w = SimpleWorker([q], connection=q.connection)
# enqueue dependent job when parent successfully finishes
parent_job = Job.create(say_hello)
parent_job.save()
job = Job.create(say_hello, depends_on=parent_job)
q.enqueue_job(job)
w.work(burst=True)
self.assertEqual(job.get_status(), JobStatus.DEFERRED)
q.enqueue_job(parent_job)
w.work(burst=True)
self.assertEqual(parent_job.get_status(), JobStatus.FINISHED)
self.assertEqual(job.get_status(), JobStatus.FINISHED)
def test_dependencies_are_met_if_parent_is_canceled(self):
"""When parent job is canceled, it should be treated as failed"""
queue = Queue(connection=self.testconn)
job = queue.enqueue(say_hello)
job.set_status(JobStatus.CANCELED)
dependent_job = queue.enqueue(say_hello, depends_on=job)
# dependencies_are_met() should return False, whether or not
# parent_job is provided
self.assertFalse(dependent_job.dependencies_are_met(job))
self.assertFalse(dependent_job.dependencies_are_met())
def test_can_enqueue_job_if_dependency_is_deleted(self):
queue = Queue(connection=self.testconn)
dependency_job = queue.enqueue(say_hello, result_ttl=0)
w = Worker([queue])
w.work(burst=True)
assert queue.enqueue(say_hello, depends_on=dependency_job)
def test_dependencies_are_met_if_dependency_is_deleted(self):
queue = Queue(connection=self.testconn)
dependency_job = queue.enqueue(say_hello, result_ttl=0)
dependent_job = queue.enqueue(say_hello, depends_on=dependency_job)
w = Worker([queue])
w.work(burst=True, max_jobs=1)
assert dependent_job.dependencies_are_met()
assert dependent_job.get_status() == JobStatus.QUEUED
def test_dependencies_are_met_at_execution_time(self):
queue = Queue(connection=self.testconn)
queue.empty()
queue.enqueue(say_hello, job_id="A")
queue.enqueue(say_hello, job_id="B")
job_c = queue.enqueue(check_dependencies_are_met, job_id="C", depends_on=["A", "B"])
job_c.dependencies_are_met()
w = Worker([queue])
w.work(burst=True)
assert job_c.result
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