def test_mainline(self):
"""
Test mainline message flow between a worker and its Pool. The worker
polls for a task and when one is received, the worker sends back the
results of executing that task.
"""
pool = pools_base.Pool(name="MyPool",
size=1,
worker_type=ControllableWorker)
# Start the pool via its context manager - this starts the Pool's main
# work loop in a separate thread.
with pool:
assert pool.is_alive and pool.active
assert pool.status.tag == pool.status.STARTED
# Retrieve the only worker assigned to this pool.
assert len(pool._workers) == 1
worker = pool._workers["0"]
assert worker.is_alive and worker.active
assert worker.status.tag == worker.status.STARTED
msg_factory = communication.Message(**worker.metadata)
# Send a TaskPullRequest from the worker to the Pool. The Pool
# should respond with an Ack since no Tasks have been added yet.
received = worker.transport.send_and_receive(
msg_factory.make(msg_factory.TaskPullRequest, data=1))
assert received.cmd == communication.Message.Ack
# Add a task to the pool.
task1 = Task(target=Runnable(5))
pool.add(task1, uid=task1.uid())
# Send in another TaskPullRequest - the Pool should respond with
# the task we just added.
received = worker.transport.send_and_receive(
msg_factory.make(msg_factory.TaskPullRequest, data=1))
assert received.cmd == communication.Message.TaskSending
assert len(received.data) == 1
assert received.data[0] == task1
# Execute the task and send back the TaskResults.
task_result = worker.execute(task1)
results = [task_result]
received = worker.transport.send_and_receive(
msg_factory.make(msg_factory.TaskResults, data=results))
assert received.cmd == communication.Message.Ack
# Check that the pool now has the results stored.
assert pool._results[task1.uid()] == task_result
# The Pool and its work loop should be stopped on exiting the context
# manager.
assert pool.status.tag == pool.status.STOPPED
def test_pool_basic():
dirname = os.path.dirname(os.path.abspath(__file__))
path = os.path.join(dirname, 'tasks', 'data', 'relative')
task1 = Task(target=Runnable(5))
task2 = Task(target='Runnable', module='sample_tasks', path=path,
args=(10,), kwargs=dict(multiplier=3))
assert task1.materialize().run() == 10
assert task2.materialize().run() == 30
pool = pools_base.Pool(
name='MyPool', size=4, runpath=default_runpath)
pool.add(task1, uid=task1.uid())
pool.add(task2, uid=task2.uid())
assert pool._input[task1.uid()] is task1
assert pool._input[task2.uid()] is task2
with pool:
while pool.ongoing:
pass
assert pool.get(task1.uid()).result ==\
pool.results[task1.uid()].result == 10
assert pool.get(task2.uid()).result ==\
pool.results[task2.uid()].result == 30
