def f(x):
with Lock("x") as lock:
client = get_client()
assert client.get_metadata("locked") is False
client.set_metadata("locked", True)
sleep(0.05)
assert client.get_metadata("locked") is True
client.set_metadata("locked", False)
def f(x):
with Lock('x') as lock:
client = get_client()
assert client.get_metadata('locked') is False
client.set_metadata('locked', True)
sleep(0.05)
assert client.get_metadata('locked') is True
client.set_metadata('locked', False)
def f(_):
client = get_client()
with MultiLock(names=["x"]):
assert client.get_metadata("locked") is False
client.set_metadata("locked", True)
sleep(0.05)
assert client.get_metadata("locked") is True
client.set_metadata("locked", False)
def f(x):
with Lock('x') as lock:
client = get_client()
assert client.get_metadata('locked') is False
client.set_metadata('locked', True)
sleep(0.05)
assert client.get_metadata('locked') is True
client.set_metadata('locked', False)
def test_lock_sync(client):
def f(x):
with Lock('x') as lock:
client = get_client()
assert client.get_metadata('locked') is False
client.set_metadata('locked', True)
sleep(0.05)
assert client.get_metadata('locked') is True
client.set_metadata('locked', False)
client.set_metadata('locked', False)
futures = client.map(f, range(10))
client.gather(futures)
def test_lock_sync(client):
def f(x):
with Lock('x') as lock:
client = get_client()
assert client.get_metadata('locked') is False
client.set_metadata('locked', True)
sleep(0.05)
assert client.get_metadata('locked') is True
client.set_metadata('locked', False)
client.set_metadata('locked', False)
futures = client.map(f, range(10))
client.gather(futures)
def observe_state(sem):
"""
This function is 100% artificial and acts as an observer to verify
our assumptions. The function will wait until both payload tasks are
executing, i.e. we're in an oversubscription scenario. It will then
try to acquire and hopefully fail showing that the semaphore is
protected if the oversubscription is recognized.
"""
sem.refresh_callback.stop()
# We wait until we're in an oversubscribed state, i.e. both tasks
# are executed although there should only be one allowed
while not sem.get_value() > 1:
sleep(0.2)
# Once we're in an oversubscribed state, we must not be able to
# acquire a lease.
assert not sem.acquire(timeout=0)
client = get_client()
client.set_metadata("release", True)
