def _perform_add_event(self, response_sequence):
"""
Given a sequence of functions that take an intent and returns a
response (or raises an exception), perform :func:`add_event` and
return the result.
"""
log = object()
eff = add_event(self.event, 'tid', 'ord', log)
uid = '00000000-0000-0000-0000-000000000000'
svrq = service_request(
ServiceType.CLOUD_FEEDS,
'POST',
'autoscale/events',
headers={'content-type': ['application/vnd.rackspace.atom+json']},
data=self._get_request('INFO', uid, 'tid'),
log=log,
success_pred=has_code(201),
json_response=False)
seq = [
(TenantScope(mock.ANY, 'tid'),
nested_sequence([
retry_sequence(
Retry(effect=svrq,
should_retry=ShouldDelayAndRetry(
can_retry=mock.ANY,
next_interval=exponential_backoff_interval(2))),
response_sequence)
]))
]
return perform_sequence(seq, eff)
def _perform_add_event(self, response_sequence):
"""
Given a sequence of functions that take an intent and returns a
response (or raises an exception), perform :func:`add_event` and
return the result.
"""
log = object()
eff = add_event(self.event, 'tid', 'ord', log)
uid = '00000000-0000-0000-0000-000000000000'
svrq = service_request(
ServiceType.CLOUD_FEEDS, 'POST', 'autoscale/events',
headers={
'content-type': ['application/vnd.rackspace.atom+json']},
data=self._get_request('INFO', uid, 'tid'), log=log,
success_pred=has_code(201),
json_response=False)
seq = [
(TenantScope(mock.ANY, 'tid'), nested_sequence([
retry_sequence(
Retry(effect=svrq, should_retry=ShouldDelayAndRetry(
can_retry=mock.ANY,
next_interval=exponential_backoff_interval(2))),
response_sequence
)
]))
]
return perform_sequence(seq, eff)
def test_can_have_a_different_should_retry_function(self):
"""
The ``should_retry`` function does not have to be a
:obj:`ShouldDelayAndRetry`.
"""
expected = Retry(effect=Effect(1), should_retry=ANY)
actual = Retry(effect=Effect(1), should_retry=lambda _: False)
seq = [
retry_sequence(expected, [lambda _: raise_(Exception())])
]
self.assertRaises(Exception,
perform_sequence, seq, Effect(actual))
def test_retry_sequence_fails_if_mismatch_sequence(self):
"""
Fail if the wrong number of performers are given.
"""
r = Retry(
effect=Effect(1),
should_retry=ShouldDelayAndRetry(
can_retry=retry_times(5),
next_interval=repeating_interval(10)))
seq = [
retry_sequence(r, [lambda _: raise_(Exception()),
lambda _: raise_(Exception())])
]
self.assertRaises(AssertionError,
perform_sequence, seq, Effect(r))
def test_do_not_have_to_expect_an_exact_can_retry(self):
"""
The expected retry intent does not actually have to specify the
exact ``can_retry`` function, since it might just be a lambda,
which is hard to compare or hash.
"""
expected = Retry(effect=Effect(1), should_retry=ANY)
actual = Retry(effect=Effect(1), should_retry=ShouldDelayAndRetry(
can_retry=lambda _: False,
next_interval=repeating_interval(10)))
seq = [
retry_sequence(expected, [lambda _: raise_(Exception())])
]
self.assertRaises(Exception,
perform_sequence, seq, Effect(actual))
def test_retry_sequence_retries_without_delays(self):
"""
Perform the wrapped effect with the performers given,
without any delay even if the original intent had a delay.
"""
r = Retry(
effect=Effect(1),
should_retry=ShouldDelayAndRetry(
can_retry=retry_times(5),
next_interval=repeating_interval(10)))
seq = [
retry_sequence(r, [lambda _: raise_(Exception()),
lambda _: raise_(Exception()),
lambda _: "yay done"])
]
self.assertEqual(perform_sequence(seq, Effect(r)), "yay done")
def test_fallback(self):
"""
Accept a ``fallback`` dispatcher that will be used if a performer
returns an effect for an intent that is not covered by the base
dispatcher.
"""
def dispatch_2(intent):
if intent == 2:
return sync_performer(lambda d, i: "yay done")
r = Retry(
effect=Effect(1),
should_retry=ShouldDelayAndRetry(
can_retry=retry_times(5),
next_interval=repeating_interval(10)))
seq = [
retry_sequence(r, [lambda _: Effect(2)],
fallback_dispatcher=ComposedDispatcher(
[dispatch_2, base_dispatcher]))
]
self.assertEqual(perform_sequence(seq, Effect(r)), "yay done")
