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Replace EventGrouper for ServiceQueuer to move to push-based txns. Fix tests and add stub tests for ServiceQueuer.

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This commit is contained in:
Kegan Dougal 2015-03-16 13:15:40 +00:00
parent c9c444f562
commit 6279285b2a
2 changed files with 57 additions and 98 deletions
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61
synapse/appservice/scheduler.py
View file

@ -16,11 +16,11 @@
This module controls the reliability for application service transactions.
The nominal flow through this module looks like:
_________
---ASa[e]-->| Event |
----ASb[e]->| Grouper |<-poll 1/s--+
--ASa[e]--->|_________| | ASa[e,e] ASb[e]
V
__________
1---ASa[e]-->| Service |--> Queue ASa[f]
2----ASb[e]->| Queuer |
3--ASa[f]--->|__________|-----------+ ASa[e], ASb[e]
V
-````````- +------------+
|````````|<--StoreTxn-|Transaction |
|Database| | Controller |---> SEND TO AS
@ -66,14 +66,14 @@ class AppServiceScheduler(object):
self.clock = clock
self.store = store
self.as_api = as_api
self.event_grouper = _EventGrouper()
def create_recoverer(service, callback):
return _Recoverer(clock, store, as_api, service, callback)
self.txn_ctrl = _TransactionController(
clock, store, as_api, self.event_grouper, create_recoverer
clock, store, as_api, create_recoverer
)
self.queuer = _ServiceQueuer(self.txn_ctrl)
@defer.inlineCallbacks
def start(self):
@ -86,17 +86,26 @@ class AppServiceScheduler(object):
self.txn_ctrl.start_polling()
def submit_event_for_as(self, service, event):
self.event_grouper.enqueue(service, event)
self.queuer.enqueue(service, event)
class _EventGrouper(object):
"""Groups events for the same application service together.
class _ServiceQueuer(object):
"""Queues events for the same application service together, sending
transactions as soon as possible. Once a transaction is sent successfully,
this schedules any other events in the queue to run.
"""
def __init__(self):
def __init__(self, txn_ctrl):
self.groups = {} # dict of {service: [events]}
self.txn_ctrl = txn_ctrl
def enqueue(self, service, event):
# if nothing in queue for this service, send event immediately and add
# callbacks.
self.txn_ctrl.send(service, [event])
# else add to queue for this service
if service not in self.groups:
self.groups[service] = []
self.groups[service].append(event)
@ -109,34 +118,30 @@ class _EventGrouper(object):
class _TransactionController(object):
def __init__(self, clock, store, as_api, event_grouper, recoverer_fn):
def __init__(self, clock, store, as_api, recoverer_fn):
self.clock = clock
self.store = store
self.as_api = as_api
self.event_grouper = event_grouper
self.recoverer_fn = recoverer_fn
# keep track of how many recoverers there are
self.recoverers = []
@defer.inlineCallbacks
def start_polling(self):
def send(self, service, events):
try:
groups = self.event_grouper.drain_groups()
for service in groups:
txn = yield self.store.create_appservice_txn(
service=service,
events=groups[service]
)
service_is_up = yield self._is_service_up(service)
if service_is_up:
sent = yield txn.send(self.as_api)
if sent:
txn.complete(self.store)
else:
self._start_recoverer(service)
txn = yield self.store.create_appservice_txn(
service=service,
events=events
)
service_is_up = yield self._is_service_up(service)
if service_is_up:
sent = yield txn.send(self.as_api)
if sent:
txn.complete(self.store)
else:
self._start_recoverer(service)
except Exception as e:
logger.exception(e)
self.clock.call_later(1, self.start_polling)
@defer.inlineCallbacks
def on_recovered(self, recoverer):

94
tests/appservice/test_scheduler.py
View file

@ -14,7 +14,7 @@
# limitations under the License.
from synapse.appservice import ApplicationServiceState, AppServiceTransaction
from synapse.appservice.scheduler import (
_EventGrouper, _TransactionController, _Recoverer
_ServiceQueuer, _TransactionController, _Recoverer
)
from twisted.internet import defer
from ..utils import MockClock
@ -28,25 +28,21 @@ class ApplicationServiceSchedulerTransactionCtrlTestCase(unittest.TestCase):
self.clock = MockClock()
self.store = Mock()
self.as_api = Mock()
self.event_grouper = Mock()
self.recoverer = Mock()
self.recoverer_fn = Mock(return_value=self.recoverer)
self.txnctrl = _TransactionController(
clock=self.clock, store=self.store, as_api=self.as_api,
event_grouper=self.event_grouper, recoverer_fn=self.recoverer_fn
recoverer_fn=self.recoverer_fn
)
def test_poll_single_group_service_up(self):
def test_single_service_up_txn_sent(self):
# Test: The AS is up and the txn is successfully sent.
service = Mock()
events = [Mock(), Mock()]
groups = {}
groups[service] = events
txn_id = "foobar"
txn = Mock(id=txn_id, service=service, events=events)
# mock methods
self.event_grouper.drain_groups = Mock(return_value=groups)
self.store.get_appservice_state = Mock(
return_value=defer.succeed(ApplicationServiceState.UP)
)
@ -56,7 +52,7 @@ class ApplicationServiceSchedulerTransactionCtrlTestCase(unittest.TestCase):
)
# actual call
self.txnctrl.start_polling()
self.txnctrl.send(service, events)
self.store.create_appservice_txn.assert_called_once_with(
service=service, events=events # txn made and saved
@ -64,15 +60,12 @@ class ApplicationServiceSchedulerTransactionCtrlTestCase(unittest.TestCase):
self.assertEquals(0, len(self.txnctrl.recoverers)) # no recoverer made
txn.complete.assert_called_once_with(self.store) # txn completed
def test_poll_single_group_service_down(self):
def test_single_service_down(self):
# Test: The AS is down so it shouldn't push; Recoverers will do it.
# It should still make a transaction though.
service = Mock()
events = [Mock(), Mock()]
groups = {}
groups[service] = events
self.event_grouper.drain_groups = Mock(return_value=groups)
txn = Mock(id="idhere", service=service, events=events)
self.store.get_appservice_state = Mock(
return_value=defer.succeed(ApplicationServiceState.DOWN)
@ -82,7 +75,7 @@ class ApplicationServiceSchedulerTransactionCtrlTestCase(unittest.TestCase):
)
# actual call
self.txnctrl.start_polling()
self.txnctrl.send(service, events)
self.store.create_appservice_txn.assert_called_once_with(
service=service, events=events # txn made and saved
@ -90,18 +83,15 @@ class ApplicationServiceSchedulerTransactionCtrlTestCase(unittest.TestCase):
self.assertEquals(0, txn.send.call_count) # txn not sent though
self.assertEquals(0, txn.complete.call_count) # or completed
def test_poll_single_group_service_up(self):
def test_single_service_up_txn_not_sent(self):
# Test: The AS is up and the txn is not sent. A Recoverer is made and
# started.
service = Mock()
events = [Mock(), Mock()]
groups = {}
groups[service] = events
txn_id = "foobar"
txn = Mock(id=txn_id, service=service, events=events)
# mock methods
self.event_grouper.drain_groups = Mock(return_value=groups)
self.store.get_appservice_state = Mock(
return_value=defer.succeed(ApplicationServiceState.UP)
)
@ -112,7 +102,7 @@ class ApplicationServiceSchedulerTransactionCtrlTestCase(unittest.TestCase):
)
# actual call
self.txnctrl.start_polling()
self.txnctrl.send(service, events)
self.store.create_appservice_txn.assert_called_once_with(
service=service, events=events
@ -125,12 +115,6 @@ class ApplicationServiceSchedulerTransactionCtrlTestCase(unittest.TestCase):
service, ApplicationServiceState.DOWN # service marked as down
)
def test_poll_no_groups(self):
self.as_api.push_bulk = Mock()
self.event_grouper.drain_groups = Mock(return_value={})
self.txnctrl.start_polling()
self.assertEquals(0, self.as_api.push_bulk.call_count)
class ApplicationServiceSchedulerRecovererTestCase(unittest.TestCase):
@ -205,54 +189,24 @@ class ApplicationServiceSchedulerRecovererTestCase(unittest.TestCase):
self.callback.assert_called_once_with(self.recoverer)
class ApplicationServiceSchedulerEventGrouperTestCase(unittest.TestCase):
class ApplicationServiceSchedulerQueuerTestCase(unittest.TestCase):
def setUp(self):
self.grouper = _EventGrouper()
self.txn_ctrl = Mock()
self.queuer = _ServiceQueuer(self.txn_ctrl)
def test_drain_single_event(self):
service = Mock()
event = Mock()
self.grouper.enqueue(service, event)
groups = self.grouper.drain_groups()
self.assertTrue(service in groups)
self.assertEquals([event], groups[service])
self.assertEquals(1, len(groups.keys()))
# no more events
self.assertEquals(self.grouper.drain_groups(), {})
def test_send_single_event_no_queue(self):
# Expect the event to be sent immediately.
pass
def test_drain_multiple_events(self):
service = Mock()
events = [Mock(), Mock(), Mock()]
for e in events:
self.grouper.enqueue(service, e)
groups = self.grouper.drain_groups()
self.assertTrue(service in groups)
self.assertEquals(events, groups[service])
# no more events
self.assertEquals(self.grouper.drain_groups(), {})
def test_send_single_event_with_queue(self):
# - Send an event and don't resolve it just yet.
# - Send another event: expect send() to NOT be called.
# - Resolve the send event
# - Expect queued event to be sent
pass
def test_drain_multiple_services(self):
services = [Mock(), Mock(), Mock()]
events_a = [Mock(), Mock()]
events_b = [Mock()]
events_c = [Mock(), Mock(), Mock(), Mock()]
mappings = {
services[0]: events_a,
services[1]: events_b,
services[2]: events_c
}
for e in events_b:
self.grouper.enqueue(services[1], e)
for e in events_c:
self.grouper.enqueue(services[2], e)
for e in events_a:
self.grouper.enqueue(services[0], e)
groups = self.grouper.drain_groups()
for service in services:
self.assertTrue(service in groups)
self.assertEquals(mappings[service], groups[service])
self.assertEquals(3, len(groups.keys()))
# no more events
self.assertEquals(self.grouper.drain_groups(), {})
def test_multiple_service_queues(self):
# Tests that each service has its own queue, and that they don't block
# on each other.
pass