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Use ObservableDeferreds instead of Deferreds as they behave as intended

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This commit is contained in:
Kegan Dougal 2016-11-11 14:54:10 +00:00
parent c7daf3136c
commit 42c43cfafd
2 changed files with 31 additions and 30 deletions
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39
synapse/rest/client/v1/room.py
View File

@ -22,6 +22,7 @@ from synapse.streams.config import PaginationConfig
from synapse.api.constants import EventTypes, Membership
from synapse.api.filtering import Filter
from synapse.types import UserID, RoomID, RoomAlias
from synapse.util.async import ObservableDeferred
from synapse.events.utils import serialize_event, format_event_for_client_v2
from synapse.http.servlet import (
parse_json_object_from_request, parse_string, parse_integer
@ -57,14 +58,14 @@ class RoomCreateRestServlet(ClientV1RestServlet):
def on_PUT(self, request, txn_id):
try:
res_deferred = self.txns.get_client_transaction(request, txn_id)
res = yield res_deferred
res = yield res_deferred.observe()
defer.returnValue(res)
except KeyError:
pass
res_deferred = self.on_POST(request)
res_deferred = ObservableDeferred(self.on_POST(request))
self.txns.store_client_transaction(request, txn_id, res_deferred)
response = yield res_deferred
response = yield res_deferred.observe()
defer.returnValue(response)
@defer.inlineCallbacks
@ -218,14 +219,14 @@ class RoomSendEventRestServlet(ClientV1RestServlet):
def on_PUT(self, request, room_id, event_type, txn_id):
try:
res_deferred = self.txns.get_client_transaction(request, txn_id)
res = yield res_deferred
res = yield res_deferred.observe()
defer.returnValue(res)
except KeyError:
pass
res_deferred = self.on_POST(request, room_id, event_type, txn_id)
res_deferred = ObservableDeferred(self.on_POST(request, room_id, event_type, txn_id))
self.txns.store_client_transaction(request, txn_id, res_deferred)
response = yield res_deferred
response = yield res_deferred.observe()
defer.returnValue(response)
@ -287,14 +288,14 @@ class JoinRoomAliasServlet(ClientV1RestServlet):
def on_PUT(self, request, room_identifier, txn_id):
try:
res_deferred = self.txns.get_client_transaction(request, txn_id)
res = yield res_deferred
res = yield res_deferred.observe()
defer.returnValue(res)
except KeyError:
pass
res_deferred = self.on_POST(request, room_identifier, txn_id)
res_deferred = ObservableDeferred(self.on_POST(request, room_identifier, txn_id))
self.txns.store_client_transaction(request, txn_id, res_deferred)
response = yield res_deferred
response = yield res_deferred.observe()
defer.returnValue(response)
@ -541,14 +542,14 @@ class RoomForgetRestServlet(ClientV1RestServlet):
def on_PUT(self, request, room_id, txn_id):
try:
res_deferred = self.txns.get_client_transaction(request, txn_id)
res = yield res_deferred
res = yield res_deferred.observe()
defer.returnValue(res)
except KeyError:
pass
res_deferred = self.on_POST(request, room_id, txn_id)
res_deferred = ObservableDeferred(self.on_POST(request, room_id, txn_id))
self.txns.store_client_transaction(request, txn_id, res_deferred)
response = yield res_deferred
response = yield res_deferred.observe()
defer.returnValue(response)
@ -624,15 +625,15 @@ class RoomMembershipRestServlet(ClientV1RestServlet):
@defer.inlineCallbacks
def on_PUT(self, request, room_id, membership_action, txn_id):
try:
res_deferred = self.txns.get_client_transaction(request, txn_id)
res = yield res_deferred
res_deferred = ObservableDeferred(self.txns.get_client_transaction(request, txn_id))
res = yield res_deferred.observe()
defer.returnValue(res)
except KeyError:
pass
res_deferred = self.on_POST(request, room_id, membership_action, txn_id)
res_deferred = ObservableDeffself.on_POST(request, room_id, membership_action, txn_id)
self.txns.store_client_transaction(request, txn_id, res_deferred)
response = yield res_deferred
response = yield res_deferred.observe()
defer.returnValue(response)
@ -669,14 +670,14 @@ class RoomRedactEventRestServlet(ClientV1RestServlet):
def on_PUT(self, request, room_id, event_id, txn_id):
try:
res_deferred = self.txns.get_client_transaction(request, txn_id)
res = yield res_deferred
res = yield res_deferred.observe()
defer.returnValue(res)
except KeyError:
pass
res_deferred = self.on_POST(request, room_id, event_id, txn_id)
res_deferred = ObservableDeferred(self.on_POST(request, room_id, event_id, txn_id))
self.txns.store_client_transaction(request, txn_id, res_deferred)
response = yield res_deferred
response = yield res_deferred.observe()
defer.returnValue(response)

22
synapse/rest/client/v1/transactions.py
View File

@ -25,32 +25,32 @@ logger = logging.getLogger(__name__)
class HttpTransactionCache(object):
def __init__(self):
# { key : (txn_id, response_deferred) }
# { key : (txn_id, res_observ_defer) }
self.transactions = {}
def _get_response(self, key, txn_id):
try:
(last_txn_id, response_deferred) = self.transactions[key]
(last_txn_id, res_observ_defer) = self.transactions[key]
if txn_id == last_txn_id:
logger.info("get_response: Returning a response for %s", txn_id)
return response_deferred
return res_observ_defer
except KeyError:
pass
return None
def _store_response(self, key, txn_id, response_deferred):
self.transactions[key] = (txn_id, response_deferred)
def _store_response(self, key, txn_id, res_observ_defer):
self.transactions[key] = (txn_id, res_observ_defer)
def store_client_transaction(self, request, txn_id, response_deferred):
def store_client_transaction(self, request, txn_id, res_observ_defer):
"""Stores the request/Promise<response> pair of an HTTP transaction.
Args:
request (twisted.web.http.Request): The twisted HTTP request. This
request must have the transaction ID as the last path segment.
response_deferred (Promise<tuple>): A tuple of (response code, response dict)
res_observ_defer (Promise<tuple>): A tuple of (response code, response dict)
txn_id (str): The transaction ID for this request.
"""
self._store_response(self._get_key(request), txn_id, response_deferred)
self._store_response(self._get_key(request), txn_id, res_observ_defer)
def get_client_transaction(self, request, txn_id):
"""Retrieves a stored response if there was one.
@ -64,10 +64,10 @@ class HttpTransactionCache(object):
Raises:
KeyError if the transaction was not found.
"""
response_deferred = self._get_response(self._get_key(request), txn_id)
if response_deferred is None:
res_observ_defer = self._get_response(self._get_key(request), txn_id)
if res_observ_defer is None:
raise KeyError("Transaction not found.")
return response_deferred
return res_observ_defer
def _get_key(self, request):
token = get_access_token_from_request(request)