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Client API: mutex on (user_id, room_id)

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Changed variable name used for the mutexes map
Changed the place where the mutex is locked
Changed unlock to a defered call instead of manually calling it
This commit is contained in:
Anand Vasudevan 2020-08-20 11:52:51 +05:30
parent a59a190564
commit e0f1dd77e2
1 changed files with 8 additions and 10 deletions
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18
clientapi/routing/sendevent.go
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@ -37,7 +37,7 @@ type sendEventResponse struct {
}
var (
mutexes sync.Map // (roomID+userID) -> mutex. mutexes to ensure correct ordering of sendEvents
userRoomSendMutexes sync.Map // (roomID+userID) -> mutex. mutexes to ensure correct ordering of sendEvents
)
// SendEvent implements:
@ -68,6 +68,13 @@ func SendEvent(
}
}
// create a mutex for the specific user in the specific room
// this avoids a situation where events that are received in quick succession are sent to the roomserver in a jumbled order
userID := device.UserID
mutex, _ := userRoomSendMutexes.LoadOrStore(roomID+userID, &sync.Mutex{})
mutex.(*sync.Mutex).Lock()
defer mutex.(*sync.Mutex).Unlock()
e, resErr := generateSendEvent(req, device, roomID, eventType, stateKey, cfg, rsAPI)
if resErr != nil {
return *resErr
@ -81,12 +88,6 @@ func SendEvent(
}
}
// create a mutex for the specific user in the specific room
// this avoids a situation where events that are received in quick succession are sent to the roomserver in a jumbled order
userID := device.UserID
mutex, _ := mutexes.LoadOrStore(roomID+userID, &sync.Mutex{})
mutex.(*sync.Mutex).Lock()
// pass the new event to the roomserver and receive the correct event ID
// event ID in case of duplicate transaction is discarded
eventID, err := api.SendEvents(
@ -99,7 +100,6 @@ func SendEvent(
)
if err != nil {
util.GetLogger(req.Context()).WithError(err).Error("SendEvents failed")
mutex.(*sync.Mutex).Unlock()
return jsonerror.InternalServerError()
}
util.GetLogger(req.Context()).WithFields(logrus.Fields{
@ -108,8 +108,6 @@ func SendEvent(
"room_version": verRes.RoomVersion,
}).Info("Sent event to roomserver")
mutex.(*sync.Mutex).Unlock()
res := util.JSONResponse{
Code: http.StatusOK,
JSON: sendEventResponse{eventID},