dandri/simplexmq
1
0
Fork 0
mirror of https://github.com/simplex-chat/simplexmq.git synced 2026-05-25 14:14:54 +00:00
Code Issues Packages Projects Releases Wiki Activity

comment

Browse Source
This commit is contained in:
Evgeny Poberezkin
2025-05-22 13:16:23 +01:00
parent 01374d5a66
commit 0c962f2df6
1 changed files with 5 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/Simplex/Messaging/Server/Env/STM.hs
+5 -1
View File
@@ -306,9 +306,13 @@ data ServerSubscribers = ServerSubscribers
pendingEvents :: TVar (IntMap (NonEmpty (EntityId, BrokerMsg)))
}
-- not exported, to prevent concurrent Map lookups inside STM transactions.
-- not exported, to prevent accidental concurrent Map lookups inside STM transactions.
-- Map stores TVars with pointers to the clients rather than client ID to allow reading the same TVar
-- inside transactions to ensure that transaction is re-evaluated in case subscriber changes.
-- Storing Maybe allows to have continuity of subscription when the same user client disconnects and re-connects -
-- any STM transaction that reads subscribed client will re-evaluate in this case.
-- The subscriptions that were made at any point are not removed -
-- this is a better trade-off with intermittently connected mobile clients.
newtype SubscribedClients = SubscribedClients (TMap EntityId (TVar (Maybe AClient)))
getSubscribedClients :: SubscribedClients -> IO (Map EntityId (TVar (Maybe AClient)))