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send prepared subscriptions and clean up on success

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Trolli Schmittlauch 2020-08-12 15:23:10 +02:00
parent 2e88a4079b
commit c1ce386b65
1 changed files with 11 additions and 3 deletions
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12
src/Hash2Pub/PostService.hs
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@ -311,7 +311,7 @@ clientDeliverSubscriptions :: PostService d
-> IO (Either String ()) -- Either signals success or failure
clientDeliverSubscriptions serv fromTag toTag (toHost, toPort) = do
-- collect tag intearval
intervalTags <- takeRMapSuccessorsFromTo (genKeyID $ Txt.unpack fromTag) (genKeyID $ Txt.unpack fromTag) <$> readTVarIO (subscribers serv)
intervalTags <- takeRMapSuccessorsFromTo (genKeyID $ Txt.unpack fromTag) (genKeyID $ Txt.unpack toTag) <$> readTVarIO (subscribers serv)
-- returns a [ (TagSubscribersSTM, TChan PostID, Hashtag) ]
-- extract subscribers and posts
-- no need for extracting as a single atomic operation, as newly incoming posts are supposed to be rejected because of already having re-positioned on the DHT
@ -333,7 +333,15 @@ clientDeliverSubscriptions serv fromTag toTag (toHost, toPort) = do
""
intervalTags
-- send subscribers
-- on failure return a Left, otherwise flush remaining queues atomically, schedule all newly arrived posts to still be relayed and delete subscription entry
httpMan <- HTTP.newManager HTTP.defaultManagerSettings
resp <- runClientM (subscriptionDeliveryClient subscriberData) (mkClientEnv httpMan (BaseUrl Http toHost (fromIntegral toPort) ""))
-- on failure return a Left, otherwise delete subscription entry
case resp of
Left err -> pure . Left . show $ err
Right _ -> do
atomically $
modifyTVar' (subscribers serv) $ \tagMap ->
foldr deleteRMapEntry tagMap ((\(_, _, t) -> genKeyID . Txt.unpack $ t) <$> intervalTags)
pure . Right $ ()
where
channelGetAll :: TChan a -> STM [a]