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|
{-# LANGUAGE AllowAmbiguousTypes #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE OverloadedRecordDot #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE TypeFamilies #-}
module Hsm.Core.Zmq.Server
( Server
, send
, runServer
) where
import Data.Binary (Binary)
import Data.Text (Text, pack, unpack)
import Effectful (Dispatch(Static), DispatchOf, Eff, IOE, (:>))
import Effectful.Dispatch.Static qualified as E
import Effectful.Log (Log, localDomain, logInfo_, logTrace_)
import Effectful.Reader.Static (Reader, ask)
import Effectful.Resource (Resource)
import GHC.Records (HasField)
import Hsm.Core.Message (message)
import Hsm.Core.Zmq (withSocket)
import Streamly.Data.Fold qualified as S (drain)
import Streamly.Data.Stream qualified as S (Stream, fold, mapM)
import System.ZMQ4 qualified as Z
data Server a b
type instance DispatchOf Server = Static E.WithSideEffects
newtype instance E.StaticRep Server =
Server (Z.Socket Z.Pub)
domain :: Text
domain = "server"
send ::
forall env es a.
( HasField "name" env Text
, Log :> es
, Reader env :> es
, Server :> es
, Binary a
, Show a
)
=> S.Stream (Eff es) a
-> Eff es ()
send = S.fold S.drain . S.mapM sender
where
sender payload = do
Server sock <- E.getStaticRep
env <- ask @env
E.unsafeEff_ $ Z.send sock [] $ message env.name payload
localDomain domain $ logTrace_ $ "Message sent: " <> pack (show payload)
runServer ::
forall env es a.
( HasField "pubEp" env Text
, IOE :> es
, Log :> es
, Reader env :> es
, Resource :> es
)
=> Eff (Server : es) a
-> Eff es a
runServer action =
withSocket Z.Pub >>= \sock ->
E.evalStaticRep (Server sock) $ do
localDomain domain $ do
logInfo_ "Initializing ZMQ server"
env <- ask @env
E.unsafeEff_ $ Z.bind sock $ unpack env.pubEp
logTrace_ $ "Publishing to " <> env.pubEp
action
|
