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A subscription worker which works over ClientSnocket. It is integrated into data diffusion `Ouroboros.Network.Diffusion`. * `ouroboros-network` - compiler and runs all its tests on Windows. * `ouroboros-consensus` - windows support is tracked in #1082
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ouroboros-network/src/Ouroboros/Network/Subscription/Client.hs
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|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| {-# LANGUAGE NamedFieldPuns #-} | ||
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| -- Subscription worker for client applications connecting with 'ClientSnocket' | ||
| -- which is using either unix sockets or Windows' named pipes. | ||
| -- | ||
| module Ouroboros.Network.Subscription.Client | ||
| ( ClientSubscriptionParams (..) | ||
| , clientSubscriptionWorker | ||
| ) where | ||
|
|
||
| import Control.Monad.Class.MonadTime | ||
| import Control.Tracer | ||
|
|
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| import Data.Void (Void) | ||
| import Data.Functor.Identity (Identity (..)) | ||
|
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| import Ouroboros.Network.Snocket ( ClientAddress | ||
| , ClientSnocket | ||
| , ClientFD | ||
| ) | ||
| import Ouroboros.Network.ErrorPolicy ( ErrorPolicies | ||
| , ErrorPolicyTrace | ||
| , WithAddr | ||
| , completeApplicationTx | ||
| ) | ||
| import Ouroboros.Network.Socket (NetworkMutableState (..)) | ||
| import Ouroboros.Network.Subscription.Ip (socketStateChangeTx, mainTx) | ||
| import Ouroboros.Network.Subscription.Worker | ||
| import Ouroboros.Network.Subscription.Subscriber | ||
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| data ClientSubscriptionParams a = ClientSubscriptionParams | ||
| { cspAddress :: !ClientAddress | ||
| -- ^ unix socket or named pipe address | ||
| , cspConnectionAttemptDelay :: !(Maybe DiffTime) | ||
| -- ^ delay between connection attempts | ||
| , cspErrorPolicies :: !ErrorPolicies | ||
| -- ^ error policies for subscription worker | ||
| } | ||
|
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||
| -- | Client subscription worker keeps subsribing to the 'ClientAddress' using | ||
| -- either unix socket or named pipe. | ||
| -- | ||
| clientSubscriptionWorker | ||
| :: ClientSnocket | ||
| -> Tracer IO (SubscriptionTrace ClientAddress) | ||
| -> Tracer IO (WithAddr ClientAddress ErrorPolicyTrace) | ||
| -> NetworkMutableState ClientAddress | ||
| -> ClientSubscriptionParams a | ||
| -> (ClientFD -> IO a) | ||
| -> IO Void | ||
| clientSubscriptionWorker snocket | ||
| tracer | ||
| errorPolicyTracer | ||
| NetworkMutableState { nmsConnectionTable, nmsPeerStates } | ||
| ClientSubscriptionParams { cspAddress | ||
| , cspConnectionAttemptDelay | ||
| , cspErrorPolicies | ||
| } | ||
| k = | ||
| worker tracer | ||
| errorPolicyTracer | ||
| nmsConnectionTable | ||
| nmsPeerStates | ||
| snocket | ||
| WorkerCallbacks | ||
| { wcSocketStateChangeTx = socketStateChangeTx | ||
| , wcCompleteApplicationTx = completeApplicationTx cspErrorPolicies | ||
| , wcMainTx = mainTx | ||
| } | ||
| workerParams | ||
| k | ||
| where | ||
| workerParams = WorkerParams { | ||
| wpLocalAddresses = Identity cspAddress, | ||
| wpSelectAddress = \_ (Identity addr) -> Just addr, | ||
| wpConnectionAttemptDelay = const cspConnectionAttemptDelay, | ||
| wpSubscriptionTarget = pure (constantSubscriptionTarget cspAddress), | ||
| wpValency = 1 | ||
| } |
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