diff options
Diffstat (limited to 'src/Erebos/Service.hs')
| -rw-r--r-- | src/Erebos/Service.hs | 40 |
1 files changed, 26 insertions, 14 deletions
diff --git a/src/Erebos/Service.hs b/src/Erebos/Service.hs index f8428d1..4499ef9 100644 --- a/src/Erebos/Service.hs +++ b/src/Erebos/Service.hs @@ -29,15 +29,22 @@ import Control.Monad.Writer import Data.Kind import Data.Typeable -import Data.UUID (UUID) -import qualified Data.UUID as U import Erebos.Identity import {-# SOURCE #-} Erebos.Network +import Erebos.Network.Protocol import Erebos.State -import Erebos.Storage +import Erebos.Storable +import Erebos.Storage.Head +import Erebos.UUID qualified as U + +class ( + Typeable s, Storable s, + Typeable (ServiceAttributes s), + Typeable (ServiceState s), + Typeable (ServiceGlobalState s) + ) => Service s where -class (Typeable s, Storable s, Typeable (ServiceState s), Typeable (ServiceGlobalState s)) => Service s where serviceID :: proxy s -> ServiceID serviceHandler :: Stored s -> ServiceHandler s () @@ -65,6 +72,9 @@ class (Typeable s, Storable s, Typeable (ServiceState s), Typeable (ServiceGloba serviceStorageWatchers :: proxy s -> [SomeStorageWatcher s] serviceStorageWatchers _ = [] + serviceStopServer :: proxy s -> Server -> ServiceGlobalState s -> [ ( Peer, ServiceState s ) ] -> IO () + serviceStopServer _ _ _ _ = return () + data SomeService = forall s. Service s => SomeService (Proxy s) (ServiceAttributes s) @@ -94,11 +104,10 @@ someServiceEmptyGlobalState :: SomeService -> SomeServiceGlobalState someServiceEmptyGlobalState (SomeService p _) = SomeServiceGlobalState p (emptyServiceGlobalState p) -data SomeStorageWatcher s = forall a. Eq a => SomeStorageWatcher (Stored LocalState -> a) (a -> ServiceHandler s ()) - +data SomeStorageWatcher s + = forall a. Eq a => SomeStorageWatcher (Stored LocalState -> a) (a -> ServiceHandler s ()) + | forall a. Eq a => GlobalStorageWatcher (Stored LocalState -> a) (Server -> a -> ExceptT ErebosError IO ()) -newtype ServiceID = ServiceID UUID - deriving (Eq, Ord, Show, StorableUUID) mkServiceID :: String -> ServiceID mkServiceID = maybe (error "Invalid service ID") ServiceID . U.fromString @@ -109,10 +118,13 @@ data ServiceInput s = ServiceInput , svcPeerIdentity :: UnifiedIdentity , svcServer :: Server , svcPrintOp :: String -> IO () + , svcNewStreams :: [ RawStreamReader ] } -data ServiceReply s = ServiceReply (Either s (Stored s)) Bool - | ServiceFinally (IO ()) +data ServiceReply s + = ServiceReply (Either s (Stored s)) Bool + | ServiceOpenStream (RawStreamWriter -> IO ()) + | ServiceFinally (IO ()) data ServiceHandlerState s = ServiceHandlerState { svcValue :: ServiceState s @@ -120,8 +132,8 @@ data ServiceHandlerState s = ServiceHandlerState , svcLocal :: Stored LocalState } -newtype ServiceHandler s a = ServiceHandler (ReaderT (ServiceInput s) (WriterT [ServiceReply s] (StateT (ServiceHandlerState s) (ExceptT String IO))) a) - deriving (Functor, Applicative, Monad, MonadReader (ServiceInput s), MonadWriter [ServiceReply s], MonadState (ServiceHandlerState s), MonadError String, MonadIO) +newtype ServiceHandler s a = ServiceHandler (ReaderT (ServiceInput s) (WriterT [ServiceReply s] (StateT (ServiceHandlerState s) (ExceptT ErebosError IO))) a) + deriving (Functor, Applicative, Monad, MonadReader (ServiceInput s), MonadWriter [ServiceReply s], MonadState (ServiceHandlerState s), MonadError ErebosError, MonadIO) instance MonadStorage (ServiceHandler s) where getStorage = asks $ peerStorage . svcPeer @@ -138,7 +150,7 @@ runServiceHandler h input svc global shandler = do ServiceHandler handler = shandler (runExceptT $ flip runStateT sstate $ execWriterT $ flip runReaderT input $ handler) >>= \case Left err -> do - svcPrintOp input $ "service failed: " ++ err + svcPrintOp input $ "service failed: " ++ showErebosError err return ([], (svc, global)) Right (rsp, sstate') | svcLocal sstate' == svcLocal sstate -> return (rsp, (svcValue sstate', svcGlobal sstate')) @@ -171,7 +183,7 @@ svcSetLocal :: Stored LocalState -> ServiceHandler s () svcSetLocal x = modify $ \st -> st { svcLocal = x } svcSelf :: ServiceHandler s UnifiedIdentity -svcSelf = maybe (throwError "failed to validate own identity") return . +svcSelf = maybe (throwOtherError "failed to validate own identity") return . validateExtendedIdentity . lsIdentity . fromStored =<< svcGetLocal svcPrint :: String -> ServiceHandler s () |