pipeline timeout exceptions

hbs2-core/lib/HBS2/Actors.hs

@@ -12,9 +12,16 @@ import Control.Concurrent.STM
 import Control.Concurrent.STM.TBMQueue qualified as TBMQ
 import Control.Concurrent.STM.TBMQueue (TBMQueue)
 import Control.Concurrent.STM.TVar qualified as TVar
-import Data.Function
 import Data.Kind
 import Control.Concurrent
+import Control.Concurrent.Async
+import Control.Exception
+
+data PipelineExcepion =
+  PipelineAddJobTimeout
+  deriving stock (Show,Typeable)
+
+instance Exception PipelineExcepion
 
 data Pipeline m a =
   Pipeline
@@ -47,9 +54,15 @@ stopPipeline pip = liftIO $ do
       pause ( 0.01 :: Timeout 'Seconds) >> next
 
 addJob :: forall a m m1 . (MonadIO m, MonadIO m1) => Pipeline m a -> m a -> m1 ()
-addJob pip act = liftIO $ do
-  doWrite <- atomically $ TVar.readTVar ( stopAdding pip )
-  unless doWrite $ do
-    atomically $ TBMQ.writeTBMQueue (toQueue pip) act
+addJob pip' act' = liftIO $ do
+  doWrite <- atomically $ TVar.readTVar ( stopAdding pip' )
+  -- FIXME: exception-timeout-hardcode
+  race (pause @'Seconds 3) (doAddJob doWrite pip' act') >>= \case
+    Left{} -> throwIO PipelineAddJobTimeout
+    _ -> pure ()
 
+  where
+    doAddJob w pip act =
+      unless w $ do
+        atomically $ TBMQ.writeTBMQueue (toQueue pip) act
 

hbs2-core/lib/HBS2/Storage.hs

@@ -10,10 +10,17 @@ import Data.Kind
 import Lens.Micro.Platform
 import Data.ByteString.Lazy (ByteString)
 import Control.Monad.Trans.Maybe
+import Control.Exception
 import Data.Word
 
 import Codec.Serialise()
 
+data StorageException =
+  StorageAddTaskTimeout
+  deriving (Show,Typeable)
+
+instance Exception StorageException
+
 class Pretty (Hash h) => IsKey h where
   type family Key h :: Type
 

hbs2-storage-simple/lib/HBS2/Storage/Simple.hs

@@ -161,9 +161,15 @@ simpleStorageInit opts = liftIO $ do
 catchAny :: IO a -> (SomeException -> IO a) -> IO a
 catchAny = Control.Exception.catch
 
+-- FIXME: io-operation-pipeline-block
 simpleAddTask :: SimpleStorage h -> IO () -> IO ()
 simpleAddTask s task = do
-  atomically $ TBMQ.writeTBMQueue (s ^. storageOpQ) task
+  -- FIXME: add-task-timeout-hardcode
+  reallyAdded <- race (pause @'Seconds 3) do
+    atomically $ TBMQ.writeTBMQueue (s ^. storageOpQ) task
+  case reallyAdded of
+    Left{} -> throwIO StorageAddTaskTimeout
+    _ -> pure ()
 
 simpleStorageStop :: SimpleStorage h -> IO ()
 simpleStorageStop ss = do