graphql-engine/server/src-lib/Hasura/Eventing/Common.hs
Samir Talwar 342391f39d Upgrade Ormolu to v0.5.
This upgrades the version of Ormolu required by the HGE repository to v0.5.0.1, and reformats all code accordingly.

Ormolu v0.5 reformats code that uses infix operators. This is mostly useful, adding newlines and indentation to make it clear which operators are applied first, but in some cases, it's unpleasant. To make this easier on the eyes, I had to do the following:

* Add a few fixity declarations (search for `infix`)
* Add parentheses to make precedence clear, allowing Ormolu to keep everything on one line
* Rename `relevantEq` to `(==~)` in #6651 and set it to `infix 4`
* Add a few _.ormolu_ files (thanks to @hallettj for helping me get started), mostly for Autodocodec operators that don't have explicit fixity declarations

In general, I think these changes are quite reasonable. They mostly affect indentation.

PR-URL: https://github.com/hasura/graphql-engine-mono/pull/6675
GitOrigin-RevId: cd47d87f1d089fb0bc9dcbbe7798dbceedcd7d83
2022-11-02 20:55:13 +00:00

91 lines
3.8 KiB
Haskell

module Hasura.Eventing.Common
( LockedEventsCtx (..),
saveLockedEvents,
removeEventFromLockedEvents,
generateScheduleTimes,
cleanupSchedulesToBeGenerated,
deleteEventTriggerLogsInBatchesWith,
)
where
import Control.Arrow.Extended
import Control.Concurrent.STM.TVar
import Control.Monad.STM
import Data.List (unfoldr)
import Data.Set qualified as Set
import Data.Time
import Hasura.Base.Error (QErr)
import Hasura.Prelude
import Hasura.RQL.Types.Action (LockedActionEventId)
import Hasura.RQL.Types.Common
import Hasura.RQL.Types.EventTrigger
import Hasura.RQL.Types.Eventing (EventId)
import Hasura.RQL.Types.ScheduledTrigger (CronEventId, OneOffScheduledEventId)
import System.Cron
data LockedEventsCtx = LockedEventsCtx
{ leCronEvents :: TVar (Set.Set CronEventId),
leOneOffEvents :: TVar (Set.Set OneOffScheduledEventId),
leEvents :: TVar (HashMap SourceName (Set.Set EventId)),
leActionEvents :: TVar (Set.Set LockedActionEventId)
}
-- | After the events are fetched from the DB, we store the locked events
-- in a hash set(order doesn't matter and look ups are faster) in the
-- event engine context
saveLockedEvents :: (MonadIO m) => [EventId] -> TVar (Set.Set EventId) -> m ()
saveLockedEvents eventIds lockedEvents =
liftIO $
atomically $ do
lockedEventsVals <- readTVar lockedEvents
writeTVar lockedEvents $!
Set.union lockedEventsVals $
Set.fromList eventIds
-- | Remove an event from the 'LockedEventsCtx' after it has been processed
removeEventFromLockedEvents ::
MonadIO m => EventId -> TVar (Set.Set EventId) -> m ()
removeEventFromLockedEvents eventId lockedEvents =
liftIO $
atomically $ do
lockedEventsVals <- readTVar lockedEvents
writeTVar lockedEvents $! Set.delete eventId lockedEventsVals
-- | Generates next @n events starting @from according to 'CronSchedule'
generateScheduleTimes :: UTCTime -> Int -> CronSchedule -> [UTCTime]
generateScheduleTimes from n cron = take n $ go from
where
go = unfoldr (fmap dup . nextMatch cron)
-- | number of cleanup schedules to be generated in one iteration
cleanupSchedulesToBeGenerated :: Int
cleanupSchedulesToBeGenerated = 50
deleteEventTriggerLogsInBatchesWith ::
(MonadIO m, MonadError QErr m) =>
IO (Maybe (TriggerLogCleanupConfig, EventTriggerCleanupStatus)) ->
TriggerLogCleanupConfig ->
(TriggerLogCleanupConfig -> IO (Either QErr DeletedEventLogStats)) ->
m DeletedEventLogStats
deleteEventTriggerLogsInBatchesWith getLatestCleanupConfig oldCleanupConfig dbLogDeleteAction = do
-- fetch the latest cleanup config from the schema cache
latestCleanupConfig <- liftIO getLatestCleanupConfig
case latestCleanupConfig of
-- if the cleanup has been paused, then don't delete anything
Just (_, ETCSPaused) -> pure (DeletedEventLogStats 0 0)
nonPausedNewConfig -> do
-- get latest cleanup config if available, else use the older one
let cleanupConfig = maybe oldCleanupConfig fst nonPausedNewConfig
-- delete one batch of the logs
deletedStatsForCurrentBatch@(DeletedEventLogStats delEventLogsInBatch delInvocationLogsInBatch) <-
liftEitherM $ liftIO $ dbLogDeleteAction cleanupConfig
-- If no logs has been deleted, then end the recursion
if deletedStatsForCurrentBatch == (DeletedEventLogStats 0 0)
then pure deletedStatsForCurrentBatch
else do
-- if non zero logs has been deleted then do a recursion
(DeletedEventLogStats deletedRemainingEventLogs deletedRemainingInvocationLogs) <-
deleteEventTriggerLogsInBatchesWith getLatestCleanupConfig cleanupConfig dbLogDeleteAction
-- Finally collect all the statistics
pure (DeletedEventLogStats (delEventLogsInBatch + deletedRemainingEventLogs) (delInvocationLogsInBatch + deletedRemainingInvocationLogs))