smp server: update message counts during message expiration, increase idle interval

simplexmq.cabal

@@ -1,7 +1,7 @@
 cabal-version: 1.12
 
 name:           simplexmq
-version:        6.2.0.2
+version:        6.2.0.3
 synopsis:       SimpleXMQ message broker
 description:    This package includes <./docs/Simplex-Messaging-Server.html server>,
                 <./docs/Simplex-Messaging-Client.html client> and

src/Simplex/Messaging/Server.hs

@@ -163,11 +163,11 @@
 smpServer started cfg@ServerConfig {transports, transportConfig = tCfg} attachHTTP_ = do
   s <- asks server
   pa <- asks proxyAgent
-  msgStats <- processServerMessages
+  msgStats_ <- processServerMessages
   ntfStats <- restoreServerNtfs
-  liftIO $ printMessageStats "messages" msgStats
+  liftIO $ mapM_ (printMessageStats "messages") msgStats_
   liftIO $ printMessageStats "notifications" ntfStats
-  restoreServerStats msgStats ntfStats
+  restoreServerStats msgStats_ ntfStats
   raceAny_
     ( serverThread s "server subscribedQ" subscribedQ subscribers subClients pendingSubEvents subscriptions cancelSub
         : serverThread s "server ntfSubscribedQ" ntfSubscribedQ Env.notifiers ntfSubClients pendingNtfSubEvents ntfSubscriptions (\_ -> pure ())
@@ -385,12 +385,15 @@
         threadDelay' interval
         old <- expireBeforeEpoch expCfg
         now <- systemSeconds <$> getSystemTime
-        Sum deleted <- withActiveMsgQueues ms $ expireQueueMsgs now ms old
-        atomicModifyIORef'_ (msgExpired stats) (+ deleted)
-        logInfo $ "STORE: expireMessagesThread, expired " <> tshow deleted <> " messages"
+        msgStats@MessageStats {storedMsgsCount = stored, expiredMsgsCount = expired} <-
+          withActiveMsgQueues ms $ expireQueueMsgs now ms old
+        atomicWriteIORef (msgCount stats) stored
+        atomicModifyIORef'_ (msgExpired stats) (+ expired)
+        printMessageStats "STORE: messages" msgStats
       where
-        expireQueueMsgs now ms old rId q =
-          either (const 0) Sum <$> runExceptT (idleDeleteExpiredMsgs now ms rId q old)
+        expireQueueMsgs now ms old rId q = fmap (fromRight newMessageStats) . runExceptT $ do
+          (expired_, stored) <- idleDeleteExpiredMsgs now ms rId q old
+          pure MessageStats {storedMsgsCount = stored, expiredMsgsCount = fromMaybe 0 expired_, storedQueues = 1}
 
     expireNtfsThread :: ServerConfig -> M ()
     expireNtfsThread ServerConfig {notificationExpiration = expCfg} = do
@@ -1042,7 +1045,7 @@
 
 -- These dummy keys are used with `dummyVerify` function to mitigate timing attacks
 -- by having the same time of the response whether a queue exists or nor, for all valid key/signature sizes
 dummySignKey :: C.SignatureAlgorithm a => C.SAlgorithm a -> C.PublicKey a
 dummySignKey = \case
   C.SEd25519 -> dummyKeyEd25519
   C.SEd448 -> dummyKeyEd448
@@ -1731,26 +1734,26 @@
           exitFailure
     encodeMessages rId = mconcat . map (\msg -> BLD.byteString (strEncode $ MLRv3 rId msg) <> BLD.char8 '\n')
 
-processServerMessages :: M MessageStats
+processServerMessages :: M (Maybe MessageStats)
 processServerMessages = do
   old_ <- asks (messageExpiration . config) $>>= (liftIO . fmap Just . expireBeforeEpoch)
   expire <- asks $ expireMessagesOnStart . config
   asks msgStore >>= liftIO . processMessages old_ expire
     where
-      processMessages :: Maybe Int64 -> Bool -> AMsgStore -> IO MessageStats
+      processMessages :: Maybe Int64 -> Bool -> AMsgStore -> IO (Maybe MessageStats)
       processMessages old_ expire = \case
         AMS SMSMemory ms@STMMsgStore {storeConfig = STMStoreConfig {storePath}} -> case storePath of
-          Just f -> ifM (doesFileExist f) (importMessages False ms f old_) (pure newMessageStats)
-          Nothing -> pure newMessageStats
+          Just f -> ifM (doesFileExist f) (Just <$> importMessages False ms f old_) (pure Nothing)
+          Nothing -> pure Nothing
         AMS SMSJournal ms
-          | expire -> case old_ of
+          | expire -> Just <$> case old_ of
               Just old -> do
                 logInfo "expiring journal store messages..."
                 withAllMsgQueues False ms $ processExpireQueue old
               Nothing -> do
                 logInfo "validating journal store messages..."
                 withAllMsgQueues False ms $ processValidateQueue
-          | otherwise -> logWarn "skipping message expiration" $> newMessageStats
+          | otherwise -> logWarn "skipping message expiration" $> Nothing
           where
             processExpireQueue old rId q =
               runExceptT expireQueue >>= \case
@@ -1887,8 +1890,8 @@
       B.writeFile f $ strEncode stats
       logInfo "server stats saved"
 
-restoreServerStats :: MessageStats -> MessageStats -> M ()
-restoreServerStats msgStats ntfStats = asks (serverStatsBackupFile . config) >>= mapM_ restoreStats
+restoreServerStats :: Maybe MessageStats -> MessageStats -> M ()
+restoreServerStats msgStats_ ntfStats = asks (serverStatsBackupFile . config) >>= mapM_ restoreStats
   where
     restoreStats f = whenM (doesFileExist f) $ do
       logInfo $ "restoring server stats from file " <> T.pack f
@@ -1897,9 +1900,11 @@
           s <- asks serverStats
           AMS _ st <- asks msgStore
           _qCount <- M.size <$> readTVarIO (activeMsgQueues st)
-          let _msgCount = storedMsgsCount msgStats
+          let _msgCount = maybe statsMsgCount storedMsgsCount msgStats_
               _ntfCount = storedMsgsCount ntfStats
-          liftIO $ setServerStats s d {_qCount, _msgCount, _ntfCount, _msgExpired = _msgExpired d + expiredMsgsCount msgStats, _msgNtfExpired = _msgNtfExpired d + expiredMsgsCount ntfStats}
+              _msgExpired' = _msgExpired d + maybe 0 expiredMsgsCount msgStats_
+              _msgNtfExpired' = _msgNtfExpired d + expiredMsgsCount ntfStats
+          liftIO $ setServerStats s d {_qCount, _msgCount, _ntfCount, _msgExpired = _msgExpired', _msgNtfExpired = _msgNtfExpired'}
           renameFile f $ f <> ".bak"
           logInfo "server stats restored"
           compareCounts "Queue" statsQCount _qCount

src/Simplex/Messaging/Server/Env/STM.hs

@@ -80,6 +80,8 @@ data ServerConfig = ServerConfig
     -- | time after which the messages can be removed from the queues and check interval, seconds
     messageExpiration :: Maybe ExpirationConfig,
     expireMessagesOnStart :: Bool,
+    -- | interval of inactivity after which journal queue is closed
+    idleQueueInterval :: Int64,
     -- | notification expiration interval (seconds)
     notificationExpiration :: ExpirationConfig,
     -- | time after which the socket with inactive client can be disconnected (without any messages or commands, incl. PING),
@@ -121,9 +123,12 @@ defaultMessageExpiration :: ExpirationConfig
 defaultMessageExpiration =
   ExpirationConfig
     { ttl = defMsgExpirationDays * 86400, -- seconds
-      checkInterval = 21600 -- seconds, 6 hours
+      checkInterval = 14400 -- seconds, 4 hours
     }
 
+defaultIdleQueueInterval :: Int64
+defaultIdleQueueInterval = 28800 -- seconds, 8 hours
+
 defNtfExpirationHours :: Int64
 defNtfExpirationHours = 24
 
@@ -283,15 +288,14 @@ newProhibitedSub = do
   return Sub {subThread = ProhibitSub, delivered}
 
 newEnv :: ServerConfig -> IO Env
-newEnv config@ServerConfig {smpCredentials, httpCredentials, storeLogFile, msgStoreType, storeMsgsFile, smpAgentCfg, information, messageExpiration, msgQueueQuota, maxJournalMsgCount, maxJournalStateLines} = do
+newEnv config@ServerConfig {smpCredentials, httpCredentials, storeLogFile, msgStoreType, storeMsgsFile, smpAgentCfg, information, messageExpiration, idleQueueInterval, msgQueueQuota, maxJournalMsgCount, maxJournalStateLines} = do
   serverActive <- newTVarIO True
   server <- newServer
   msgStore@(AMS _ store) <- case msgStoreType of
     AMSType SMSMemory -> AMS SMSMemory <$> newMsgStore STMStoreConfig {storePath = storeMsgsFile, quota = msgQueueQuota}
     AMSType SMSJournal -> case storeMsgsFile of
       Just storePath -> 
-        let idleInterval = maybe maxBound checkInterval messageExpiration
-            cfg = JournalStoreConfig {storePath, quota = msgQueueQuota, pathParts = journalMsgStoreDepth, maxMsgCount = maxJournalMsgCount, maxStateLines = maxJournalStateLines, stateTailSize = defaultStateTailSize, idleInterval}
+        let cfg = JournalStoreConfig {storePath, quota = msgQueueQuota, pathParts = journalMsgStoreDepth, maxMsgCount = maxJournalMsgCount, maxStateLines = maxJournalStateLines, stateTailSize = defaultStateTailSize, idleInterval = idleQueueInterval}
          in AMS SMSJournal <$> newMsgStore cfg
       Nothing -> putStrLn "Error: journal msg store require path in [STORE_LOG], restore_messages" >> exitFailure
   ntfStore <- NtfStore <$> TM.emptyIO

src/Simplex/Messaging/Server/Main.hs

@@ -9,7 +9,7 @@
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE StrictData #-}
 {-# LANGUAGE TypeApplications #-}
 {-# OPTIONS_GHC -fno-warn-ambiguous-fields #-}
 
 module Simplex.Messaging.Server.Main where
 
@@ -416,6 +416,7 @@
                     { ttl = 86400 * readIniDefault defMsgExpirationDays "STORE_LOG" "expire_messages_days" ini
                     },
               expireMessagesOnStart = fromMaybe True $ iniOnOff "STORE_LOG" "expire_messages_on_start" ini,
+              idleQueueInterval = defaultIdleQueueInterval,
               notificationExpiration =
                 defaultNtfExpiration
                   { ttl = 3600 * readIniDefault defNtfExpirationHours "STORE_LOG" "expire_ntfs_hours" ini

src/Simplex/Messaging/Server/MsgStore/Journal.hs

@@ -332,20 +332,21 @@ instance MsgStoreClass JournalMsgStore where
             journalId <- newJournalId random
             mkJournalQueue queue (newMsgQueueState journalId) Nothing
 
-  withIdleMsgQueue :: Int64 -> JournalMsgStore -> RecipientId -> JournalQueue -> (JournalMsgQueue -> StoreIO a) -> StoreIO (Maybe a)
+  withIdleMsgQueue :: Int64 -> JournalMsgStore -> RecipientId -> JournalQueue -> (JournalMsgQueue -> StoreIO a) -> StoreIO (Maybe a, Int)
   withIdleMsgQueue now ms@JournalMsgStore {config} rId q action =
     StoreIO $ readTVarIO (msgQueue_ q) >>= \case
       Nothing ->
-        Just <$>
-          E.bracket
-            (unStoreIO $ getMsgQueue ms rId q)
-            (\_ -> closeMsgQueue q)
-            (unStoreIO . action)
+        E.bracket (unStoreIO $ getMsgQueue ms rId q) (\_ -> closeMsgQueue q) $ \mq -> unStoreIO $ do
+          r <- action mq
+          sz <- getQueueSize_ mq
+          pure (Just r, sz)
       Just mq -> do
         ts <- readTVarIO $ activeAt q
-        if now - ts >= idleInterval config
+        r <- if now - ts >= idleInterval config
           then Just <$> unStoreIO (action mq) `E.finally` closeMsgQueue q
           else pure Nothing
+        sz <- unStoreIO $ getQueueSize_ mq
+        pure (r, sz)
 
   deleteQueue :: JournalMsgStore -> RecipientId -> JournalQueue -> IO (Either ErrorType QueueRec)
   deleteQueue ms rId q =

src/Simplex/Messaging/Server/MsgStore/STM.hs

@@ -110,9 +110,13 @@ instance MsgStoreClass STMMsgStore where
         pure q
 
   -- does not create queue if it does not exist, does not delete it if it does (can't just close in-memory queue)
-  withIdleMsgQueue :: Int64 -> STMMsgStore -> RecipientId -> STMQueue -> (STMMsgQueue -> STM a) -> STM (Maybe a)
-  withIdleMsgQueue _ _ _ STMQueue {msgQueue_} action = readTVar msgQueue_ >>= mapM action
-  {-# INLINE withIdleMsgQueue #-}
+  withIdleMsgQueue :: Int64 -> STMMsgStore -> RecipientId -> STMQueue -> (STMMsgQueue -> STM a) -> STM (Maybe a, Int)
+  withIdleMsgQueue _ _ _ STMQueue {msgQueue_} action = readTVar msgQueue_ >>= \case
+    Just q -> do
+      r <- action q
+      sz <- getQueueSize_ q
+      pure (Just r, sz)
+    Nothing -> pure (Nothing, 0)
 
   deleteQueue :: STMMsgStore -> RecipientId -> STMQueue -> IO (Either ErrorType QueueRec)
   deleteQueue ms rId q = fst <$$> deleteQueue' ms rId q

src/Simplex/Messaging/Server/MsgStore/Types.hs

@@ -15,7 +15,6 @@ import Control.Monad (foldM)
 import Control.Monad.Trans.Except
 import Data.Int (Int64)
 import Data.Kind
-import Data.Maybe (fromMaybe)
 import qualified Data.Map.Strict as M
 import Data.Time.Clock.System (SystemTime (systemSeconds))
 import Simplex.Messaging.Protocol
@@ -47,7 +46,7 @@ class Monad (StoreMonad s) => MsgStoreClass s where
   queueRec' :: StoreQueue s -> TVar (Maybe QueueRec)
   getMsgQueue :: s -> RecipientId -> StoreQueue s -> StoreMonad s (MsgQueue s)
   -- the journal queue will be closed after action if it was initially closed or idle longer than interval in config
-  withIdleMsgQueue :: Int64 -> s -> RecipientId -> StoreQueue s -> (MsgQueue s -> StoreMonad s a) -> StoreMonad s (Maybe a)
+  withIdleMsgQueue :: Int64 -> s -> RecipientId -> StoreQueue s -> (MsgQueue s -> StoreMonad s a) -> StoreMonad s (Maybe a, Int)
   deleteQueue :: s -> RecipientId -> StoreQueue s -> IO (Either ErrorType QueueRec)
   deleteQueueSize :: s -> RecipientId -> StoreQueue s -> IO (Either ErrorType (QueueRec, Int))
   getQueueMessages_ :: Bool -> MsgQueue s -> StoreMonad s [Message]
@@ -114,10 +113,11 @@ deleteExpiredMsgs st rId q old =
     getMsgQueue st rId q >>= deleteExpireMsgs_ old q
 
 -- closed and idle queues will be closed after expiration
-idleDeleteExpiredMsgs :: MsgStoreClass s => Int64 -> s -> RecipientId -> StoreQueue s -> Int64 -> ExceptT ErrorType IO Int
+-- returns (expired count, queue size after expiration)
+idleDeleteExpiredMsgs :: MsgStoreClass s => Int64 -> s -> RecipientId -> StoreQueue s -> Int64 -> ExceptT ErrorType IO (Maybe Int, Int)
 idleDeleteExpiredMsgs now st rId q old =
-  isolateQueue rId q "idleDeleteExpiredMsgs" $ 
-    fromMaybe 0 <$> withIdleMsgQueue now st rId q (deleteExpireMsgs_ old q)
+  isolateQueue rId q "idleDeleteExpiredMsgs" $
+    withIdleMsgQueue now st rId q (deleteExpireMsgs_ old q)
 
 deleteExpireMsgs_ :: MsgStoreClass s => Int64 -> StoreQueue s -> MsgQueue s -> StoreMonad s Int
 deleteExpireMsgs_ old q mq = do

tests/SMPClient.hs

@@ -133,6 +133,7 @@ cfgMS msType =
       controlPortAdminAuth = Nothing,
       messageExpiration = Just defaultMessageExpiration,
       expireMessagesOnStart = True,
+      idleQueueInterval = defaultIdleQueueInterval,
       notificationExpiration = defaultNtfExpiration,
       inactiveClientExpiration = Just defaultInactiveClientExpiration,
       logStatsInterval = Nothing,

tests/ServerTests.hs

@@ -972,7 +972,7 @@ testMsgExpireOnInterval =
   xit' "should expire messages that are not received before messageTTL after expiry interval" $ \(ATransport (t :: TProxy c), msType) -> do
     g <- C.newRandom
     (sPub, sKey) <- atomically $ C.generateAuthKeyPair C.SEd25519 g
-    let cfg' = (cfgMS msType) {messageExpiration = Just ExpirationConfig {ttl = 1, checkInterval = 1}}
+    let cfg' = (cfgMS msType) {messageExpiration = Just ExpirationConfig {ttl = 1, checkInterval = 1}, idleQueueInterval = 1}
     withSmpServerConfigOn (ATransport t) cfg' testPort $ \_ ->
       testSMPClient @c $ \sh -> do
         (sId, rId, rKey, _) <- testSMPClient @c $ \rh -> createAndSecureQueue rh sPub