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Diffstat (limited to 'Assistant/DaemonStatus.hs')
-rw-r--r-- | Assistant/DaemonStatus.hs | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/Assistant/DaemonStatus.hs b/Assistant/DaemonStatus.hs new file mode 100644 index 000000000..7268bbbfb --- /dev/null +++ b/Assistant/DaemonStatus.hs @@ -0,0 +1,262 @@ +{- git-annex assistant daemon status + - + - Copyright 2012 Joey Hess <joey@kitenet.net> + - + - Licensed under the GNU GPL version 3 or higher. + -} + +module Assistant.DaemonStatus where + +import Assistant.Common +import Assistant.Alert.Utility +import Utility.Tmp +import Assistant.Types.NetMessager +import Utility.NotificationBroadcaster +import Logs.Transfer +import Logs.Trust +import qualified Remote +import qualified Types.Remote as Remote +import qualified Git + +import Control.Concurrent.STM +import System.Posix.Types +import Data.Time.Clock.POSIX +import Data.Time +import System.Locale +import qualified Data.Map as M +import qualified Data.Text as T + +getDaemonStatus :: Assistant DaemonStatus +getDaemonStatus = (atomically . readTMVar) <<~ daemonStatusHandle + +modifyDaemonStatus_ :: (DaemonStatus -> DaemonStatus) -> Assistant () +modifyDaemonStatus_ a = modifyDaemonStatus $ \s -> (a s, ()) + +modifyDaemonStatus :: (DaemonStatus -> (DaemonStatus, b)) -> Assistant b +modifyDaemonStatus a = do + dstatus <- getAssistant daemonStatusHandle + liftIO $ do + (s, b) <- atomically $ do + r@(s, _) <- a <$> takeTMVar dstatus + putTMVar dstatus s + return r + sendNotification $ changeNotifier s + return b + +{- Returns a function that updates the lists of syncable remotes + - and other associated information. -} +calcSyncRemotes :: Annex (DaemonStatus -> DaemonStatus) +calcSyncRemotes = do + rs <- filter (remoteAnnexSync . Remote.gitconfig) . + concat . Remote.byCost <$> Remote.remoteList + alive <- trustExclude DeadTrusted (map Remote.uuid rs) + let good r = Remote.uuid r `elem` alive + let syncable = filter good rs + let syncdata = filter (not . remoteAnnexIgnore . Remote.gitconfig) $ + filter (not . isXMPPRemote) syncable + + return $ \dstatus -> dstatus + { syncRemotes = syncable + , syncGitRemotes = filter Remote.syncableRemote syncable + , syncDataRemotes = syncdata + , syncingToCloudRemote = any iscloud syncdata + } + where + iscloud r = not (Remote.readonly r) && Remote.globallyAvailable r + +{- Updates the syncRemotes list from the list of all remotes in Annex state. -} +updateSyncRemotes :: Assistant () +updateSyncRemotes = do + modifyDaemonStatus_ =<< liftAnnex calcSyncRemotes + status <- getDaemonStatus + liftIO $ sendNotification $ syncRemotesNotifier status + + when (syncingToCloudRemote status) $ + updateAlertMap $ + M.filter $ \alert -> + alertName alert /= Just CloudRepoNeededAlert + +updateScheduleLog :: Assistant () +updateScheduleLog = + liftIO . sendNotification =<< scheduleLogNotifier <$> getDaemonStatus + +{- Load any previous daemon status file, and store it in a MVar for this + - process to use as its DaemonStatus. Also gets current transfer status. -} +startDaemonStatus :: Annex DaemonStatusHandle +startDaemonStatus = do + file <- fromRepo gitAnnexDaemonStatusFile + status <- liftIO $ + flip catchDefaultIO (readDaemonStatusFile file) =<< newDaemonStatus + transfers <- M.fromList <$> getTransfers + addsync <- calcSyncRemotes + liftIO $ atomically $ newTMVar $ addsync $ status + { scanComplete = False + , sanityCheckRunning = False + , currentTransfers = transfers + } + +{- Don't just dump out the structure, because it will change over time, + - and parts of it are not relevant. -} +writeDaemonStatusFile :: FilePath -> DaemonStatus -> IO () +writeDaemonStatusFile file status = + viaTmp writeFile file =<< serialized <$> getPOSIXTime + where + serialized now = unlines + [ "lastRunning:" ++ show now + , "scanComplete:" ++ show (scanComplete status) + , "sanityCheckRunning:" ++ show (sanityCheckRunning status) + , "lastSanityCheck:" ++ maybe "" show (lastSanityCheck status) + ] + +readDaemonStatusFile :: FilePath -> IO DaemonStatus +readDaemonStatusFile file = parse <$> newDaemonStatus <*> readFile file + where + parse status = foldr parseline status . lines + parseline line status + | key == "lastRunning" = parseval readtime $ \v -> + status { lastRunning = Just v } + | key == "scanComplete" = parseval readish $ \v -> + status { scanComplete = v } + | key == "sanityCheckRunning" = parseval readish $ \v -> + status { sanityCheckRunning = v } + | key == "lastSanityCheck" = parseval readtime $ \v -> + status { lastSanityCheck = Just v } + | otherwise = status -- unparsable line + where + (key, value) = separate (== ':') line + parseval parser a = maybe status a (parser value) + readtime s = do + d <- parseTime defaultTimeLocale "%s%Qs" s + Just $ utcTimeToPOSIXSeconds d + +{- Checks if a time stamp was made after the daemon was lastRunning. + - + - Some slop is built in; this really checks if the time stamp was made + - at least ten minutes after the daemon was lastRunning. This is to + - ensure the daemon shut down cleanly, and deal with minor clock skew. + - + - If the daemon has never ran before, this always returns False. + -} +afterLastDaemonRun :: EpochTime -> DaemonStatus -> Bool +afterLastDaemonRun timestamp status = maybe False (< t) (lastRunning status) + where + t = realToFrac (timestamp + slop) :: POSIXTime + slop = fromIntegral tenMinutes + +tenMinutes :: Int +tenMinutes = 10 * 60 + +{- Mutates the transfer map. Runs in STM so that the transfer map can + - be modified in the same transaction that modifies the transfer queue. + - Note that this does not send a notification of the change; that's left + - to the caller. -} +adjustTransfersSTM :: DaemonStatusHandle -> (TransferMap -> TransferMap) -> STM () +adjustTransfersSTM dstatus a = do + s <- takeTMVar dstatus + putTMVar dstatus $ s { currentTransfers = a (currentTransfers s) } + +{- Checks if a transfer is currently running. -} +checkRunningTransferSTM :: DaemonStatusHandle -> Transfer -> STM Bool +checkRunningTransferSTM dstatus t = M.member t . currentTransfers + <$> readTMVar dstatus + +{- Alters a transfer's info, if the transfer is in the map. -} +alterTransferInfo :: Transfer -> (TransferInfo -> TransferInfo) -> Assistant () +alterTransferInfo t a = updateTransferInfo' $ M.adjust a t + +{- Updates a transfer's info. Adds the transfer to the map if necessary, + - or if already present, updates it while preserving the old transferTid, + - transferPaused, and bytesComplete values, which are not written to disk. -} +updateTransferInfo :: Transfer -> TransferInfo -> Assistant () +updateTransferInfo t info = updateTransferInfo' $ M.insertWith' merge t info + where + merge new old = new + { transferTid = maybe (transferTid new) Just (transferTid old) + , transferPaused = transferPaused new || transferPaused old + , bytesComplete = maybe (bytesComplete new) Just (bytesComplete old) + } + +updateTransferInfo' :: (TransferMap -> TransferMap) -> Assistant () +updateTransferInfo' a = notifyTransfer `after` modifyDaemonStatus_ update + where + update s = s { currentTransfers = a (currentTransfers s) } + +{- Removes a transfer from the map, and returns its info. -} +removeTransfer :: Transfer -> Assistant (Maybe TransferInfo) +removeTransfer t = notifyTransfer `after` modifyDaemonStatus remove + where + remove s = + let (info, ts) = M.updateLookupWithKey + (\_k _v -> Nothing) + t (currentTransfers s) + in (s { currentTransfers = ts }, info) + +{- Send a notification when a transfer is changed. -} +notifyTransfer :: Assistant () +notifyTransfer = do + dstatus <- getAssistant daemonStatusHandle + liftIO $ sendNotification + =<< transferNotifier <$> atomically (readTMVar dstatus) + +{- Send a notification when alerts are changed. -} +notifyAlert :: Assistant () +notifyAlert = do + dstatus <- getAssistant daemonStatusHandle + liftIO $ sendNotification + =<< alertNotifier <$> atomically (readTMVar dstatus) + +{- Returns the alert's identifier, which can be used to remove it. -} +addAlert :: Alert -> Assistant AlertId +addAlert alert = do + notice [showAlert alert] + notifyAlert `after` modifyDaemonStatus add + where + add s = (s { lastAlertId = i, alertMap = m }, i) + where + i = nextAlertId $ lastAlertId s + m = mergeAlert i alert (alertMap s) + +removeAlert :: AlertId -> Assistant () +removeAlert i = updateAlert i (const Nothing) + +updateAlert :: AlertId -> (Alert -> Maybe Alert) -> Assistant () +updateAlert i a = updateAlertMap $ \m -> M.update a i m + +updateAlertMap :: (AlertMap -> AlertMap) -> Assistant () +updateAlertMap a = notifyAlert `after` modifyDaemonStatus_ update + where + update s = s { alertMap = a (alertMap s) } + +{- Displays an alert while performing an activity that returns True on + - success. + - + - The alert is left visible afterwards, as filler. + - Old filler is pruned, to prevent the map growing too large. -} +alertWhile :: Alert -> Assistant Bool -> Assistant Bool +alertWhile alert a = alertWhile' alert $ do + r <- a + return (r, r) + +{- Like alertWhile, but allows the activity to return a value too. -} +alertWhile' :: Alert -> Assistant (Bool, a) -> Assistant a +alertWhile' alert a = do + let alert' = alert { alertClass = Activity } + i <- addAlert alert' + (ok, r) <- a + updateAlertMap $ mergeAlert i $ makeAlertFiller ok alert' + return r + +{- Displays an alert while performing an activity, then removes it. -} +alertDuring :: Alert -> Assistant a -> Assistant a +alertDuring alert a = do + i <- addAlert $ alert { alertClass = Activity } + removeAlert i `after` a + +{- Remotes using the XMPP transport have urls like xmpp::user@host -} +isXMPPRemote :: Remote -> Bool +isXMPPRemote remote = Git.repoIsUrl r && "xmpp::" `isPrefixOf` Git.repoLocation r + where + r = Remote.repo remote + +getXMPPClientID :: Remote -> ClientID +getXMPPClientID r = T.pack $ drop (length "xmpp::") (Git.repoLocation (Remote.repo r)) |