where
import Control.Arrow.ArrowIO
-import Control.Concurrent
import Control.Concurrent.STM
-import Control.Exception
import Control.Monad
import Control.Monad.Trans
import Data.Maybe
-import Data.Set (Set)
-import qualified Data.Set as S
-import Network.URI
import Rakka.Page
-import Rakka.Storage.DefaultPage
+import Rakka.Storage.Impl
+import Rakka.Storage.Types
import Subversion.Types
-import System.Directory
-import System.FilePath
import System.IO
-import System.Log.Logger
-import System.Posix.Files
-import System.Posix.Types
-import System.Posix.IO
-import Subversion.FileSystem
import Subversion.Repository
import Text.HyperEstraier hiding (WriteLock)
logger = "Rakka.Storage"
-data Storage
- = Storage {
- stoRepository :: !Repository
- , stoIndexChan :: !(TChan IndexReq)
- }
-
-
-data IndexReq
- = SyncIndex
- | SearchIndex !Condition !(TMVar [(PageName, RevNum)])
-
-
mkStorage :: FilePath -> Repository -> (Page -> IO Document) -> IO Storage
mkStorage lsdir repos mkDraft
= do chan <- startIndexManager lsdir repos mkDraft
getPage = ((liftIO .) .) . getPage' . stoRepository
-getPage' :: Repository -> PageName -> Maybe RevNum -> IO (Maybe Page)
-getPage' repos name rev
- = loadDefaultPage name -- FIXME
-
-
putPage :: MonadIO m => Storage -> Page -> RevNum -> m ()
putPage sto page oldRev
= error "FIXME: not implemented"
syncIndex sto
= atomically $ writeTChan (stoIndexChan sto) SyncIndex
-
-findAllPages :: Repository -> RevNum -> IO (Set PageName)
-findAllPages _ 0 = findAllDefaultPages
-findAllPages repos rev
- = findAllDefaultPages -- FIXME
-
-
-findChangedPages :: Repository -> RevNum -> RevNum -> IO (Set PageName)
-findChangedPages repos 0 newRev = findAllPages repos newRev
-findChangedPages repos oldRev newRev
- = fail "FIXME: not impl"
-
-
-getCurrentRevNum :: Repository -> IO RevNum
-getCurrentRevNum repos
- = getRepositoryFS repos >>= getYoungestRev
-
-
-startIndexManager :: FilePath -> Repository -> (Page -> IO Document) -> IO (TChan IndexReq)
-startIndexManager lsdir repos mkDraft
- = do chan <- newTChanIO
- index <- openIndex indexDir revFile
- forkIO (loop chan index)
- return chan
- where
- indexDir = lsdir </> "index"
- revFile = lsdir </> "indexRev"
-
- loop :: TChan IndexReq -> Database -> IO ()
- loop chan index
- = do req <- atomically $ readTChan chan
- case req of
- SyncIndex
- -> syncIndex' index revFile repos mkDraft
- SearchIndex cond var
- -> do result <- searchIndex index cond
- atomically $ putTMVar var result
- loop chan index
-
-
--- casket を R/W モードで開く。成功したらそのまま返し、失敗したら
--- indexDir と revFile を削除してから casket を R/W モードで開く。
-openIndex :: FilePath -> FilePath -> IO Database
-openIndex indexDir revFile
- = do ret <- openDatabase indexDir (Writer [])
- case ret of
- Right index
- -> do debugM logger ("Opened an H.E. index on " ++ indexDir)
- return index
-
- Left err
- -> do warningM logger ("Failed to open an H.E. index on "
- ++ indexDir ++ ": " ++ show err)
-
- indexExists <- doesDirectoryExist indexDir
- when indexExists
- $ removeDirectoryRecursive indexDir
-
- revFileExists <- doesFileExist revFile
- when revFileExists
- $ removeFile revFile
-
- Right index <- openDatabase indexDir (Writer [Create []])
- addAttrIndex index "@uri" SeqIndex
- addAttrIndex index "rakka:revision" SeqIndex
- noticeM logger ("Created an H.E. index on " ++ indexDir)
-
- return index
-
-
-syncIndex' :: Database -> FilePath -> Repository -> (Page -> IO Document) -> IO ()
-syncIndex' index revFile repos mkDraft
- = updateIndexRev revFile $ \ oldRev ->
- do debugM logger ("The index revision is currently " ++ show oldRev)
-
- newRev <- getCurrentRevNum repos
- debugM logger ("The repository revision is currently " ++ show newRev)
-
- when (newRev /= oldRev) (syncIndex'' oldRev newRev)
- return newRev
- where
- syncIndex'' :: RevNum -> RevNum -> IO ()
- syncIndex'' oldRev newRev
- = do pages <- findChangedPages repos oldRev newRev
- mapM_ (updateIndex index repos mkDraft newRev) (S.toList pages)
-
-
-searchIndex :: Database -> Condition -> IO [(PageName, RevNum)]
-searchIndex index cond
- = searchDatabase index cond >>= mapM fromId
- where
- fromId :: DocumentID -> IO (PageName, RevNum)
- fromId docId
- = do uri <- getDocURI index docId
- rev <- getDocAttr index docId "rakka:revision"
- >>= return . read . fromJust
- return (decodePageName $ uriPath uri, rev)
-
-
-updateIndex :: Database
- -> Repository
- -> (Page -> IO Document)
- -> RevNum
- -> PageName
- -> IO ()
-updateIndex index repos mkDraft rev name
- = do pageM <- getPage' repos name (Just rev)
- case pageM of
- -- ページが削除された
- Nothing
- -> do docIdM <- getDocIdByURI index (mkRakkaURI name)
- case docIdM of
- Nothing -> return ()
- Just docId -> do removeDocument index docId [CleaningRemove]
- infoM logger ("Removed page " ++ name ++ " from the index")
- Just page
- -> do draft <- mkDraft page
- putDocument index draft [CleaningPut]
- infoM logger ("Indexed page " ++ name ++ " of revision " ++ show (pageRevision page))
-
-
-updateIndexRev :: FilePath -> (RevNum -> IO RevNum) -> IO ()
-updateIndexRev revFile f = bracket acquireLock releaseLock update
- where
- acquireLock :: IO Fd
- acquireLock
- = do fd <- openFd revFile ReadWrite (Just stdFileMode) defaultFileFlags
- waitToSetLock fd (WriteLock, AbsoluteSeek, 0, 0)
- return fd
-
- releaseLock :: Fd -> IO ()
- releaseLock fd
- = setLock fd (Unlock, AbsoluteSeek, 0, 0)
-
- update :: Fd -> IO ()
- update fd
- = do fdSeek fd AbsoluteSeek 0
- size <- return . fromIntegral . fileSize =<< getFdStatus fd
- (revStr, gotSize) <- fdRead fd size
- when (size /= gotSize) $ fail ("read " ++ show gotSize ++
- " bytes but expected " ++ show size ++ " bytes")
-
- let rev = case revStr of
- "" -> 0
- _ -> read revStr
-
- rev' <- f rev
-
- let revStr' = show rev' ++ "\n"
- size' = fromIntegral $ length revStr'
-
- fdSeek fd AbsoluteSeek 0
- setFdSize fd 0
- wroteSize <- fdWrite fd revStr'
- when (size' /= wroteSize) $ fail ("wrote " ++ show wroteSize ++
- " bytes but expected " ++ show size' ++ " bytes")
\ No newline at end of file
projects / Rakka.git / blobdiff