{-# LANGUAGE NoMonomorphismRestriction #-}
+{-# LANGUAGE DoAndIfThenElse #-}
module Main
where
import Control.Arrow ( (&&&), arr, returnA )
+import Control.Concurrent ( threadDelay )
+import Control.Exception ( SomeException, catch )
import Control.Monad ( when )
import Control.Monad.IO.Class ( MonadIO, liftIO )
-import Database.Groundhog (
- defaultMigrationLogger,
- insert,
- migrate,
- runMigration )
-import Database.Groundhog.Core ( PersistBackend, PersistEntity )
import Database.Groundhog.Generic ( runDbConn )
import Database.Groundhog.Sqlite (
withSqliteConn )
import Database.Groundhog.Postgresql (
withPostgresqlConn )
import Data.Monoid ( (<>) )
+import Network.Services.TSN.Logging ( init_logging )
import System.Console.CmdArgs ( def )
+import System.Directory ( removeFile )
import System.Exit ( exitWith, ExitCode (ExitFailure) )
import System.IO.Error ( catchIOError )
import Text.XML.HXT.Core (
ArrowXml,
IOStateArrow,
- XmlPickler,
XmlTree,
(>>>),
(/>),
getText,
hasName,
readDocument,
- runX,
- unpickleDoc,
- xpickle )
+ runX )
import Backend ( Backend(..) )
import CommandLine ( get_args )
import Configuration ( Configuration(..), merge_optional )
import ConnectionString ( ConnectionString(..) )
import ExitCodes ( exit_no_xml_files )
-import Network.Services.TSN.Logging ( init_logging )
import qualified OptionalConfiguration as OC (
OptionalConfiguration ( xml_files ),
from_rc )
import Network.Services.TSN.Report (
report_info,
report_error )
-import qualified TSN.Injuries as Injuries (
- Listing,
- Message ( listings ) )
-import qualified TSN.InjuriesDetail as InjuriesDetail (
- Listing ( player_listings ),
- Message ( listings ),
- PlayerListing )
-import qualified TSN.News as News ( Message )
+import TSN.DbImport
+import qualified TSN.XML.Injuries as Injuries ( Listing )
+import qualified TSN.XML.InjuriesDetail as InjuriesDetail ( PlayerListing )
+import qualified TSN.XML.News as News ( Message )
import Xml ( parse_opts )
--- | We put the 'Configuration' and 'XmlTree' arguments last so that
--- it's easy to eta reduce all of the import_foo functions that call
--- this.
---
-import_generic :: (XmlPickler a, MonadIO m, PersistEntity b, PersistBackend m)
- => b -- ^ Dummy Listing instance needed for 'migrate'
- -> (a -> [b]) -- ^ listings getter
- -> XmlTree
- -> m (Maybe Int) -- ^ Return the number of records inserted.
-import_generic dummy g xml = do
- -- Needs NoMonomorphismRestriction to be allowed to return
- -- different types in the two cases above.
- runMigration defaultMigrationLogger $ migrate dummy
- let root_element = unpickleDoc xpickle xml
- case root_element of
- Nothing -> do
- let msg = "Could not unpickle document in import_generic."
- liftIO $ report_error msg
- return Nothing
- Just elt -> do
- ids <- mapM insert (g elt)
- return $ Just (length ids)
-
-
-
--- | Import TSN.News from an 'XmlTree'.
-import_news :: (MonadIO m, PersistBackend m)
- => XmlTree
- -> m (Maybe Int)
-import_news = -- This implementation is wrroooonnnnngggg.
- import_generic
- (undefined :: News.Message)
- (\m -> [m] :: [News.Message]) -- Turn a Message into a [Message]
-
--- | Import TSN.Injuries from an 'XmlTree'.
-import_injuries :: (MonadIO m, PersistBackend m)
- => XmlTree
- -> m (Maybe Int)
-import_injuries =
- import_generic
- (undefined :: Injuries.Listing)
- Injuries.listings
-
--- | Import TSN.InjuriesDetail from an 'XmlTree'.
-import_injuries_detail :: (MonadIO m, PersistBackend m)
- => XmlTree
- -> m (Maybe Int)
-import_injuries_detail =
- import_generic
- (undefined :: InjuriesDetail.PlayerListing)
- ( (concatMap InjuriesDetail.player_listings) . InjuriesDetail.listings)
-
-import_file :: Configuration -> FilePath -> IO ()
-import_file cfg path = do
- results <- catchIOError
- parse_and_import
- (\e -> do
- report_error (show e)
- report_error $ "Failed to import file " ++ path ++ "."
- -- Return a nonempty list so we don't claim incorrectly that
- -- we couldn't parse the DTD.
- return [ Nothing ] )
+import_file :: Configuration -> FilePath -> IO Bool
+import_file cfg path = do
+ results <- parse_and_import `catch` exception_handler
case results of
-- If results' is empty, one of the arrows return "nothing."
- [] -> report_error $ "Unable to determine DTD for file " ++ path ++ "."
+ [] -> do
+ report_error $ "Unable to determine DTD for file " ++ path ++ "."
+ return False
(r:_) ->
case r of
- Nothing -> return ()
- Just cnt -> report_info $ "Successfully imported " ++
- (show cnt) ++
- " records from " ++ path ++ "."
+ Nothing -> return False
+ Just cnt -> do
+ report_info $ "Successfully imported " ++
+ (show cnt) ++
+ " records from " ++ path ++ "."
+ return True
where
+ exception_handler :: SomeException -> IO [Maybe Int]
+ exception_handler e = do
+ report_error (show e)
+ report_error $ "Failed to import file " ++ path ++ "."
+ -- Return a nonempty list so we don't claim incorrectly that
+ -- we couldn't parse the DTD.
+ return [Nothing]
+
-- | An arrow that reads a document into an 'XmlTree'.
readA :: IOStateArrow s a XmlTree
readA = readDocument parse_opts path
-- determine which function to call on the 'XmlTree'.
import_with_dtd :: (String, XmlTree) -> IO (Maybe Int)
import_with_dtd (dtd,xml) =
+ -- We need NoMonomorphismRestriction here.
if backend cfg == Postgres
then withPostgresqlConn cs $ runDbConn $ importer xml
else withSqliteConn cs $ runDbConn $ importer xml
cs = get_connection_string $ connection_string cfg
importer
- | dtd == "injuriesxml.dtd" = import_injuries
- | dtd == "Injuries_Detail_XML.dtd" = import_injuries_detail
- | dtd == "newsxml.dtd" = import_news
+ | dtd == "injuriesxml.dtd" =
+ dbimport (undefined :: Injuries.Listing)
+
+ | dtd == "Injuries_Detail_XML.dtd" =
+ dbimport (undefined :: InjuriesDetail.PlayerListing)
+
+ | dtd == "newsxml.dtd" =
+ dbimport (undefined :: News.Message)
+
| otherwise = \_ -> do -- Dummy arg simplifies the other cases.
let errmsg = "Unrecognized DTD in " ++ path ++ ": " ++ dtd ++ "."
liftIO $ report_info errmsg
-- We don't do this in parallel (for now?) to keep the error
-- messages nice and linear.
- mapM_ (import_file cfg) (OC.xml_files opt_config)
+ results <- mapM (import_file cfg) (OC.xml_files opt_config)
+
+ -- Zip the results with the files list to find out which ones can be
+ -- deleted.
+ let result_pairs = zip (OC.xml_files opt_config) results
+ let victims = filter (\(_,result) -> result) result_pairs
+ mapM_ ((kill True) . fst) victims
+
+ where
+ kill try_again path = do
+ removeFile path `catchIOError` exception_handler
+ report_info $ "Removed imported file " ++ path ++ "."
+ where
+ -- | A wrapper around threadDelay which takes seconds instead of
+ -- microseconds as its argument.
+ thread_sleep :: Int -> IO ()
+ thread_sleep seconds = do
+ let microseconds = seconds * (10 ^ (6 :: Int))
+ threadDelay microseconds
+
+ exception_handler :: IOError -> IO ()
+ exception_handler e = do
+ report_error (show e)
+ report_error $ "Failed to remove imported file " ++ path ++ "."
+ if try_again then do
+ report_info $ "Waiting 5 seconds to attempt removal again..."
+ thread_sleep 5
+ kill False path
+ else
+ report_info $ "Giving up on " ++ path ++ "."
projects / dead / htsn-import.git / blobdiff