module Main
where
+-- System imports.
import Control.Arrow ( (&&&), (>>^), arr, returnA )
import Control.Concurrent ( threadDelay )
import Control.Exception ( SomeException, catch )
hasName,
readDocument,
runX,
- unpickleDoc,
- xpickle)
+ unpickleDoc )
+-- Local imports.
import Backend ( Backend(..) )
import CommandLine ( get_args )
import Configuration ( Configuration(..), merge_optional )
report_error )
import TSN.DbImport ( DbImport(..), ImportResult(..) )
import qualified TSN.XML.Heartbeat as Heartbeat ( verify )
-import qualified TSN.XML.Injuries as Injuries ( Message )
-import qualified TSN.XML.InjuriesDetail as InjuriesDetail ( Message )
-import qualified TSN.XML.News as News ( Message )
-import qualified TSN.XML.Odds as Odds ( Message )
+import qualified TSN.XML.Injuries as Injuries ( pickle_message )
+import qualified TSN.XML.InjuriesDetail as InjuriesDetail ( pickle_message )
+import qualified TSN.XML.News as News ( pickle_message )
+import qualified TSN.XML.Odds as Odds ( pickle_message )
import Xml ( DtdName(..), parse_opts )
-- | This is where most of the work happens. This function is called
-- on every file that we would like to import. It determines which
--- importer to use based on the DTD, processes the file, and then
--- returns whether or not any records were imported. If the file was
--- processed, the number of records imported is returned (wrapped in
--- a Just). Otherwise, if the file was not processed, 'Nothing' is
+-- importer to use based on the DTD, attempts to process the file,
+-- and then returns whether or not it was successful. If the file
+-- was processed, 'True' is returned. Otherwise, 'False' is
-- returned.
--
--- Since we are already in arrow world with HXT, the
--- 'import_with_dtd' function is lifted to an 'Arrow' as well with
--- 'arr'. This prevents us from having to do a bunch of unwrapping
--- and rewrapping with the associated error checking.
+-- The implementation is straightforward with one exception: since
+-- we are already in arrow world with HXT, the @import_with_dtd@
+-- function is lifted to an 'Arrow' as well with 'arr'. This
+-- prevents us from having to do a bunch of unwrapping and
+-- rewrapping with the associated error checking.
--
import_file :: Configuration -- ^ A configuration object needed for the
-- 'backend' and 'connection_string'.
importer
| dtd == "injuriesxml.dtd" = do
- let m = unpickleDoc xpickle xml :: Maybe Injuries.Message
+ let m = unpickleDoc Injuries.pickle_message xml
let errmsg = "Could not unpickle injuriesxml."
maybe (return $ ImportFailed errmsg) migrate_and_import m
| dtd == "Injuries_Detail_XML.dtd" = do
- let m = unpickleDoc xpickle xml :: Maybe InjuriesDetail.Message
+ let m = unpickleDoc InjuriesDetail.pickle_message xml
let errmsg = "Could not unpickle Injuries_Detail_XML."
maybe (return $ ImportFailed errmsg) migrate_and_import m
| dtd == "newsxml.dtd" = do
- let m = unpickleDoc xpickle xml :: Maybe News.Message
+ let m = unpickleDoc News.pickle_message xml
let errmsg = "Could not unpickle newsxml."
maybe (return $ ImportFailed errmsg) migrate_and_import m
| dtd == "Odds_XML.dtd" = do
- let m = unpickleDoc xpickle xml :: Maybe Odds.Message
+ let m = unpickleDoc Odds.pickle_message xml
let errmsg = "Could not unpickle Odds_XML."
maybe (return $ ImportFailed errmsg) migrate_and_import m
-- | Entry point of the program. It twiddles some knobs for
--- configuration options and then calls 'import_file' on each XML file
--- given on the command-line.
+-- configuration options and then calls 'import_file' on each XML
+-- file given on the command-line.
--
--- Any file successfully processed is then removed, and we're done.
+-- Any file successfully processed is then optionally removed, and
+-- we're done.
--
main :: IO ()
main = do
let victims = [ p | (p, True) <- result_pairs ]
let imported_count = length victims
report_info $ "Imported " ++ (show imported_count) ++ " document(s) total."
- mapM_ (kill True) victims
+ when (remove cfg) $ mapM_ (kill True) victims
where
-- | Wrap these two actions into one function so that we don't