mirror of
https://github.com/hasura/graphql-engine.git
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115 lines
4.6 KiB
Haskell
115 lines
4.6 KiB
Haskell
{-# LANGUAGE RecordWildCards #-}
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module Main where
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import Control.Exception
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import Data.Int (Int64)
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import Data.Text.Conversions (convertText)
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import Data.Time.Clock (getCurrentTime)
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import Data.Time.Clock.POSIX (getPOSIXTime)
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import Hasura.App
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import Hasura.Logging (Hasura, LogLevel (..), defaultEnabledEngineLogTypes)
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import Hasura.Prelude
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import Hasura.RQL.DDL.Schema
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import Hasura.RQL.Types
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import Hasura.Server.Init
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import Hasura.Server.Migrate (downgradeCatalog, dropCatalog)
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import Hasura.Server.Version
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import qualified Data.ByteString.Char8 as BC
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import qualified Data.ByteString.Lazy as BL
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import qualified Data.ByteString.Lazy.Char8 as BLC
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import qualified Data.Environment as Env
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import qualified Database.PG.Query as Q
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import qualified Hasura.Tracing as Tracing
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import qualified System.Exit as Sys
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import qualified System.Metrics as EKG
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import qualified System.Posix.Signals as Signals
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main :: IO ()
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main = do
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tryExit $ do
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args <- parseArgs
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env <- Env.getEnvironment
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runApp env args
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where
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tryExit io = try io >>= \case
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Left (ExitException _code msg) -> BC.putStrLn msg >> Sys.exitFailure
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Right r -> return r
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runApp :: Env.Environment -> HGEOptions Hasura -> IO ()
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runApp env (HGEOptionsG rci hgeCmd) = do
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initTime <- liftIO getCurrentTime
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globalCtx@GlobalCtx{..} <- initGlobalCtx rci
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withVersion $$(getVersionFromEnvironment) $ case hgeCmd of
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HCServe serveOptions -> do
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serveCtx <- initialiseServeCtx env globalCtx serveOptions
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ekgStore <- liftIO do
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s <- EKG.newStore
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EKG.registerGcMetrics s
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let getTimeMs :: IO Int64
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getTimeMs = (round . (* 1000)) `fmap` getPOSIXTime
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EKG.registerCounter "ekg.server_timestamp_ms" getTimeMs s
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pure s
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let shutdownApp = return ()
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-- Catches the SIGTERM signal and initiates a graceful shutdown.
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-- Graceful shutdown for regular HTTP requests is already implemented in
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-- Warp, and is triggered by invoking the 'closeSocket' callback.
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-- We only catch the SIGTERM signal once, that is, if the user hits CTRL-C
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-- once again, we terminate the process immediately.
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_ <- liftIO $ Signals.installHandler
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Signals.sigTERM
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(Signals.CatchOnce (shutdownGracefully $ _scShutdownLatch serveCtx))
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Nothing
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serverMetrics <- liftIO $ createServerMetrics ekgStore
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flip runPGMetadataStorageApp (_scPgPool serveCtx) $
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runHGEServer env serveOptions serveCtx Nothing initTime shutdownApp Nothing serverMetrics ekgStore
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HCExport -> do
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res <- runTxWithMinimalPool _gcConnInfo fetchMetadataFromCatalog
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either (printErrJExit MetadataExportError) printJSON res
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HCClean -> do
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res <- runTxWithMinimalPool _gcConnInfo dropCatalog
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let cleanSuccessMsg = "successfully cleaned graphql-engine related data"
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either (printErrJExit MetadataCleanError) (const $ liftIO $ putStrLn cleanSuccessMsg) res
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HCExecute -> do
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queryBs <- liftIO BL.getContents
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let sqlGenCtx = SQLGenCtx False
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pool <- mkMinimalPool _gcConnInfo
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res <- runAsAdmin pool sqlGenCtx _gcHttpManager $ do
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schemaCache <- buildRebuildableSchemaCache env
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metadata <- liftTx fetchMetadataFromCatalog
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execQuery env queryBs
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& Tracing.runTraceTWithReporter Tracing.noReporter "execute"
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& runMetadataT metadata
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& runCacheRWT schemaCache
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& fmap (\((res, _), _, _) -> res)
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either (printErrJExit ExecuteProcessError) (liftIO . BLC.putStrLn) res
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HCDowngrade opts -> do
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res <- runTxWithMinimalPool _gcConnInfo $ downgradeCatalog opts initTime
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either (printErrJExit DowngradeProcessError) (liftIO . print) res
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HCVersion -> liftIO $ putStrLn $ "Hasura GraphQL Engine: " ++ convertText currentVersion
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where
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runTxWithMinimalPool connInfo tx = do
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minimalPool <- mkMinimalPool connInfo
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liftIO $ runExceptT $ Q.runTx minimalPool (Q.ReadCommitted, Nothing) tx
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-- | Generate Postgres pool with single connection.
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-- It is useful when graphql-engine executes a transaction on database
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-- and exits in commands other than 'serve'.
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mkMinimalPool connInfo = do
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pgLogger <- _lsPgLogger <$> mkLoggers defaultEnabledEngineLogTypes LevelInfo
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let connParams = Q.defaultConnParams { Q.cpConns = 1 }
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liftIO $ Q.initPGPool connInfo connParams pgLogger
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