下面是我實現的Gearman客戶端:
{-# LANGUAGE DeriveDataTypeable #-}
import Control.Exception (Exception, IOException, catch, throwIO)
import qualified Data.ByteString.Char8 as B
import Data.Typeable (Typeable)
import qualified Network.Gearman.Client as C
import Network.Gearman.Internal (Function, GearmanClient, GearmanError, Port, withGearman)
import Network.Socket (HostName)
data ConnectException = ConnectException HostName Port IOException
deriving (Show, Typeable)
instance Exception ConnectException
main :: IO()
main = do
c <- C.connectGearman (B.pack "client-id") host port `catch` \e -> throwIO (ConnectException host port e)
either (error . B.unpack) return c
>>= submitFooJob
>>= either(error . B.unpack) (putStrLn . B.unpack)
return()
where
host = "localhost"::HostName
port = 4730::Port
submitFooJob :: GearmanClient -> IO (Either GearmanError B.ByteString)
submitFooJob gc = withGearman gc $ C.submitJob (B.pack "foo"::Function) (B.pack "bar")
我得到了一些幫助[哈斯克爾初學者郵件列表(https://mail.haskell.org/pipermail/beginners/2017-March/017435.html )。我會很快回答我自己的問題。 – palik
[這裏](https://github.com/p-alik/hgearman-client/blob/upstream/demos/submit-job.hs)是一個提交作業的例子 – palik