THRIFT-560. haskell: Add tutorial
git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@898015 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/tutorial/hs/HaskellServer.hs b/tutorial/hs/HaskellServer.hs
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+++ b/tutorial/hs/HaskellServer.hs
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+--
+-- Licensed to the Apache Software Foundation (ASF) under one
+-- or more contributor license agreements. See the NOTICE file
+-- distributed with this work for additional information
+-- regarding copyright ownership. The ASF licenses this file
+-- to you under the Apache License, Version 2.0 (the
+-- "License"); you may not use this file except in compliance
+-- with the License. You may obtain a copy of the License at
+--
+-- http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing,
+-- software distributed under the License is distributed on an
+-- "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+-- KIND, either express or implied. See the License for the
+-- specific language governing permissions and limitations
+-- under the License.
+--
+
+import qualified Calculator
+import Calculator_Iface
+import Tutorial_Types
+import SharedService_Iface
+import Shared_Types
+
+import Thrift
+import Thrift.Protocol.Binary
+import Thrift.Transport
+import Thrift.Server
+
+import Data.Maybe
+import Text.Printf
+import Control.Exception (throw)
+import Control.Concurrent.MVar
+import qualified Data.Map as M
+import Data.Map ((!))
+import Data.Monoid
+
+data CalculatorHandler = CalculatorHandler {mathLog :: MVar (M.Map Int SharedStruct)}
+
+newCalculatorHandler = do
+ log <- newMVar mempty
+ return $ CalculatorHandler log
+
+instance SharedService_Iface CalculatorHandler where
+ getStruct self k = do
+ myLog <- readMVar (mathLog self)
+ return $ (myLog ! (fromJust k))
+
+
+instance Calculator_Iface CalculatorHandler where
+ ping _ =
+ print "ping()"
+
+ add _ n1 n2 = do
+ printf "add(%d,%d)\n" (fromJust n1) (fromJust n2)
+ return ((fromJust n1)+(fromJust n2))
+
+ calculate self mlogid mwork = do
+ printf "calculate(%d, %s)\n" logid (show work)
+
+ let val = case op work of
+ ADD ->
+ num1 work + num2 work
+ SUBTRACT ->
+ num1 work - num2 work
+ MULTIPLY ->
+ num1 work * num2 work
+ DIVIDE ->
+ if num2 work == 0 then
+ throw $
+ InvalidOperation {
+ f_InvalidOperation_what = Just $ fromEnum $ op work,
+ f_InvalidOperation_why = Just "Cannot divide by 0"
+ }
+ else
+ num1 work `div` num2 work
+
+ let logEntry = SharedStruct (Just logid) (Just (show val))
+ modifyMVar_ (mathLog self) $ return .(M.insert logid logEntry)
+
+ return val
+
+ where
+ -- stupid dynamic languages f'ing it up
+ num1 = fromJust . f_Work_num1
+ num2 = fromJust . f_Work_num2
+ op = fromJust . f_Work_op
+ logid = fromJust mlogid
+ work = fromJust mwork
+
+
+ --return val
+
+ zip _ =
+ print "zip()"
+
+main = do
+ handler <- newCalculatorHandler
+ print "Starting the server..."
+ runBasicServer handler Calculator.process 9090
+ print "done."