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Monthly Downloads: 16
Programming language: Haskell
License: BSD 3-clause "New" or "Revised" License
Tags: Data    
Latest version: v1.2.2

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README

BERT[-RPC] for Haskell

Originally written by marius a. eriksen ([email protected])

This is a BERT serializer/deserializer and BERT-RPC client and server for Haskell. BERT-RPC currently supports synchronous (call) requests.

The primitives provided are fairly elementary: for the client, call provides the capability to perform the RPC call, while the server's serve is provided with a dispatch function providing the dispatching logic for the server. Thus, one can imagine building higher level abstractions on top of these primitives.

Installation

It's a cabal package, so

$ cabal install bert

should do the trick.

BERT

import qualified Data.ByteString.Lazy.Char8 as C
import Data.BERT

Creating BERT terms is simple.

TupleTerm [BytelistTerm (C.pack "hello"), IntTerm 123]

Or by using the BERT typeclass.

showBERT $ ("hello", 123)

The BERT class can also read terms back.

Right ("hello", 123) = readBERT . showBERT $ ("hello", 123)

BERT-RPC client

import Data.BERT
import Network.BERT.Client

Create a transport to the server endpoint, and issue a (synchronous) call with it.

t <- tcpClient "localhost" 8080
r <- call t "calc" "add" ([123, 3000]::[Int])
case r of
  Right res -> print (res :: Int)
  Left _    -> putStrLn "error"

BERT-RPC server

import Data.BERT
import Network.BERT.Server

Create a transport from which to accept connections, and provide a dispatch function for incoming RPCs. The dispatch function is issued in a new thread for each incoming request.

main = do
  s <- tcpServer 8080
  serve s dispatch

dispatch "calc" "add" [IntTerm a, IntTerm b] = 
  return $ Success $ IntTerm (a + b)
dispatch "calc" _ _ =
  return NoSuchFunction
dispatch _ _ _ = 
  return NoSuchModule

Maintainers

Roman Cheplyaka is the primary maintainer.

Oleksandr Manzyuk is the backup maintainer. Please get in touch with him if the primary maintainer cannot be reached.