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Monthly Downloads: 60
Programming language: Haskell
License: BSD 3-clause "New" or "Revised" License
Tags: Control     Distributed    
Latest version: v0.4.0

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README

distributed-closure

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Leverage the -XStaticPointers extension from GHC 7.10 onwards for distributed programming using lightweight serializable closures. This package implements a serializable closure abstraction on top of static pointers. Serializable closures can be shipped around a computer cluster. This is useful for implementing intuitive and modular distributed applications. See this blog post for a hands on introduction and this paper for the original motivation.

Example

In GHC 8 and above, remoting a computation on another node using this library goes along the lines of

data NodeId

-- Assume we're given a spaw primitive.
spawn :: NodeId -> Closure (IO ()) -> IO ()

-- A computation to remote on another node.
hello :: String -> IO ()
hello name = putStrLn ("Hello, " ++ name)

main = do
  name <- getLine
  spawn "someAddress" (static hello `cap` name)

An example of sending static pointers and closures through a communication channel is provided under [examples/ClientServer.hs](examples/ClientServer.hs) in the source repository.

distributed-closure does not implement sending/receiving/spawning closures - that's left for higher-level frameworks. Only closure creation, composition and (de)serialization.