Daniel Cook wrote:
b) Wrap the Java library with some code to use a lightweight message
queue (zeromq) to send messages to my Haskell program? (This would
require essentially re-implementing an abstracted subset of the the
protocol into 0MQ messages)
A simpler solution might be Facebook's thrift [1] (now an Apache
project). You write a simple file in a C-inspired IDL which gives
typedefs and RPC signatures, and not only do you get the data structures
and serialization functions in a number of target languages including
Haskell and Java, but you get lightweight, relatively robust, server and
client implementations. The implementations of the Java functions can
then be written in Scala or Clojure, so you avoid having to leave
fp-land entirely. One could even run the Java binary directly from
Haskell using System.Process and friends, and rather than communicating
over ports, communicate over pipes. In any case, I've had good luck with
this approach.
Cheers,
Sterl.
[1] http://incubator.apache.org/thrift/
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