Headline

A JoCaml-based implementation that uses join patterns

Motivation

Nowadays, event handling is a standard technique in GUI programming. However, there is a lot of research going on to use such an event-based approach for concurrent programming. The idea is to parallelize the handling of events by combining simple events to more complex ones using so called join patterns. This project demonstrates the usage of concurrency by event handling in JoCaml using such join patterns.

Illustration

Join patterns combine several event channels, which all must be served in order to start the handling. If channels represent functions on an object-like strucure another channel is often used as a internal state, which is modified by the function.

 

(* join pattern for cut *) def employeeState (n, a, s) & cut () =

    employeeState (n, a, s *. 0.5)

For example the internal state employeeState (n, a, s) describes an employee with name, address and salary. If a Feature:Cut-event occurs this internal state is consumed and triggered again with a modified salary.

Architecture

  • company.ml company structure
  • company.mli header, company signature
  • meganalysis.ml sample company
  • main.ml simple test program

Usage

You need to install JJoCaml .

Use the makefile for some demo:

  • Enter make compile to compile the code
  • Enter make test to execute the script contained in main.ml and to perform a simple diff-based test

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    For you are available next options:

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