Future on Elixir (elixir-lang) – ExFuture

• https://github.com/parroty/exfuture

As part of some more trials on future, I’ve uploaded the above ExFuture module on the GitHub. The grammer is still immature, but trying to simplify it using macros. Internally, it uses spawn/receive process to asynchronously executing the specified code blocks or functions.

Basically, I’m trying to learn around the nice feature set of Scala/Akka.

Functional Patterns for the Asynchronous Web

The above introduction video talks about the usage of futures on scala, with an example of asynchronously hitting multiple external APIs. There’re various functional-style methods on futures, and nicely structured with Scala’s DSL framework. The above ExFuture, is just a trial to implement the similar type of functionalities.

	defmodule ExFuture.HelperTest do
	use ExUnit.Case
	use ExFuture
	test "future block" do
	f = future do
	3 * 3
	end
	assert 9 == value(f)
	end
	test "parallel map with future/value macro using collection" do
	v = [1, 2, 3]
	|> Enum.map(future(&(&1 * 2)))
	|> Enum.map(&(value(&1)))
	assert v == [2, 4, 6]
	end
	test "map on future for async chaining" do
	i = 1
	f1 = future(i * 2)
	f2 = map(f1, &(&1 * 3))
	f3 = map(f2, &(&1 * 4))
	assert 24 == value(f3)
	end
	end

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