SmartGlobal

SmartGlobal allows you to use a beam module as read-only store. Such module can be generated at the application startup and send to other nodes to load. Doesn't support updates, but the module can be regenerated with different bindings. Supports _ wildcard to return the default value. In the body of - besides returning of a value - allows passing argument (or constant) to function call

Example:

SmartGlobal.new(

  XXX,

  %{
    fun1: [{[:a, :b, :c], :three_little_piggies},
           {[:xx, :yy], [1,2,3,5]},
           {[:cc, 123], <<1,2,3,4,5>>},
           {[:_], :default}],

    fun2: %{a: 100,
            b: 200,
            _: :yaya},

    fun3: [{[{:var, :x}], {:"$call", String.Chars, :to_string, [{:var, :x}]}}]
   }
  )

will generate a module which when decompied to Elixir would look like:

defmodule XXX do
  def fun1(:a, :b, :c), do: :three_little_piggies

  def fun1(:xx, :yy), do: [1,2,3,5]
  def fun1(:cc, 123), do: <<1,2,3,4,5>>

  def fun1(_), do: :default

  def fun2(:a), do: 100
  def fun2(:b), do: 200
  def fun2(_), do: :yaya

  def fun3(x), do: String.Chars.to_string(x)
end

Installation

If available in Hex, the package can be installed by adding smart_global to your list of dependencies in mix.exs:

def deps do
  [
    {:smart_global, "~> 0.1.0"}
  ]
end

Documentation can be generated with ExDoc and published on HexDocs. Once published, the docs can be found at https://hexdocs.pm/smart_global.