Implement an anonymous service.

Usage

To create the service:

• Create a module that implements the API you want. This API will be expressed as a set of public functions. Each function will be defined to accept the current state as its first parameter. If a function wants to change the state, it must end with a call to the Jeeves.Common.update_state/2 function (which will have been imported into your module automatically).

  For this example, we’ll call the module MyService.

• Add the line use Jeeves.Anonymous to the top of this module.

To consume the service:

• Create an instance of the service with MyJeeves.run(). You can pass initial state to the service as an optional parameter. This call returns a handle to this service instance.

• Call the API functions in the service, using the handle as a first parameter.

Example

defmodule Accumulator do
  using Jeeves.Anonymous, state: 0

  def current_value(acc), do: acc
  def increment(acc, by \ 1) do
    update_state(acc + by)
  end
end

with acc = Accumulator.run(10) do
  Accumulator.increment(acc, 3)      
  Accumulator.increment(acc, 2)
  Accumulator.current_value(acc)   # => 15
end

Options

You can pass a keyword list to use Jeeves.Anonymous:

• state: value

  Set the detail initial state of the service to value. This can be overridden by passing a different value to the run function.

• showcode: boolean

  If truthy, dump a representation of the generated code to STDOUT during compilation.