LocationSimulator.Plug behaviour (LocationSimulator v1.0.0)

A plug transforms a pipeline. Inspired by Plug from Phoenix.

Implement init/1 to validate/transform options at compile/start time. Implement call/2 to transform the pipeline per event.

Example

defmodule MyApp.SanitizePlug do
  @behaviour LocationSimulator.Plug

  @impl true
  def init(opts), do: opts

  @impl true
  def call(pipeline, _opts) do
    Map.update!(pipeline, :config, &Map.drop(&1, [:secret_key]))
  end
end

Summary

Callbacks

call(pipeline, opts)

Called for each GPS event in the worker loop.

init(opts)

Called once when the pipeline is assembled.

Callbacks

call(pipeline, opts)

@callback call(pipeline :: map(), opts :: term()) :: map()

Called for each GPS event in the worker loop.

Receives the pipeline map (with keys :config, :state, :gps, :halted, :assigns) and the compiled opts from init/1.

Return an updated pipeline. Set halted: true to stop further plug processing for this event (and signal the worker to stop).

init(opts)

@callback init(opts :: term()) :: term()

Called once when the pipeline is assembled.

Receives the options passed to plug Module, opts in the pipeline definition. Returns (possibly transformed) opts that will be passed to call/2 on every event.