message_store

2.0.0

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An useful extensions for eventstore.

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message_store lib message_store projection.ex

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lib/message_store/projection.ex

defmodule MessageStore.Projection do
  @moduledoc """
  A projection boilerplate.
  """

  defmacro __using__(_env) do
    quote do
      @behaviour MessageStore.ProjectionBehaviour

      alias EventStore.RecordedEvent

      @before_compile unquote(__MODULE__)
    end
  end

  defmacro __before_compile__(_env) do
    quote do
      # default handler when unknown event arrived
      def handle_message(_, data), do: data
    end
  end
end

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