StartFlowex

Examples how to start Flowex pipelines

###In general there are three options:

1. Start pipelines in arbitrary supervised process

defmodule PipelineGenServer do
  use GenServer

  def init(_opts) do
    pipeline_one = PipelineOne.start
    pipeline_two = PipelineTwo.start

    {:ok, %{pipeline_one: pipeline_one, pipeline_two: pipeline_two}}
  end
end

You can also store pipeline structure in Agent or Application environment

2. Start one pipeline per application. In that case pipeline supervisor will be the main supervisor in the application:

defmodule OnePipelinePerApp do
  use Application

  def start(_type, _opts) do
    pipeline = PipelineOne.start
    Application.put_env(:start_flowex, :pipeline, pipeline)
    {:ok, pipeline.sup_pid}
  end
end

3. Start several pipelines inside one application using supervised_start function. In that case pipeline supervisors will be placed under application supervisor:

defmodule TwoPipelinesPerApp do
  use Application

  def start(_type, _opts) do
    {:ok, supervisor_pid} = Supervisor.start_link([], strategy: :one_for_one, name: :multi_flowex_sup)

    pipeline_one = PipelineOne.supervised_start(supervisor_pid)
    pipeline_two = PipelineTwo.supervised_start(supervisor_pid)

    Application.put_env(:start_flowex, :pipeline_one, pipeline_one)
    Application.put_env(:start_flowex, :pipeline_two, pipeline_two)

    {:ok,supervisor_pid}
  end
end

You can play around with different cases by choosing application module in application function in mix.exs file

def application do
  [
    mod: {InsideSupervisedGenServer, []}
    # mod: {OnePipelinePerApp, []}
    # mod: {TwoPipelinesPerApp, []}
  ]
end```