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step_flow

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Step flow manager for Elixir applications

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step_flow lib step_flow metrics workflow_instrumenter.ex
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lib/step_flow/metrics/workflow_instrumenter.ex 

defmodule StepFlow.Metrics.WorkflowInstrumenter do

  @moduledoc """

  Prometheus metrics instrumenter to call workflow metric collectors

  """

  use Prometheus.Metric



  def setup do

    Prometheus.Registry.register_collector(StepFlow.Metrics.WorkflowCollector)

    Prometheus.Registry.register_collector(StepFlow.Metrics.LiveWorkflowProcessingCollector)



    Counter.declare(

      name: :step_flow_workflows_status_total,

      help: "Number of workflows by status.",

      labels: [:name, :status]

    )

  end



  def inc(:step_flow_workflows_status_total, workflow_name, workflow_status) do

    if StepFlow.Configuration.metrics_enabled?() do

      case workflow_status do

        :created_workflow ->

          Counter.inc(name: :step_flow_workflows_status_total, labels: [workflow_name, "created"])



        :completed ->

          Counter.inc(

            name: :step_flow_workflows_status_total,

            labels: [workflow_name, "completed"]

          )



        :error ->

          Counter.inc(name: :step_flow_workflows_status_total, labels: [workflow_name, "error"])



        :stopped ->

          Counter.inc(name: :step_flow_workflows_status_total, labels: [workflow_name, "stopped"])



        _ ->

          :ok

      end

    end

  end

end