lpeppe

defmodule PhxHealthcheckWeb.HealthcheckController do
  use PhxHealthcheckWeb, :controller

  alias PhxHealthcheck.Healthcheck

  def status(conn, _params) do
    monitorable_services =
      :phx_healthcheck
      |> Application.get_env(:healthcheck, services: [])
      |> Keyword.fetch!(:services)

lpeppe

defmodule PhxHealthcheckWeb.Router do
  use PhxHealthcheckWeb, :router

  get "/status", PhxHealthcheckWeb.HealthcheckController, :status
end

lpeppe

defmodule PhxHealthcheck.Healthcheck do
  @callback check_status() :: String.t()

  @spec get_service_status(atom()) :: String.t()
  def get_service_status(service) do
    GenServer.call(service, {:get_status})
  end
end

lpeppe

config :phx_healthcheck, :healthcheck,
  services: [
    {PhxHealthcheck.Healthcheck.Services.Database, [name: "database", refresh_interval: 10000]}
  ]

lpeppe

defmodule PhxHealthcheck.Healthcheck.Supervisor do
  alias PhxHealthcheck.Healthcheck.Worker

  use Supervisor

  def start_link(init_arg) do
    Supervisor.start_link(__MODULE__, init_arg, name: __MODULE__)
  end

  @impl true

lpeppe

defmodule PhxHealthcheck.Healthcheck.Worker do
  use GenServer

  @spec start_link(list()) :: GenServer.on_start()
  def start_link([service | _] = args) do
    GenServer.start_link(__MODULE__, args, name: service)
  end

  @impl true
  def init([service, refresh_interval]) do

lpeppe

defmodule PhxHealthcheck.Healthcheck.Services.Database do
  alias PhxHealthcheck.{Healthcheck, Repo}
  import Ecto.Adapters.SQL

  @behaviour Healthcheck

  def check_status() do
    try do
      query(Repo, "SELECT 1")
    rescue

lpeppe

defmodule PhxHealthcheck.Healthcheck do
  @callback check_status() :: String.t()
end

lpeppe

{
    "database": "healthy",
    "document_processor": "healthy",
    "payment_system": "unhealthy"
}

lpeppe

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To claim this, I am signing this object: