101 lines
		
	
	
	
		
			2.6 KiB
		
	
	
	
		
			Elixir
		
	
	
	
	
	
			
		
		
	
	
			101 lines
		
	
	
	
		
			2.6 KiB
		
	
	
	
		
			Elixir
		
	
	
	
	
	
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Gun.ConnectionPoolTest do
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  use Pleroma.DataCase
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  import Mox
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  import ExUnit.CaptureLog
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  alias Pleroma.Config
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  alias Pleroma.Gun.ConnectionPool
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  defp gun_mock(_) do
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    Pleroma.GunMock
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    |> stub(:open, fn _, _, _ -> Task.start_link(fn -> Process.sleep(100) end) end)
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    |> stub(:await_up, fn _, _ -> {:ok, :http} end)
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    |> stub(:set_owner, fn _, _ -> :ok end)
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    :ok
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  end
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  setup :set_mox_from_context
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  setup :gun_mock
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  test "gives the same connection to 2 concurrent requests" do
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    Enum.map(
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      [
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        "http://www.korean-books.com.kp/KBMbooks/en/periodic/pictorial/20200530163914.pdf",
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        "http://www.korean-books.com.kp/KBMbooks/en/periodic/pictorial/20200528183427.pdf"
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      ],
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      fn uri ->
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        uri = URI.parse(uri)
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        task_parent = self()
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        Task.start_link(fn ->
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          {:ok, conn} = ConnectionPool.get_conn(uri, [])
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          ConnectionPool.release_conn(conn)
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          send(task_parent, conn)
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        end)
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      end
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    )
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    [pid, pid] =
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      for _ <- 1..2 do
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        receive do
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          pid -> pid
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        end
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      end
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  end
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  test "connection limit is respected with concurrent requests" do
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    clear_config([:connections_pool, :max_connections]) do
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      Config.put([:connections_pool, :max_connections], 1)
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      # The supervisor needs a reboot to apply the new config setting
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      Process.exit(Process.whereis(Pleroma.Gun.ConnectionPool.WorkerSupervisor), :kill)
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      on_exit(fn ->
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        Process.exit(Process.whereis(Pleroma.Gun.ConnectionPool.WorkerSupervisor), :kill)
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      end)
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    end
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    capture_log(fn ->
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      Enum.map(
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        [
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          "https://ninenines.eu/",
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          "https://youtu.be/PFGwMiDJKNY"
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        ],
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        fn uri ->
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          uri = URI.parse(uri)
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          task_parent = self()
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          Task.start_link(fn ->
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            result = ConnectionPool.get_conn(uri, [])
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            # Sleep so that we don't end up with a situation,
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            # where request from the second process gets processed
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            # only after the first process already released the connection
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            Process.sleep(50)
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            case result do
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              {:ok, pid} ->
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                ConnectionPool.release_conn(pid)
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              _ ->
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                nil
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            end
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            send(task_parent, result)
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          end)
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        end
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      )
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      [{:error, :pool_full}, {:ok, _pid}] =
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        for _ <- 1..2 do
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          receive do
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            result -> result
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          end
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        end
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        |> Enum.sort()
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    end)
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  end
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end
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