delayed_paperclip 使用 ActiveJob 而不是 Resque

Question

我已配置 Delayed::Paperclip 在后台处理回形针附件。我安装并配置了 Resque，根据 README，Resque 现在应该处理后台任务：

Make sure that you have Resque up and running. The jobs will be dispatched to the :paperclip queue, so you can correctly dispatch your worker. Configure resque and your workers exactly as you would otherwise.

但是，运行ning 后台任务的另一个框架 Active Job 作为 Rails 4.1/ActionMailer 的依赖项安装，它 "steals" 来自 Resque 的任务。

 [ActiveJob] Enqueued DelayedPaperclip::Jobs::ActiveJob (Job ID: ba60f576-e544-4f53-8db2-eb0085f1f653) to Inline(paperclip) with arguments: "Photo", 79, "picture"

问题是 Active Job 似乎运行立即在同一线程中运行 - 基本上它根本不会运行在后台运行。

我检查了 Delayed::Paperclip 的代码，安装的后端似乎有优先级：

def detect_background_task
  return DelayedPaperclip::Jobs::ActiveJob  if defined? ::ActiveJob::Base
  return DelayedPaperclip::Jobs::DelayedJob if defined? ::Delayed::Job
  return DelayedPaperclip::Jobs::Resque     if defined? ::Resque
  return DelayedPaperclip::Jobs::Sidekiq    if defined? ::Sidekiq
end

当我调换它们并将 Resque 放在最上面时，它起作用了。优先级似乎是硬编码的，但我想如果是这样的话，我不会是唯一遇到这个问题的人。这是一个错误还是我遗漏了什么？

Answer 1

Active Job 实际上是一个非常好的主要选择，因为它充当抽象层：

Active Job is a framework for declaring jobs and making them run on a variety of queueing backends. [...] The main point is to ensure that all Rails apps will have a job infrastructure in place, even if it's in the form of an "immediate runner".

默认为运行立即执行任务，但也可以选择其他后端。这些后端之一是 Resque。所以你唯一需要做的就是配置 Active Job 来使用 Resque：Delayed::Paperclip → Active Job → Resque。只需将其放入您的 application.rb:

module MyApp
  class Application < Rails::Application
    ...
    config.active_job.queue_adapter = :resque
  end
end

可能应该更新 Delayed::Paperclip 自述文件。

delayed_paperclip 使用 ActiveJob 而不是 Resque

delayed_paperclip uses ActiveJob instead of Resque

paperclip

resque

ruby-on-rails-4

delayed-paperclip