Play.current 在 play 2.5 中被弃用 [英] Play.current is deprecated in play 2.5

问题描述

我目前正在通过以下方式使用 Play.current.

I am currently using Play.current in the following way.

import play.api.{Logger, Play}

object ApplicationConfig {

  val app = Play.current
  def getConfInt(key: String): Option[Int] = {
    val result = app.configuration.getInt(key)
    result
  }
}

自从迁移到 2.5 以来，我有一个警告说它已被

Since migrating to 2.5, I have a warning saying that it is deprecated with

这是对应用程序的静态引用，请改用 DI"

"This is a static reference to application, use DI instead"

但是，文档并没有确切说明我应该如何使用 DI.

However, the doc doesn't exactly say how am I supposed to use DI instead.

谢谢

推荐答案

根据您的用例，您现在应该使用 Environment、ApplicationLifecycle 和 Configuration 而不是 Application

Depending on your use case you should now use Environment, ApplicationLifecycle and Configuration instead of Application

在您的情况下，您实际上对配置感兴趣，因此在 Play 2.5.x 中执行此操作的方法如下:

In your case you are actually interested in the configuration so the way to do this in Play 2.5.x would be like this:

class HomeController @Inject() (configuration: play.api.Configuration) extends Controller {

  def config = Action {
    Ok(configuration.underlying.getInt("some.config.key"))
  }

}

我提供的示例适用于控制器，但您也可以在应用程序的其他地方使用这种方法.我只是不喜欢你提供的 ApplicationConfig 对象 - 在迁移到 Play 2.5.x 时考虑重构它 - 现在 DI 是要走的路

The example I provided is for a controller but you can use this approach also on other places in your application. I just didn't like the ApplicationConfig object you provided - consider refactoring it when migrating to Play 2.5.x - DI is now the way to go

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