如何在应用程序中访问Play Framework 2.4 guice Injector？ [英] How to access Play Framework 2.4 guice Injector in application?

问题描述

我想在Play Framework 2.4中使用Guice Injector 类的 getInstance 方法，如何访问它？

I want to use the getInstance method of the Guice Injector class in Play Framework 2.4, how can I access it?

我使用Guice FactoryModuleBuilder 来实现一个在运行时返回另一个工厂的工厂！在返回工厂的第二级，我需要访问Play Guice Injector以使用反射手动获取对象，而不是 @Inject 注释。

I have used the Guice FactoryModuleBuilder for implementing a factory that returns another factory at runtime! At the second level of returning a factory I need to access the Play Guice Injector to get objects manually using reflection instead of @Inject annotation.

推荐答案

有很多方法。我用这个。

There are many ways. I use this one.

编辑：这与Play版本相关，< = 2.4：

This is relevant for Play versions which are <= 2.4:

Play.maybeApplication.map(_.injector.instanceOf[MyProdClass]).getOrElse(new MyDevClass)

或

Play.current.injector.instanceOf[MyClass]

对于> = 2.5的版本：

For versions which are >= 2.5:

import play.api.inject.Injector
import javax.inject.Inject

class MyService @Inject() (injector: Injector) ={
    val myClassInstance = injector.instanceOf[MyClass]
    //do stuff
}

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