我们如何称呼“模板缓存"?适用于Play 2.1? [英] How do we call "Caching in Template" for Play 2.1?

问题描述

我们正在尝试遵循 http://中列出的模板缓存"示例www.playframework.com/documentation/2.1.1/JavaCache ，编译器向我们抛出"not enough arguments for method getOrElse"异常消息.

We are trying to follow the "Caching in templates" example listed in http://www.playframework.com/documentation/2.1.1/JavaCache and the compiler throws us an "not enough arguments for method getOrElse" exception message.

模板中的代码:

@play.cache.Cache.getOrElse("cached-content", 3600){
    test
}

因此，我们决定对API进行挖掘，显然我们仍然缺少java.util.concurrent.Callable参数.有人知道我们应该为该参数传递什么吗?

So we decided to dig the API and apparently we still short of java.util.concurrent.Callable parameter. Does anyone know what should we pass in for that parameter?

谢谢

播放2.1.1 Javadoc

推荐答案

这是因为您试图使用Scala缓存API的语法从Scala模板中使用Java API.如果要使用文档中的示例，则需要编写如下内容:

it's because you are trying to use a Java API from a Scala template with the syntaxe of the Scala cache API. If you want to use the example from the documentation you need to write something like :

@import play.api.Play.current
@play.api.cache.Cache.getOrElse("key", 3600) {
    <h1>Cached content</h1>
} 

play.api软件包是Scala API的软件包.

the play.api package is the package for Scala APIs.

如果您想通过模板使用Java Cache API，则此API需要3个参数，您需要编写类似以下内容的

If you want to use the Java Cache API from a template, this API takes 3 parameters and you need to write something like :

@play.cache.Cache.getOrElse("key", new java.util.concurrent.Callable[String] {
    def call: String = "Cached content again"
}, 3600)

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