使用 play WS 2.5.x from Akka actor

Question

我将 akka 与 java 一起使用，并正在寻找一种在 akka actor 中使用异步播放 WS api 的方法。

在玩 WS 2.4.x 方法 WSRequest.get() returns 一个 F.Promise 可以很容易地转换为 Scala Future 然后用 akka.pattern.Patterns.pipe 发送给某个 akka actor，以便将 http 响应作为 akka 消息接收。

在玩 WS 2.5.x 方法 WSRequest.get() returns a CompletionStage 我不知道如何将它传递给 Akka 演员。

那么如何在 Akka actor 中正确使用 play WS 2.5.x api？

Answer 1

来自migration guide：

While Play 2.4 was cross compiled against both Scala 2.10 and Scala 2.11, this new release of Play is only available for Scala 2.11. The reason for dropping Scala 2.10 support is that Play has a new library dependency on scala-java8-compat, which is only available for Scala 2.11. This library makes it easy to convert from and to common Scala and Java8 types, and hence it’s valuable to simplify the Play core. Furthermore, you may also find it handy to use in your own Play project. For example, if you need to convert Scala Future instances into Java CompletionStage (or the other way around).

我很确定you can still do it easy:

import static scala.compat.java8.FutureConverters.*;

...

final Promise<String> p = promise();
final Future<String> sf = p.future();
final CompletionStage<String> cs = toJava(sf);
Future<String> sf1 = toScala(cs);