Akka Java OneForOneStrategy示例未编译

Question

我正在尝试将OneForOneStrategy粘贴到一个简单的Hello-Akka程序中,就像基于这个文档一样:http://doc.akka.io/docs/akka/2.3.2/java/fault-tolerance.html

private static SupervisorStrategy strategy = new OneForOneStrategy(10,
        Duration.create("1 minute"),
        new Function<Throwable, SupervisorStrategy.Directive>() {

            @Override
            public SupervisorStrategy.Directive apply(Throwable t) {
                if (t instanceof ArithmeticException) {
                    return resume();
                } else if (t instanceof NullPointerException) {
                    return restart();
                } else if (t instanceof IllegalArgumentException) {
                    return stop();
                } else {
                    return escalate();
                }
            }
        }
);

@Override
public SupervisorStrategy supervisorStrategy() {
    return strategy;
}

但是,resume/restart/stop/escalate方法调用不会立即编译.为什么不？

Answer 1

只需添加下面列出的导入：

import static akka.actor.SupervisorStrategy.escalate;
import static akka.actor.SupervisorStrategy.restart;
import static akka.actor.SupervisorStrategy.resume;
import static akka.actor.SupervisorStrategy.stop;

Answer 2

我已经解决了这个问题。您只需要返回 SupervisorStrategy.resume()、SupervisorStrategy.restart() ...等。