Akka：如何让演员在主管身上引起异常

Question

我怎样才能知道哪个儿童演员对主管有例外。基本上我想处理其他事情，比如将失败记录到数据库等。在停止失败的演员之前。但为此我必须确切地知道哪个演员有例外。

我的 supervisorStrategy 代码块像

/* stop task actor on unhandled exception */
private static SupervisorStrategy strategy = new OneForOneStrategy(
        1,
        Duration.create(1, TimeUnit.MINUTES),
        new Function<Throwable, SupervisorStrategy.Directive>() {
            @Override
            public SupervisorStrategy.Directive apply(Throwable t) throws Exception {
                return SupervisorStrategy.stop();
            }
        }
);

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

Answer 1

当您观看child时，您将获得Terminated message with actor field and other info. See also What Lifecycle Monitoring Means. You can also process failure inside child actor itself, by overriding its preRestart/postRestart方法。

Answer 2

如果你阅读下面link关于Fault Tolerance的内容，你会发现在一个监督策略中，你可以根据这条信息得到失败的child actor ref :

If the strategy is declared inside the supervising actor (as opposed to a separate class) its decider has access to all internal state of the actor in a thread-safe fashion, including obtaining a reference to the currently failed child (available as the getSender of the failure message).

因此，如果您在监督策略中使用 getSender，您应该能够确定哪个 child 产生了异常并采取相应措施。

Akka：如何让演员在主管身上引起异常

Akka : How to get actor causing exception on supervisor

java

akka