1

如何在使用 CompletableFuture.get() 时捕获 CompletableFuture.completeExceptionally() 抛出的异常？

这是一些代码

public CompletableFuture<Hello> sayHelloAsync() {
CompletableFuture<Hello> future = new CompletableFuture<>();
    try{
        sayHello(); //throws HelloException
    } catch (HelloException ex) {
        future.completeExceptionally(new MyException("hello exception"));
        return future;
    }
    return future;
}

Now I want to do .get() or .join on this as follows
CompletableFuture<Hello> resultFuture = sayHelloAsync();
try{
    result.get(); // throws ExecutionException but I want to catch My Exception in the simplest way possible but not by throwing another exception while catching the Execution exception and so on. 
} catch(ExecutionException ex) {
      throw ex.getCause();
} catch (MyException e) {
      e.printStackTrace() 
}

这是非常丑陋的。同样，我只想用尽可能少的代码行并以最简洁的方式捕获 MyException。不确定 isCompletedExceptionally() 是否异常，join() 可以帮助以最简单的方式捕获 MyException。如果有怎么办？

4

0 回答 0