@Recover 不适用于自定义异常答案

【问题标题】：@Recover is not working for custom exception@Recover 不适用于自定义异常
【发布时间】：2021-11-10 16:09:04
【问题描述】：

以下重试工作正常。在 3 次尝试失败后调用恢复方法

@Retryable(value = MyException.class)
public String getSomething(String performanceId) {
    String s = "test";
     ...
     throw new MyException("test", new RuntimeException());
     ...
    return s;
 }

@Recover
public String recover(MyException exception, String performanceId) {
     log.info("In recover method!!!!!!!!!!!!!!!!!!");
     return "test";
}

但是当我更改返回类型时，将不会调用以下恢复方法。你能告诉我为什么以及如何解决这个问题吗？非常感谢！

@Retryable(value = MyException.class)
public MyOwnType getSomething(String performanceId) {
    MyOwnType s = new MyOwnType();
     ...
     throw new MyException("test", new RuntimeException());
     ...
    return s;
 }

@Recover
public MyOwnType recover(MyException exception, String performanceId) {
     log.info("In recover method!!!!!!!!!!!!!!!!!!");
     return new MyOwnType();
}

public class MyOwnType implements Serializable {
...
}

编辑：我忘了提到我也在抛出一个自定义异常

public class MyException extends RuntimeException {

    private static final long serialVersionUID = 1L;

    public MyException(String message, Throwable cause) {
        super(message, cause);
    }

}

【问题讨论】：

标签： java spring spring-retry

【解决方案1】：

这对我来说很好；你确定你有@EnableRetry？

@SpringBootApplication
@EnableRetry
public class So69916559Application {

    public static void main(String[] args) {
        SpringApplication.run(So69916559Application.class, args);
    }


    @Bean
    ApplicationRunner runner(Test test) {
        return args -> {
            System.out.println(test.getSomething("foo"));
        };
    }

}

@Component
class Test {

    private static final Logger log = LoggerFactory.getLogger(Test.class);

    @Retryable(value = RuntimeException.class)
    public MyOwnType getSomething(String performanceId) {
        MyOwnType s = new MyOwnType();
        log.info("here");
        throw new RuntimeException();
    }

    @Recover
    public MyOwnType recover(RuntimeException exception, String performanceId) {
        log.info("In recover method!!!!!!!!!!!!!!!!!!");
        return new MyOwnType();
    }

}

class MyOwnType implements Serializable {

}

结果

here
here
here
In recover method!!!!!!!!!!!!!!!!!!
com.example.demo.MyOwnType@3f725306

【讨论】：

感谢您的回复！是的，我有所有必要的注释。否则，第一种情况是行不通的。我忘了提到我正在抛出可能包含不同异常类型的自定义异常。我怀疑这可能是原因？

【解决方案2】：

通过将恢复方法更改为解决问题

@Recover
public MyOwnType recover(RuntimeException exception, String performanceId) {
     log.info("In recover method!!!!!!!!!!!!!!!!!!");
     return new MyOwnType();
}

即使 MyException 扩展了 RuntimeException。如果期待 MyException，recover 方法将不会被调用。不知道为什么

【讨论】：