我使用SimpleRetryPolicy / RetryTemplate尝试使用Simple java类的spring retry框架。它工作正常。所以我想用Annotations做同样的事情。注释从来没有对我有用。没有在网上找到很多帮助。下面的代码就像普通的Java程序一样,在第一次尝试时抛出异常,这不是预期的行为。在抛出异常或从中恢复之前,它应该至少试过5次。不知道我哪里出错了。我是否需要执行任何XML / spring AOP配置才能工作?怎么会
import org.springframework.context.annotation.Configuration;
import org.springframework.retry.annotation.EnableRetry;
@EnableRetry
@Configuration
public class App {
public static void main(String[] args) throws Exception {
Parentservice p = new SpringRetryWithHystrixService();
String status = p.getStatus();
System.out.println(status);
}
}
import org.springframework.retry.annotation.Retryable;
public interface Parentservice {
@Retryable(maxAttempts=5)
String getStatus() throws Exception;
}
import org.springframework.retry.annotation.Recover;
public class SpringRetryWithHystrixService implements Parentservice{
public static int i=0;
public String getStatus() throws Exception{
System.out.println("Attempt:"+i++);
throw new NullPointerException();
}
@Recover
public static String getRecoveryStatus(){
return "Recovered from NullPointer Exception";
}
}
我在界面和实现的顶部尝试了@Retryable(maxAttempts = 5),但没有任何区别。
答案 0 :(得分:6)
您的申请必须由Spring管理,您不能只使用new ...
Parentservice p = new SpringRetryWithHystrixService();
这是一个Spring Boot应用程序......
@SpringBootApplication
@EnableRetry
public class So40308025Application {
public static void main(String[] args) throws Exception {
ConfigurableApplicationContext context = SpringApplication.run(So40308025Application.class, args);
System.out.println(context.getBean(SpringRetryWithHystrixService.class).getStatus());
context.close();
}
}
@Component
public class SpringRetryWithHystrixService {
public static int i = 0;
@Retryable(maxAttempts = 5)
public String getStatus() throws Exception {
System.out.println("Attempt:" + i++);
throw new NullPointerException();
}
@Recover
public static String getRecoveryStatus() {
return "Recovered from NullPointer Exception";
}
}
结果:
Attempt:0
Attempt:1
Attempt:2
Attempt:3
Attempt:4
Recovered from NullPointer Exception
如果您因某些原因不想使用Spring Boot,请使用
@Configuration
@EnableRetry
public class So40308025Application {
public static void main(String[] args) throws Exception {
ConfigurableApplicationContext context = new AnnotationConfigApplicationContext(So40308025Application.class);
System.out.println(context.getBean(SpringRetryWithHystrixService.class).getStatus());
context.close();
}
@Bean
public SpringRetryWithHystrixService service() {
return new SpringRetryWithHystrixService();
}
}
答案 1 :(得分:0)
就我而言,我必须删除@EnableRetry批注才能使其正常工作。