@RabbitListener @Payload 驗證

從 2.3.7 版本開始，現在更容易新增 Validator 來驗證 @RabbitListener 和 @RabbitHandler 的 @Payload 引數。現在，您可以直接將驗證器新增到註冊器本身。

@Configuration
@EnableRabbit
public class Config implements RabbitListenerConfigurer {
    ...
    @Override
    public void configureRabbitListeners(RabbitListenerEndpointRegistrar registrar) {
      registrar.setValidator(new MyValidator());
    }
}

當使用 Spring Boot 並引入 validation starter 時，會自動配置 LocalValidatorFactoryBean

@Configuration
@EnableRabbit
public class Config implements RabbitListenerConfigurer {
    @Autowired
    private LocalValidatorFactoryBean validator;
    ...
    @Override
    public void configureRabbitListeners(RabbitListenerEndpointRegistrar registrar) {
      registrar.setValidator(this.validator);
    }
}

要進行驗證

public static class ValidatedClass {
  @Max(10)
  private int bar;
  public int getBar() {
    return this.bar;
  }
  public void setBar(int bar) {
    this.bar = bar;
  }
}

和

@RabbitListener(id="validated", queues = "queue1", errorHandler = "validationErrorHandler",
      containerFactory = "jsonListenerContainerFactory")
public void validatedListener(@Payload @Valid ValidatedClass val) {
    ...
}
@Bean
public RabbitListenerErrorHandler validationErrorHandler() {
    return (m, e) -> {
        ...
    };
}