java - 出现异常时重试 spring 集成 IntegrationFlow

Question

我有一个 spring 集成 IntegrationFlow ，其定义如下:

IntegrationFlows.from(Amqp.inboundAdapter(connectionFactory, "queueName")
                    .id("id")
                    .autoStartup(autoStartup)
                    .concurrentConsumers(2)
                    .maxConcurrentConsumers(3)
                    .messageConverter(messageConverter()))
                    .aggregate(a -> ...)
                    .handle(serviceActivatorBean)
                    .get();

serviceActivatorBean 看起来像这样:

@Component
@Transactional
public class ServiceActivator {

    @ServiceActivator

    public void myMethod(Collection<MyEvent> events) {
        ....
    }    
}

如果myMethod抛出异常，则会记录该异常，但不会发生重试。我尝试将 IntegrationFlow 更改为:

RequestHandlerRetryAdvice advice = new RequestHandlerRetryAdvice();
RetryTemplate retryTemplate = new RetryTemplate();
SimpleRetryPolicy retryPolicy = new SimpleRetryPolicy();
retryPolicy.setMaxAttempts(5);
retryTemplate.setRetryPolicy(retryPolicy);
advice.setRetryTemplate(retryTemplate);

IntegrationFlows.from(Amqp.inboundAdapter(connectionFactory, "queueName")
                    .id("id")
                    .autoStartup(autoStartup)
                    .adviceChain(advice)
                    .concurrentConsumers(2)
                    .maxConcurrentConsumers(3)
                    .messageConverter(messageConverter()))
                    .aggregate(a -> ...)
                    .handle(serviceActivatorBean)
                    .get();

但是我收到了这样的日志消息(不会发生重试):

2017-06-30 13:18:10.611 WARN 88706 --- [erContainer#1-2] o.s.i.h.a.RequestHandlerRetryAdvice : This advice org.springframework.integration.handler.advice.RequestHandlerRetryAdvice can only be used for MessageHandlers; an attempt to advise method 'invokeListener' in 'org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$1' is ignored

如何配置此 IntegrationFlow 使其行为与 RabbitListener 相同？ IE。让 RabbitMQ 再次发布消息。

Answer 1

使用 retry interceptor在适配器的建议链中，而不是在 RequestHandlerRetryAdvice 中 - 正如消息所述，它用于消费端点。