如何配置 Spring Cloud Stream 发布者重试？

Question

我正在使用 RabbitMQ 活页夹。

Spring Cloud Stream 允许开发人员在消费消息时发生异常时重试。

当 RabbitMQ 连接丢失时，生产者可能会失败。我们如何配置 SCS 以便在生成消息时出现任何错误时重试？或者有没有办法在那里应用断路器？

谢谢

Answer 1

您可以使用标准 spring boot properties（retry.enabled 等）- 向下滚动到 rabbitmq - 在生产者端配置重试。活页夹会将重试模板连接到出站适配器的 RabbitTemplate.

spring.rabbitmq.template.retry.enabled=false # Whether publishing retries are enabled.
spring.rabbitmq.template.retry.initial-interval=1000ms # Duration between the first and second attempt to deliver a message.
spring.rabbitmq.template.retry.max-attempts=3 # Maximum number of attempts to deliver a message.
spring.rabbitmq.template.retry.max-interval=10000ms # Maximum duration between attempts.
spring.rabbitmq.template.retry.multiplier=1 # Multiplier to apply to the previous retry interval.

这是活页夹中的代码...

        if (rabbitProperties != null && rabbitProperties.getTemplate().getRetry().isEnabled()) {
            Retry retry = rabbitProperties.getTemplate().getRetry();
            RetryPolicy retryPolicy = new SimpleRetryPolicy(retry.getMaxAttempts());
            ExponentialBackOffPolicy backOff = new ExponentialBackOffPolicy();
            backOff.setInitialInterval(retry.getInitialInterval().toMillis());
            backOff.setMultiplier(retry.getMultiplier());
            backOff.setMaxInterval(retry.getMaxInterval().toMillis());
            RetryTemplate retryTemplate = new RetryTemplate();
            retryTemplate.setRetryPolicy(retryPolicy);
            retryTemplate.setBackOffPolicy(backOff);
            rabbitTemplate.setRetryTemplate(retryTemplate);
        }