多个监听器，相同主题

从 3.0 版本开始，现在可以在同一个主题上配置多个监听器。为此，必须使用自定义主题命名来隔离重试主题。最好用一个例子来说明。

@RetryableTopic(...
        retryTopicSuffix = "-listener1", dltTopicSuffix = "-listener1-dlt",
        topicSuffixingStrategy = TopicSuffixingStrategy.SUFFIX_WITH_INDEX_VALUE)
@KafkaListener(id = "listener1", groupId = "group1", topics = TWO_LISTENERS_TOPIC, ...)
void listen1(String message, @Header(KafkaHeaders.RECEIVED_TOPIC) String receivedTopic) {
    ...
}

@RetryableTopic(...
        retryTopicSuffix = "-listener2", dltTopicSuffix = "-listener2-dlt",
        topicSuffixingStrategy = TopicSuffixingStrategy.SUFFIX_WITH_INDEX_VALUE)
@KafkaListener(id = "listener2", groupId = "group2", topics = TWO_LISTENERS_TOPIC, ...)
void listen2(String message, @Header(KafkaHeaders.RECEIVED_TOPIC) String receivedTopic) {
    ...
}

topicSuffixingStrategy是可选的。框架将为每个监听器配置和使用一组单独的重试主题。