[ISSUE #632 ] Fix NPE caused by using @ ExtRocketMQTemplateConfiguration annotation extension to send messages

lilinjiang commented 6 months ago

What is the purpose of the change Close https://github.com/apache/rocketmq-spring/issues/632

问题现象：修复应用启动时，监听RocketMQ消息后使用@ExtRocketMQTemplateConfiguration注解扩展的RocketMQTemplate发送消息导致的空指针异常问题。问题原因： Listener 启动时机比 @ExtRocketMQTemplateConfiguration注解扩展的RocketMQTemplate中producer 实例化的早，导致Listener监听到消息时 RocketMQTemplate中producer 还未实例化，此时使用未实例化producer属性的RocketMQTemplate发送消息将导致空指针异常。（@RocketMQMessageListener 与 Spring Cloud Stream 的生产者一起使用时同样存在一样的问题，都是因为Listener的启动时机太早）解决方案：推迟了Listener 的启动时机详情见commits

lilinjiang commented 6 months ago

@panzhi33

panzhi33 commented 6 months ago

@panzhi33

@panzhi33

Please help to see if the v5 client also has this problem. If so, please help to submit a PR to fix it.

apache / rocketmq-spring

[ISSUE #632 ] Fix NPE caused by using @ ExtRocketMQTemplateConfiguration annotation extension to send messages #634