[ISSUE #632 ] Fix NPE caused by using @ ExtRocketMQTemplateConfiguration annotation extension to send messages #634
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…Template发送消息导致空指针异常问题。 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）
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Author
panzhi33
approved these changes
Mar 1, 2024
Contributor
RongtongJin
approved these changes
Mar 3, 2024
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What is the purpose of the change
Close #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