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canal + kafka 封装demo

准备工作

  1. 复制 canal config 两个包完整内容到自己的项目（基础类相关）
  2. 在自己项目新建一个 dbchange 及 dbchange/listener 包，留作 监听业务逻辑相关代码 存放使用
  3. 如果项目没有引入kafka，需要自行导入相关依赖，SpringBoot项目可以参考本demo的 pom.xml 文件
  4. 复制 application.properties 中 kafka相关配置到自己的项目
    • 如果自己项目已经在使用 kafka 请注意配置项spring.kafka.consumer.enable-auto-commit:false
    • 若自己的项目中该配置是true，可自行修改 CanalRoot 中的监听代码（去掉ack相关代码）
  5. 修改 CanalRoot.PACKAGE_OF_DBCHANGE 变量，指定自己项目的 dbchange 完整包名
  6. 开始使用

简单介绍

  • dbchange 中存放与数据库表相对应的spring事件，命名规则：表名转驼峰+Event
  • dbchange/listener 中存放监听各个表事件的方法，推荐命名规则（非强制）：表名转驼峰+业务描述
  • 监听基类分两种
    • 异步消费：DBChangeBaseListenerAsync java获取到的数据库变动顺序可能是乱的
    • 同步消费：DBChangeBaseListenerSync java获取到的数据库变动是有序的
  • 严谨情况下，不知道该用哪种基类，就用"同步版" DBChangeBaseListenerSync

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