Flink CDC(Change Data Capture)是Apache Flink的一个扩展,用于捕获和传输数据库的变更数据。要启动Flink CDC,通常有以下步骤:
确保已经安装了以下环境:
pom.xml
文件中添加Flink CDC的依赖项。例如:<dependency>
<groupId>com.ververica</groupId>
<artifactId>flink-connector-debezium</artifactId>
<version>你的Flink CDC版本</version>
</dependency>
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.table.api.bridge.java.StreamTableEnvironment;
import org.apache.flink.table.api.TableResult;
public class MyFlinkCDCJob {
public static void main(String[] args) throws Exception {
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
StreamTableEnvironment tableEnv = StreamTableEnvironment.create(env);
// 定义MySQL CDC源表
tableEnv.executeSql(
"CREATE TABLE my_source_table (" +
" id INT NOT NULL," +
" name STRING," +
" PRIMARY KEY (id) NOT ENFORCED" +
") WITH (" +
" 'connector' = 'mysql-cdc'," +
" 'hostname' = 'localhost'," +
" 'port' = '3306'," +
" 'username' = 'root'," +
" 'password' = 'password'," +
" 'database-name' = 'mydatabase'," +
" 'table-name' = 'mytable'" +
")"
);
// 定义输出表
tableEnv.executeSql(
"CREATE TABLE my_sink_table (" +
" id INT NOT NULL," +
" name STRING" +
") WITH (" +
" 'connector' = '...', " + // 定义你的输出连接器
" '...' = '...'" + // 定义其他参数
")"
);
// 将数据从源表复制到输出表
TableResult result = tableEnv.executeSql(
"INSERT INTO my_sink_table SELECT * FROM my_source_table"
);
// 执行作业
env.execute("MyFlinkCDCJob");
}
}
./flink run -c com.example.MyFlinkCDCJob path/to/your-job.jar
main
方法启动作业。版权声明:本文内容由阿里云实名注册用户自发贡献,版权归原作者所有,阿里云开发者社区不拥有其著作权,亦不承担相应法律责任。具体规则请查看《阿里云开发者社区用户服务协议》和《阿里云开发者社区知识产权保护指引》。如果您发现本社区中有涉嫌抄袭的内容,填写侵权投诉表单进行举报,一经查实,本社区将立刻删除涉嫌侵权内容。
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