SpringBoot整合Flink CDC实现实时追踪mysql数据变动

[mysqld]
server-id=1
# 设置日志格式为行级格式
binlog-format=Row
# 设置binlog日志文件的前缀
log-bin=mysql-bin
# 指定需要记录二进制日志的数据库
binlog_do_db=testjpa

mysql> SHOW VARIABLES LIKE 'log_bin';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| log_bin       | ON    |
+---------------+-------+

<dependencies>
    <!-- Flink dependency -->
    <dependency>
        <groupId>org.apache.flink</groupId>
        <artifactId>flink-java</artifactId>
        <version>1.14.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.flink</groupId>
        <artifactId>flink-streaming-java_2.12</artifactId>
        <version>1.14.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.flink</groupId>
        <artifactId>flink-connector-mysql-cdc</artifactId>
        <version>2.0.0</version>
    </dependency>
    <!-- Spring Boot dependencies -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>
</dependencies>

flink:
  checkpoint:
    interval: 10000
  parallelism: 1

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/your_database
    username: your_username
    password: your_password

import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.table.api.bridge.java.StreamTableEnvironment;
import org.springframework.stereotype.Service;

@Service
public class FlinkCdcService {

    public void startDataStreaming() {
        final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        final StreamTableEnvironment tableEnv = StreamTableEnvironment.create(env);

        // 使用Flink CDC连接MySQL
        String name = "inventory";
        tableEnv.executeSql("CREATE TABLE " + name + " (" +
            "  id INT," +
            "  name STRING," +
            "  description STRING," +
            "  weight DECIMAL(10, 3)" +
            ") WITH (" +
            "  'connector' = 'mysql-cdc'," +
            "  'hostname' = 'localhost'," +
            "  'port' = '3306'," +
            "  'username' = 'your_username'," +
            "  'password' = 'your_password'," +
            "  'database-name' = 'your_database'," +
            "  'table-name' = 'your_table'" +
            ")");

        // 查询并打印结果
        DataStream<String> dataStream = tableEnv.sqlQuery("SELECT * FROM " + name).execute().print();

        try {
            env.execute("Flink CDC Demo");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class FlinkCdcApplication implements CommandLineRunner {

    @Autowired
    private FlinkCdcService flinkCdcService;

    public static void main(String[] args) {
        SpringApplication.run(FlinkCdcApplication.class, args);
    }

    @Override
    public void run(String... args) throws Exception {
        flinkCdcService.startDataStreaming();
    }
}