SpringBoot 如何通过集成 Flink CDC 来实时追踪 MySql 数据变动

CREATE DATABASE test_db;
USE test_db;
CREATE TABLE users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    email VARCHAR(255) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);
​

<dependencies>
    <!-- Spring Boot Dependencies -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <!-- Flink Dependencies -->
    <dependency>
        <groupId>org.apache.flink</groupId>
        <artifactId>flink-java</artifactId>
        <version>1.12.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.flink</groupId>
        <artifactId>flink-streaming-java_2.12</artifactId>
        <version>1.12.0</version>
    </dependency>
    <!-- Flink CDC Dependencies -->
    <dependency>
        <groupId>com.ververica</groupId>
        <artifactId>flink-connector-mysql-cdc</artifactId>
        <version>2.0.0</version>
    </dependency>
</dependencies>
​

import com.ververica.cdc.connectors.mysql.MySQLSource;
import com.ververica.cdc.connectors.mysql.table.StartupOptions;
import org.apache.flink.api.common.eventtime.WatermarkStrategy;
import org.apache.flink.streaming.api.datastream.DataStreamSource;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class FlinkCdcConfig {
    @Bean
    public DataStreamSource<String> mysqlSource(StreamExecutionEnvironment env) {
        MySQLSource<String> source = MySQLSource.<String>builder()
            .hostname("localhost")
            .port(3306)
            .databaseList("test_db")
            .tableList("test_db.users")
            .username("root")
            .password("password")
            .deserializer(new JsonDebeziumDeserializationSchema())
            .startupOptions(StartupOptions.initial())
            .build();
        return env.fromSource(source, WatermarkStrategy.noWatermarks(), "MySQL Source");
    }
}
​

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;
@Component
public class FlinkJobRunner implements CommandLineRunner {
    private final StreamExecutionEnvironment env;
    private final DataStreamSource<String> mysqlSource;
    public FlinkJobRunner(StreamExecutionEnvironment env, DataStreamSource<String> mysqlSource) {
        this.env = env;
        this.mysqlSource = mysqlSource;
    }
    @Override
    public void run(String... args) throws Exception {
        mysqlSource.print();
        env.execute("Flink CDC Job");
    }
}
​

INSERT INTO users (name, email) VALUES ('Alice', 'alice@example.com');
INSERT INTO users (name, email) VALUES ('Bob', 'bob@example.com');
​