FlinkSql cdc mysql to mysql_flink sql mysql-cdc group by 结果写入 mysql-优快云博客

本文链接：https://blog.youkuaiyun.com/java_boss_/article/details/126161337

本文介绍了如何使用Apache Flink和Mysql CDC实现从MySQL binlog到Flink的实时数据同步，包括创建表、插入和更新操作，并展示了关键依赖配置。

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pom文件

 <properties>
        <flink.version>1.13.6</flink.version>
        <scala.binary.version>2.12</scala.binary.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-connector-jdbc_${scala.binary.version}</artifactId>
            <version>${flink.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-table-planner-blink_${scala.binary.version}</artifactId>
            <version>${flink.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-java</artifactId>
            <version>${flink.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-streaming-java_${scala.binary.version}</artifactId>
            <version>${flink.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-clients_${scala.binary.version}</artifactId>
            <version>${flink.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-runtime-web_${scala.binary.version}</artifactId>
            <version>${flink.version}</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba.ververica</groupId>
            <artifactId>flink-connector-mysql-cdc</artifactId>
            <version>1.4.0</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.20</version>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.75</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>3.1.0</version>
                <configuration>
                    <createDependencyReducedPom>false</createDependencyReducedPom>
                </configuration>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>

                        <configuration>
                            <transformers>
                                <transformer
                                        implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                    <!--如果要打包的话，这里要换成对应的 main class-->
                                    <mainClass>demo.flinkcdc_binlog.MysqlBinlogCdcToMysql</mainClass>
                                </transformer>
                                <transformer
                                        implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                    <resource>reference.conf</resource>
                                </transformer>
                            </transformers>
                            <filters>
                                <filter>
                                    <artifact>*:*:*:*</artifact>
                                    <excludes>
                                        <exclude>META-INF/*.SF</exclude>
                                        <exclude>META-INF/*.DSA</exclude>
                                        <exclude>META-INF/*.RSA</exclude>
                                    </excludes>
                                </filter>
                            </filters>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>6</source>
                    <target>6</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

代码

package flinksql;

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.table.api.bridge.java.StreamTableEnvironment;

public class flinksql_cdc {
    public static void main(String[] args) throws Exception {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        StreamTableEnvironment tableEnv = StreamTableEnvironment.create(env);
        tableEnv.executeSql("create table demo1(" +
                " id INT," +
                " username STRING," +
                " password STRING," +
                " primary key (id) not enforced" +
                ")WITH(" +
                " 'connector' = 'mysql-cdc'," +
                " 'hostname' = 'localhost'," +
                " 'port' = '3306'," +
                " 'username' = 'root'," +
                " 'password' = '123456'," +
                " 'database-name' = 'old_data'," +
                " 'table-name' = 'demo'" +
                ")");

        tableEnv.executeSql("create table demo2(" +
                " id INT," +
                " username STRING," +
                " password STRING," +
                " primary key (id) not enforced" +
                ")WITH(" +
                " 'connector' = 'jdbc'," +
                " 'url' = 'jdbc:mysql://localhost:3306/new_data?serverTimezone=UTC'," +
                " 'username' = 'root'," +
                " 'password' = '123456'," +
                " 'table-name' = 'demo_info'," +
                " 'driver' = 'com.mysql.cj.jdbc.Driver'," +
                " 'scan.fetch-size' = '200'" +
                ")");
        tableEnv.executeSql("insert into demo2 select id,username,password from demo1");
        tableEnv.executeSql("select * from demo1").print();
        env.execute("FLinkSql Cdc");

    }
}