Flink cdc同步mysql到starrocks(日期时间格式/时区处理）_flinkcdc时间类字段同步

环境

flink 1.15.3(此时最新版本为1.16.1)
mysql 5.7+
starrocks 2.5.2

mysql同步表结构

mysql中的timestamp字段是可以正常同步的，但是多了8小时，设置了mysql链接属性也没效果

CREATE TABLE `temp_flink` (
  `id` int(11) NOT NULL,
  `name` varchar(100) COLLATE utf8mb4_general_ci DEFAULT NULL,
  `remark` varchar(100) COLLATE utf8mb4_general_ci DEFAULT NULL,
  `create_date` datetime DEFAULT NULL,
  `create_time` timestamp NULL DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
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参考下方的链接有两种方式；

这里使用单独的转换器代码如下

import io.debezium.spi.converter.CustomConverter;
import io.debezium.spi.converter.RelationalColumn;
import org.apache.kafka.connect.data.SchemaBuilder;

import java.time.*;
import java.time.format.DateTimeFormatter;
import java.util.Properties;

/**
 * mysql日期字段时区/格式处理
 * @author JGMa
 */
public class MySqlDateTimeConverter implements CustomConverter<SchemaBuilder, RelationalColumn> {

    private DateTimeFormatter dateFormatter = DateTimeFormatter.ISO_DATE;

    private DateTimeFormatter timeFormatter = DateTimeFormatter.ISO_TIME;

    private DateTimeFormatter datetimeFormatter = DateTimeFormatter.ISO_DATE_TIME;

    private DateTimeFormatter timestampFormatter = DateTimeFormatter.ISO_DATE_TIME;

    private ZoneId timestampZoneId = ZoneId.systemDefault();

    @Override
    public void configure(Properties props) {

    }

    @Override
    public void converterFor(RelationalColumn column, ConverterRegistration<SchemaBuilder> registration) {

        String sqlType = column.typeName().toUpperCase();

        SchemaBuilder schemaBuilder = null;

        Converter converter = null;

        if ("DATE".equals(sqlType)) {

            schemaBuilder = SchemaBuilder.string().optional().name("com.darcytech.debezium.date.string");

            converter = this::convertDate;

        }

        if ("TIME".equals(sqlType)) {

            schemaBuilder = SchemaBuilder.string().optional().name("com.darcytech.debezium.time.string");

            converter = this::convertTime;

        }

        if ("DATETIME".equals(sqlType)) {

            schemaBuilder = SchemaBuilder.string().optional().name("com.darcytech.debezium.datetime.string");

            converter = this::convertDateTime;


        }

        if ("TIMESTAMP".equals(sqlType)) {

            schemaBuilder = SchemaBuilder.string().optional().name("com.darcytech.debezium.timestamp.string");

            converter = this::convertTimestamp;

        }

        if (schemaBuilder != null) {

            registration.register(schemaBuilder, converter);

        }

    }


    private String convertDate(Object input) {

        if (input == null) {
            return null;
        }

        if (input instanceof LocalDate) {

            return dateFormatter.format((LocalDate) input);

        }

        if (input instanceof Integer) {

            LocalDate date = LocalDate.ofEpochDay((Integer) input);

            return dateFormatter.format(date);

        }

        return String.valueOf(input);

    }


    private String convertTime(Object input) {

        if (input == null) {
            return null;
        }

        if (input instanceof Duration) {

            Duration duration = (Duration) input;

            long seconds = duration.getSeconds();

            int nano = duration.getNano();

            LocalTime time = LocalTime.ofSecondOfDay(seconds).withNano(nano);

            return timeFormatter.format(time);

        }

        return String.valueOf(input);

    }


    private String convertDateTime(Object input) {

        if (input == null) {
            return null;
        }

        if (input instanceof LocalDateTime) {

            return datetimeFormatter.format((LocalDateTime) input).replaceAll("T", " ");

        }

        return String.valueOf(input);

    }


    private String convertTimestamp(Object input) {

        if (input == null) {
            return null;
        }

        if (input instanceof ZonedDateTime) {

            // mysql的timestamp会转成UTC存储，这里的zonedDatetime都是UTC时间

            ZonedDateTime zonedDateTime = (ZonedDateTime) input;

            LocalDateTime localDateTime = zonedDateTime.withZoneSameInstant(timestampZoneId).toLocalDateTime();

            return timestampFormatter.format(localDateTime).replaceAll("T", " ");

        }
        return String.valueOf(input);
    }
}
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使用

{

    public static void main(String[] args) {
        String tableName = "temp_flink";
        String srcHost = "192.168.10.14";
        String srcDatabase = "xcode";
        String srcUsername = "root";
        String srcPassword = "123456";
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        env.setRuntimeMode(RuntimeExecutionMode.STREAMING);

        Properties mysqlProperties = new Properties();
//        mysqlProperties.setProperty("characterEncoding","UTF-8");
//        mysqlProperties.setProperty("connectionTimeZone","Asia/Shanghai");
        //自定义时间转换配置
        mysqlProperties.setProperty("converters", "dateConverters");
        mysqlProperties.setProperty("dateConverters.type", "com.txlc.flink.core.MySqlDateTimeConverter");

        MySqlSource<String> mySqlSource = MySqlSource.<String>builder()
                .hostname(srcHost)
//                .jdbcProperties(mysqlProperties)
                .port(3306)
                .databaseList(srcDatabase)
                .tableList(srcDatabase + "." + tableName)
                .username(srcUsername)
                .password(srcPassword)
//                .serverTimeZone("Asia/Shanghai")
// 主要是这里
                .debeziumProperties(mysqlProperties)
                .deserializer(new JsonStringDebeziumDeserializationSchema())
                .build();

        DataStreamSource<String> streamSource = env.fromSource(mySqlSource, WatermarkStrategy.forMonotonousTimestamps(), "[temp_flink-source]")
                .setParallelism(1);

        streamSource.addSink(StarRocksSink.sink(
                // the sink options
                StarRocksSinkOptions.builder()
                        .withProperty("jdbc-url", "jdbc:mysql://192.168.10.245:9030?characterEncoding=utf-8")
                        .withProperty("load-url", "192.168.10.245:8030")
                        .withProperty("database-name", "xcode")
                        .withProperty("username", "root")
                        .withProperty("password", "123456")
                        .withProperty("table-name", tableName)
                        // 自 2.4 版本，支持更新主键模型中的部分列。您可以通过以下两个属性指定需要更新的列。
                        // .withProperty("sink.properties.partial_update", "true")
                        // .withProperty("sink.properties.columns", "k1,k2,k3")
                        .withProperty("sink.properties.format", "json")
                        .withProperty("sink.properties.strip_outer_array", "true")
                        // 设置并行度，多并行度情况下需要考虑如何保证数据有序性
                        .withProperty("sink.parallelism", "1")
                        .build())
        ).name(">>>StarRocks temp_flink Sink<<<");

        try {
            env.execute("temp_flink stream sync");
        } catch (Exception e) {
            e.printStackTrace();
            log.error("[sync error] info : {}", e);
        }


    }

}
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参考资料
https://blog.csdn.net/cloudbigdata/article/details/122935333
https://blog.csdn.net/WuBoooo/article/details/127387144