scala 实现flinkcdc
时间: 2023-09-02 11:05:57 浏览: 47
在Scala中实现Flink CDC的示例代码如下所示:
```scala
import org.apache.flink.streaming.api.scala.StreamExecutionEnvironment
import com.alibaba.ververica.cdc.connectors.mysql.MySQLSource
import com.alibaba.ververica.cdc.connectors.mysql.table.StartupOptions
import com.alibaba.ververica.cdc.debezium.StringDebeziumDeserializationSchema
import org.apache.flink.streaming.api.scala._
object MyFlinkCDC {
def main(args: Array[String]): Unit = {
val env = StreamExecutionEnvironment.getExecutionEnvironment
// 使用MySQLSource创建数据源
// 同时指定StringDebeziumDeserializationSchema,将CDC转换为String类型输出
val sourceFunction = MySQLSource.builder()
.hostname("hadoop102")
.port(3306)
.username("root")
.password("123456")
.databaseList("test01")
.tableList("test01.student")
.deserializer(new StringDebeziumDeserializationSchema)
.startupOptions(StartupOptions.latest)
.build()
// 单并行度打印,避免输出乱序
env.addSource(sourceFunction).print.setParallelism(1)
env.execute()
}
}
```
在pom.xml文件中添加Flink CDC的依赖如下所示:
```xml
<dependency>
<groupId>com.alibaba.ververica</groupId>
<artifactId>flink-connector-mysql-cdc</artifactId>
<version>1.1.0</version>
</dependency>
```
这个示例代码使用了Flink CDC连接器来读取MySQL数据源,并将CDC转换为字符串类型输出。同时,通过指定数据库和表名,可以选择性地读取特定的数据。最后,通过设置单个并行度打印,可以避免输出乱序。添加相应的依赖后,你可以在Scala项目中使用这个示例来实现Flink CDC的功能。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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