一、Flink 专栏
Flink 专栏系统介绍某一知识点,并辅以具体的示例进行说明。
1、Flink 部署系列
本部分介绍Flink的部署、配置相关基础内容。
2、Flink基础系列
本部分介绍Flink 的基础部分,比如术语、架构、编程模型、编程指南、基本的datastream api用法、四大基石等内容。
3、Flik Table API和SQL基础系列
本部分介绍Flink Table Api和SQL的基本用法,比如Table API和SQL创建库、表用法、查询、窗口函数、catalog等等内容。
4、Flik Table API和SQL提高与应用系列
本部分是table api 和sql的应用部分,和实际的生产应用联系更为密切,以及有一定开发难度的内容。
5、Flink 监控系列
本部分和实际的运维、监控工作相关。
二、Flink 示例专栏
Flink 示例专栏是 Flink 专栏的辅助说明,一般不会介绍知识点的信息,更多的是提供一个一个可以具体使用的示例。本专栏不再分目录,通过链接即可看出介绍的内容。
两专栏的所有文章入口点击:Flink 系列文章汇总索引
本文介绍了将table api管道加入datastream。
如果需要了解更多内容,可以在本人Flink 专栏中了解更新系统的内容。
本文除了maven依赖外,没有其他依赖。
更多详细内容参考文章:
21、Flink 的table API与DataStream API 集成(完整版)
<properties>
<encoding>UTF-8</encoding>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<java.version>1.8</java.version>
<scala.version>2.12</scala.version>
<flink.version>1.17.0</flink.version>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-clients</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-java</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-table-common</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-streaming-java</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-table-api-java-bridge</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-sql-gateway</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-csv</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-json</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.flink/flink-table-planner -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-table-planner_2.12</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.flink/flink-table-api-java-uber -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-table-api-java-uber</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-table-runtime</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-connector-jdbc</artifactId>
<version>3.1.0-1.17</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.flink/flink-connector-hive -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-connector-hive_2.12</artifactId>
<version>1.17.0</version>
</dependency>
<dependency>
<groupId>org.apache.hive</groupId>
<artifactId>hive-exec</artifactId>
<version>3.1.2</version>
</dependency>
<!-- flink连接器 -->
<!-- https://mvnrepository.com/artifact/org.apache.flink/flink-connector-kafka -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-connector-kafka</artifactId>
<version>${flink.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.flink/flink-sql-connector-kafka -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-sql-connector-kafka</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-compress -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-compress</artifactId>
<version>1.24.0</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.2</version>
<!-- <scope>provided</scope> -->
</dependency>
</dependencies>
单个Flink作业可以由多个相邻运行的断开连接的管道组成。
Table API中定义的Source-to-sink管道可以作为一个整体附加到StreamExecutionEnvironment,并在调用DataStream API中的某个执行方法时提交。
源不一定是table source,也可以是以前转换为Table API的另一个DataStream管道。因此,可以将 table sinks用于DataStream API程序。
通过使用StreamTableEnvironment.createStatementSet()创建的专用StreamStatementSet实例可以使用该功能。通过使用语句集,planner 可以一起优化所有添加的语句,并在调用StreamStatement set.attachAsDataStream()时提供一个或多个添加到StreamExecutionEnvironment的端到端管道( end-to-end pipelines)。
下面的示例演示如何将表程序添加到一个作业中的DataStream API程序。
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.api.functions.sink.DiscardingSink;
import org.apache.flink.table.api.DataTypes;
import org.apache.flink.table.api.Schema;
import org.apache.flink.table.api.Table;
import org.apache.flink.table.api.TableDescriptor;
import org.apache.flink.table.api.bridge.java.StreamStatementSet;
import org.apache.flink.table.api.bridge.java.StreamTableEnvironment;
/**
* @author alanchan
*
*/
public class TestTablePipelinesToDataStreamDemo {
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
StreamTableEnvironment tenv = StreamTableEnvironment.create(env);
StreamStatementSet statementSet = tenv.createStatementSet();
// 建立数据源
TableDescriptor sourceDescriptor =
TableDescriptor.forConnector("datagen")
.option("number-of-rows", "3")
.schema(
Schema.newBuilder()
.column("myCol", DataTypes.INT())
.column("myOtherCol", DataTypes.BOOLEAN())
.build())
.build();
// 建立sink
TableDescriptor sinkDescriptor = TableDescriptor.forConnector("print").build();
// add a pure Table API pipeline
Table tableFromSource = tenv.from(sourceDescriptor);
statementSet.add(tableFromSource.insertInto(sinkDescriptor));
// use table sinks for the DataStream API pipeline
DataStream<Integer> dataStream = env.fromElements(1, 2, 3);
Table tableFromStream = tenv.fromDataStream(dataStream);
statementSet.add(tableFromStream.insertInto(sinkDescriptor));
// attach both pipelines to StreamExecutionEnvironment (the statement set will be cleared after calling this method)
statementSet.attachAsDataStream();
// define other DataStream API parts
env.fromElements(4, 5, 6).addSink(new DiscardingSink<>());
// use DataStream API to submit the pipelines
env.execute();
// 1> +I[287849559, true]
// +I[1]
// +I[2]
// +I[3]
// 3> +I[-1058230612, false]
// 2> +I[-995481497, false]
}
}
以上,本文介绍了将table api管道加入datastream。