flink 1.10 Sql方式读取kafka

Love The Way You Lie 2022-11-22 12:59 139阅读 0赞

## ddl模式 ##

import org.apache.flink.streaming.api.scala._
    import org.apache.flink.table.api.Table
    import org.apache.flink.table.api.scala._
    
    
        val env: StreamExecutionEnvironment = StreamExecutionEnvironment.getExecutionEnvironment
        val tableEnv: StreamTableEnvironment = StreamTableEnvironment.create(env)
    
        val createTableSql =
          """CREATE TABLE user_log( | | id string, | timestam string, | user_info ROW(user_id string, name string ), | jsonArray ARRAY<ROW(user_id222 STRING, name222 STRING)> |) WITH ( | 'connector.type' = 'kafka', | 'connector.version' = 'universal', | 'connector.topic' = 'qiang', | 'connector.properties.bootstrap.servers' = '47.92.117.90:9092', | 'connector.startup-mode' = 'latest-offset', | 'format.fail-on-missing-field' = 'false', | 'format.type' = 'json' | ) """.stripMargin
    
        tableEnv.sqlUpdate(createTableSql)
        val table: Table = tableEnv.sqlQuery("select id, cast (timestam as bigint) as tm ,user_info.user_id from user_log")
    
        tableEnv.createTemporaryView("temp_table",table)
    
        val table1: Table = tableEnv.sqlQuery("select id from temp_table")

## scala模式 ##

import org.apache.flink.streaming.api.scala._
    import org.apache.flink.table.api._
    import org.apache.flink.table.api.scala._
    import org.apache.flink.table.descriptors._
    
    val env: StreamExecutionEnvironment = StreamExecutionEnvironment.getExecutionEnvironment
    val tableEnv: StreamTableEnvironment = StreamTableEnvironment.create(env)
    
    tableEnv.connect(
         new Kafka()
           .version("universal")
           .topic("qiang")
           .startFromLatest()
           .property("bootstrap.servers", "47.92.117.90:9092")
           .property("group.id", "flink-kafka")
       ).withFormat(
         // new Json().failOnMissingField(false)
         new Csv().ignoreParseErrors().fieldDelimiter(',')
       ).withSchema(
         new Schema()
           .field("id", DataTypes.STRING()).field("age", DataTypes.STRING())
       ).inAppendMode()
         .createTemporaryTable("kafkaInputTable")
    
    val table: Table = tableEnv.sqlQuery("select id,age from kafkaInputTable"

## pom.xml ##

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>com.jq</groupId>
        <artifactId>flinkTutorial</artifactId>
        <version>1.0</version>
    
        <dependencies>
            <dependency>
                <groupId>org.apache.flink</groupId>
                <artifactId>flink-scala_2.12</artifactId>
                <version>1.10.1</version>
            </dependency>
            <dependency>
                <groupId>org.apache.flink</groupId>
                <artifactId>flink-streaming-scala_2.12</artifactId>
                <version>1.10.1</version>
            </dependency>
    
            <dependency>
                <groupId>org.apache.flink</groupId>
                <artifactId>flink-connector-kafka_2.12</artifactId>
                <version>1.10.1</version>
            </dependency>
    
    
            <dependency>
                <groupId>org.apache.flink</groupId>
                <artifactId>flink-connector-kafka_2.12</artifactId>
                <version>1.10.1</version>
            </dependency>
    
            <dependency>
                <groupId>org.apache.bahir</groupId>
                <artifactId>flink-connector-redis_2.11</artifactId>
                <version>1.0</version>
            </dependency>
    
            <dependency>
                <groupId>org.apache.flink</groupId>
                <artifactId>flink-jdbc_2.12</artifactId>
                <version>1.10.1</version>
            </dependency>
    
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.44</version>
            </dependency>
    
            <dependency>
                <groupId>org.apache.flink</groupId>
                <artifactId>flink-table-planner_2.12</artifactId>
                <version>1.10.1</version>
            </dependency>
    
    
    
    
    
    
    
    
    
    
    
    
    
            <dependency>
                <groupId>org.apache.flink</groupId>
                <artifactId>flink-csv</artifactId>
                <version>1.10.1</version>
            </dependency>
            <dependency>
                <groupId>org.apache.flink</groupId>
                <artifactId>flink-json</artifactId>
                <version>1.10.1</version>
            </dependency>
        </dependencies>
    
        <build>
            <plugins> 
                <plugin>
                    <groupId>net.alchim31.maven</groupId>
                    <artifactId>scala-maven-plugin</artifactId>
                    <version>3.4.6</version>
                    <executions>
                        <execution> 
                            <goals>
                                <goal>compile</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-assembly-plugin</artifactId>
                    <version>3.0.0</version>
                    <configuration>
                        <descriptorRefs>
                            <descriptorRef>jar-with-dependencies</descriptorRef>
                        </descriptorRefs>
                    </configuration>
                    <executions>
                        <execution>
                            <id>make-assembly</id>
                            <phase>
                                package
                            </phase>
                            <goals>
                                <goal>single</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>
            </plugins>
        </build>
    
    </project>