flinksql kafka到mysql累计指标练习

flinksql 累计指标练习

数据流向：kafka ->kafka ->mysql

模拟写数据到kafka topic：wxt中

java 复制代码

import com.alibaba.fastjson.JSONObject;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerRecord;
import java.util.Properties;

public class KafkaProducerExample {
    public static void main(String[] args) throws Exception {
        // 设置kafka服务器地址和端口号
        String kafkaServers = "localhost:9092";

        // 设置producer属性
        Properties properties = new Properties();
        properties.put("bootstrap.servers", kafkaServers);
        properties.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
        properties.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");

        // 创建Kafka producer对象
        KafkaProducer<String, String> producer = new KafkaProducer<>(properties);

        // 发送消息
        String topic = "wxt";
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("id", 9);
        jsonObject.put("name", "王大大");
        jsonObject.put("age", 11);

        // 将JSON对象转换成字符串
        String jsonString = jsonObject.toString();

        // 输出JSON字符串
        System.out.println("JSON String: " + jsonString);
        ProducerRecord<String, String> record = new ProducerRecord<>(topic, jsonString);
        producer.send(record);

        // 关闭producer
        producer.close();
    }
}

kafka topic ：wxt1

java 复制代码

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.table.api.EnvironmentSettings;
import org.apache.flink.table.api.TableEnvironment;


public class KafkaToMysqlJob {

    public static void main(String[] args) throws Exception {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        EnvironmentSettings settings = EnvironmentSettings.newInstance().useBlinkPlanner().inStreamingMode().build();
        TableEnvironment tEnv = TableEnvironment.create(settings);

        // 定义Kafka连接属性
        String kafkaBootstrapServers = "localhost:9092";
        String kafkaTopic = "wxt";
        String groupId = "wxt1";

        // 注册Kafka表
        tEnv.executeSql("CREATE TABLE kafka_table (\n" +
                "  id INT,\n" +
                "  name STRING,\n" +
                "  age INT,\n" +
                "  proctime as PROCTIME()\n" +
                ") WITH (\n" +
                "  'connector' = 'kafka',\n" +
                "  'topic' = '" + kafkaTopic + "',\n" +
                "  'properties.bootstrap.servers' = '" + kafkaBootstrapServers + "',\n" +
                "  'properties.group.id' = '" + groupId + "',\n" +
                "  'format' = 'json',\n" +
                "  'scan.startup.mode' = 'earliest-offset'\n" +
                ")");

        // 注册Kafka表
        // latest-offset
        //earliest-offset
        tEnv.executeSql("CREATE TABLE kafka_table2 (\n" +
                "  window_start STRING,\n" +
                "  window_end STRING,\n" +
                "  name STRING,\n" +
                "  age INT\n" +
                ") WITH (\n" +
                "  'connector' = 'kafka',\n" +
                "  'topic' = 'wxt2',\n" +
                "  'properties.bootstrap.servers' = '" + kafkaBootstrapServers + "',\n" +
                "  'properties.group.id' = 'kafka_table2',\n" +
                "  'format' = 'json',\n" +
                "  'scan.startup.mode' = 'latest-offset',\n" +
                "  'value.format' = 'csv'\n" +
                ")");


        tEnv.executeSql("CREATE TABLE mysql_sink_table (\n" +
                "  window_start String,\n" +
                "   window_end String,\n" +
                "    name String,\n" +
                "    age INT\n" +
                ") WITH (\n" +
                "   'connector' = 'jdbc',\n" +
                "   'url' = 'jdbc:mysql://localhost:3306/tests?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=UTF-8',\n" +
                "   'username' = 'root',\n" +
                "   'password' = '12345678',\n" +
                "   'table-name' = 'leiji_age'\n" +
                ")");

         tEnv.executeSql("insert into kafka_table2 select cast(window_start as string) as window_start,cast(window_end as string) as window_end,name,sum(age) as age\n" +
                 "from TABLE( CUMULATE( TABLE kafka_table, DESCRIPTOR(proctime), INTERVAL '20' SECOND, INTERVAL '1' DAY))\n" +
                 "group by  window_start,window_end,name");

        tEnv.executeSql("insert into mysql_sink_table select window_start,window_end,name,age from kafka_table2");

        env.execute("KafkaToMysqlJob");
    }
}

kafka topic :wxt2

mysql结果数据：

pom文件

xml 复制代码

<?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>org.example</groupId>
    <artifactId>flinksql</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <scala.binary.version>2.12</scala.binary.version>
        <flink.version>1.14.3</flink.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-table-api-java-bridge_${scala.binary.version}</artifactId>
            <version>${flink.version}</version>
            <!-- <scope>provided</scope>-->
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-table-planner_${scala.binary.version}</artifactId>
            <version>${flink.version}</version>
            <!-- <scope>provided</scope>-->
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-streaming-scala_${scala.binary.version}</artifactId>
            <version>${flink.version}</version>
            <!-- <scope>provided</scope>-->
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-table-common</artifactId>
            <version>${flink.version}</version>
            <!-- <scope>provided</scope>-->
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-clients_${scala.binary.version}</artifactId>
            <version>${flink.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.22</version>
            <scope>provided</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.73</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.7.15</version>
        </dependency>

        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-csv</artifactId>
            <version>${flink.version}</version>
        </dependency>

        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-json</artifactId>
            <version>${flink.version}</version>
        </dependency>

        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-json</artifactId>
            <version>${flink.version}</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.7.15</version>
        </dependency>

        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-math3</artifactId>
            <version>3.5</version>
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-connector-kafka_${scala.binary.version}</artifactId>
            <version>${flink.version}</version>
        </dependency>

        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-connector-jdbc_2.11</artifactId>
            <version>${flink.version}</version>
        </dependency>
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <version>8.0.31</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.38</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/commons-io/commons-io -->
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.11.0</version>
        </dependency>

        <dependency>
            <groupId>org.antlr</groupId>
            <artifactId>antlr-runtime</artifactId>
            <version>3.5.2</version>
        </dependency>


        <dependency>
            <groupId>org.apache.thrift</groupId>
            <artifactId>libfb303</artifactId>
            <version>0.9.3</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.7.15</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.7</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
            <scope>runtime</scope>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.5.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>3.1.1</version>
                <configuration>
                    <!-- put your configurations here -->
                </configuration>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <version>2.10</version>
                <executions>
                    <execution>
                        <id>copy-dependencies</id>
                        <phase>package</phase>
                        <goals>
                            <goal>copy-dependencies</goal>
                        </goals>
                        <configuration>
                            <outputDirectory>${project.build.directory}/lib</outputDirectory>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.scala-tools</groupId>
                <artifactId>maven-scala-plugin</artifactId>
                <version>2.15.2</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>compile</goal>
                            <goal>testCompile</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>