这里不展开zookeeper、kafka安装配置 (1)首先需要启动zookeeper和kafka (2)定义一个kafka生产者 package com.producers; import com.alibaba.fastjson.JSONObject; import com.pojo.Event
接下来,我们需要编写 Flink SQL 任务,从 Kafka 中消费数据。以下是使用 Flink SQL 的示例代码: importorg.apache.flink.streaming.api.environment.StreamExecutionEnvironment;importorg.apache.flink.table.api.EnvironmentSettings;importorg.apache.flink.table.api.TableEnvironment;publicclassFlinkKafkaToMySQL{publicstati...
开始--> 创建Flink应用 --> 读取Kafka数据 --> 转换数据 --> 写入MySQL --> 结束 二、代码示例 1. 创建Flink应用 首先,在你的Flink项目中引入相关依赖,如下所示: <dependency><groupId>org.apache.flink</groupId><artifactId>flink-connector-kafka_2.11</artifactId><version>1.13.2</version></dependen...
executeSql("CREATE TABLE WaterSensor (" + "id STRING," + "ts BIGINT," + "vc BIGINT," + // "`pt` TIMESTAMP(3),"+ // "WATERMARK FOR pt AS pt - INTERVAL '10' SECOND" + "pt as PROCTIME() " + ") WITH (" + "'connector' = 'kafka'," + "'topic' = 'kafka_data_water...
(4)从kafka接入数据,并写入到mysql public static void main(String[] args) throws Exception { StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(); env.setParallelism(1); StreamTableEnvironment tableEnv = StreamTableEnvironment.create(env); //读取kafka的数据 Properties prope...
（1）首先需要启动zookeeper和kafka （2）定义一个kafka生产者 ```java package com.producers;import com.alibaba.fastjson.JSONObject;import com.pojo.Event;import com.pojo.WaterSensor;import org.apache.kafka.clients.producer.KafkaProducer;import org.apache.kafka.clients.producer.ProducerRecord;import org....
insert into rds_test_table2 select * from kafka_test_table2 ; 6.Flink WebUI 登录Flink WebUI页面,查看任务是否启动成功 点击查看任务是否报错 如果出现The server time zone value ‘�й���ʱ��’ is unrecognized or represents more than one time zone。在MySQL的url连接字符串中添...
运行一个从 Kafka 读取数据,计算 PVUV,并写入 MySQL 的作业 设置调优参数,观察对作业的影响 SqlSubmit 的实现 笔者一开始是想用 SQL Client 来贯穿整个演示环节,但可惜 1.9 版本 SQL CLI 还不支持处理 CREATE TABLE 语句。所以笔者就只好自己写了个简单的提交脚本。后来想想,也挺好的,可以让听众同时了解如何通过...
好了,到了关键的FlinkSQL了,该如何写呢? 首先看看Source,也就是我们的Kafka,如下: CREATE TABLE t_student (id INT,name STRING) WITH ('connector' = 'kafka','topic' = 'cdc_user','properties.bootstrap.servers' = '10.194.166.92:9092','properties.group.id' = 'flink-cdc-mysql-kafka','scan....
(7)FlinkSQL将kafka数据写入到mysql方式二 public static void main(String[] args) throws Exception { StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(); env.setParallelism(1); StreamTableEnvironment tableEnv = StreamTableEnvironment.create(env);...