项目实战从 0 到 1 学习之Flink （24）Flink将kafka的数据存到redis中

1、依赖

<properties>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
       <flink.version>1.7.2</flink.version>
       <slf4j.version>1.7.7</slf4j.version>
       <log4j.version>1.2.17</log4j.version>
       <scala.version>2.11.8</scala.version>
    </properties>
  <dependencies>
            <!-- https://mvnrepository.com/artifact/org.apache.flink/flink-java -->
            <dependency>
                <groupId>org.apache.flink</groupId>
                <artifactId>flink-java</artifactId>
                <version>${flink.version}</version>
            </dependency>

            <!-- https://mvnrepository.com/artifact/org.apache.flink/flink-streaming-java -->
            <dependency>
                <groupId>org.apache.flink</groupId>
                <artifactId>flink-streaming-java_2.11</artifactId>
                <version>${flink.version}</version>
            </dependency>

            <!-- https://mvnrepository.com/artifact/org.apache.flink/flink-scala -->
            <dependency>
                <groupId>org.apache.flink</groupId>
                <artifactId>flink-scala_2.11</artifactId>
                <version>${flink.version}</version>
            </dependency>

            <!-- https://mvnrepository.com/artifact/org.apache.flink/flink-streaming-scala -->
            <dependency>
                <groupId>org.apache.flink</groupId>
                <artifactId>flink-streaming-scala_2.11</artifactId>
                <version>${flink.version}</version>
            </dependency>

            <!-- https://mvnrepository.com/artifact/org.apache.bahir/flink-connector-redis -->
            <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-connector-kafka-0.11_2.11</artifactId>
                <version>${flink.version}</version>
            </dependency>

            <dependency>
                <groupId>org.apache.flink</groupId>
                <artifactId>flink-connector-filesystem_2.11</artifactId>
                <version>1.7.2</version>
            </dependency>

            <!--alibaba fastjson-->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>fastjson</artifactId>
                <version>1.2.51</version>
            </dependency>

            <!--******************* 日志 *******************-->
            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
                <version>${slf4j.version}</version>
                <scope>runtime</scope>
            </dependency>

            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>${log4j.version}</version>
                <scope>runtime</scope>
            </dependency>
            <!--******************* kafka *******************-->
            <dependency>
                <groupId>org.apache.kafka</groupId>
                <artifactId>kafka-clients</artifactId>
                <version>0.11.0.2</version>
            </dependency>
  </dependencies>

2、代码实现一：

//1.创建StreamExecutionEnvironment
val env=StreamExecutionEnvironment.getExecutionEnvironment
val props=new Properties()
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,"CentOS:9092")
props.put(ConsumerConfig.GROUP_ID_CONFIG,"g1")

val kafkaConsumer=new FlinkKafkaConsumer("topic01",new SimpleStringSchema(),props)
val redisConfig=new FlinkJedisPoolConfig.Builder()
.setHost("CentOS")
.setPort(6379)
.build()

val redisSink= new RedisSink(redisConfig,new WordPairRedisMapper)
//2.设置Source
val lines:DataStream[String]=env.addSource[String](kafkaConsumer)
lines.flatMap(_.split("\s+"))
.map((_,1))
.keyBy(0)
.sum(1)
.addSink(redisSink)
//4.执行任务
env.execute("wordcount")
package com.baizhi.demo03

import org.apache.flink.streaming.connectors.redis.common.mapper.{RedisCommand, RedisCommandDescription, RedisMapper}

class WordPairRedisMapper extends RedisMapper[(String,Int)]{
  override def getCommandDescription: RedisCommandDescription = {
    new RedisCommandDescription(RedisCommand.HSET,"clicks")
  }
  override def getKeyFromData(t: (String, Int)): String = {
    t._1
  }

  override def getValueFromData(t: (String, Int)): String = {
    t._2.toString
  }
}

 3、代码实现二：

package ryx;


import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import org.apache.flink.api.common.serialization.SimpleStringSchema;
import org.apache.flink.streaming.api.CheckpointingMode;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.datastream.DataStreamSource;
import org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator;
import org.apache.flink.streaming.api.environment.CheckpointConfig;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.api.functions.co.CoFlatMapFunction;
import org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer011;
import org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducer011;
import org.apache.flink.streaming.util.serialization.KeyedSerializationSchemaWrapper;
import org.apache.flink.util.Collector;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import ryx.source.MyRedisSource;

import java.util.HashMap;
import java.util.Properties;

public class DataClean {
    private static Logger logger= LoggerFactory.getLogger(DataClean.class);
    public static void main(String[] args) throws Exception {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

        //checkpoint配置
        env.enableCheckpointing(60000);
        env.getCheckpointConfig().setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
        env.getCheckpointConfig().setMinPauseBetweenCheckpoints(30000);
        env.getCheckpointConfig().setCheckpointTimeout(10000);
        env.getCheckpointConfig().setMaxConcurrentCheckpoints(1);
        env.getCheckpointConfig().enableExternalizedCheckpoints(CheckpointConfig.ExternalizedCheckpointCleanup.RETAIN_ON_CANCELLATION);

        //设置statebackend

        //env.setStateBackend(new RocksDBStateBackend("hdfs://hadoop100:9000/flink/checkpoints",true));

        String topicS="allData";

        Properties prop = new Properties();
        prop.setProperty("group.id", "cleanData");
        prop.setProperty("bootstrap.servers","hadoop01:9092,hadoop02:9092,hadoop03:9092");

        FlinkKafkaConsumer011<String> myConsumer = new FlinkKafkaConsumer011<String>(topicS, new SimpleStringSchema(), prop);
        //读取kafka中的数据
        /**
        *{"dt":"2019-10-10 16:45:32","countryCode":"US","data":[{"type":"s5","score":0.5,"level":"B"},{"type":"s1","score":0.8,"level":"B"}]}
        *{"dt":"2019-10-10 16:45:34","countryCode":"HK","data":[{"type":"s5","score":0.5,"level":"A"},{"type":"s3","score":0.3,"level":"D"}]}
        *{"dt":"2019-10-10 16:45:36","countryCode":"KW","data":[{"type":"s1","score":0.1,"level":"B"},{"type":"s4","score":0.2,"level":"A"}]}
        *{"dt":"2019-10-10 16:45:38","countryCode":"HK","data":[{"type":"s2","score":0.2,"level":"A+"},{"type":"s3","score":0.1,"level":"C"}]}
        */
        DataStreamSource<String> data = env.addSource(myConsumer);
        //这里是前面的博客的----flink从redis中获取数据作为source源
        DataStreamSource<HashMap<String, String>> mapData = env.addSource(new MyRedisSource());

        DataStream<String> resData = data.connect(mapData).flatMap(new CoFlatMapFunction<String, HashMap<String, String>, String>() {
            //存储国家和大区的映射关系
            private HashMap<String, String> allMap = new HashMap<String, String>();
            //flatMap1处理获取kafka中的数据
            public void flatMap1(String value, Collector<String> out) throws Exception {
                JSONObject jsonObject = JSONObject.parseObject(value);
                String dt = jsonObject.getString("dt");
                String area = jsonObject.getString("countryCode");
                logger.info("获取的时间戳为：" + dt + "---获取的国家为: " + area);
                System.out.println("获取的时间戳为：" + dt + "---获取的国家为: " + area);
                //获取大区的
                String ar = allMap.get(area);
                JSONArray jsonArr = jsonObject.getJSONArray("data");
                logger.info("获取的json字符串的data大小为：" + jsonArr.size()+"ar:"+ar);
                for (int i = 0; i < jsonArr.size(); i++) {

                    JSONObject jsonOb = jsonArr.getJSONObject(i);
                    logger.info("获取的data的json数组的数据为" + jsonOb);
                    jsonOb.put("area", ar);
                    jsonOb.put("dt", dt);
                    out.collect(jsonOb.toJSONString());
                    System.out.println("获取的Json字符串为：" + jsonOb.toJSONString());
                }
            }

            //flatMap2处理获取redis中的数据
            public void flatMap2(HashMap<String, String> value, Collector<String> out) throws Exception {
                this.allMap=value;
            }
        });
        String outTopic="allDataClean";
        Properties outProp = new Properties();
        outProp.setProperty("bootstrap.servers","hadoop01:9092,hadoop02:9092,hadoop03:9092");
        //设置事务超市时间
        outProp.setProperty("transaction.timeout.ms",60000*15+"");
        FlinkKafkaProducer011<String> writeKafka = new FlinkKafkaProducer011<String>(outTopic, new KeyedSerializationSchemaWrapper<String>(new SimpleStringSchema()), outProp, FlinkKafkaProducer011.Semantic.EXACTLY_ONCE);
        resData.addSink(writeKafka);
        env.execute("DataCLean");
    }
}

结果：
key:AREA_USvalueUS
key:AREA_CTvalueTW,HK
key:AREA_ARvaluePK,KW,SA
key:AREA_INvalueIN
获取的时间戳为：2019-10-10 16:45:38—获取的国家为: HK
获取的Json字符串为：{“area”:“AREA_CT”,“dt”:“2019-10-10 16:45:38”,“score”:0.2,“level”:“A+”,“type”:“s2”}
获取的Json字符串为：{“area”:“AREA_CT”,“dt”:“2019-10-10 16:45:38”,“score”:0.1,“level”:“C”,“type”:“s3”}
获取的时间戳为：2019-10-10 16:45:40—获取的国家为: KW
获取的Json字符串为：{“area”:“AREA_AR”,“dt”:“2019-10-10 16:45:40”,“score”:0.2,“level”:“A+”,“type”:“s3”}
获取的Json字符串为：{“area”:“AREA_AR”,“dt”:“2019-10-10 16:45:40”,“score”:0.2,“level”:“A+”,“type”:“s5”}
获取的时间戳为：2019-10-10 16:45:42—获取的国家为: US
获取的Json字符串为：{“area”:“AREA_US”,“dt”:“2019-10-10 16:45:42”,“score”:0.2,“level”:“D”,“type”:“s3”}
获取的Json字符串为：{“area”:“AREA_US”,“dt”:“2019-10-10 16:45:42”,“score”:0.2,“level”:“C”,“type”:“s4”}
key:AREA_USvalueUS
key:AREA_CTvalueTW,HK
key:AREA_ARvaluePK,KW,SA
key:AREA_INvalueIN
获取的时间戳为：2019-10-10 16:45:44—获取的国家为: IN
获取的Json字符串为：{“area”:“AREA_IN”,“dt”:“2019-10-10 16:45:44”,“score”:0.2,“level”:“A”,“type”:“s1”}
获取的Json字符串为：{“area”:“AREA_IN”,“dt”:“2019-10-10 16:45:44”,“score”:0.2,“level”:“B”,“type”:“s1”}
获取的时间戳为：2019-10-10 16:45:46—获取的国家为: US
获取的Json字符串为：{“area”:“AREA_US”,“dt”:“2019-10-10 16:45:46”,“score”:0.5,“level”:“A”,“type”:“s5”}
获取的Json字符串为：{“area”:“AREA_US”,“dt”:“2019-10-10 16:45:46”,“score”:0.8,“level”:“C”,“type”:“s3”}

图片：
在这里插入图片描述

作者：大码王

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原文地址：https://www.cnblogs.com/huanghanyu/p/13633123.html