基于Spark Streaming对新闻网站项目案例分析

r囧r小猫 2022-12-29 07:00 251阅读 0赞

### 目录 ###

*   *  一、需求分析
     *  二、数据准备
     *   *  （1）数据格式
         *  （2）基于Java开发实时数据生成器
     *  三、实施过程

## 一、需求分析 ##

新闻网站需求：

*  pv
 *  uv
 *  注册用户数
 *  热门板块

数据处理流程：

数据源  -> kafka  ->  spark streaming

## 二、数据准备 ##

### （1）数据格式 ###

**网站日志格式 ：**

date,timestamp,userid,pageid,section,action

**日志字段说明:**

date: 日期，yyyy-MM-dd格式 
    timestamp: 时间戳 
    userid: 用户id 
    pageid: 页面id 
    section: 版块 
    action: 用户行为，两类，点击页面和注册

**数据展示：**

2020-12-20 1608451521565 364 422 fashion view
    2020-12-20 1608451521565 38682 708 aviation view
    2020-12-20 1608451521565 65444 270 internet view
    2020-12-20 1608451521565 4805 250 tv-show view
    2020-12-20 1608451521565 1130 743 movie view
    2020-12-20 1608451521565 85320 605 carton view
    2020-12-20 1608451521565 null 581 movie view
    2020-12-20 1608451521565 null null null register

kafka消费者启动：

bin/kafka-console-consumer.sh --bootstrap-server bigdata-pro-m04:9092 --topic spark

### （2）基于Java开发实时数据生成器 ###

这里生成的实时数据流，生成的传递给kafka，每隔1秒随机生成1000条数据。

package com.kfk.spark.news_analysis_project;
    
    import org.apache.kafka.clients.producer.KafkaProducer;
    import org.apache.kafka.clients.producer.Producer;
    import org.apache.kafka.clients.producer.ProducerRecord;
    
    import java.text.SimpleDateFormat;
    import java.util.Date;
    import java.util.Properties;
    import java.util.Random;
    
    /** * 访问日志Kafka Producer * @author : 蔡政洁 * @email :caizhengjie888@icloud.com * @date : 2020/12/12 * @time : 7:51 下午 */
    public class AccessProducer extends Thread{ 
    
        private static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
        private static String date;
    
        // 版块内容
        private static String[] sections = new String[] { "country", "international", "sport",
                "entertainment", "movie", "carton",
                "tv-show", "technology", "internet",
                "car", "military", "funny",
                "fashion", "aviation", "government"};
    
        private static Random random = new Random();
    
        private static int[] newOldUserArr = new int[]{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
    
        private Producer<String,String> producer;
        private String topic;
    
        /** * 构造函数 * @param topic */
        public AccessProducer(String topic){ 
            this.topic = topic;
            producer = new KafkaProducer<String, String>(createProducerConfig());
            date = simpleDateFormat.format(new Date());
        }
    
        /** * createProducerConfig * @return */
        public Properties createProducerConfig(){ 
            Properties properties = new Properties();
            properties.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
            properties.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
            properties.put("bootstrap.servers", "bigdata-pro-m04:9092");
            return properties;
        }
    
        @Override
        public void run(){ 
            int counter = 0;
    
            while (true){ 
                // 生成1000条访问数据
                for (int i = 0;i < 1000;i++){ 
                    String log = null;
    
                    // 生成条访问数据
                    if (newOldUserArr[random.nextInt(10)] == 1){ 
                        log = getAccessLog();
                    } else { 
                        log = getRegisterLog();
                    }
    
                    // 将数据发送给kafka
                    producer.send(new ProducerRecord<String, String>(topic,log));
    
                    counter++;
                    if (counter == 100){ 
                        counter = 0;
                        try { 
                            Thread.sleep(1000);
                        } catch (InterruptedException e) { 
                            e.printStackTrace();
                        }
                    }
                }
            }
        }
    
        /** * 生成注册数据 * @return */
        private static String getRegisterLog(){ 
    
            StringBuffer stringBuffer = new StringBuffer("");
    
            // 生成时间戳
            long timestamp = System.currentTimeMillis();
    
            // 随机生成userid（默认1000注册用户，每天1/10的访客是未注册用户）
            Long userid = 0L;
            int newOldUser = newOldUserArr[random.nextInt(10)];
            if (newOldUser == 1){ 
                userid = null;
            } else { 
                userid = (long)random.nextInt(100000);
            }
    
            // 随机生成pageid，共1000个页面
            long pageid = random.nextInt(1000);
    
            // 随机生成板块
            String section = sections[random.nextInt(sections.length)];
    
            // 生成固定的行为，view
            String action = "view";
    
            return stringBuffer.append(date).append(" ")
                    .append(timestamp).append(" ")
                    .append(userid).append(" ")
                    .append(pageid).append(" ")
                    .append(section).append(" ")
                    .append(action).toString();
        }
    
        /** * 生成访问数据 * @return */
        private static String getAccessLog(){ 
    
            StringBuffer stringBuffer = new StringBuffer("");
    
            // 生成时间戳
            long timestamp = System.currentTimeMillis();
    
            // 新用户都是userid为null
            Long userid = null;
    
            // 生成随机pageid，都是null
            Long pageid = null;
    
            // 生成随机版块，都是null
            String section = null;
    
            // 生成固定的行为，view
            String action = "register";
    
            return stringBuffer.append(date).append(" ")
                    .append(timestamp).append(" ")
                    .append(userid).append(" ")
                    .append(pageid).append(" ")
                    .append(section).append(" ")
                    .append(action).toString();
        }
    
        public static void main(String[] args) { 
            AccessProducer accessProducer = new AccessProducer("spark");
            accessProducer.start();
        }
    }

## 三、实施过程 ##

将每一个需求写入到一个方法中，运行流程分析及结果以注释的形式显示。  
关于数据模型，可以参考基于Spark SQL对新闻网站项目案例分析这篇文章  
[https://blog.csdn.net/weixin\_45366499/article/details/111119234][https_blog.csdn.net_weixin_45366499_article_details_111119234]

package com.kfk.spark.common;
    
    import org.apache.spark.SparkConf;
    import org.apache.spark.streaming.Durations;
    import org.apache.spark.streaming.api.java.JavaStreamingContext;
    
    /** * @author : 蔡政洁 * @email :caizhengjie888@icloud.com * @date : 2020/12/14 * @time : 8:23 下午 */
    public class CommStreamingContext { 
    
        public static JavaStreamingContext getJssc(){ 
            SparkConf conf = new SparkConf().setMaster("local[2]").setAppName("CommStreamingContext");
            return new JavaStreamingContext(conf, Durations.seconds(5));
        }
    }

package com.kfk.spark.news_analysis_project;
    
    import com.kfk.spark.common.CommStreamingContext;
    import org.apache.kafka.clients.consumer.ConsumerRecord;
    import org.apache.kafka.common.serialization.StringDeserializer;
    import org.apache.spark.api.java.JavaRDD;
    import org.apache.spark.api.java.function.Function;
    import org.apache.spark.api.java.function.Function2;
    import org.apache.spark.api.java.function.PairFunction;
    import org.apache.spark.streaming.api.java.JavaDStream;
    import org.apache.spark.streaming.api.java.JavaInputDStream;
    import org.apache.spark.streaming.api.java.JavaPairDStream;
    import org.apache.spark.streaming.api.java.JavaStreamingContext;
    import org.apache.spark.streaming.kafka010.ConsumerStrategies;
    import org.apache.spark.streaming.kafka010.KafkaUtils;
    import org.apache.spark.streaming.kafka010.LocationStrategies;
    import scala.Tuple2;
    
    import java.util.*;
    
    /** * @author : 蔡政洁 * @email :caizhengjie888@icloud.com * @date : 2020/12/20 * @time : 4:11 下午 */
    public class NewsRealTime { 
    
        /** * input data: * 2020-12-20 1608451521565 364 422 fashion view * 2020-12-20 1608451521565 38682 708 aviation view * ... * @param args */
        public static void main(String[] args) throws InterruptedException { 
    
            JavaStreamingContext jssc = CommStreamingContext.getJssc();
    
            // sparkstreaming与kafka连接
            Map<String, Object> kafkaParams = new HashMap<>();
            kafkaParams.put("bootstrap.servers", "bigdata-pro-m04:9092");
            kafkaParams.put("key.deserializer", StringDeserializer.class);
            kafkaParams.put("value.deserializer", StringDeserializer.class);
            kafkaParams.put("group.id", "streaming_kafka_1");
            kafkaParams.put("auto.offset.reset", "latest");
            kafkaParams.put("enable.auto.commit", false);
    
            // 设置topic
            Collection<String> topics = Collections.singletonList("spark");
    
            // kafka数据源
            JavaInputDStream<ConsumerRecord<String, String>> stream =
                    KafkaUtils.createDirectStream(
                            jssc,
                            LocationStrategies.PreferConsistent(),
                            ConsumerStrategies.<String, String>Subscribe(topics, kafkaParams)
                    );
    
            /** * stream -> map -> JavaDStream */
            JavaDStream<String> accessDstream = stream.map(new Function<ConsumerRecord<String, String>, String>() { 
                @Override
                public String call(ConsumerRecord<String, String> v1) throws Exception { 
                    return v1.value();
                }
            });
    
            /** * accessDStream -> filter -> action(view) */
            JavaDStream<String> filterDstream = accessDstream.filter(new Function<String, Boolean>() { 
                @Override
                public Boolean call(String v1) throws Exception { 
    
                    String[] lines = v1.split(" ");
                    String action = lines[5];
                    String actionValue = "view";
                    if (actionValue.equals(action)){ 
                        return true;
                    } else { 
                        return false;
                    }
                }
            });
    
            // 求网页的pv
            calculatePagePV(filterDstream);
    
            // 求网页的uv
            calculatePageUV(filterDstream);
    
            // 求注册用户数
            calculateRegistercount(accessDstream);
    
            // 求热门板块
            calculateUserSectionPV(accessDstream);
    
            jssc.start();
            jssc.awaitTermination();
    
        }
    
        /** * 求网页的pv * input data: * 2020-12-20 1608451521565 364 422 fashion view * * 数据演化过程： * filterDstream -> mapToPair -> <2020-12-20_422,1> -> reduceByKey -> <2020-12-20_422,5> * * @param filterDstream */
        public static void calculatePagePV(JavaDStream<String> filterDstream){ 
    
            /** * filterDstream -> mapToPair -> <2020-12-20_422,1> */
            JavaPairDStream<String,Integer> pairDstream = filterDstream.mapToPair(new PairFunction<String, String, Integer>() { 
                @Override
                public Tuple2<String,Integer> call(String lines) throws Exception { 
                    String[] line = lines.split(" ");
                    return new Tuple2<String,Integer>(line[0] + "_" + line[3], 1);
                }
            });
    
            /** * pairDstream -> reduceByKey -> <2020-12-20_422,5> */
            JavaPairDStream<String,Integer> pvStream = pairDstream.reduceByKey(new Function2<Integer, Integer, Integer>() { 
                @Override
                public Integer call(Integer v1, Integer v2) throws Exception { 
                    return v1+v2;
                }
            });
    
            pvStream.print();
    
            /** * (2020-12-21_16,1) * (2020-12-21_548,1) * (2020-12-21_881,1) * (2020-12-21_27,1) * (2020-12-21_771,1) * (2020-12-21_344,2) * (2020-12-21_313,1) * (2020-12-21_89,1) * (2020-12-21_14,1) * (2020-12-21_366,1) * ... */
        }
    
        /** * 求网页的uv * input data: * 2020-12-20 1608451521565 364 422 fashion view * 2020-12-20 1608451521565 364 422 fashion view * 2020-12-20 1608451521565 365 422 fashion view * 2020-12-20 1608451521565 366 422 fashion view * 2020-12-20 1608451521565 367 422 fashion view * 2020-12-20 1608451521565 367 453 fashion view * * 数据演化过程： * 第一步：map * (2020-12-20,364,422) * (2020-12-20,364,422) * (2020-12-20,365,422) * (2020-12-20,366,422) * (2020-12-20,367,422) * (2020-12-20,367,453) * * 第二步：rdd -> distinct * (2020-12-20,364,422) * (2020-12-20,365,422) * (2020-12-20,366,422) * (2020-12-20,367,422) * (2020-12-20,367,453) * * 第三步：mapToPair * <2020-12-20_422,1> * <2020-12-20_422,1> * <2020-12-20_422,1> * <2020-12-20_422,1> * <2020-12-20_453,1> * * 第四步：reduceByKey * <2020-12-20_422,4> * <2020-12-20_453,1> * * @param filterDstream */
        public static void calculatePageUV(JavaDStream<String> filterDstream){ 
    
            /** * filterDstream -> map -> (2020-12-20,364,422) */
            JavaDStream<String> mapDstream = filterDstream.map(new Function<String, String>() { 
                @Override
                public String call(String lines) throws Exception { 
                    String[] line = lines.split(" ");
                    return line[0] + "," + line[2] + "," + line[3];
                }
            });
    
            /** * mapDstream -> distinct */
            JavaDStream<String> distinctDstream = mapDstream.transform(new Function<JavaRDD<String>, JavaRDD<String>>() { 
                @Override
                public JavaRDD<String> call(JavaRDD<String> lines) throws Exception { 
                    return lines.distinct();
                }
            });
    
            /** * distinctDstream -> mapToPair -> <2020-12-20_422,1> */
            JavaPairDStream<String,Integer> pairDstream = distinctDstream.mapToPair(new PairFunction<String, String, Integer>() { 
                @Override
                public Tuple2<String, Integer> call(String lines) throws Exception { 
                    String[] line = lines.split(",");
                    return new Tuple2<>(line[0] + "_" + line[2], 1);
                }
            });
    
            /** * pairDstream -> reduceByKey -> <2020-12-20_422,4> */
            JavaPairDStream<String,Integer> uvStream = pairDstream.reduceByKey(new Function2<Integer, Integer, Integer>() { 
                @Override
                public Integer call(Integer v1, Integer v2) throws Exception { 
                    return v1+v2;
                }
            });
    
            uvStream.print();
    
            /** * (2020-12-21_492,1) * (2020-12-21_85,2) * (2020-12-21_18,1) * (2020-12-21_27,2) * (2020-12-21_825,1) * (2020-12-21_366,1) * (2020-12-21_89,1) * (2020-12-21_14,2) * (2020-12-21_69,1) * (2020-12-21_188,1) * ... */
    
        }
    
        /** * 求注册用户数:过滤出action=register的数据就可以 * input data: * 2020-12-20 1608451521565 364 422 fashion view * * 数据演化过程： * accessDStream -> filter -> action(register) -> mapToPair -> reduceByKey * * @param accessDstream */
        public static void calculateRegistercount(JavaDStream<String> accessDstream){ 
    
            /** * accessDStream -> filter -> action(register) */
            JavaDStream<String> filterDstream = accessDstream.filter(new Function<String, Boolean>() { 
                @Override
                public Boolean call(String v1) throws Exception { 
    
                    String[] lines = v1.split(" ");
                    String action = lines[5];
                    String actionValue = "register";
                    if (actionValue.equals(action)){ 
                        return true;
                    } else { 
                        return false;
                    }
                }
            });
    
    
            /** * filterDstream -> mapToPair -> <2020-12-20_register,1> */
            JavaPairDStream<String,Integer> pairDstream = filterDstream.mapToPair(new PairFunction<String, String, Integer>() { 
                @Override
                public Tuple2<String,Integer> call(String lines) throws Exception { 
                    String[] line = lines.split(" ");
                    return new Tuple2<String,Integer>(line[0] + "_" + line[5], 1);
                }
            });
    
            /** * pairDstream -> reduceByKey -> <2020-12-20_register,5> */
            JavaPairDStream<String,Integer> registerCountStream = pairDstream.reduceByKey(new Function2<Integer, Integer, Integer>() { 
                @Override
                public Integer call(Integer v1, Integer v2) throws Exception { 
                    return v1+v2;
                }
            });
    
            registerCountStream.print();
    
            /** * (2020-12-21_register,11) */
        }
    
        /** * 求出热门板块 * input data: * 2020-12-20 1608451521565 364 422 fashion view * * 数据演化过程： * filterDstream -> mapToPair -> <2020-12-20_fashion,1> -> reduceByKey -> <2020-12-20_fashion,5> * * @param filterDstream */
        public static void calculateUserSectionPV(JavaDStream<String> filterDstream){ 
    
            /** * filterDstream -> mapToPair -> <2020-12-20_fashion,1> */
            JavaPairDStream<String,Integer> pairDstream = filterDstream.mapToPair(new PairFunction<String, String, Integer>() { 
                @Override
                public Tuple2<String,Integer> call(String lines) throws Exception { 
                    String[] line = lines.split(" ");
                    return new Tuple2<String,Integer>(line[0] + "_" + line[4], 1);
                }
            });
    
            /** * pairDstream -> reduceByKey -> <2020-12-20_fashion,5> */
            JavaPairDStream<String,Integer> pvStream = pairDstream.reduceByKey(new Function2<Integer, Integer, Integer>() { 
                @Override
                public Integer call(Integer v1, Integer v2) throws Exception { 
                    return v1+v2;
                }
            });
    
            pvStream.print();
    
            /** * (2020-12-21_internet,16) * (2020-12-21_military,24) * (2020-12-21_aviation,21) * (2020-12-21_carton,19) * (2020-12-21_government,25) * (2020-12-21_tv-show,19) * (2020-12-21_country,14) * (2020-12-21_movie,13) * (2020-12-21_international,16) * ... */
    
        }
    }

这里没有做过多的业务分析，可以根据前面所学的知识进行扩展，将算子灵活运用组合起来！

--------------------

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[https_blog.csdn.net_weixin_45366499_article_details_111119234]: https://blog.csdn.net/weixin_45366499/article/details/111119234