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由于文件比较多，这里只是将部分目录截图出来，全套包含大厂面经、学习笔记、源码讲义、实战项目、大纲路线、讲解视频，并且后续会持续更新
需要这份系统化资料的朋友，可以戳这里获取
public void setEventType(String eventType) {
this.eventType = eventType;
}
public Long getEventTime() {
return eventTime;
}
public void setEventTime(Long eventTime) {
this.eventTime = eventTime;
}
public LoginEvent(int userId, String ip, String eventType, Long eventTime) {
this.userId = userId;
this.ip = ip;
this.eventType = eventType;
this.eventTime = eventTime;
}
@Override
public String toString() {
return "LoginEvent{" +
"userId=" + userId +
", ip='" + ip + '\'' +
", eventType='" + eventType + '\'' +
", eventTime=" + eventTime +
'}';
}
}
}
### 2.监控市场价格 需求： 物价局和工商局会监督市场上各种商品得销售价格，随着市场行情和商品供需得变化，商品价格会有一定程度得浮动，如果商品价格在指定得价格区间波动，政府部门是不会干预的额，如果商品价格在一定的时间范围内波动幅度超出了指定的区间范围，并且上行幅度过大，物价局会上报敏感数据信息，并规范市场价格。 在此，我们假定如果商品售价在1分钟之内有连续两次超过预定商品价格阀值就发送告警信息。 测试数据
{“goodsId”:100001,“goodsPrice”:6,“goodsName”:“apple”,“alias”:“苹果”,“orderTime”:1558430843000}
{“goodsId”:100007,“goodsPrice”:0.5,“goodsName”:“mask”,“alias”:“口罩”,“orderTime”:1558430844000}
{“goodsId”:100002,“goodsPrice”:2,“goodsName”:“rice”,“alias”:“大米”,“orderTime”:1558430845000}
{“goodsId”:100003,“goodsPrice”:2,“goodsName”:“flour”,“alias”:“面粉”,“orderTime”:1558430846000}
{“goodsId”:100004,“goodsPrice”:12,“goodsName”:“rice”,“alias”:“大米”,“orderTime”:1558430847000}
{“goodsId”:100005,“goodsPrice”:20,“goodsName”:“apple”,“alias”:“苹果”,“orderTime”:1558430848000}
{“goodsId”:100006,“goodsPrice”:3,“goodsName”:“banana”,“alias”:“香蕉”,“orderTime”:1558430849000}
{“goodsId”:100007,“goodsPrice”:10,“goodsName”:“mask”,“alias”:“口罩”,“orderTime”:1558430850000}
{“goodsId”:100001,“goodsPrice”:16,“goodsName”:“apple”,“alias”:“苹果”,“orderTime”:1558430852000}
{“goodsId”:100007,“goodsPrice”:15,“goodsName”:“mask”,“alias”:“口罩”,“orderTime”:1558430853000}
{“goodsId”:100002,“goodsPrice”:12,“goodsName”:“rice”,“alias”:“大米”,“orderTime”:1558430854000}
{“goodsId”:100003,“goodsPrice”:12,“goodsName”:“flour”,“alias”:“面粉”,“orderTime”:1558430855000}
{“goodsId”:100004,“goodsPrice”:12,“goodsName”:“rice”,“alias”:“大米”,“orderTime”:1558430856000}
{“goodsId”:100005,“goodsPrice”:20,“goodsName”:“apple”,“alias”:“苹果”,“orderTime”:1558430857000}
{“goodsId”:100006,“goodsPrice”:13,“goodsName”:“banana”,“alias”:“香蕉”,“orderTime”:1558430858000}
{“goodsId”:100007,“goodsPrice”:10,“goodsName”:“mask”,“alias”:“口罩”,“orderTime”:1558430859000}
创建kafka topic
./kafka-topics.sh --create --topic cep --zookeeper node01:2181 --partitions 1 --replication-factor 1
生产数据
./kafka-console-producer.sh --broker-list node01:9092 --topic cep
redis保存限制价格 jedisCluster.hset(“product”,“apple”,“10”); jedisCluster.hset(“product”,“rice”,“6”); jedisCluster.hset(“product”,“flour”,“6”); jedisCluster.hset(“product”,“banana”,“8”); jedisCluster.hset(“product”,“mask”,“5”); 开发步骤 在test源码目录下创建测试类：cn.itcast.CepMarkets 1.获取流处理执行环境 2.设置事件时间、并行度 整合kafka 4.数据转换 5.process获取bean,设置status，并设置事件时间 6.定义匹配模式，设置时间长度 7.匹配模式（分组） 8.查询告警数据 2.1.代码开发
public class CepMarkets {
public static void main(String[] args) throws Exception {
//1.获取流处理执行环境
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
env.setParallelism(1);
//2.设置事件时间
env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);
//3.整合kafka
Properties properties = new Properties();
properties.setProperty("bootstrap.servers", "node01:9092"); //broker地址
properties.setProperty("group.id", "cep"); //消费组
properties.setProperty("enable.auto.commit", "true");
properties.setProperty("auto.commit.interval.ms", "5000");
FlinkKafkaConsumer011 kafkaConsumer = new FlinkKafkaConsumer011<>("cep", new SimpleStringSchema(), properties);
kafkaConsumer.setStartFromEarliest();
DataStreamSource source = env.addSource(kafkaConsumer);
//4.数据转换
SingleOutputStreamOperator mapData = source.map(new MapFunction() {
@Override
public Product map(String value) throws Exception {
JSONObject json = JSON.parseObject(value);
Product product = new Product(
json.getLong("goodsId"),
json.getDouble("goodsPrice"),
json.getString("goodsName"),
json.getString("alias"),
json.getLong("orderTime"),
false
);
return product;
}
});
//5.保留告警数据(设置时间)
SingleOutputStreamOperator waterData = mapData.keyBy(Product::getGoodsId)
.process(new KeyedProcessFunction() {
Map map = null;
@Override
public void open(Configuration parameters) throws Exception {
JedisCluster jedisCluster = RedisUtil.getJedisCluster();
map = jedisCluster.hgetAll("product");
}
@Override
public void processElement(Product value, Context ctx, Collector out) throws Exception {
long priceAlert = Long.parseLong(map.get(value.getGoodsName()));
if (value.getGoodsPrice() > priceAlert) {
value.setStatus(true);
}
out.collect(value);
}
})
.assignTimestampsAndWatermarks(new BoundedOutOfOrdernessTimestampExtractor(Time.seconds(0)) {
@Override
public long extractTimestamp(Product element) {
return element.getOrderTime();
}
})
;
//6.定义匹配模式，设置时间长度
Pattern pattern = Pattern.begin("begin")
.where(new SimpleCondition() {
@Override
public boolean filter(Product value) throws Exception {
return value.getStatus() == true;
}
})
.next("next")
.where(new SimpleCondition() {
@Override
public boolean filter(Product value) throws Exception {
return value.getStatus() == true;
}
})
.within(Time.seconds(60));
//7.匹配模式（分组）
PatternStream cep = CEP.pattern(waterData.keyBy(Product::getGoodsId), pattern);
//8.查询告警数据
cep.select(new PatternSelectFunction() {
@Override
public Object select(Map> pattern) throws Exception {
List result = pattern.get("next");
return result;
}
}).print("告警数据：");
env.execute();
}
}
2.2.Bean对象
属性：goodsId、goodsPrice、goodsName、alias、orderTime、status
public class Product {
private Long goodsId;
private Double goodsPrice;
private String goodsName;
private String alias;
private Long orderTime;
private Boolean status;
public Product(Long goodsId, Double goodsPrice, String goodsName, String alias, Long orderTime, Boolean status) {
this.goodsId = goodsId;
this.goodsPrice = goodsPrice;
this.goodsName = goodsName;
this.alias = alias;
this.orderTime = orderTime;
this.status = status;
}
@Override
public String toString() {
return "Product{" +
"goodsId=" + goodsId +
", goodsPrice=" + goodsPrice +
", goodsName='" + goodsName + '\'' +
", alias='" + alias + '\'' +
", orderTime=" + orderTime +
", status=" + status +
'}';
}
public Long getGoodsId() {
return goodsId;
}
public void setGoodsId(Long goodsId) {
this.goodsId = goodsId;
}
public Double getGoodsPrice() {
return goodsPrice;
}
public void setGoodsPrice(Double goodsPrice) {
this.goodsPrice = goodsPrice;
}
public String getGoodsName() {
return goodsName;
}
public void setGoodsName(String goodsName) {
this.goodsName = goodsName;
}
public String getAlias() {
return alias;
}
public void setAlias(String alias) {
this.alias = alias;
}
public Long getOrderTime() {
return orderTime;
既有适合小白学习的零基础资料，也有适合3年以上经验的小伙伴深入学习提升的进阶课程，涵盖了95%以上大数据知识点，真正体系化！
由于文件比较多，这里只是将部分目录截图出来，全套包含大厂面经、学习笔记、源码讲义、实战项目、大纲路线、讲解视频，并且后续会持续更新
需要这份系统化资料的朋友，可以戳这里获取
[外链图片转存中…(img-LIZTQw3o-1715726852898)]
[外链图片转存中…(img-8utSNZ8Z-1715726852898)]
既有适合小白学习的零基础资料，也有适合3年以上经验的小伙伴深入学习提升的进阶课程，涵盖了95%以上大数据知识点，真正体系化！
由于文件比较多，这里只是将部分目录截图出来，全套包含大厂面经、学习笔记、源码讲义、实战项目、大纲路线、讲解视频，并且后续会持续更新
需要这份系统化资料的朋友，可以戳这里获取