湖仓一体电商项目(十九):业务实现之编写写入DWS层业务代码
业务实现之编写写入DWS层业务代码
DWS层主要是存放大宽表数据,此业务中主要是针对Kafka topic “KAFKA-DWD-BROWSE-LOG-TOPIC”中用户浏览商品日志数据关联HBase中“ODS_PRODUCT_CATEGORY”商品分类表与“ODS_PRODUCT_INFO”商品表维度数据获取浏览商品主题大宽表。
Flink在读取Kafka 用户浏览商品数据与HBase中维度数据进行关联时采用了Redis做缓存,这样可以加快处理数据的速度。获取用户主题宽表之后,将数据写入到Iceberg-DWS层中,另外将宽表数据结果写入到Kafka 中方便后期做实时统计分析。
一、代码编写
具体代码参照“ProduceBrowseLogToDWS.scala”,大体代码逻辑如下:
object ProduceBrowseLogToDWS {
private val hbaseDimProductCategoryTbl: String = ConfigUtil.HBASE_DIM_PRODUCT_CATEGORY
private val hbaseDimProductInfoTbl: String = ConfigUtil.HBASE_DIM_PRODUCT_INFO
private val kafkaDwsBrowseLogWideTopic: String = ConfigUtil.KAFKA_DWS_BROWSE_LOG_WIDE_TOPIC
private val kafkaBrokers: String = ConfigUtil.KAFKA_BROKERS
def main(args: Array[String]): Unit = {
//1.准备环境
val env: StreamExecutionEnvironment = StreamExecutionEnvironment.getExecutionEnvironment
val tblEnv: StreamTableEnvironment = StreamTableEnvironment.create(env)
env.enableCheckpointing(5000)
import org.apache.flink.streaming.api.scala._
/**
* 1.需要预先创建 Catalog
* 创建Catalog,创建表需要在Hive中提前创建好,不在代码中创建,因为在Flink中创建iceberg表不支持create table if not exists ...语法
*/
tblEnv.executeSql(
"""
|create catalog hadoop_iceberg with (
| 'type'='iceberg',
| 'catalog-type'='hadoop',
| 'warehouse'='hdfs://mycluster/lakehousedata'
|)
""".stripMargin)
/**
* 2.创建 Kafka Connector,连接消费Kafka dwd中数据
* {
* "browseProductCode": "BviQsxHtxC",
* "browseProductTpCode": "282",
* "userIp": "5.189.85.33",
* "obtainPoints": "38",
* "userId": "uid250775",
* "frontProductUrl": "https:///swdOX/ruh",
* "kafka_dwd_topic": "KAFKA-DWD-BROWSE-LOG-TOPIC",
* "logTime": "1647067452241",
* "browseProductUrl": "https:///57/zB4oF"
* }
*/
tblEnv.executeSql(
"""
|create table kafka_dwd_browse_log_tbl (
| logTime string,
| userId string,
| userIp string,
| frontProductUrl string,
| browseProductUrl string,
| browseProductTpCode string,
| browseProductCode string,
| obtainPoints string
|) with (
| 'connector' = 'kafka',
| 'topic' = 'KAFKA-DWD-BROWSE-LOG-TOPIC',
| 'properties.bootstrap.servers'='node1:9092,node2:9092,node3:9092',
| 'scan.startup.mode'='earliest-offset', --也可以指定 earliest-offset 、latest-offset
| 'properties.group.id' = 'my-group-id',
| 'format' = 'json'
|)
""".stripMargin)
val browseLogTbl:Table = tblEnv.sqlQuery(
"""
| select logTime,userId,userIp,frontProductUrl,browseProductUrl,browseProductTpCode,browseProductCode,obtainPoints from kafka_dwd_browse_log_tbl
""".stripMargin)
//3.将Row 类型数据转换成对象类型操作,方便与维度数据进行关联
val browseLogDS: DataStream[BrowseLog] = tblEnv.toAppendStream[Row](browseLogTbl).map(row=>{
val logTime: String = row.getField(0).toString//浏览日志时间
val userId: String = row.getField(1).toString//用户编号
val userIp: String = row.getField(2).toString//浏览IP地址
val frontProductUrl: String = row.getField(3).toString//跳转前URL地址,有为null,有的不为null
val browseProductUrl: String = row.getField(4).toString//浏览商品URL
val browseProductTpCode: String = row.getField(5).toString//浏览商品二级分类
val browseProductCode: String = row.getField(6).toString//浏览商品编号
val obtainPointsstring: String = row.getField(7).toString//浏览商品所获积分
BrowseLog(logTime,userId,userIp,frontProductUrl,browseProductUrl,browseProductTpCode,browseProductCode,obtainPointsstring)
})
//4.设置Sink 到Kafka 数据输出到侧输出流标记
val kafkaDataTag = new OutputTag[JSONObject]("kafka_data")
//5.连接phoenix 库查询HBase数据组织Browse宽表
val browseLogWideInfoDS: DataStream[BrowseLogWideInfo] = browseLogDS.process(new ProcessFunction[BrowseLog,BrowseLogWideInfo] {
var conn: Connection = _
var pst: PreparedStatement = _
var rs: ResultSet = _
//创建Phoenix 连接
override def open(parameters: Configuration): Unit = {
//连接Phoenix
println(s"连接Phoenix ... ...")
conn = DriverManager.getConnection(ConfigUtil.PHOENIX_URL)
}
override def processElement(browseLog: BrowseLog, context: ProcessFunction[BrowseLog, BrowseLogWideInfo]#Context, collector: Collector[BrowseLogWideInfo]): Unit ={
//最终返回的json 对象
val jsonObj = new JSONObject()
jsonObj.put("log_time", browseLog.logTime)
jsonObj.put("user_id", browseLog.userId)
jsonObj.put("user_ip", browseLog.userIp)
jsonObj.put("front_product_url", browseLog.frontProductUrl)
jsonObj.put("browse_product_url", browseLog.browseProductUrl)
jsonObj.put("browse_product_tpcode", browseLog.browseProductTpCode) //商品类型id
jsonObj.put("browse_product_code", browseLog.browseProductCode)//商品id
jsonObj.put("obtain_points", browseLog.obtainPoints)
//根据浏览商品类型id : browse_product_tpcode 从Redis缓存中读取 DIM_PRODUCT_CATEGORY - 商品类别表
val productCategoryRedisCacheInfo: String = MyRedisUtil.getInfoFromRedisCache(hbaseDimProductCategoryTbl, browseLog.browseProductTpCode)
//根据浏览商品id : browse_product_code 从Redis缓存中读取 DIM_PRODUCT_INFO - 商品基本信息表
val productInfoRedisCacheInfo: String = MyRedisUtil.getInfoFromRedisCache(hbaseDimProductInfoTbl, browseLog.browseProductCode)
//商品种类数据如果 Redis 缓存中没有则读取phoenix获取,有则直接从缓存中获取
if (MyStringUtil.isEmpty(productCategoryRedisCacheInfo)) {
//说明缓存中没有数据,从phoenix中查询
println("连接Phoenix查询 DIM_PRODUCT_CATEGORY - 商品类别表 维度数据")
val sql =
s"""
|SELECT
| b.id as first_category_id,
| b.name AS first_category_name,
| a.id as second_category_id,
| a.name AS second_category_name
|FROM DIM_PRODUCT_CATEGORY a JOIN DIM_PRODUCT_CATEGORY b ON a.p_id = b.id where a.id = '${browseLog.browseProductTpCode}'
""".stripMargin
println("phoenix 执行SQL 如下: "+sql)
pst = conn.prepareStatement(sql)
rs = pst.executeQuery()
//准备 向Redis 中写入 DIM_PRODUCT_CATEGORY - 商品类别表 的json对象
val dimProductCategroyRedisJsonObj = new JSONObject()
while (rs.next()) {
dimProductCategroyRedisJsonObj.put("first_category_id", rs.getString("first_category_id"))
dimProductCategroyRedisJsonObj.put("first_category_name", rs.getString("first_category_name"))
dimProductCategroyRedisJsonObj.put("second_category_id", rs.getString("second_category_id"))
dimProductCategroyRedisJsonObj.put("second_category_name", rs.getString("second_category_name"))
//将商品种类信息存入Redis缓存,向Redis中设置数据缓存
MyRedisUtil.setRedisDimCache(hbaseDimProductCategoryTbl, browseLog.browseProductTpCode, dimProductCategroyRedisJsonObj.toString)
//将json 加入到总返回结果的Json中
CommonUtil.AddAttributeToJson(jsonObj, dimProductCategroyRedisJsonObj)
}
}else{
//Redis中查询到了数据,从redis 中获取 json 信息设置在最终结果中
println("DIM_PRODUCT_CATEGORY - 商品类别表 从Redis中获取到缓存处理")
CommonUtil.AddAttributeToJson(jsonObj, JSON.parseObject(productCategoryRedisCacheInfo))
}
//商品信息数据如果 Redis 缓存中没有则读取phoenix获取,有则直接从缓存中获取
if (MyStringUtil.isEmpty(productInfoRedisCacheInfo)) {
//说明缓存中没有数据,从phoenix中查询
println("连接Phoenix查询 DIM_PRODUCT_INFO - 商品基本信息表 维度数据")
val sql =
s"""
|SELECT
| product_id,
| product_name
|FROM DIM_PRODUCT_INFO where product_id = '${browseLog.browseProductCode}'
""".stripMargin
println("phoenix 执行SQL 如下: "+sql)
pst = conn.prepareStatement(sql)
rs = pst.executeQuery()
//准备 向Redis 中写入 DIM_PRODUCT_INFO - 商品基本信息表 的json对象
val dimProductInfoRedisJsonObj = new JSONObject()
while (rs.next()) {
dimProductInfoRedisJsonObj.put("product_id", rs.getString("product_id"))
dimProductInfoRedisJsonObj.put("product_name", rs.getString("product_name"))
//将商品种类信息存入Redis缓存,向Redis中设置数据缓存
MyRedisUtil.setRedisDimCache(hbaseDimProductInfoTbl, browseLog.browseProductCode, dimProductInfoRedisJsonObj.toString)
//将json 加入到总返回结果的Json中
CommonUtil.AddAttributeToJson(jsonObj, dimProductInfoRedisJsonObj)
}
}else{
//Redis中查询到了数据,从redis 中获取 json 信息设置在最终结果中
println("DIM_PRODUCT_INFO - 商品基本信息表 从Redis中获取到缓存处理")
CommonUtil.AddAttributeToJson(jsonObj, JSON.parseObject(productInfoRedisCacheInfo))
}
//准备向Kafka 中存储的数据json 对象
context.output(kafkaDataTag,jsonObj)
//最终返回 jsonObj,此时jsonObj包含了所有json 信息
/**
* {
* "first_category_id": "30",
* "user_ip": "195.134.35.113",
* "obtain_points": "0",
* "product_name": "扭扭车",
* "log_time": "2022-03-17 16:22:09",
* "browse_product_tpcode": "30000",
* "front_product_url": "https://0BZ/7N/qVIap",
* "first_category_name": "玩具乐器",
* "user_id": "uid786601",
* "browse_product_code": "xA4cfipkdl",
* "product_id": "xA4cfipkdl",
* "second_category_id": "30000",
* "browse_product_url": "https://DU6S2wiT/n/l3E",
* "second_category_name": "童车童床"
* }
*/
collector.collect(BrowseLogWideInfo(jsonObj.getString("log_time").split(" ")(0),jsonObj.getString("user_id"),jsonObj.getString("user_ip"),
jsonObj.getString("product_name"),jsonObj.getString("front_product_url"),jsonObj.getString("browse_product_url"),jsonObj.getString("first_category_name"),
jsonObj.getString("second_category_name"),jsonObj.getString("obtain_points")))
}
override def close(): Unit = {
rs.close()
pst.close()
conn.close()
}
})
/**
* 6.将清洗完的数据存入Iceberg 表中
* 将宽表转换成表存储在 iceberg - DWS 层 DWS_BROWSE_INFO ,
*/
val table: Table = tblEnv.fromDataStream(browseLogWideInfoDS)
tblEnv.executeSql(
s"""
|insert into hadoop_iceberg.icebergdb.DWS_BROWSE_INFO
|select
| log_time,
| user_id,
| user_ip,
| product_name,
| front_product_url,
| browse_product_url,
| first_category_name,
| second_category_name,
| obtain_points
| from ${table}
""".stripMargin)
//7.同时将结果存储在Kafka KAFKA-DWS-BROWSE-LOG-WIDE-TOPIC topic中
/**
* 将以上数据写入到Kafka 各自DWD 层topic中,这里不再使用SQL方式,而是直接使用DataStream代码方式 Sink 到各自的DWD层代码中
*/
val props = new Properties()
props.setProperty("bootstrap.servers",kafkaBrokers)
browseLogWideInfoDS.getSideOutput(kafkaDataTag).addSink(new FlinkKafkaProducer[JSONObject](kafkaDwsBrowseLogWideTopic,new KafkaSerializationSchema[JSONObject] {
override def serialize(jsonObj: JSONObject, timestamp: java.lang.Long): ProducerRecord[Array[Byte], Array[Byte]] = {
new ProducerRecord[Array[Byte], Array[Byte]](kafkaDwsBrowseLogWideTopic,null,jsonObj.toString.getBytes())
}
},props,FlinkKafkaProducer.Semantic.AT_LEAST_ONCE))
env.execute()
}
}
二、创建Iceberg-DWS层表
代码在执行之前需要在Hive中预先创建对应的Iceberg表,创建Icebreg表方式如下:
1、在Hive中添加Iceberg表格式需要的包
启动HDFS集群,node1启动Hive metastore服务,在Hive客户端启动Hive添加Iceberg依赖包:
#node1节点启动Hive metastore服务
[root@node1 ~]# hive --service metastore &
#在hive客户端node3节点加载两个jar包
add jar /software/hive-3.1.2/lib/iceberg-hive-runtime-0.12.1.jar;
add jar /software/hive-3.1.2/lib/libfb303-0.9.3.jar;
2、创建Iceberg表
这里创建Iceberg-DWS表有“DWS_BROWSE_INFO”,创建语句如下:
CREATE TABLE DWS_BROWSE_INFO (
log_time string,
user_id string,
user_ip string,
product_name string,
front_product_url string,
browse_product_url string,
first_category_name string,
second_category_name string,
obtain_points string
)STORED BY 'org.apache.iceberg.mr.hive.HiveIcebergStorageHandler'
LOCATION 'hdfs://mycluster/lakehousedata/icebergdb/DWS_BROWSE_INFO/'
TBLPROPERTIES ('iceberg.catalog'='location_based_table',
'write.metadata.delete-after-commit.enabled'= 'true',
'write.metadata.previous-versions-max' = '3'
);
三、代码测试
以上代码编写完成后,代码执行测试步骤如下:
1、在Kafka中创建对应的topic
#在Kafka 中创建 KAFKA-DWS-BROWSE-LOG-WIDE-TOPIC topic
./kafka-topics.sh --zookeeper node3:2181,node4:2181,node5:2181 --create --topic KAFKA-DWS-BROWSE-LOG-WIDE-TOPIC --partitions 3 --replication-factor 3
#监控以上topic数据
[root@node1 bin]# ./kafka-console-consumer.sh --bootstrap-server node1:9092,node2:9092,node3:9092 --topic KAFKA-DWS-BROWSE-LOG-WIDE-TOPIC
2、将代码中消费Kafka数据改成从头开始消费
代码中Kafka Connector中属性“scan.startup.mode”设置为“earliest-offset”,从头开始消费数据。
这里也可以不设置从头开始消费Kafka数据,而是直接启动向日志采集接口模拟生产日志代码“RTMockUserLogData.java”,需要启动日志采集接口及Flume。
3、执行代码,查看对应结果
以上代码执行后在,在对应的Kafka “KAFKA-DWS-BROWSE-LOG-WIDE-TOPIC” topic中都有对应的数据。在Iceberg-DWS层中对应的表中也有数据。
Kafka中结果如下:
Iceberg-DWD层表”DWS_BROWSE_INFO”中的数据如下:
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