dwt_merchantwords_st_detail_merge.py

import os
import sys


sys.path.append(os.path.dirname(sys.path[0]))  # 上级目录
from utils.templates import Templates
from utils.hdfs_utils import HdfsUtils
from utils.spark_util import SparkUtil
from pyspark.sql.window import Window
from pyspark.storagelevel import StorageLevel
from pyspark.sql import functions as F


class DwtMerchantwordsStDetailMerge(Templates):

    def __init__(self, site_name='us'):
        super().__init__()
        self.site_name = site_name
        self.batch = '2024-1'
        self.db_save = 'dwt_merchantwords_st_detail_merge'
        self.spark = self.create_spark_object(
            app_name=f"DwtMerchantwordsStDetailMerge: {self.site_name}, {self.batch}")
        self.partitions_num = 15
        self.partitions_by = ['site_name', 'batch']
        self.df = self.spark.sql(f"select 1+1;")
        self.df_save = self.spark.sql(f"select 1+1;")
        hdfs_path = f"/home/{SparkUtil.DEF_USE_DB}/dwt/{self.db_save}/site_name={self.site_name}/batch={self.batch}"
        print(f"清除hdfs目录中.....{hdfs_path}")
        HdfsUtils.delete_hdfs_file(hdfs_path)


    def read_data(self):
        print("读取dwt_merchantwords_st_detail数据")
        sql = f"""
        select 
            keyword, 
            volume, 
            avg_3m, 
            avg_12m, 
            depth, 
            results_count, 
            sponsored_ads_count, 
            page_1_reviews, 
            appearance, 
            last_seen, 
            update_time, 
            lang, 
            batch as last_batch 
        from dwt_merchantwords_st_detail 
        where site_name = '{self.site_name}'
        and batch in ('2023-1', '2024-1');
        """
        self.df = self.spark.sql(sqlQuery=sql)
        self.df = self.df.repartition(80).persist(StorageLevel.MEMORY_ONLY)
        self.df.show(10, truncate=True)

    def handle_data(self):
        window = Window.partitionBy('keyword').orderBy(
            F.desc_nulls_last('last_batch')
        )
        self.df = self.df.withColumn("u_rank", F.row_number().over(window=window))
        self.df = self.df.filter('u_rank=1').drop('u_rank')
        self.df_save = self.df.withColumn(
            'site_name',
            F.lit(self.site_name)
        ).withColumn(
            'batch',
            F.lit(self.batch)
        )


if __name__ == '__main__':
    site_name = sys.argv[1]
    handle_obj = DwtMerchantwordsStDetailMerge(site_name=site_name)
    handle_obj.run()