platform-spiders/spider_frame/FworkSpider/feapder/pipelines/redis_pipeline.py

# -*- coding: utf-8 -*-
"""
Created on 2021-04-18 14:12:21
---------
@summary: 导出数据(写入Redis，不直接保存在MongoDB)
---------
@author: 马国鹏
@email:  305021384@qq.com
"""
from typing import Dict, List

from feapder.db.redisdb import RedisDB
from feapder.pipelines import BasePipeline
from feapder.utils.tools import log


class RedisPipeline(BasePipeline):
    def __init__(self):
        self._to_db = None

    @property
    def to_db(self):
        if not self._to_db:
            self._to_db = RedisDB()

        return self._to_db

    def save_items(self, table, items: List[Dict]) -> bool:
        """
        保存数据
        Args:
            table: 表名
            items: 数据，[{},{},...]

        Returns: 是否保存成功 True / False
                 若False，不会将本批数据入到去重库，以便再次入库
        """
        try:
            self.to_db.lpush(table=table, values=items)
            datas_size = len(items)
            log.info("共导出 %s 条数据到 %s" % (datas_size, table))
            return True
        except Exception as e:
            log.exception(e)
            return False