import time from datetime import date, timedelta, datetime from log import Log from db_helper import RedisHelper from config import set_config from utils import FilterVideos, get_videos_remain_view_count, get_videos_local_distribute_count import gevent log_ = Log() config_ = set_config() class PoolRecall(object): """召回""" def __init__(self, app_type, mid='', uid='', ab_code=''): """ 初始化 :param app_type: 产品标识 type-int :param mid: mid type-string :param uid: uid type-string :param ab_code: ab_code type-int """ self.app_type = app_type self.mid = mid self.uid = uid self.ab_code = ab_code self.redis_helper = RedisHelper() def rov_pool_recall(self, size=10): """从ROV召回池中获取视频""" log_.info('====== rov pool recall') # 获取相关redis key, 用户上一次在rov召回池对应的位置 rov_pool_key, last_rov_recall_key, idx = self.get_video_last_idx() if not rov_pool_key: log_.info('ROV召回池中无视频') return [] rov_pool_recall_result = [] # 每次获取的视频数 get_size = size * 2 # 记录获取频次 freq = 0 while len(rov_pool_recall_result) < size: freq += 1 if freq > config_.MAX_FREQ_FROM_ROV_POOL: break # 获取数据 st_get = time.time() data = self.redis_helper.get_data_zset_with_index(key_name=rov_pool_key, start=idx, end=idx + get_size - 1, with_scores=True) et_get = time.time() log_.info('get data from rov pool redis: freq = {}, data = {}, execute time = {}ms'.format( freq, data, (et_get - st_get) * 1000)) if not data: log_.info('ROV召回池中的视频已取完') break # 获取视频id,并转换类型为int,并存储为key-value{videoId: score} video_ids = [] video_score = {} for value in data: video_ids.append(eval(value[0])) video_score[eval(value[0])] = value[1] # 过滤 debug_tm_b = time.time() filter_ = FilterVideos(app_type=self.app_type, mid=self.mid, uid=self.uid, video_ids=video_ids) ge = gevent.spawn(filter_.filter_videos) ge.join() filtered_result = ge.get() #filtered_result = filter_.filter_videos() debug_tm_e = time.time() if filtered_result: # 添加视频源参数 pushFrom, abCode temp_result = [{'videoId': item, 'rovScore': video_score[item], 'pushFrom': 'recall_pool', 'abCode': self.ab_code} for item in filtered_result] rov_pool_recall_result.extend(temp_result) else: # 将此次获取的末位视频id同步刷新到Redis中，方便下次快速定位到召回位置，过期时间为1天 self.redis_helper.set_data_to_redis(key_name=last_rov_recall_key, value=data[-1][0]) idx += get_size return rov_pool_recall_result[:size] def flow_pool_recall(self, size=10): """从流量池中获取视频""" log_.info('====== flow pool recall') flow_pool_key = self.get_pool_redis_key('flow') flow_pool_recall_result = [] flow_pool_recall_videos = [] # 每次获取的视频数 get_size = size * 3 # 记录获取频次 freq = 0 idx = 0 while len(flow_pool_recall_result) < size: freq += 1 # 获取数据 st_get = time.time() data = self.redis_helper.get_data_zset_with_index(key_name=flow_pool_key, start=idx, end=idx + get_size - 1, with_scores=True) et_get = time.time() log_.info('get data from flow pool redis: freq = {}, data = {}, execute time = {}ms'.format( freq, data, (et_get - st_get) * 1000)) if not data: log_.info('流量池中的视频已取完') break # 将video_id 与 flow_pool, score做mapping整理 video_ids = [] video_mapping = {} video_score = {} for value in data: video_id, flow_pool = value[0].split('-') video_id = eval(video_id) if video_id not in video_ids: video_ids.append(video_id) video_score[video_id] = value[1] if video_id not in video_mapping: video_mapping[video_id] = [flow_pool] else: video_mapping[video_id].append(flow_pool) # 过滤 filter_ = FilterVideos(app_type=self.app_type, mid=self.mid, uid=self.uid, video_ids=video_ids) ge = gevent.spawn(filter_.filter_videos) ge.join() filtered_result = ge.get() #filtered_result = filter_.filter_videos() # 检查可分发数 if filtered_result: st_check = time.time() ge = gevent.spawn(self.check_video_counts, video_ids=filtered_result, flow_pool_mapping=video_mapping) ge.join() check_result = ge.get() #check_result, error_flag = self.check_video_counts(video_ids=filtered_result, flow_pool_mapping=video_mapping) # 判断错误标记, True为错误 if error_flag: # 结束流量池召回 break for item in check_result: if item[0] not in flow_pool_recall_videos: # 取其中一个 flow_pool 作为召回结果 # 添加视频源参数 pushFrom, abCode flow_pool_recall_result.append( {'videoId': item[0], 'flowPool': item[1], 'distributeCount': item[2], 'rovScore': video_score[item[0]], 'pushFrom': 'flow_pool', 'abCode': self.ab_code} ) flow_pool_recall_videos.append(item[0]) et_check = time.time() log_.info('check result: result = {}, execute time = {}ms'.format( check_result, (et_check - st_check) * 1000)) idx += get_size return flow_pool_recall_result[:size] def check_video_counts(self, video_ids, flow_pool_mapping): """ 检查视频剩余可分发数 :param video_ids: 视频id type-list :param flow_pool_mapping: 视频id-流量池标记mapping, type-dict :return: check_result, error_flag """ flow_pool_key = self.get_pool_redis_key('flow') videos = [] for video_id in video_ids: for flow_pool in flow_pool_mapping[video_id]: videos.append({'videoId': video_id, 'flowPool': flow_pool}) view_count_result, error_flag = get_videos_remain_view_count(app_type=self.app_type, videos=videos) log_.info('error_flag = {}, view_count_result = {}'.format(error_flag, view_count_result)) # 判断返回的错误标记，True为错误 if error_flag: # 从流量召回池移除视频videos for item in videos: value = '{}-{}'.format(item['videoId'], item['flowPool']) self.redis_helper.remove_value_from_zset(key_name=flow_pool_key, value=value) check_result = [] for item in view_count_result: if item[2] > 0: # viewCount > 0 # 判断本地分发数 cur_count = get_videos_local_distribute_count(video_id=item[0], flow_pool=item[1]) # 无记录 或 cur_count > 0 if cur_count is None or cur_count > 0: check_result.append(item) # cur_count <= 0，从流量召回池移除 else: value = '{}-{}'.format(item[0], item[1]) self.redis_helper.remove_value_from_zset(key_name=flow_pool_key, value=value) else: # viewCount <= 0 # 从流量召回池移除 value = '{}-{}'.format(item[0], item[1]) self.redis_helper.remove_value_from_zset(key_name=flow_pool_key, value=value) return check_result, error_flag def get_pool_redis_key(self, pool_type): """ 拼接key :param pool_type: type-string {'rov': rov召回池, 'flow': 流量池} :return: key_name """ if pool_type == 'rov': # appType = 6 if self.app_type == config_.APP_TYPE['SHORT_VIDEO']: # 获取当前所在小时 redis_date = datetime.now().hour # 判断热度列表是否更新，未更新则使用前一小时的热度列表 key_name = '{}{}.{}'.format(config_.RECALL_KEY_NAME_PREFIX_APP_TYPE, self.app_type, redis_date) if self.redis_helper.key_exists(key_name): return key_name, redis_date else: key_name = '{}{}.{}'.format(config_.RECALL_KEY_NAME_PREFIX_APP_TYPE, self.app_type, redis_date - 1) return key_name, redis_date - 1 # 其他 else: # 判断热度列表是否更新，未更新则使用前一天的热度列表 key_name = config_.RECALL_KEY_NAME_PREFIX + time.strftime('%Y%m%d') if self.redis_helper.key_exists(key_name): redis_date = date.today().strftime('%Y%m%d') else: redis_date = (date.today() - timedelta(days=1)).strftime('%Y%m%d') key_name = config_.RECALL_KEY_NAME_PREFIX + redis_date # if not self.redis_helper.key_exists(key_name): # return None, None return key_name, redis_date elif pool_type == 'flow': return config_.FLOW_POOL_KEY_NAME_PREFIX + str(self.app_type) else: log_.error('pool type error') return None, None def get_video_last_idx(self): """获取用户上一次在rov召回池对应的位置""" rov_pool_key, redis_date = self.get_pool_redis_key('rov') if not rov_pool_key: return None, None, None last_rov_recall_key = config_.LAST_VIDEO_FROM_ROV_POOL_PREFIX + '{}.{}.{}'.format( self.app_type, self.mid, redis_date) value = self.redis_helper.get_data_from_redis(last_rov_recall_key) if value: idx = self.redis_helper.get_index_with_data(rov_pool_key, value) if not idx: idx = 0 else: idx += 1 else: idx = 0 return rov_pool_key, last_rov_recall_key, idx