/
user_collaborative_dao.go
62 lines (53 loc) · 1.92 KB
/
user_collaborative_dao.go
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package module
import (
"github.com/alibaba/pairec/v2/context"
"github.com/alibaba/pairec/v2/recconf"
)
type UserCollaborativeDao interface {
ListItemsByUser(user *User, context *context.RecommendContext) []*Item
GetTriggers(user *User, context *context.RecommendContext) (itemTriggers map[string]float64)
GetTriggerInfos(user *User, context *context.RecommendContext) (triggerInfos []*TriggerInfo)
}
func NewUserCollaborativeDao(config recconf.RecallConfig) UserCollaborativeDao {
if config.UserCollaborativeDaoConf.AdapterType == recconf.DaoConf_Adapter_Mysql {
if config.UserCollaborativeDaoConf.Adapter == "UserCollaborativeMysqlDao" {
return NewUserCollaborativeMysqlDao(config)
} else if config.UserCollaborativeDaoConf.Adapter == "UserVideoCollaborativeMysqlDao" {
return NewUserVideoCollaborativeMysqlDao(config)
}
} else if config.UserCollaborativeDaoConf.AdapterType == recconf.DaoConf_Adapter_TableStore {
return NewUserCollaborativeTableStoreDao(config)
} else if config.UserCollaborativeDaoConf.AdapterType == recconf.DaoConf_Adapter_Hologres {
return NewUserCollaborativeHologresDao(config)
} else if config.UserCollaborativeDaoConf.AdapterType == recconf.DaoConf_Adapter_Redis {
return NewUserCollaborativeRedisDao(config)
}
panic("not found UserCollaborativeDao implement")
}
func mergeUserCollaborativeItemsResult(itemCh chan []*Item, cpuCount int, normalization bool) []*Item {
retMap := make(map[ItemId]*Item)
var maxScore float64 = 0
for i := 0; i < cpuCount; i++ {
items := <-itemCh
for _, item := range items {
if retMap[item.Id] == nil {
retMap[item.Id] = item
} else {
retMap[item.Id].Score += item.Score
}
}
}
ret := make([]*Item, 0, len(retMap))
for _, item := range retMap {
if item.Score > maxScore {
maxScore = item.Score
}
ret = append(ret, item)
}
if normalization && maxScore > 0 {
for i := range ret {
ret[i].Score /= maxScore
}
}
return ret
}