/
feature_dao.go
132 lines (119 loc) · 4.3 KB
/
feature_dao.go
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package module
import (
gocontext "context"
"fmt"
"strconv"
"strings"
"time"
"github.com/alibaba/pairec/context"
"github.com/alibaba/pairec/log"
"github.com/alibaba/pairec/recconf"
)
const (
Feature_Store_User = "user"
Feature_Store_Item = "item"
Feature_Type_Sequence = "sequence_feature"
Feature_Type_RT_Cnt = "be_rt_cnt_feature"
)
// FeatureDao is interface, it define FeatureFetch to featch feature from implement
type FeatureDao interface {
FeatureFetch(user *User, items []*Item, context *context.RecommendContext)
}
type EmptyFeatureDao struct {
*FeatureBaseDao
}
func NewEmptyFeatureDao(config recconf.FeatureDaoConfig) *EmptyFeatureDao {
return &EmptyFeatureDao{
FeatureBaseDao: NewFeatureBaseDao(&config),
}
}
func (d *EmptyFeatureDao) FeatureFetch(user *User, items []*Item, context *context.RecommendContext) {
if d.featureStore == Feature_Store_User {
d.userFeatureFetch(user, context)
}
}
func (d *EmptyFeatureDao) userFeatureFetch(user *User, context *context.RecommendContext) {
if d.loadFromCacheFeaturesName != "" {
ctx, cancel := gocontext.WithTimeout(gocontext.Background(), 150*time.Millisecond)
defer cancel()
select {
case <-user.FeatureAsyncLoadCh():
user.LoadCacheFeatures(d.loadFromCacheFeaturesName)
case <-ctx.Done():
log.Error(fmt.Sprintf("requestId=%s\tmodule=FeatureDao\tcount=%d\tname=%s\tcache_names=%s\terror=%v", context.RecommendId,
user.FeatureAsyncLoadCount(), d.loadFromCacheFeaturesName, strings.Join(user.GetCacheFeaturesNames(), ","), ctx.Err()))
user.LoadCacheFeatures(d.loadFromCacheFeaturesName)
}
return
}
}
// NewFeatureDao create FeatureDao from config
// config.AdapterType is decide the implement
func NewFeatureDao(config recconf.FeatureDaoConfig) FeatureDao {
if config.AdapterType == recconf.DaoConf_Adapter_Redis {
return NewFeatureRedisDao(config)
} else if config.AdapterType == recconf.DaoConf_Adapter_Hologres {
return NewFeatureHologresDao(config)
} else if config.AdapterType == recconf.DaoConf_Adapter_TableStore {
return NewFeatureTablestoreDao(config)
} else if config.AdapterType == recconf.DaoConf_Adapter_Mysql {
return NewFeatureMysqlDao(config)
} else if config.AdapterType == recconf.DataSource_Type_ClickHouse {
return NewFeatureClickHouseDao(config)
} else if config.AdapterType == recconf.DataSource_Type_FeatureStore {
return NewFeatureFeatureStoreDao(config)
} else if config.AdapterType == recconf.DataSource_Type_BE {
return NewFeatureBeDao(config)
} else if config.AdapterType == recconf.DataSource_Type_Lindorm {
return NewFeatureLindormDao(config)
} else if config.AdapterType == recconf.DataSource_Type_HBase_Thrift {
return NewFeatureHBaseThriftDao(config)
} else {
return NewEmptyFeatureDao(config)
}
}
type FeatureBaseDao struct {
featureKey string // use the value of key to featch data
featureStore string // user or item
featureType string
cacheFeaturesName string
loadFromCacheFeaturesName string
//featureAsyncLoad bool
// sequence feature has under attribute
sequenceLength int
sequenceName string
sequenceEvent string
sequenceDelim string
sequenceDimFields []string
sequencePlayTimeMap map[string]float64
}
func NewFeatureBaseDao(config *recconf.FeatureDaoConfig) *FeatureBaseDao {
dao := FeatureBaseDao{
featureKey: config.FeatureKey,
featureStore: config.FeatureStore,
featureType: config.FeatureType,
cacheFeaturesName: config.CacheFeaturesName,
loadFromCacheFeaturesName: config.LoadFromCacheFeaturesName,
//featureAsyncLoad: config.FeatureAsyncLoad,
sequenceLength: config.SequenceLength,
sequenceName: config.SequenceName,
sequenceEvent: config.SequenceEvent,
sequenceDelim: config.SequenceDelim,
sequencePlayTimeMap: make(map[string]float64, 0),
}
if config.SequencePlayTime != "" {
playTimes := strings.Split(config.SequencePlayTime, ";")
for _, eventTime := range playTimes {
strs := strings.Split(eventTime, ":")
if len(strs) == 2 {
if t, err := strconv.ParseFloat(strs[1], 64); err == nil {
dao.sequencePlayTimeMap[strs[0]] = t
}
}
}
}
if config.SequenceDimFields != "" {
dao.sequenceDimFields = strings.Split(config.SequenceDimFields, ",")
}
return &dao
}