/
diversity_hologres_dao.go
135 lines (122 loc) · 3.63 KB
/
diversity_hologres_dao.go
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package module
import (
"context"
"database/sql"
"fmt"
"github.com/goburrow/cache"
"github.com/huandu/go-sqlbuilder"
pctx "github.com/alibaba/pairec/context"
"github.com/alibaba/pairec/log"
"github.com/alibaba/pairec/persist/holo"
"github.com/alibaba/pairec/recconf"
"github.com/alibaba/pairec/utils"
"github.com/alibaba/pairec/utils/sqlutil"
"strconv"
"strings"
"time"
)
type DiversityHologresDao struct {
db *sql.DB
table string
cache cache.Cache
itemKeyField string
distinctFields []string
}
func NewDiversityHologresDao(config recconf.FilterConfig) *DiversityHologresDao {
pg, err := holo.GetPostgres(config.DiversityDaoConf.HologresName)
if err != nil {
log.Error(fmt.Sprintf("error=%v", err))
return nil
}
cacheTime := 70
if config.DiversityDaoConf.CacheTimeInMinutes > 0 {
cacheTime = config.DiversityDaoConf.CacheTimeInMinutes
}
d := &DiversityHologresDao{
db: pg.DB,
table: config.DiversityDaoConf.HologresTableName,
itemKeyField: config.DiversityDaoConf.ItemKeyField,
distinctFields: config.DiversityDaoConf.DistinctFields,
cache: cache.New(cache.WithMaximumSize(10000000), cache.WithExpireAfterWrite(time.Duration(cacheTime)*time.Minute)),
}
return d
}
func (d *DiversityHologresDao) GetDistinctFields() []string {
return d.distinctFields
}
func (d *DiversityHologresDao) GetDistinctValue(items []*Item, ctx *pctx.RecommendContext) error {
itemMap := make(map[ItemId]*Item)
itemIds := make([]interface{}, 0, len(items))
for _, item := range items {
if distinct, ok := d.cache.GetIfPresent(item.Id); ok {
values := distinct.(map[string]interface{})
item.AddProperties(values)
} else {
itemIds = append(itemIds, item.Id)
itemMap[item.Id] = item
}
}
if len(itemIds) == 0 {
return nil
}
sb := sqlbuilder.PostgreSQL.NewSelectBuilder()
sb.Select(d.itemKeyField + "," + strings.Join(d.distinctFields, ","))
sb.From(d.table)
sb.Where(sb.In(d.itemKeyField, itemIds...))
querySql, args := sb.Build()
ctx.LogDebug("DiversityHologresDao sql:" + querySql)
ctx.LogDebug(fmt.Sprintf("DiversityHologresDao sql args: %v", args))
sqlCtx, cancel := context.WithTimeout(context.Background(), 200*time.Millisecond)
defer cancel()
rows, err := d.db.QueryContext(sqlCtx, querySql, args...)
if err != nil {
ctx.LogError(fmt.Sprintf("module=DiversityHologresDao\terror=hologres error(%v)", err))
return err
}
defer rows.Close()
columns, err := rows.ColumnTypes()
if err != nil {
ctx.LogError(fmt.Sprintf("module=DiversityHologresDao\terror=hologres error(%v)", err))
return err
}
count := 0
values := sqlutil.ColumnValues(columns)
for rows.Next() {
if err = rows.Scan(values...); err != nil {
ctx.LogError(fmt.Sprintf("module=DiversityHologresDao\tscan err=%v", err))
continue
} else {
distinct := make(map[string]interface{})
var itemId ItemId = ""
for i, column := range columns {
name := column.Name()
val := values[i]
switch v := val.(type) {
case *sql.NullString:
if v.Valid {
distinct[name] = v.String
}
case *sql.NullInt32:
if v.Valid {
distinct[name] = strconv.Itoa(int(v.Int32))
}
case *sql.NullInt64:
if v.Valid {
distinct[name] = strconv.Itoa(int(v.Int64))
}
}
}
if key, ok := distinct[d.itemKeyField]; ok {
itemId = ItemId(utils.ToString(key, ""))
delete(distinct, d.itemKeyField)
d.cache.Put(itemId, distinct)
if item, okey := itemMap[itemId]; okey {
item.AddProperties(distinct)
count++
}
}
}
}
ctx.LogInfo(fmt.Sprintf("module=DiversityHologresDao\tload %d diversity property", count))
return nil
}