/
item_custom_filter_hologres_dao.go
88 lines (81 loc) · 2.04 KB
/
item_custom_filter_hologres_dao.go
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package module
import (
"database/sql"
"fmt"
"github.com/huandu/go-sqlbuilder"
"github.com/alibaba/pairec/v2/log"
"github.com/alibaba/pairec/v2/persist/holo"
"github.com/alibaba/pairec/v2/recconf"
"time"
)
type ItemCustomFilterHoloDao struct {
db *sql.DB
table string
filterIds map[ItemId]bool
stmt *sql.Stmt
timeInterval int
selectCol string
whereClause string
}
func NewItemCustomFilterHoloDao(config recconf.FilterConfig) *ItemCustomFilterHoloDao {
postgres, err := holo.GetPostgres(config.DaoConf.HologresName)
if err != nil {
log.Error(fmt.Sprintf("%v", err))
return nil
}
dao := &ItemCustomFilterHoloDao{
db: postgres.DB,
table: config.DaoConf.HologresTableName,
filterIds: make(map[ItemId]bool),
timeInterval: config.TimeInterval,
selectCol: config.FilterVal.SelectCol,
whereClause: config.FilterVal.WhereClause,
}
go dao.loopLoadFilterIds()
return dao
}
func (i *ItemCustomFilterHoloDao) GetFilterItems() map[ItemId]bool {
if len(i.filterIds) > 0 {
return i.filterIds
} else {
return i.getFilterIds()
}
}
func (i *ItemCustomFilterHoloDao) getFilterIds() (ret map[ItemId]bool) {
ret = make(map[ItemId]bool)
sb := sqlbuilder.PostgreSQL.NewSelectBuilder()
sb.Select(i.selectCol)
sb.From(i.table)
sb.Where(i.whereClause)
sqlQuery, args := sb.Build()
if i.stmt == nil {
stmt, err := i.db.Prepare(sqlQuery)
if err != nil {
log.Error(fmt.Sprintf("module=ItemCustomFilterHoloDao\tevent=getFilterIds\terror=%v", err))
return
}
i.stmt = stmt
}
rows, err := i.stmt.Query(args...)
if err != nil {
log.Error(fmt.Sprintf("module=ItemCustomFilterHoloDao\tevent=getFilterIds\terror=%v", err))
return
}
defer rows.Close()
for rows.Next() {
var contentId string
if err := rows.Scan(&contentId); err == nil {
ret[ItemId(contentId)] = true
}
}
return
}
func (i *ItemCustomFilterHoloDao) loopLoadFilterIds() {
for {
ret := i.getFilterIds()
if len(ret) > 0 {
i.filterIds = ret
}
time.Sleep(time.Duration(i.timeInterval) * time.Second)
}
}