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vector_hbase_dao.go
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/
vector_hbase_dao.go
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package module
import (
"fmt"
"strings"
"github.com/alibaba/pairec/datasource/hbase"
"github.com/alibaba/pairec/recconf"
)
// VectorHBaseDao is hbase implement of vector dao
type VectorHBaseDao struct {
client *hbase.HBase
prefix string
table string
columnFamily string
qualifier string
// defaultKey string
}
// NewVectorHBaseDao create new VectorHBaseDao
func NewVectorHBaseDao(config recconf.RecallConfig) *VectorHBaseDao {
dao := &VectorHBaseDao{
prefix: config.DaoConf.HBasePrefix,
table: config.DaoConf.HBaseTable,
columnFamily: config.DaoConf.ColumnFamily,
qualifier: config.DaoConf.Qualifier,
// defaultKey: config.DaoConf.RedisDefaultKey,
}
client, err := hbase.GetHBase(config.DaoConf.HBaseName)
if err != nil {
panic(err)
}
dao.client = client
return dao
}
// VectorString get data from hbase by id key
// returns vector of string
func (d *VectorHBaseDao) VectorString(id string) (string, error) {
// key := fmt.Sprintf("UI2V_%s", user.Id)
key := d.prefix + string(id)
resp, err := d.client.Get(d.table, key, d.columnFamily, d.qualifier)
if err != nil {
return "", err
}
if len(resp.Cells) == 0 {
return "", VectoryEmptyError
}
value := string(resp.Cells[0].Value)
value = strings.Trim(value, "[]")
values := strings.Split(value, ",")
var list []string
i := 1
// same as redis format 1:xx 2:xx 3:xx
// same as libsvm format
for _, val := range values {
list = append(list, fmt.Sprintf("%d:%s", i, strings.Trim(val, " ")))
i++
}
return strings.Join(list, " "), nil
}