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keyvalue.go
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/
keyvalue.go
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// Copyright (c) 2015 Mute Communications Ltd.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package keydb
import (
"database/sql"
"github.com/mutecomm/mute/log"
)
// AddValue adds a key-value pair to keyDB.
func (keyDB *KeyDB) AddValue(key, value string) error {
if key == "" {
return log.Error("keydb: key must be defined")
}
if value == "" {
return log.Error("keydb: value must be defined")
}
res, err := keyDB.updateValueQuery.Exec(value, key)
if err != nil {
return log.Error(err)
}
nRows, err := res.RowsAffected()
if err != nil {
return log.Error(err)
}
if nRows == 0 {
_, err := keyDB.insertValueQuery.Exec(key, value)
if err != nil {
return log.Error(err)
}
}
return nil
}
// GetValue gets the value for the given key from keyDB.
func (keyDB *KeyDB) GetValue(key string) (string, error) {
if key == "" {
return "", log.Error("keydb: key must be defined")
}
var value string
err := keyDB.getValueQuery.QueryRow(key).Scan(&value)
switch {
case err == sql.ErrNoRows:
return "", nil
case err != nil:
return "", log.Error(err)
default:
return value, nil
}
}