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list_values.go
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list_values.go
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package raphanus
import "github.com/msoap/raphanus/common"
// GetList - get list value by key
func (db *DB) GetList(key string) (value raphanuscommon.ListValue, err error) {
if db.withLock {
db.RLock()
defer db.RUnlock()
}
rawVal, ok := db.data[key]
if !ok {
return value, raphanuscommon.ErrKeyNotExists
}
value, ok = rawVal.(raphanuscommon.ListValue)
if !ok {
return value, raphanuscommon.ErrKeyTypeMissmatch
}
return value, err
}
// SetList - create/update list value by key
func (db *DB) SetList(key string, value raphanuscommon.ListValue, ttl int) error {
if db.withLock {
db.Lock()
defer db.Unlock()
}
if !isValidKey(key) {
return raphanuscommon.ErrKeyIsNotValid
}
db.data[key] = value
db.setTTL(key, ttl)
return nil
}
// UpdateList - update list value by exists key
func (db *DB) UpdateList(key string, value raphanuscommon.ListValue) (err error) {
if db.withLock {
db.Lock()
defer db.Unlock()
}
if _, ok := db.data[key]; !ok {
return raphanuscommon.ErrKeyNotExists
}
db.data[key] = value
return nil
}
// GetListItem - get one item from list value by key
func (db *DB) GetListItem(key string, index int) (string, error) {
if db.withLock {
db.RLock()
defer db.RUnlock()
}
rawVal, ok := db.data[key]
if !ok {
return "", raphanuscommon.ErrKeyNotExists
}
valueList, ok := rawVal.(raphanuscommon.ListValue)
if !ok {
return "", raphanuscommon.ErrKeyTypeMissmatch
}
if index < 0 || index >= len(valueList) {
return "", raphanuscommon.ErrListOutOfRange
}
result := valueList[index]
return result, nil
}
// SetListItem - set one item of list value by key
func (db *DB) SetListItem(key string, index int, value string) error {
if db.withLock {
db.RLock()
defer db.RUnlock()
}
rawVal, ok := db.data[key]
if !ok {
return raphanuscommon.ErrKeyNotExists
}
valueList, ok := rawVal.(raphanuscommon.ListValue)
if !ok {
return raphanuscommon.ErrKeyTypeMissmatch
}
if index < 0 || index >= len(valueList) {
return raphanuscommon.ErrListOutOfRange
}
db.data[key].(raphanuscommon.ListValue)[index] = value
return nil
}