/
memdb.go
79 lines (68 loc) · 1.44 KB
/
memdb.go
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package libkb
import (
"errors"
"fmt"
"sync"
lru "github.com/hashicorp/golang-lru"
)
type MemDb struct {
sync.Mutex
lru *lru.Cache
}
var _ LocalDb = (*MemDb)(nil)
func NewMemDb(size int) *MemDb {
c, _ := lru.New(size)
return &MemDb{
lru: c,
}
}
func (m *MemDb) Open() error { return nil }
func (m *MemDb) Stats() string { return "" }
func (m *MemDb) CompactionStats() (bool, bool, error) {
return false, false, nil
}
func (m *MemDb) ForceOpen() error { return nil }
func (m *MemDb) Close() error {
m.lru.Purge()
return nil
}
func (m *MemDb) Nuke() (string, error) {
m.lru.Purge()
return "", nil
}
func (m *MemDb) Clean(force bool) error {
return nil
}
func (m *MemDb) OpenTransaction() (res LocalDbTransaction, err error) {
return res, errors.New("not implemented")
}
func (m *MemDb) Put(id DbKey, aliases []DbKey, value []byte) error {
m.Lock()
defer m.Unlock()
m.lru.Add(id, value)
for _, a := range aliases {
m.lru.Add(a, value)
}
return nil
}
func (m *MemDb) Delete(id DbKey) error {
m.Lock()
defer m.Unlock()
m.lru.Remove(id)
return nil
}
func (m *MemDb) Get(id DbKey) ([]byte, bool, error) {
m.Lock()
defer m.Unlock()
val, ok := m.lru.Get(id)
if !ok {
return nil, false, nil
}
return val.([]byte), true, nil
}
func (m *MemDb) Lookup(alias DbKey) ([]byte, bool, error) {
return m.Get(alias)
}
func (m *MemDb) KeysWithPrefixes(prefixes ...[]byte) (DBKeySet, error) {
return nil, fmt.Errorf("unimplemented on memdb")
}