/
store.go
110 lines (86 loc) · 1.96 KB
/
store.go
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// Copyright 2020 The Swarm Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package mock
import (
"encoding"
"encoding/json"
"fmt"
"strings"
"sync"
"github.com/ethsana/sana/pkg/storage"
"github.com/syndtr/goleveldb/leveldb"
)
var _ storage.StateStorer = (*store)(nil)
const mockSchemaNameKey = "schema_name"
type store struct {
store map[string][]byte
mtx sync.RWMutex
}
func NewStateStore() storage.StateStorer {
s := &store{
store: make(map[string][]byte),
}
if err := s.Put(mockSchemaNameKey, "mock_schema"); err != nil {
panic(fmt.Errorf("put schema name: %w", err))
}
return s
}
func (s *store) Get(key string, i interface{}) (err error) {
s.mtx.RLock()
defer s.mtx.RUnlock()
data, ok := s.store[key]
if !ok {
return storage.ErrNotFound
}
if unmarshaler, ok := i.(encoding.BinaryUnmarshaler); ok {
return unmarshaler.UnmarshalBinary(data)
}
return json.Unmarshal(data, i)
}
func (s *store) Put(key string, i interface{}) (err error) {
s.mtx.Lock()
defer s.mtx.Unlock()
var bytes []byte
if marshaler, ok := i.(encoding.BinaryMarshaler); ok {
if bytes, err = marshaler.MarshalBinary(); err != nil {
return err
}
} else if bytes, err = json.Marshal(i); err != nil {
return err
}
s.store[key] = bytes
return nil
}
func (s *store) Delete(key string) (err error) {
s.mtx.Lock()
defer s.mtx.Unlock()
delete(s.store, key)
return nil
}
func (s *store) Iterate(prefix string, iterFunc storage.StateIterFunc) (err error) {
s.mtx.RLock()
defer s.mtx.RUnlock()
for k, v := range s.store {
if !strings.HasPrefix(k, prefix) {
continue
}
val := make([]byte, len(v))
copy(val, v)
stop, err := iterFunc([]byte(k), val)
if err != nil {
return err
}
if stop {
return nil
}
}
return nil
}
// DB implements StateStorer.DB method.
func (s *store) DB() *leveldb.DB {
return nil
}
func (s *store) Close() (err error) {
return nil
}