swarm: network rewrite merge

1 files changed, 94 insertions, 0 deletions

diff --git a/swarm/state/inmemorystore.go b/swarm/state/inmemorystore.go
new file mode 100644
index 000000000..1ca25404a
--- /dev/null
+++ b/swarm/state/inmemorystore.go
@@ -0,0 +1,94 @@
+// Copyright 2018 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package state
+
+import (
+	"encoding"
+	"encoding/json"
+	"sync"
+)
+
+// InmemoryStore is the reference implementation of Store interface that is supposed
+// to be used in tests.
+type InmemoryStore struct {
+	db map[string][]byte
+	mu sync.RWMutex
+}
+
+// NewInmemoryStore returns a new instance of InmemoryStore.
+func NewInmemoryStore() *InmemoryStore {
+	return &InmemoryStore{
+		db: make(map[string][]byte),
+	}
+}
+
+// Get retrieves a value stored for a specific key. If there is no value found,
+// ErrNotFound is returned.
+func (s *InmemoryStore) Get(key string, i interface{}) (err error) {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	bytes, ok := s.db[key]
+	if !ok {
+		return ErrNotFound
+	}
+
+	unmarshaler, ok := i.(encoding.BinaryUnmarshaler)
+	if !ok {
+		return json.Unmarshal(bytes, i)
+	}
+
+	return unmarshaler.UnmarshalBinary(bytes)
+}
+
+// Put stores a value for a specific key.
+func (s *InmemoryStore) Put(key string, i interface{}) (err error) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	bytes := []byte{}
+
+	marshaler, ok := i.(encoding.BinaryMarshaler)
+	if !ok {
+		if bytes, err = json.Marshal(i); err != nil {
+			return err
+		}
+	} else {
+		if bytes, err = marshaler.MarshalBinary(); err != nil {
+			return err
+		}
+	}
+
+	s.db[key] = bytes
+	return nil
+}
+
+// Delete removes value stored under a specific key.
+func (s *InmemoryStore) Delete(key string) (err error) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	if _, ok := s.db[key]; !ok {
+		return ErrNotFound
+	}
+	delete(s.db, key)
+	return nil
+}
+
+// Close does not do anything.
+func (s *InmemoryStore) Close() error {
+	return nil
+}