From 4c181e4fb98bb88503cccd6147026b6c2b7b56f6 Mon Sep 17 00:00:00 2001 From: Anton Evangelatov Date: Wed, 21 Nov 2018 14:36:56 +0100 Subject: swarm/state: refactor InmemoryStore (#18143) --- swarm/state/dbstore.go | 21 ++++++++++ swarm/state/inmemorystore.go | 94 -------------------------------------------- swarm/state/store.go | 26 ------------ 3 files changed, 21 insertions(+), 120 deletions(-) delete mode 100644 swarm/state/inmemorystore.go delete mode 100644 swarm/state/store.go (limited to 'swarm/state') diff --git a/swarm/state/dbstore.go b/swarm/state/dbstore.go index b0aa92e27..fc5dd8f7c 100644 --- a/swarm/state/dbstore.go +++ b/swarm/state/dbstore.go @@ -22,6 +22,7 @@ import ( "errors" "github.com/syndtr/goleveldb/leveldb" + "github.com/syndtr/goleveldb/leveldb/storage" ) // ErrNotFound is returned when no results are returned from the database @@ -30,6 +31,15 @@ var ErrNotFound = errors.New("ErrorNotFound") // ErrInvalidArgument is returned when the argument type does not match the expected type var ErrInvalidArgument = errors.New("ErrorInvalidArgument") +// Store defines methods required to get, set, delete values for different keys +// and close the underlying resources. +type Store interface { + Get(key string, i interface{}) (err error) + Put(key string, i interface{}) (err error) + Delete(key string) (err error) + Close() error +} + // DBStore uses LevelDB to store values. type DBStore struct { db *leveldb.DB @@ -46,6 +56,17 @@ func NewDBStore(path string) (s *DBStore, err error) { }, nil } +// NewInmemoryStore returns a new instance of DBStore. To be used only in tests and simulations. +func NewInmemoryStore() *DBStore { + db, err := leveldb.Open(storage.NewMemStorage(), nil) + if err != nil { + panic(err) + } + return &DBStore{ + db: db, + } +} + // Get retrieves a persisted value for a specific key. If there is no results // ErrNotFound is returned. The provided parameter should be either a byte slice or // a struct that implements the encoding.BinaryUnmarshaler interface diff --git a/swarm/state/inmemorystore.go b/swarm/state/inmemorystore.go deleted file mode 100644 index 3ba48592b..000000000 --- a/swarm/state/inmemorystore.go +++ /dev/null @@ -1,94 +0,0 @@ -// 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 . - -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() - var 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 -} diff --git a/swarm/state/store.go b/swarm/state/store.go deleted file mode 100644 index fb7fe258f..000000000 --- a/swarm/state/store.go +++ /dev/null @@ -1,26 +0,0 @@ -// 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 . - -package state - -// Store defines methods required to get, set, delete values for different keys -// and close the underlying resources. -type Store interface { - Get(key string, i interface{}) (err error) - Put(key string, i interface{}) (err error) - Delete(key string) (err error) - Close() error -} -- cgit v1.2.3