swarm/state: refactor InmemoryStore (#18143)

swarm/network/simulations/overlay.go

@@ -64,12 +64,12 @@ func init() {
 
 type Simulation struct {
 	mtx    sync.Mutex
-	stores map[enode.ID]*state.InmemoryStore
+	stores map[enode.ID]state.Store
 }
 
 func NewSimulation() *Simulation {
 	return &Simulation{
-		stores: make(map[enode.ID]*state.InmemoryStore),
+		stores: make(map[enode.ID]state.Store),
 	}
 }
 

swarm/network/stream/delivery.go

@@ -169,7 +169,7 @@ func (d *Delivery) handleRetrieveRequestMsg(ctx context.Context, sp *Peer, req *
 	go func() {
 		chunk, err := d.chunkStore.Get(ctx, req.Addr)
 		if err != nil {
-			log.Warn("ChunkStore.Get can not retrieve chunk", "err", err)
+			log.Warn("ChunkStore.Get can not retrieve chunk", "peer", sp.ID().String(), "addr", req.Addr, "hopcount", req.HopCount, "err", err)
 			return
 		}
 		if req.SkipCheck {

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

swarm/state/inmemorystore.go

@@ -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 <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()
-	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
-}

swarm/state/store.go

@@ -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 <http://www.gnu.org/licenses/>.
-
-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
-}