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// Copyright 2018 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
//
package storage
import (
"fmt"
)
type Storage interface {
// Put stores a value by key. 0-length keys results in no-op
Put(key, value string)
// Get returns the previously stored value, or the empty string if it does not exist or key is of 0-length
Get(key string) string
}
// EphemeralStorage is an in-memory storage that does
// not persist values to disk. Mainly used for testing
type EphemeralStorage struct {
data map[string]string
namespace string
}
func (s *EphemeralStorage) Put(key, value string) {
if len(key) == 0 {
return
}
fmt.Printf("storage: put %v -> %v\n", key, value)
s.data[key] = value
}
func (s *EphemeralStorage) Get(key string) string {
if len(key) == 0 {
return ""
}
fmt.Printf("storage: get %v\n", key)
if v, exist := s.data[key]; exist {
return v
}
return ""
}
func NewEphemeralStorage() Storage {
s := &EphemeralStorage{
data: make(map[string]string),
}
return s
}
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