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62 lines
1.6 KiB
62 lines
1.6 KiB
// Copyright 2018 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// go-ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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//
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package storage
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import (
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"fmt"
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)
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type Storage interface {
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// Put stores a value by key. 0-length keys results in no-op
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Put(key, value string)
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// Get returns the previously stored value, or the empty string if it does not exist or key is of 0-length
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Get(key string) string
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}
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// EphemeralStorage is an in-memory storage that does
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// not persist values to disk. Mainly used for testing
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type EphemeralStorage struct {
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data map[string]string
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namespace string
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}
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func (s *EphemeralStorage) Put(key, value string) {
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if len(key) == 0 {
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return
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}
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fmt.Printf("storage: put %v -> %v\n", key, value)
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s.data[key] = value
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}
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func (s *EphemeralStorage) Get(key string) string {
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if len(key) == 0 {
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return ""
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}
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fmt.Printf("storage: get %v\n", key)
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if v, exist := s.data[key]; exist {
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return v
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}
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return ""
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}
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func NewEphemeralStorage() Storage {
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s := &EphemeralStorage{
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data: make(map[string]string),
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}
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return s
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}
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