73 lines
1.7 KiB
Go
73 lines
1.7 KiB
Go
// Copyright 2016 ego authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"): you may
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// not use this file except in compliance with the License. You may obtain
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// a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations
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// under the License.
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package store
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import (
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"fmt"
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"os"
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)
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const (
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// DefaultStore default store engine
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DefaultStore = "ldb"
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// DefaultStore = "bad"
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// DefaultStore = "bolt"
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)
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var supportedStore = map[string]func(path string) (Store, error){
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"ldb": OpenLeveldb,
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"bg": OpenBadger, // bad to bg
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"bolt": OpenBolt,
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// "kv": OpenKV,
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// "ledisdb": Open,
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}
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// RegisterStore register store engine
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func RegisterStore(name string, fn func(path string) (Store, error)) {
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supportedStore[name] = fn
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}
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// Store is store interface
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type Store interface {
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// type KVBatch interface {
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Set(k, v []byte) error
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Get(k []byte) ([]byte, error)
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Delete(k []byte) error
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Has(k []byte) (bool, error)
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ForEach(fn func(k, v []byte) error) error
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Close() error
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WALName() string
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}
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// OpenStore open store engine
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func OpenStore(path string, args ...string) (Store, error) {
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storeName := DefaultStore
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if len(args) > 0 && args[0] != "" {
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storeName = args[0]
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} else {
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storeEnv := os.Getenv("Riot_Store_Engine")
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if storeEnv != "" {
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storeName = storeEnv
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}
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}
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if fn, has := supportedStore[storeName]; has {
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return fn(path)
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}
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return nil, fmt.Errorf("unsupported store engine: %v", storeName)
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}
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