| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package kvstore |
| |
| import ( |
| "encoding/json" |
| "fmt" |
| "strconv" |
| "time" |
| |
| simple "github.com/apache/servicecomb-service-center/pkg/time" |
| "github.com/apache/servicecomb-service-center/pkg/util" |
| "github.com/go-chassis/cari/discovery" |
| "github.com/little-cui/etcdadpt" |
| ) |
| |
| var ( |
| Types []Type |
| typeNames []string |
| ) |
| |
| const ( |
| TypeError = Type(-1) |
| ) |
| |
| type Type int |
| |
| func (st Type) String() string { |
| if int(st) < 0 { |
| return "TypeError" |
| } |
| if int(st) < len(typeNames) { |
| return typeNames[st] |
| } |
| return "TYPE" + strconv.Itoa(int(st)) |
| } |
| |
| func RegisterType(name string) (newID Type, err error) { |
| for _, n := range Types { |
| if n.String() == name { |
| return TypeError, fmt.Errorf("redeclare store type '%s'", n) |
| } |
| } |
| newID = Type(len(Types)) |
| Types = append(Types, newID) |
| typeNames = append(typeNames, name) |
| return |
| } |
| |
| type KeyValue struct { |
| Key []byte |
| Value interface{} |
| Version int64 |
| CreateRevision int64 |
| ModRevision int64 |
| ClusterName string |
| } |
| |
| func (kv *KeyValue) String() string { |
| b, _ := json.Marshal(kv.Value) |
| return fmt.Sprintf("{key: '%s', value: %s, version: %d, cluster: '%s'}", |
| util.BytesToStringWithNoCopy(kv.Key), util.BytesToStringWithNoCopy(b), kv.Version, kv.ClusterName) |
| } |
| |
| func NewKeyValue() *KeyValue { |
| return &KeyValue{ClusterName: etcdadpt.DefaultClusterName} |
| } |
| |
| type Response struct { |
| Kvs []*KeyValue |
| Count int64 |
| } |
| |
| type Event struct { |
| Revision int64 |
| Type discovery.EventType |
| KV *KeyValue |
| CreateAt simple.Time |
| } |
| |
| type EventFunc func(evt Event) |
| |
| type EventHandler interface { |
| Type() Type |
| OnEvent(evt Event) |
| } |
| |
| func NewEvent(action discovery.EventType, kv *KeyValue, rev int64) Event { |
| return Event{Type: action, KV: kv, Revision: rev, CreateAt: simple.FromTime(time.Now())} |
| } |