| /* |
| * 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 etcd |
| |
| import ( |
| "fmt" |
| "github.com/apache/servicecomb-service-center/pkg/util" |
| "github.com/apache/servicecomb-service-center/server/plugin/pkg/discovery" |
| "github.com/apache/servicecomb-service-center/server/plugin/pkg/registry" |
| "golang.org/x/net/context" |
| ) |
| |
| type CacheIndexer struct { |
| *EtcdIndexer |
| *discovery.CacheIndexer |
| } |
| |
| func (i *CacheIndexer) Search(ctx context.Context, opts ...registry.PluginOpOption) (*discovery.Response, error) { |
| op := registry.OpGet(opts...) |
| key := util.BytesToStringWithNoCopy(op.Key) |
| |
| if op.NoCache() { |
| return i.EtcdIndexer.Search(ctx, opts...) |
| } |
| |
| if err := i.CheckPrefix(key); err != nil { |
| return nil, fmt.Errorf("%s, cache is '%s'", err.Error(), i.Cache.Name()) |
| } |
| |
| resp, err := i.CacheIndexer.Search(ctx, opts...) |
| if err != nil { |
| return nil, err |
| } |
| |
| if resp.Count > 0 || op.CacheOnly() { |
| return resp, nil |
| } |
| |
| return i.EtcdIndexer.Search(ctx, opts...) |
| } |
| |
| func NewCacheIndexer(cfg *discovery.Config, cache discovery.Cache) *CacheIndexer { |
| return &CacheIndexer{ |
| EtcdIndexer: NewEtcdIndexer(cfg.Key, cfg.Parser), |
| CacheIndexer: discovery.NewCacheIndexer(cache), |
| } |
| } |