| // 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 aggregate |
| |
| import ( |
| "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 AdaptorsIndexer struct { |
| Adaptors []discovery.Adaptor |
| } |
| |
| func (i *AdaptorsIndexer) Search(ctx context.Context, opts ...registry.PluginOpOption) (*discovery.Response, error) { |
| var ( |
| response discovery.Response |
| exists = make(map[string]struct{}) |
| ) |
| for _, a := range i.Adaptors { |
| resp, err := a.Search(ctx, opts...) |
| if err != nil { |
| continue |
| } |
| for _, kv := range resp.Kvs { |
| key := util.BytesToStringWithNoCopy(kv.Key) |
| if _, ok := exists[key]; !ok { |
| exists[key] = struct{}{} |
| response.Kvs = append(response.Kvs, kv) |
| } |
| } |
| response.Count += resp.Count |
| } |
| return &response, nil |
| } |
| |
| func NewAdaptorsIndexer(as []discovery.Adaptor) *AdaptorsIndexer { |
| return &AdaptorsIndexer{Adaptors: as} |
| } |
| |
| type AggregatorIndexer struct { |
| *discovery.CacheIndexer |
| AdaptorsIndexer discovery.Indexer |
| LocalIndexer discovery.Indexer |
| } |
| |
| func (i *AggregatorIndexer) Search(ctx context.Context, opts ...registry.PluginOpOption) (resp *discovery.Response, err error) { |
| op := registry.OpGet(opts...) |
| |
| if op.NoCache() || !op.Global { |
| return i.search(ctx, opts...) |
| } |
| |
| resp, err = i.CacheIndexer.Search(ctx, opts...) |
| if err != nil { |
| return |
| } |
| |
| if resp.Count > 0 || op.CacheOnly() { |
| return resp, nil |
| } |
| |
| return i.search(ctx, opts...) |
| } |
| |
| func (i *AggregatorIndexer) search(ctx context.Context, opts ...registry.PluginOpOption) (*discovery.Response, error) { |
| op := registry.OptionsToOp(opts...) |
| if !op.Global { |
| return i.LocalIndexer.Search(ctx, opts...) |
| } |
| |
| return i.AdaptorsIndexer.Search(ctx, opts...) |
| } |
| |
| func NewAggregatorIndexer(as *Aggregator) *AggregatorIndexer { |
| indexer := NewAdaptorsIndexer(as.Adaptors) |
| ai := &AggregatorIndexer{ |
| CacheIndexer: discovery.NewCacheIndexer(as.Cache()), |
| AdaptorsIndexer: indexer, |
| LocalIndexer: indexer, |
| } |
| if registryIndex >= 0 { |
| ai.LocalIndexer = as.Adaptors[registryIndex] |
| } |
| return ai |
| } |