| /* |
| * 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 cache |
| |
| import ( |
| "fmt" |
| "github.com/apache/servicecomb-service-center/pkg/cache" |
| "github.com/apache/servicecomb-service-center/pkg/log" |
| apt "github.com/apache/servicecomb-service-center/server/core" |
| "github.com/apache/servicecomb-service-center/server/core/backend" |
| pb "github.com/apache/servicecomb-service-center/server/core/proto" |
| "github.com/apache/servicecomb-service-center/server/plugin/pkg/registry" |
| serviceUtil "github.com/apache/servicecomb-service-center/server/service/util" |
| "golang.org/x/net/context" |
| "sort" |
| ) |
| |
| var clustersIndex = make(map[string]int) |
| |
| func init() { |
| var clusters []string |
| for name := range registry.Configuration().Clusters { |
| clusters = append(clusters, name) |
| } |
| sort.Strings(clusters) |
| for i, name := range clusters { |
| clustersIndex[name] = i |
| } |
| } |
| |
| type InstancesFilter struct { |
| } |
| |
| func (f *InstancesFilter) Name(ctx context.Context, _ *cache.Node) string { |
| return "" |
| } |
| |
| func (f *InstancesFilter) Init(ctx context.Context, parent *cache.Node) (node *cache.Node, err error) { |
| pCopy := *parent.Cache.Get(CACHE_FIND).(*VersionRuleCacheItem) |
| pCopy.Instances, pCopy.Rev, err = f.FindInstances(ctx, pCopy.ServiceIds) |
| if err != nil { |
| return |
| } |
| |
| pCopy.InitBrokenQueue() |
| node = cache.NewNode() |
| node.Cache.Set(CACHE_FIND, &pCopy) |
| return |
| } |
| |
| func (f *InstancesFilter) FindInstances(ctx context.Context, serviceIds []string) (instances []*pb.MicroServiceInstance, rev string, err error) { |
| provider := ctx.Value(CTX_FIND_PROVIDER).(*pb.MicroServiceKey) |
| var ( |
| maxRevs = make([]int64, len(clustersIndex)) |
| counts = make([]int64, len(clustersIndex)) |
| ) |
| for _, providerServiceId := range serviceIds { |
| key := apt.GenerateInstanceKey(provider.Tenant, providerServiceId, "") |
| opts := append(serviceUtil.FromContext(ctx), registry.WithStrKey(key), registry.WithPrefix()) |
| resp, err := backend.Store().Instance().Search(ctx, opts...) |
| if err != nil { |
| consumer := ctx.Value(CTX_FIND_CONSUMER).(*pb.MicroService) |
| findFlag := fmt.Sprintf("consumer '%s' find provider %s/%s/%s", consumer.ServiceId, |
| provider.AppId, provider.ServiceName, provider.Version) |
| log.Errorf(err, "Instance().Search failed, %s", findFlag) |
| return nil, "", err |
| } |
| |
| for _, kv := range resp.Kvs { |
| if i, ok := clustersIndex[kv.ClusterName]; ok { |
| if kv.ModRevision > maxRevs[i] { |
| maxRevs[i] = kv.ModRevision |
| } |
| counts[i]++ |
| } |
| instances = append(instances, kv.Value.(*pb.MicroServiceInstance)) |
| } |
| |
| } |
| |
| return instances, serviceUtil.FormatRevision(maxRevs, counts), nil |
| } |