| /* |
| * 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 local |
| |
| import ( |
| "github.com/RoaringBitmap/roaring" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go/cluster/router" |
| "github.com/apache/dubbo-go/cluster/router/utils" |
| "github.com/apache/dubbo-go/common" |
| "github.com/apache/dubbo-go/common/logger" |
| "github.com/apache/dubbo-go/protocol" |
| ) |
| |
| const ( |
| localPriority = "local-priority" |
| name = "local-priority-router" |
| ) |
| |
| // LocalPriorityRouter provides a ip-same-first routing logic |
| // if there is not provider with same ip as consumer, it would not filter any invoker |
| // if exists same ip invoker, it would retains this invoker only |
| type LocalPriorityRouter struct { |
| url *common.URL |
| localIP string |
| } |
| |
| // NewLocalPriorityRouter construct an LocalPriorityRouter via url |
| func NewLocalPriorityRouter(url *common.URL) (router.PriorityRouter, error) { |
| r := &LocalPriorityRouter{ |
| url: url, |
| localIP: url.Ip, |
| } |
| return r, nil |
| } |
| |
| // Route gets a list of match-logic invoker |
| func (r *LocalPriorityRouter) Route(invokers *roaring.Bitmap, cache router.Cache, url *common.URL, invocation protocol.Invocation) *roaring.Bitmap { |
| addrPool := cache.FindAddrPool(r) |
| // Add localPriority invoker to the list |
| selectedInvokers := utils.JoinIfNotEqual(addrPool[localPriority], invokers) |
| // If all invokers are considered not match, downgrade to all invoker |
| if selectedInvokers.IsEmpty() { |
| logger.Warnf(" Now all invokers are not match, so downgraded to all! Service: [%s]", url.ServiceKey()) |
| return invokers |
| } |
| return selectedInvokers |
| } |
| |
| // Pool separates same ip invoker from others. |
| func (r *LocalPriorityRouter) Pool(invokers []protocol.Invoker) (router.AddrPool, router.AddrMetadata) { |
| rb := make(router.AddrPool, 8) |
| rb[localPriority] = roaring.NewBitmap() |
| localIpFound := false |
| for i, invoker := range invokers { |
| if invoker.GetUrl().Ip == r.localIP { |
| rb[localPriority].Add(uint32(i)) |
| localIpFound = true |
| } |
| } |
| if localIpFound { |
| // found local desc |
| logger.Debug("found local ip ") |
| return rb, nil |
| } |
| for i, _ := range invokers { |
| rb[localPriority].Add(uint32(i)) |
| } |
| return rb, nil |
| } |
| |
| // ShouldPool will always return true to make sure local call logic constantly. |
| func (r *LocalPriorityRouter) ShouldPool() bool { |
| return true |
| } |
| |
| func (r *LocalPriorityRouter) Name() string { |
| return name |
| } |
| |
| // Priority |
| func (r *LocalPriorityRouter) Priority() int64 { |
| return 0 |
| } |
| |
| // URL Return URL in router |
| func (r *LocalPriorityRouter) URL() *common.URL { |
| return r.url |
| } |