| /* |
| * 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 registry |
| |
| import ( |
| "fmt" |
| "math/rand" |
| "time" |
| ) |
| |
| import ( |
| "github.com/dubbogo/gost/gof/observer" |
| ) |
| |
| import ( |
| "dubbo.apache.org/dubbo-go/v3/common" |
| "dubbo.apache.org/dubbo-go/v3/remoting" |
| ) |
| |
| type KeyFunc func(*common.URL) string |
| |
| func init() { |
| rand.Seed(time.Now().UnixNano()) |
| } |
| |
| // ServiceEvent includes create, update, delete event |
| type ServiceEvent struct { |
| Action remoting.EventType |
| Service *common.URL |
| key string // store the key for Service.Key() |
| updated bool // If the url is updated, such as Merged. |
| KeyFunc KeyFunc |
| } |
| |
| // String return the description of event |
| func (e *ServiceEvent) String() string { |
| return fmt.Sprintf("ServiceEvent{Action{%s}, Path{%s}, Key{%s}}", e.Action, e.Service, e.key) |
| } |
| |
| // Update updates the url with the merged URL. Work with Updated() can reduce the process |
| // of some merging URL. |
| func (e *ServiceEvent) Update(url *common.URL) { |
| e.Service = url |
| e.updated = true |
| } |
| |
| // Updated checks if the url is updated. If the serviceEvent is updated, then it don't need |
| // merge url again. |
| func (e *ServiceEvent) Updated() bool { |
| return e.updated |
| } |
| |
| // Key generates the key for service.Key(). It is cached once. |
| func (e *ServiceEvent) Key() string { |
| if len(e.key) > 0 { |
| return e.key |
| } |
| if e.KeyFunc == nil { |
| e.key = e.Service.GetCacheInvokerMapKey() |
| } else { |
| e.key = e.KeyFunc(e.Service) |
| } |
| return e.key |
| } |
| |
| // ServiceInstancesChangedEvent represents service instances make some changing |
| type ServiceInstancesChangedEvent struct { |
| observer.BaseEvent |
| ServiceName string |
| Instances []ServiceInstance |
| } |
| |
| // String return the description of the event |
| func (s *ServiceInstancesChangedEvent) String() string { |
| return fmt.Sprintf("ServiceInstancesChangedEvent[source=%s]", s.ServiceName) |
| } |
| |
| // NewServiceInstancesChangedEvent will create the ServiceInstanceChangedEvent instance |
| func NewServiceInstancesChangedEvent(serviceName string, instances []ServiceInstance) *ServiceInstancesChangedEvent { |
| return &ServiceInstancesChangedEvent{ |
| BaseEvent: observer.BaseEvent{ |
| Source: serviceName, |
| Timestamp: time.Now(), |
| }, |
| ServiceName: serviceName, |
| Instances: instances, |
| } |
| } |