| /* |
| * 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 event |
| |
| import ( |
| "github.com/apache/servicecomb-service-center/pkg/util" |
| ) |
| |
| // Poster post the events of specified subject to the subscribers |
| type Poster struct { |
| subject string |
| groups *util.ConcurrentMap |
| } |
| |
| func (s *Poster) Subject() string { |
| return s.subject |
| } |
| |
| func (s *Poster) Post(job Event) { |
| f := func(g *Group) { |
| g.ForEach(func(m Subscriber) { |
| m.OnMessage(job) |
| }) |
| } |
| |
| if len(job.Group()) == 0 { |
| s.groups.ForEach(func(item util.MapItem) (next bool) { |
| f(item.Value.(*Group)) |
| return true |
| }) |
| return |
| } |
| |
| itf, ok := s.groups.Get(job.Group()) |
| if !ok { |
| return |
| } |
| f(itf.(*Group)) |
| } |
| |
| func (s *Poster) Groups(name string) *Group { |
| g, ok := s.groups.Get(name) |
| if !ok { |
| return nil |
| } |
| return g.(*Group) |
| } |
| |
| func (s *Poster) GetOrNewGroup(name string) *Group { |
| item, _ := s.groups.Fetch(name, func() (interface{}, error) { |
| return NewGroup(name), nil |
| }) |
| return item.(*Group) |
| } |
| |
| func (s *Poster) RemoveGroup(name string) { |
| s.groups.Remove(name) |
| } |
| |
| func (s *Poster) Size() int { |
| return s.groups.Size() |
| } |
| |
| func NewPoster(subject string) *Poster { |
| return &Poster{ |
| subject: subject, |
| groups: util.NewConcurrentMap(0), |
| } |
| } |