| /* |
| * 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 dispatcher |
| |
| import ( |
| "reflect" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go/common/extension" |
| "github.com/apache/dubbo-go/common/logger" |
| "github.com/apache/dubbo-go/common/observer" |
| ) |
| |
| func init() { |
| extension.SetEventDispatcher("direct", NewDirectEventDispatcher) |
| } |
| |
| // DirectEventDispatcher is align with DirectEventDispatcher interface in Java. |
| // it's the top abstraction |
| // Align with 2.7.5 |
| // Dispatcher event to listener direct |
| type DirectEventDispatcher struct { |
| observer.BaseListener |
| } |
| |
| // NewDirectEventDispatcher ac constructor of DirectEventDispatcher |
| func NewDirectEventDispatcher() observer.EventDispatcher { |
| return &DirectEventDispatcher{ |
| BaseListener: observer.NewBaseListener(), |
| } |
| } |
| |
| // Dispatch event directly |
| // it lookup the listener by event's type. |
| // if listener not found, it just return and do nothing |
| func (ded *DirectEventDispatcher) Dispatch(event observer.Event) { |
| if event == nil { |
| logger.Warnf("[DirectEventDispatcher] dispatch event nil") |
| return |
| } |
| eventType := reflect.TypeOf(event).Elem() |
| ded.Mutex.RLock() |
| defer ded.Mutex.RUnlock() |
| listenersSlice, loaded := ded.ListenersCache[eventType] |
| if !loaded { |
| return |
| } |
| for _, listener := range listenersSlice { |
| if err := listener.OnEvent(event); err != nil { |
| logger.Warnf("[DirectEventDispatcher] dispatch event error:%v", err) |
| } |
| } |
| } |