| /* |
| * 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 ( |
| "reflect" |
| "sync" |
| ) |
| |
| 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.AddEventListener(GetLogEventListener) |
| } |
| |
| // logEventListener is singleton |
| type logEventListener struct { |
| } |
| |
| func (l *logEventListener) GetPriority() int { |
| return 0 |
| } |
| |
| func (l *logEventListener) OnEvent(e observer.Event) error { |
| logger.Info("Event happen: " + e.String()) |
| return nil |
| } |
| |
| func (l *logEventListener) GetEventType() reflect.Type { |
| return reflect.TypeOf(&observer.BaseEvent{}) |
| } |
| |
| var logEventListenerInstance *logEventListener |
| var logEventListenerOnce sync.Once |
| |
| func GetLogEventListener() observer.EventListener { |
| logEventListenerOnce.Do(func() { |
| logEventListenerInstance = &logEventListener{} |
| }) |
| return logEventListenerInstance |
| } |