/
log_event_listener.go
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/
log_event_listener.go
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/*
* 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
}