dubbo.apache.org/dubbo-go/v3@v3.1.1/remoting/listener.go (about)

     1  /*
     2   * Licensed to the Apache Software Foundation (ASF) under one or more
     3   * contributor license agreements.  See the NOTICE file distributed with
     4   * this work for additional information regarding copyright ownership.
     5   * The ASF licenses this file to You under the Apache License, Version 2.0
     6   * (the "License"); you may not use this file except in compliance with
     7   * the License.  You may obtain a copy of the License at
     8   *
     9   *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  
    18  package remoting
    19  
    20  import (
    21  	"fmt"
    22  )
    23  
    24  // DataListener defines common data listener interface
    25  type DataListener interface {
    26  	DataChange(event Event) bool // bool is return for interface implement is interesting
    27  }
    28  
    29  // EventType means SourceObjectEventType
    30  type EventType int
    31  
    32  const (
    33  	// EventTypeAdd means add event
    34  	EventTypeAdd EventType = iota
    35  	// EventTypeDel means del event
    36  	EventTypeDel
    37  	EventTypeUpdate
    38  )
    39  
    40  var serviceEventTypeStrings = [...]string{
    41  	"add",
    42  	"delete",
    43  	"update",
    44  }
    45  
    46  // nolint
    47  func (t EventType) String() string {
    48  	return serviceEventTypeStrings[t]
    49  }
    50  
    51  // Event defines common elements for service event
    52  type Event struct {
    53  	Path    string
    54  	Action  EventType
    55  	Content string
    56  }
    57  
    58  // nolint
    59  func (e Event) String() string {
    60  	return fmt.Sprintf("Event{Action{%s}, Content{%s}}", e.Action, e.Content)
    61  }