event.go

Documentation: go.etcd.io/etcd/server/v3/etcdserver/api/v2store

     1  // Copyright 2015 The etcd Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package v2store
    16  
    17  const (
    18  	Get              = "get"
    19  	Create           = "create"
    20  	Set              = "set"
    21  	Update           = "update"
    22  	Delete           = "delete"
    23  	CompareAndSwap   = "compareAndSwap"
    24  	CompareAndDelete = "compareAndDelete"
    25  	Expire           = "expire"
    26  )
    27  
    28  type Event struct {
    29  	Action    string      `json:"action"`
    30  	Node      *NodeExtern `json:"node,omitempty"`
    31  	PrevNode  *NodeExtern `json:"prevNode,omitempty"`
    32  	EtcdIndex uint64      `json:"-"`
    33  	Refresh   bool        `json:"refresh,omitempty"`
    34  }
    35  
    36  func newEvent(action string, key string, modifiedIndex, createdIndex uint64) *Event {
    37  	n := &NodeExtern{
    38  		Key:           key,
    39  		ModifiedIndex: modifiedIndex,
    40  		CreatedIndex:  createdIndex,
    41  	}
    42  
    43  	return &Event{
    44  		Action: action,
    45  		Node:   n,
    46  	}
    47  }
    48  
    49  func (e *Event) IsCreated() bool {
    50  	if e.Action == Create {
    51  		return true
    52  	}
    53  	return e.Action == Set && e.PrevNode == nil
    54  }
    55  
    56  func (e *Event) Index() uint64 {
    57  	return e.Node.ModifiedIndex
    58  }
    59  
    60  func (e *Event) Clone() *Event {
    61  	return &Event{
    62  		Action:    e.Action,
    63  		EtcdIndex: e.EtcdIndex,
    64  		Node:      e.Node.Clone(),
    65  		PrevNode:  e.PrevNode.Clone(),
    66  	}
    67  }
    68  
    69  func (e *Event) SetRefresh() {
    70  	e.Refresh = true
    71  }
    72
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