vitess.io/vitess@v0.16.2/go/vt/topo/etcd2topo/version.go (about)

     1  /*
     2  Copyright 2019 The Vitess Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package etcd2topo
    18  
    19  import (
    20  	"fmt"
    21  
    22  	"vitess.io/vitess/go/vt/topo"
    23  )
    24  
    25  // EtcdVersion is etcd's idea of a version.
    26  // It implements topo.Version.
    27  // We use the native etcd version type, int64.
    28  type EtcdVersion int64
    29  
    30  // String is part of the topo.Version interface.
    31  func (v EtcdVersion) String() string {
    32  	return fmt.Sprintf("%v", int64(v))
    33  }
    34  
    35  // VersionFromInt is used by old-style functions to create a proper
    36  // Version: if version is -1, returns nil. Otherwise returns the
    37  // EtcdVersion object.
    38  func VersionFromInt(version int64) topo.Version {
    39  	if version == -1 {
    40  		return nil
    41  	}
    42  	return EtcdVersion(version)
    43  }