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metadata.go
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/
metadata.go
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// Copyright 2017 Quentin Machu & eco authors
//
// Licensed 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 snapshot
import (
"fmt"
"strconv"
"strings"
)
const (
snapshotFilenameSuffix = "etcd.backup"
)
type Metadata struct {
Name string
Revision int64
Size int64
Source Provider
}
func NewMetadata(name string, revision int64, size int64, source Provider) (*Metadata, error) {
if revision < 0 {
var err error
revision, err = strconv.ParseInt(strings.SplitN(name, "_", 3)[1], 16, 64)
if err != nil {
return nil, err
}
}
return &Metadata{
Name: name,
Revision: revision,
Size: size,
Source: source,
}, nil
}
func (m *Metadata) Filename() string {
return fmt.Sprintf("%s_%016x_%s", m.Name, m.Revision, snapshotFilenameSuffix)
}
func (m *Metadata) IsValid() bool {
return strings.HasSuffix(m.Name, snapshotFilenameSuffix)
}
type MetadataSorter []*Metadata
func (ms MetadataSorter) Len() int { return len(ms) }
func (ms MetadataSorter) Swap(i, j int) { ms[i], ms[j] = ms[j], ms[i] }
func (ms MetadataSorter) Less(i, j int) bool { return ms[i].Revision < ms[j].Revision }