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volume.go
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volume.go
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/*
* Copyright 2016 ClusterHQ
*
* 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 volume
import (
"time"
"github.com/ClusterHQ/fli/meta/attrs"
"github.com/ClusterHQ/fli/meta/snapshot"
"github.com/ClusterHQ/fli/meta/volumeset"
"github.com/ClusterHQ/fli/securefilepath"
)
type (
// ID is the local volume ID
ID string
// Volume ...
Volume struct {
ID ID
VolSetID volumeset.ID
BaseID *snapshot.ID
MntPath securefilepath.SecureFilePath
Attrs attrs.Attrs
CreationTime time.Time
Size uint64
Name string
}
// Query ..
Query struct {
Limit int
// For now, the query will try to match entries that matches
// all attributes present in here.
Attr attrs.Attrs
FromID *ID
}
)
const nilID = ""
// NewID creates a ID from a string returned from a
// previous call to ID.String.
func NewID(s string) ID {
return ID(s)
}
// NilID returns an empty ID.
func NilID() ID {
return ID(nilID)
}
// String ...
func (id ID) String() string {
return string(id)
}
// Equals ..
func (id ID) Equals(target ID) bool {
return id == target
}
// IsNilID ...
func (id ID) IsNilID() bool {
return id == nilID
}
// HasBase ...
func (v Volume) HasBase() bool {
return v.BaseID != nil
}
// Copy ...
func (v *Volume) Copy() *Volume {
if v == nil {
return nil
}
vol := *v
vol.Attrs = v.Attrs.Copy()
return &vol
}
// Matches ..
func (q *Query) Matches(vol Volume) bool {
return vol.Attrs.Matches(q.Attr)
}