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noncurrentversion.go
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noncurrentversion.go
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// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package lifecycle
import (
"encoding/xml"
"time"
)
// NoncurrentVersionExpiration - an action for lifecycle configuration rule.
type NoncurrentVersionExpiration struct {
XMLName xml.Name `xml:"NoncurrentVersionExpiration"`
NoncurrentDays ExpirationDays `xml:"NoncurrentDays,omitempty"`
NewerNoncurrentVersions int `xml:"NewerNoncurrentVersions,omitempty"`
set bool
}
// MarshalXML if non-current days not set to non zero value
func (n NoncurrentVersionExpiration) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
if n.IsNull() {
return nil
}
type noncurrentVersionExpirationWrapper NoncurrentVersionExpiration
return e.EncodeElement(noncurrentVersionExpirationWrapper(n), start)
}
// UnmarshalXML decodes NoncurrentVersionExpiration
func (n *NoncurrentVersionExpiration) UnmarshalXML(d *xml.Decoder, startElement xml.StartElement) error {
// To handle xml with MaxNoncurrentVersions from older MinIO releases.
// note: only one of MaxNoncurrentVersions or NewerNoncurrentVersions would be present.
type noncurrentExpiration struct {
XMLName xml.Name `xml:"NoncurrentVersionExpiration"`
NoncurrentDays ExpirationDays `xml:"NoncurrentDays,omitempty"`
NewerNoncurrentVersions int `xml:"NewerNoncurrentVersions,omitempty"`
MaxNoncurrentVersions int `xml:"MaxNoncurrentVersions,omitempty"`
}
var val noncurrentExpiration
err := d.DecodeElement(&val, &startElement)
if err != nil {
return err
}
if val.MaxNoncurrentVersions > 0 {
val.NewerNoncurrentVersions = val.MaxNoncurrentVersions
}
*n = NoncurrentVersionExpiration{
XMLName: val.XMLName,
NoncurrentDays: val.NoncurrentDays,
NewerNoncurrentVersions: val.NewerNoncurrentVersions,
}
n.set = true
return nil
}
// IsNull returns if both NoncurrentDays and NoncurrentVersions are empty
func (n NoncurrentVersionExpiration) IsNull() bool {
return n.IsDaysNull() && n.NewerNoncurrentVersions == 0
}
// IsDaysNull returns true if days field is null
func (n NoncurrentVersionExpiration) IsDaysNull() bool {
return n.NoncurrentDays == ExpirationDays(0)
}
// Validate returns an error with wrong value
func (n NoncurrentVersionExpiration) Validate() error {
if !n.set {
return nil
}
val := int(n.NoncurrentDays)
switch {
case val == 0 && n.NewerNoncurrentVersions == 0:
// both fields can't be zero
return errXMLNotWellFormed
case val < 0, n.NewerNoncurrentVersions < 0:
// negative values are not supported
return errXMLNotWellFormed
}
return nil
}
// NoncurrentVersionTransition - an action for lifecycle configuration rule.
type NoncurrentVersionTransition struct {
NoncurrentDays TransitionDays `xml:"NoncurrentDays"`
StorageClass string `xml:"StorageClass"`
set bool
}
// MarshalXML is extended to leave out
// <NoncurrentVersionTransition></NoncurrentVersionTransition> tags
func (n NoncurrentVersionTransition) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
if n.IsNull() {
return nil
}
type noncurrentVersionTransitionWrapper NoncurrentVersionTransition
return e.EncodeElement(noncurrentVersionTransitionWrapper(n), start)
}
// UnmarshalXML decodes NoncurrentVersionExpiration
func (n *NoncurrentVersionTransition) UnmarshalXML(d *xml.Decoder, startElement xml.StartElement) error {
type noncurrentVersionTransitionWrapper NoncurrentVersionTransition
var val noncurrentVersionTransitionWrapper
err := d.DecodeElement(&val, &startElement)
if err != nil {
return err
}
*n = NoncurrentVersionTransition(val)
n.set = true
return nil
}
// IsNull returns true if NoncurrentTransition doesn't refer to any storage-class.
// Note: It supports immediate transition, i.e zero noncurrent days.
func (n NoncurrentVersionTransition) IsNull() bool {
return n.StorageClass == ""
}
// Validate returns an error with wrong value
func (n NoncurrentVersionTransition) Validate() error {
if !n.set {
return nil
}
if n.StorageClass == "" {
return errXMLNotWellFormed
}
return nil
}
// NextDue returns upcoming NoncurrentVersionTransition date for obj if
// applicable, returns false otherwise.
func (n NoncurrentVersionTransition) NextDue(obj ObjectOpts) (time.Time, bool) {
if obj.IsLatest || n.StorageClass == "" {
return time.Time{}, false
}
// Days == 0 indicates immediate tiering, i.e object is eligible for tiering since it became noncurrent.
if n.NoncurrentDays == 0 {
return obj.SuccessorModTime, true
}
return ExpectedExpiryTime(obj.SuccessorModTime, int(n.NoncurrentDays)), true
}