90 lines
1.7 KiB
Go
90 lines
1.7 KiB
Go
package cache
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import (
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"strings"
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"sync"
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"github.com/container-storage-interface/spec/lib/go/csi"
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)
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type SnapshotCache interface {
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Add(snapshot Snapshot)
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Delete(i int)
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List(ready bool) []csi.Snapshot
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FindSnapshot(k, v string) (int, Snapshot)
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}
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type Snapshot struct {
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Name string
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Parameters map[string]string
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SnapshotCSI csi.Snapshot
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}
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type snapshotCache struct {
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snapshotsRWL sync.RWMutex
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snapshots []Snapshot
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}
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func NewSnapshotCache() SnapshotCache {
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return &snapshotCache{
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snapshots: make([]Snapshot, 0),
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}
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}
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func (snap *snapshotCache) Add(snapshot Snapshot) {
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snap.snapshotsRWL.Lock()
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defer snap.snapshotsRWL.Unlock()
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snap.snapshots = append(snap.snapshots, snapshot)
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}
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func (snap *snapshotCache) Delete(i int) {
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snap.snapshotsRWL.Lock()
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defer snap.snapshotsRWL.Unlock()
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copy(snap.snapshots[i:], snap.snapshots[i+1:])
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snap.snapshots = snap.snapshots[:len(snap.snapshots)-1]
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}
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func (snap *snapshotCache) List(ready bool) []csi.Snapshot {
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snap.snapshotsRWL.RLock()
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defer snap.snapshotsRWL.RUnlock()
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snapshots := make([]csi.Snapshot, 0)
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for _, v := range snap.snapshots {
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if v.SnapshotCSI.GetReadyToUse() {
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snapshots = append(snapshots, v.SnapshotCSI)
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}
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}
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return snapshots
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}
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func (snap *snapshotCache) FindSnapshot(k, v string) (int, Snapshot) {
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snap.snapshotsRWL.RLock()
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defer snap.snapshotsRWL.RUnlock()
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snapshotIdx := -1
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for i, vi := range snap.snapshots {
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switch k {
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case "id":
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if strings.EqualFold(v, vi.SnapshotCSI.GetSnapshotId()) {
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return i, vi
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}
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case "sourceVolumeId":
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if strings.EqualFold(v, vi.SnapshotCSI.SourceVolumeId) {
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return i, vi
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}
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case "name":
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if vi.Name == v {
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return i, vi
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}
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}
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}
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return snapshotIdx, Snapshot{}
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}
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