mirror of https://github.com/portainer/portainer
67 lines
1.3 KiB
Go
67 lines
1.3 KiB
Go
|
package version
|
||
|
|
|
||
|
|
import (
|
||
|
|
"strconv"
|
||
|
|
|
||
|
|
"github.com/boltdb/bolt"
|
||
|
|
"github.com/portainer/portainer"
|
||
|
|
"github.com/portainer/portainer/bolt/internal"
|
||
|
|
)
|
||
|
|
|
||
|
|
const (
|
||
|
|
// BucketName represents the name of the bucket where this service stores data.
|
||
|
|
BucketName = "version"
|
||
|
|
versionKey = "DB_VERSION"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Service represents a service to manage stored versions.
|
||
|
|
type Service struct {
|
||
|
|
db *bolt.DB
|
||
|
|
}
|
||
|
|
|
||
|
|
// NewService creates a new instance of a service.
|
||
|
|
func NewService(db *bolt.DB) (*Service, error) {
|
||
|
|
err := internal.CreateBucket(db, BucketName)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
|
||
|
|
return &Service{
|
||
|
|
db: db,
|
||
|
|
}, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// DBVersion retrieves the stored database version.
|
||
|
|
func (service *Service) DBVersion() (int, error) {
|
||
|
|
var data []byte
|
||
|
|
|
||
|
|
err := service.db.View(func(tx *bolt.Tx) error {
|
||
|
|
bucket := tx.Bucket([]byte(BucketName))
|
||
|
|
|
||
|
|
value := bucket.Get([]byte(versionKey))
|
||
|
|
if value == nil {
|
||
|
|
return portainer.ErrObjectNotFound
|
||
|
|
}
|
||
|
|
|
||
|
|
data = make([]byte, len(value))
|
||
|
|
copy(data, value)
|
||
|
|
|
||
|
|
return nil
|
||
|
|
})
|
||
|
|
if err != nil {
|
||
|
|
return 0, err
|
||
|
|
}
|
||
|
|
|
||
|
|
return strconv.Atoi(string(data))
|
||
|
|
}
|
||
|
|
|
||
|
|
// StoreDBVersion store the database version.
|
||
|
|
func (service *Service) StoreDBVersion(version int) error {
|
||
|
|
return service.db.Update(func(tx *bolt.Tx) error {
|
||
|
|
bucket := tx.Bucket([]byte(BucketName))
|
||
|
|
|
||
|
|
data := []byte(strconv.Itoa(version))
|
||
|
|
return bucket.Put([]byte(versionKey), data)
|
||
|
|
})
|
||
|
|
}
|