mirror of https://github.com/portainer/portainer
97 lines
2.3 KiB
Go
97 lines
2.3 KiB
Go
package internal
|
|
|
|
import (
|
|
"encoding/binary"
|
|
|
|
"github.com/boltdb/bolt"
|
|
"github.com/portainer/portainer/api/bolt/errors"
|
|
)
|
|
|
|
// Itob returns an 8-byte big endian representation of v.
|
|
// This function is typically used for encoding integer IDs to byte slices
|
|
// so that they can be used as BoltDB keys.
|
|
func Itob(v int) []byte {
|
|
b := make([]byte, 8)
|
|
binary.BigEndian.PutUint64(b, uint64(v))
|
|
return b
|
|
}
|
|
|
|
// CreateBucket is a generic function used to create a bucket inside a bolt database.
|
|
func CreateBucket(db *bolt.DB, bucketName string) error {
|
|
return db.Update(func(tx *bolt.Tx) error {
|
|
_, err := tx.CreateBucketIfNotExists([]byte(bucketName))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
})
|
|
}
|
|
|
|
// GetObject is a generic function used to retrieve an unmarshalled object from a bolt database.
|
|
func GetObject(db *bolt.DB, bucketName string, key []byte, object interface{}) error {
|
|
var data []byte
|
|
|
|
err := db.View(func(tx *bolt.Tx) error {
|
|
bucket := tx.Bucket([]byte(bucketName))
|
|
|
|
value := bucket.Get(key)
|
|
if value == nil {
|
|
return errors.ErrObjectNotFound
|
|
}
|
|
|
|
data = make([]byte, len(value))
|
|
copy(data, value)
|
|
|
|
return nil
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return UnmarshalObject(data, object)
|
|
}
|
|
|
|
// UpdateObject is a generic function used to update an object inside a bolt database.
|
|
func UpdateObject(db *bolt.DB, bucketName string, key []byte, object interface{}) error {
|
|
return db.Update(func(tx *bolt.Tx) error {
|
|
bucket := tx.Bucket([]byte(bucketName))
|
|
|
|
data, err := MarshalObject(object)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
err = bucket.Put(key, data)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
})
|
|
}
|
|
|
|
// DeleteObject is a generic function used to delete an object inside a bolt database.
|
|
func DeleteObject(db *bolt.DB, bucketName string, key []byte) error {
|
|
return db.Update(func(tx *bolt.Tx) error {
|
|
bucket := tx.Bucket([]byte(bucketName))
|
|
return bucket.Delete(key)
|
|
})
|
|
}
|
|
|
|
// GetNextIdentifier is a generic function that returns the specified bucket identifier incremented by 1.
|
|
func GetNextIdentifier(db *bolt.DB, bucketName string) int {
|
|
var identifier int
|
|
|
|
db.Update(func(tx *bolt.Tx) error {
|
|
bucket := tx.Bucket([]byte(bucketName))
|
|
id, err := bucket.NextSequence()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
identifier = int(id)
|
|
return nil
|
|
})
|
|
|
|
return identifier
|
|
}
|