/
infodata.go
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/
infodata.go
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/*
* Copyright 2020 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
*
* 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 infodata
import (
"fmt"
"sync"
gardencorev1alpha1 "github.com/gardener/gardener/pkg/apis/core/v1alpha1"
gardencorev1alpha1helper "github.com/gardener/gardener/pkg/apis/core/v1alpha1/helper"
"k8s.io/apimachinery/pkg/runtime"
)
// TypeVersion is the potentially versioned type name of an InfoData representation.
type TypeVersion string
// Unmarshaller is a factory to create a dedicated InfoData object from a byte stream
type Unmarshaller func(data []byte) (InfoData, error)
// InfoData is an interface
type InfoData interface {
TypeVersion() TypeVersion
Marshal() ([]byte, error)
}
var lock sync.Mutex
var types = map[TypeVersion]Unmarshaller{}
// Register is used to register new InfoData type versions
func Register(typeversion TypeVersion, unmarshaller Unmarshaller) {
lock.Lock()
defer lock.Unlock()
types[typeversion] = unmarshaller
}
// GetUnmarshaller returns an Unmarshaller for the given typeName.
func GetUnmarshaller(typeName TypeVersion) Unmarshaller {
lock.Lock()
defer lock.Unlock()
return types[typeName]
}
// Unmarshal unmarshals a GardenerResourceData into its respective Go struct representation
func Unmarshal(entry *gardencorev1alpha1.GardenerResourceData) (InfoData, error) {
unmarshaller := GetUnmarshaller(TypeVersion(entry.Type))
if unmarshaller == nil {
return nil, fmt.Errorf("unknown info data type %q", entry.Type)
}
data, err := unmarshaller(entry.Data.Raw)
if err != nil {
return nil, fmt.Errorf("cannot unmarshal data set %q of type %q: %s", entry.Name, entry.Type, err)
}
return data, nil
}
// GetInfoData retrieves the go representation of an object from the GardenerResourceDataList
func GetInfoData(resourceDataList gardencorev1alpha1helper.GardenerResourceDataList, name string) (InfoData, error) {
resourceData := resourceDataList.Get(name)
if resourceData == nil {
return nil, nil
}
return Unmarshal(resourceData)
}
// UpsertInfoData updates or inserts an InfoData object into the GardenerResourceDataList
func UpsertInfoData(resourceDataList *gardencorev1alpha1helper.GardenerResourceDataList, name string, data InfoData) error {
bytes, err := data.Marshal()
if err != nil {
return err
}
gardenerResourceData := &gardencorev1alpha1.GardenerResourceData{
Name: name,
Type: string(data.TypeVersion()),
Data: runtime.RawExtension{Raw: bytes},
}
resourceDataList.Upsert(gardenerResourceData)
return nil
}