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/*
* Copyright 2018 Intel Corporation, Inc
*
* 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 vnfd
import (
"k8splugin/db"
"log"
uuid "github.com/hashicorp/go-uuid"
pkgerrors "github.com/pkg/errors"
)
// VNFDefinition contains the parameters needed for VNF Definitions
// It implements the interface for managing the definitions
type VNFDefinition struct {
Name string `json:"name"`
Description string `json:"description"`
UUID string `json:"uuid,omitempty"`
ServiceType string `json:"service-type"`
}
// VNFDefinitionInterface is an interface exposes the VNFDefinition functionality
type VNFDefinitionInterface interface {
Create(vnfd VNFDefinition) (VNFDefinition, error)
List() ([]VNFDefinition, error)
Get(vnfID string) (VNFDefinition, error)
Delete(vnfID string) error
}
// VNFDefinitionClient implements the VNFDefinitionInterface
// It will also be used to maintain some localized state
type VNFDefinitionClient struct {
keyPrefix string
}
// GetVNFDClient Returns an instance of the VNFDefinitionClient
// which implements the VNFDefinitionInterface interface
func GetVNFDClient() *VNFDefinitionClient {
return &VNFDefinitionClient{
keyPrefix: "vnfd/"}
}
// Create creates an entry for the VNF in the database
func (v *VNFDefinitionClient) Create(vnfd VNFDefinition) (VNFDefinition, error) {
// If UUID is empty, we will generate one
if vnfd.UUID == "" {
vnfd.UUID, _ = uuid.GenerateUUID()
}
key := v.keyPrefix + vnfd.UUID
serData, err := db.Serialize(v)
if err != nil {
return VNFDefinition{}, pkgerrors.Wrap(err, "Serialize VNF Definition")
}
err = db.DBconn.CreateEntry(key, serData)
if err != nil {
return VNFDefinition{}, pkgerrors.Wrap(err, "Creating DB Entry")
}
return vnfd, nil
}
// List lists all vnf entries in the database
func (v *VNFDefinitionClient) List() ([]VNFDefinition, error) {
strArray, err := db.DBconn.ReadAll(v.keyPrefix)
if err != nil {
return []VNFDefinition{}, pkgerrors.Wrap(err, "Listing VNF Definitions")
}
var retData []VNFDefinition
for _, key := range strArray {
value, ok, err := db.DBconn.ReadEntry(key)
if err != nil {
log.Printf("Error Reading Key: %s", key)
continue
}
if ok {
vnfd := VNFDefinition{}
err = db.DeSerialize(value, &vnfd)
if err != nil {
log.Printf("Error Deserializing Value: %s", value)
continue
}
retData = append(retData, vnfd)
}
}
return retData, nil
}
// Get returns the VNF Definition for corresponding ID
func (v *VNFDefinitionClient) Get(vnfID string) (VNFDefinition, error) {
value, ok, err := db.DBconn.ReadEntry(v.keyPrefix + vnfID)
if err != nil {
return VNFDefinition{}, pkgerrors.Wrap(err, "Get VNF Definitions")
}
if ok {
vnfd := VNFDefinition{}
err = db.DeSerialize(value, &vnfd)
if err != nil {
return VNFDefinition{}, pkgerrors.Wrap(err, "Deserializing Value")
}
return vnfd, nil
}
return VNFDefinition{}, pkgerrors.New("Error getting VNF Definition")
}
// Delete deletes the VNF Definition from database
func (v *VNFDefinitionClient) Delete(vnfID string) error {
err := db.DBconn.DeleteEntry(v.keyPrefix + vnfID)
if err != nil {
return pkgerrors.Wrap(err, "Delete VNF Definitions")
}
return nil
}
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