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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 rb
import (
"k8splugin/db"
"log"
uuid "github.com/hashicorp/go-uuid"
pkgerrors "github.com/pkg/errors"
)
// Definition contains the parameters needed for resource bundle (rb) definitions
// It implements the interface for managing the definitions
type Definition struct {
Name string `json:"name"`
Description string `json:"description"`
UUID string `json:"uuid,omitempty"`
ServiceType string `json:"service-type"`
}
// DefinitionManager is an interface exposes the resource bundle definition functionality
type DefinitionManager interface {
Create(def Definition) (Definition, error)
List() ([]Definition, error)
Get(resID string) (Definition, error)
Delete(resID string) error
}
// DefinitionClient implements the DefinitionManager
// It will also be used to maintain some localized state
type DefinitionClient struct {
keyPrefix string
}
// NewDefinitionClient returns an instance of the DefinitionClient
// which implements the DefinitionManager
// Uses rb/def prefix
func NewDefinitionClient() *DefinitionClient {
return &DefinitionClient{
keyPrefix: "rb/def/"}
}
// Create an entry for the resource in the database
func (v *DefinitionClient) Create(def Definition) (Definition, error) {
// If UUID is empty, we will generate one
if def.UUID == "" {
def.UUID, _ = uuid.GenerateUUID()
}
key := v.keyPrefix + def.UUID
serData, err := db.Serialize(v)
if err != nil {
return Definition{}, pkgerrors.Wrap(err, "Serialize Resource Bundle Definition")
}
err = db.DBconn.Create(key, serData)
if err != nil {
return Definition{}, pkgerrors.Wrap(err, "Creating DB Entry")
}
return def, nil
}
// List all resource entries in the database
func (v *DefinitionClient) List() ([]Definition, error) {
strArray, err := db.DBconn.ReadAll(v.keyPrefix)
if err != nil {
return []Definition{}, pkgerrors.Wrap(err, "Listing Resource Bundle Definitions")
}
var retData []Definition
for _, key := range strArray {
value, err := db.DBconn.Read(key)
if err != nil {
log.Printf("Error Reading Key: %s", key)
continue
}
if value != "" {
def := Definition{}
err = db.DeSerialize(value, &def)
if err != nil {
log.Printf("Error Deserializing Value: %s", value)
continue
}
retData = append(retData, def)
}
}
return retData, nil
}
// Get returns the Resource Bundle Definition for corresponding ID
func (v *DefinitionClient) Get(id string) (Definition, error) {
value, err := db.DBconn.Read(v.keyPrefix + id)
if err != nil {
return Definition{}, pkgerrors.Wrap(err, "Get Resource Bundle definition")
}
if value != "" {
def := Definition{}
err = db.DeSerialize(value, &def)
if err != nil {
return Definition{}, pkgerrors.Wrap(err, "Deserializing Value")
}
return def, nil
}
return Definition{}, pkgerrors.New("Error getting Resource Bundle Definition")
}
// Delete the Resource Bundle definition from database
func (v *DefinitionClient) Delete(id string) error {
err := db.DBconn.Delete(v.keyPrefix + id)
if err != nil {
return pkgerrors.Wrap(err, "Delete Resource Bundle Definitions")
}
return nil
}
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