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/*
* Copyright 2020 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 module
import (
pkgerrors "github.com/pkg/errors"
)
// KeyValue contains the parameters needed for a key value
type KeyValue struct {
MetaData KVMetaDataList `json:"metadata"`
Specification KVSpec `json:"spec"`
}
// MetaData contains the parameters needed for metadata
type KVMetaDataList struct {
KeyValueName string `json:"name"`
Description string `json:"description"`
UserData1 string `json:"userData1"`
UserData2 string `json:"userData2"`
}
// Spec contains the parameters needed for spec
type KVSpec struct {
Kv []map[string]interface{} `json:"kv"`
}
// KeyValueKey is the key structure that is used in the database
type KeyValueKey struct {
Project string `json:"project"`
LogicalCloudName string `json:"logical-cloud-name"`
KeyValueName string `json:"kvname"`
}
// KeyValueManager is an interface that exposes the connection
// functionality
type KeyValueManager interface {
CreateKVPair(project, logicalCloud string, c KeyValue) (KeyValue, error)
GetKVPair(project, logicalCloud, name string) (KeyValue, error)
GetAllKVPairs(project, logicalCloud string) ([]KeyValue, error)
DeleteKVPair(project, logicalCloud, name string) error
UpdateKVPair(project, logicalCloud, name string, c KeyValue) (KeyValue, error)
}
// KeyValueClient implements the KeyValueManager
// It will also be used to maintain some localized state
type KeyValueClient struct {
storeName string
tagMeta string
util Utility
}
// KeyValueClient returns an instance of the KeyValueClient
// which implements the KeyValueManager
func NewKeyValueClient() *KeyValueClient {
service := DBService{}
return &KeyValueClient{
storeName: "orchestrator",
tagMeta: "keyvalue",
util: service,
}
}
// Create entry for the key value resource in the database
func (v *KeyValueClient) CreateKVPair(project, logicalCloud string, c KeyValue) (KeyValue, error) {
//Construct key consisting of name
key := KeyValueKey{
Project: project,
LogicalCloudName: logicalCloud,
KeyValueName: c.MetaData.KeyValueName,
}
//Check if project exist
err := v.util.CheckProject(project)
if err != nil {
return KeyValue{}, pkgerrors.New("Unable to find the project")
}
//check if logical cloud exists
err = v.util.CheckLogicalCloud(project, logicalCloud)
if err != nil {
return KeyValue{}, pkgerrors.New("Unable to find the logical cloud")
}
//Check if this Key Value already exists
_, err = v.GetKVPair(project, logicalCloud, c.MetaData.KeyValueName)
if err == nil {
return KeyValue{}, pkgerrors.New("Key Value already exists")
}
err = v.util.DBInsert(v.storeName, key, nil, v.tagMeta, c)
if err != nil {
return KeyValue{}, pkgerrors.Wrap(err, "Creating DB Entry")
}
return c, nil
}
// Get returns Key Value for correspondin name
func (v *KeyValueClient) GetKVPair(project, logicalCloud, kvPairName string) (KeyValue, error) {
//Construct the composite key to select the entry
key := KeyValueKey{
Project: project,
LogicalCloudName: logicalCloud,
KeyValueName: kvPairName,
}
value, err := v.util.DBFind(v.storeName, key, v.tagMeta)
if err != nil {
return KeyValue{}, pkgerrors.Wrap(err, "Get Key Value")
}
//value is a byte array
if value != nil {
kv := KeyValue{}
err = v.util.DBUnmarshal(value[0], &kv)
if err != nil {
return KeyValue{}, pkgerrors.Wrap(err, "Unmarshaling value")
}
return kv, nil
}
return KeyValue{}, pkgerrors.New("Key Value does not exist")
}
// Get All lists all key value pairs
func (v *KeyValueClient) GetAllKVPairs(project, logicalCloud string) ([]KeyValue, error) {
//Construct the composite key to select the entry
key := KeyValueKey{
Project: project,
LogicalCloudName: logicalCloud,
KeyValueName: "",
}
var resp []KeyValue
values, err := v.util.DBFind(v.storeName, key, v.tagMeta)
if err != nil {
return []KeyValue{}, pkgerrors.Wrap(err, "Get Key Value")
}
for _, value := range values {
kv := KeyValue{}
err = v.util.DBUnmarshal(value, &kv)
if err != nil {
return []KeyValue{}, pkgerrors.Wrap(err, "Unmarshaling value")
}
resp = append(resp, kv)
}
return resp, nil
}
// Delete the Key Value entry from database
func (v *KeyValueClient) DeleteKVPair(project, logicalCloud, kvPairName string) error {
//Construct the composite key to select the entry
key := KeyValueKey{
Project: project,
LogicalCloudName: logicalCloud,
KeyValueName: kvPairName,
}
err := v.util.DBRemove(v.storeName, key)
if err != nil {
return pkgerrors.Wrap(err, "Delete Key Value")
}
return nil
}
// Update an entry for the Key Value in the database
func (v *KeyValueClient) UpdateKVPair(project, logicalCloud, kvPairName string, c KeyValue) (KeyValue, error) {
key := KeyValueKey{
Project: project,
LogicalCloudName: logicalCloud,
KeyValueName: kvPairName,
}
//Check if KV pair URl name is the same name in json
if c.MetaData.KeyValueName != kvPairName {
return KeyValue{}, pkgerrors.New("Update Error - KV pair name mismatch")
}
//Check if this Key Value exists
_, err := v.GetKVPair(project, logicalCloud, kvPairName)
if err != nil {
return KeyValue{}, pkgerrors.New("KV Pair does not exist")
}
err = v.util.DBInsert(v.storeName, key, nil, v.tagMeta, c)
if err != nil {
return KeyValue{}, pkgerrors.Wrap(err, "Updating DB Entry")
}
return c, nil
}
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