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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 rtcontext
import (
"fmt"
"github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/contextdb"
pkgerrors "github.com/pkg/errors"
"math/rand"
"strings"
"time"
)
const maxrand = 0x7fffffffffffffff
const prefix string = "/context/"
type RunTimeContext struct {
cid interface{}
}
type Rtcontext interface {
RtcInit() (interface{}, error)
RtcLoad(interface{}) (interface{}, error)
RtcCreate() (interface{}, error)
RtcGet() (interface{}, error)
RtcAddLevel(handle interface{}, level string, value string) (interface{}, error)
RtcAddResource(handle interface{}, resname string, value interface{}) (interface{}, error)
RtcAddInstruction(handle interface{}, level string, insttype string, value interface{}) (interface{}, error)
RtcDeletePair(handle interface{}) error
RtcDeletePrefix(handle interface{}) error
RtcGetHandles(handle interface{}) ([]interface{}, error)
RtcGetValue(handle interface{}, value interface{}) error
RtcUpdateValue(handle interface{}, value interface{}) error
}
//Intialize context by assiging a new id
func (rtc *RunTimeContext) RtcInit() (interface{}, error) {
if rtc.cid != nil {
return nil, pkgerrors.Errorf("Error, context already initialized")
}
ra := rand.New(rand.NewSource(time.Now().UnixNano()))
rn := ra.Int63n(maxrand)
id := fmt.Sprintf("%v", rn)
cid := (prefix + id + "/")
rtc.cid = interface{}(cid)
return interface{}(id), nil
}
//Load context using the given id
func (rtc *RunTimeContext) RtcLoad(id interface{}) (interface{}, error) {
str := fmt.Sprintf("%v", id)
if str == "" {
return nil, pkgerrors.Errorf("Not a valid context id")
}
cid := (prefix + str + "/")
rtc.cid = interface{}(cid)
handle, err := rtc.RtcGet()
if err != nil {
return nil, pkgerrors.Errorf("Error finding the context id: %s", err.Error())
}
return handle, nil
}
//Create context using the id and prefix
func (rtc *RunTimeContext) RtcCreate() (interface{}, error) {
cid := fmt.Sprintf("%v", rtc.cid)
if cid == "" {
return nil, pkgerrors.Errorf("Error, context not intialized")
}
if !strings.HasPrefix(cid, prefix) {
return nil, pkgerrors.Errorf("Not a valid run time context prefix")
}
id := strings.SplitN(cid, "/", 4)[2]
err := contextdb.Db.Put(cid, id)
if err != nil {
return nil, pkgerrors.Errorf("Error creating run time context: %s", err.Error())
}
return rtc.cid, nil
}
//Get the root handle
func (rtc *RunTimeContext) RtcGet() (interface{}, error) {
str := fmt.Sprintf("%v", rtc.cid)
if !strings.HasPrefix(str, prefix) {
return nil, pkgerrors.Errorf("Not a valid run time context")
}
var value string
err := contextdb.Db.Get(str, &value)
if err != nil {
return nil, pkgerrors.Errorf("Error getting run time context metadata: %s", err.Error())
}
if !strings.Contains(str, value) {
return nil, pkgerrors.Errorf("Error matching run time context metadata")
}
return rtc.cid, nil
}
//Add a new level at a given handle and return the new handle
func (rtc *RunTimeContext) RtcAddLevel(handle interface{}, level string, value string) (interface{}, error) {
str := fmt.Sprintf("%v", handle)
sid := fmt.Sprintf("%v", rtc.cid)
if !strings.HasPrefix(str, sid) {
return nil, pkgerrors.Errorf("Not a valid run time context handle")
}
if level == "" {
return nil, pkgerrors.Errorf("Not a valid run time context level")
}
if value == "" {
return nil, pkgerrors.Errorf("Not a valid run time context level value")
}
key := str + level + "/" + value + "/"
err := contextdb.Db.Put(key, value)
if err != nil {
return nil, pkgerrors.Errorf("Error adding run time context level: %s", err.Error())
}
return (interface{})(key), nil
}
// Add a resource under the given level and return new handle
func (rtc *RunTimeContext) RtcAddResource(handle interface{}, resname string, value interface{}) (interface{}, error) {
str := fmt.Sprintf("%v", handle)
sid := fmt.Sprintf("%v", rtc.cid)
if !strings.HasPrefix(str, sid) {
return nil, pkgerrors.Errorf("Not a valid run time context handle")
}
if resname == "" {
return nil, pkgerrors.Errorf("Not a valid run time context resource name")
}
if value == nil {
return nil, pkgerrors.Errorf("Not a valid run time context resource value")
}
k := str + "resource" + "/" + resname + "/"
err := contextdb.Db.Put(k, value)
if err != nil {
return nil, pkgerrors.Errorf("Error adding run time context resource: %s", err.Error())
}
return (interface{})(k), nil
}
// Add instruction at a given level and type, return the new handle
func (rtc *RunTimeContext) RtcAddInstruction(handle interface{}, level string, insttype string, value interface{}) (interface{}, error) {
str := fmt.Sprintf("%v", handle)
sid := fmt.Sprintf("%v", rtc.cid)
if !strings.HasPrefix(str, sid) {
return nil, pkgerrors.Errorf("Not a valid run time context handle")
}
if level == "" {
return nil, pkgerrors.Errorf("Not a valid run time context level")
}
if insttype == "" {
return nil, pkgerrors.Errorf("Not a valid run time context instruction type")
}
if value == nil {
return nil, pkgerrors.Errorf("Not a valid run time context instruction value")
}
k := str + level + "/" + "instruction" + "/" + insttype + "/"
err := contextdb.Db.Put(k, fmt.Sprintf("%v", value))
if err != nil {
return nil, pkgerrors.Errorf("Error adding run time context instruction: %s", err.Error())
}
return (interface{})(k), nil
}
//Delete the key value pair using given handle
func (rtc *RunTimeContext) RtcDeletePair(handle interface{}) error {
str := fmt.Sprintf("%v", handle)
sid := fmt.Sprintf("%v", rtc.cid)
if !strings.HasPrefix(str, sid) {
return pkgerrors.Errorf("Not a valid run time context handle")
}
err := contextdb.Db.Delete(str)
if err != nil {
return pkgerrors.Errorf("Error deleting run time context pair: %s", err.Error())
}
return nil
}
// Delete all handles underneath the given handle
func (rtc *RunTimeContext) RtcDeletePrefix(handle interface{}) error {
str := fmt.Sprintf("%v", handle)
sid := fmt.Sprintf("%v", rtc.cid)
if !strings.HasPrefix(str, sid) {
return pkgerrors.Errorf("Not a valid run time context handle")
}
err := contextdb.Db.DeleteAll(str)
if err != nil {
return pkgerrors.Errorf("Error deleting run time context with prefix: %s", err.Error())
}
return nil
}
// Return the list of handles under the given handle
func (rtc *RunTimeContext) RtcGetHandles(handle interface{}) ([]interface{}, error) {
str := fmt.Sprintf("%v", handle)
sid := fmt.Sprintf("%v", rtc.cid)
if !strings.HasPrefix(str, sid) {
return nil, pkgerrors.Errorf("Not a valid run time context handle")
}
s, err := contextdb.Db.GetAllKeys(str)
if err != nil {
return nil, pkgerrors.Errorf("Error getting run time context handles: %s", err.Error())
}
r := make([]interface{}, len(s))
for i, v := range s {
r[i] = v
}
return r, nil
}
// Get the value for a given handle
func (rtc *RunTimeContext) RtcGetValue(handle interface{}, value interface{}) error {
str := fmt.Sprintf("%v", handle)
sid := fmt.Sprintf("%v", rtc.cid)
if !strings.HasPrefix(str, sid) {
return pkgerrors.Errorf("Not a valid run time context handle")
}
err := contextdb.Db.Get(str, value)
if err != nil {
return pkgerrors.Errorf("Error getting run time context value: %s", err.Error())
}
return nil
}
// Update the value of a given handle
func (rtc *RunTimeContext) RtcUpdateValue(handle interface{}, value interface{}) error {
str := fmt.Sprintf("%v", handle)
sid := fmt.Sprintf("%v", rtc.cid)
if !strings.HasPrefix(str, sid) {
return pkgerrors.Errorf("Not a valid run time context handle")
}
err := contextdb.Db.Put(str, value)
if err != nil {
return pkgerrors.Errorf("Error updating run time context value: %s", err.Error())
}
return nil
}
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