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// Copyright 2023 Deutsche Telekom AG, Orange
//
// 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 main
import (
"net/http"
"time"
"github.com/labstack/echo"
uuid "github.com/satori/go.uuid"
)
//describes the loop state in term of policy and DCAE
type State struct {
ComponentState struct {
StateName string `json:"stateName"`
} `json:"componentState"`
}
//describes entity id in CLAMP got from SDC
type Resource struct {
ResourceID struct {
VfModuleModelName string `json:"vfModuleModelName"`
VfModuleModelInvariantUUID string `json:"vfModuleModelInvariantUUID"`
VfModuleModelUUID string `json:"vfModuleModelUUID"`
VfModuleModelVersion string `json:"vfModuleModelVersion"`
VfModuleModelCustomizationUUID string `json:"vfModuleModelCustomizationUUID"`
} `json:"resourceID"`
}
//frequency limiter configuration
type Frequency_payload struct {
ID string `json:"id"`
Actor string `json:"actor"`
Operation string `json:"operation"`
Limit int `json:"limit"`
TimeWindow int `json:"timeWindow"`
TimeUnits string `json:"timeUnits"`
}
/*
//describes operational policy configuration in CLAMP
type OperationalPolicy struct {
Name string `json:"name"`
PolicyModel Policy `json:"policyModel"`
ConfigurationsJson struct{ Frequency_payload } `json:"configurationsJson"` //depends on operational policy model
}
*/
//describes TCA POLICY in CLAMP
type Tca_policy struct {
Domain string `json:"Domain"`
MetricsPerEventName []struct {
PolicyScope string `json:"policyScope"`
Thresholds []struct {
Version string `json:"version"`
Severity string `json:"severity"`
ThresholdValue int `json:"thresholdValue"`
ClosedLoopEventStatus string `json:"closedLoopEventStatus"`
ClosedLoopControlName string `json:"closedLoopControlName"`
Direction string `json:"direction"`
FieldPath string `json:"fieldPath"`
} `json:"thresholds"`
EventName string `json:"eventName"`
PolicyVersion string `json:"policyVersion"`
ControlLoopSchemaType string `json:"controlLoopSchemaType"`
PolicyName string `json:"policyName"`
} `json:"metricsPerEventName"`
}
//describes TCA POLICY payload in CLAMP
type Tca_policy_struct struct {
TcaPolicy Tca_policy `json:"tca.policy"`
}
//describes microservice policy configuration in CLAMP
type MicroServicePolicy struct {
Name string `json:"name"`
ConfigurationsJson Tca_policy_struct `json:"configurationsJson"`
PdpGroup string `json:"pdpGroup"`
PdpSubgroup string `json:"pdpSubgroup"`
}
//LoopDetails describes loop innstance in CLAMP
type LoopDetails struct {
Name string `json:"name"`
Template LoopTemplate `json:"loopTemplate"`
GlobalPropertiesJSON struct {
DcaeDeployParameters struct {
UniqueBlueprintParameters struct {
PolicyID string `json:"policy_id"`
} `json:"uniqueBlueprintParameters"`
} `json:"dcaeDeployParameters"`
} `json:"globalPropertiesJson"`
LoopElementModelsUsed []string `json:"loopElementModelsUsed"` //microservices from sdc
Components struct {
POLICY State `json:"POLICY"`
DCAE State `json:"DCAE"`
} `json:"components"`
ModelService struct {
ResourceDetails struct {
VFModule Resource `json:"VFModule"`
} `json:"resourceDetails"`
} `json:"modelService"`
OperationalPolicies []OperationalPolicy_payload `json:"operationalPolicies"`
MicroServicePolicies []MicroServicePolicy `json:"microServicePolicies"`
}
var loopInstanceList []LoopDetails
func generateInitialLoopInstances() {
loopInstanceList = nil
loop1 := new(LoopDetails)
loop1.Template = templateList[0]
loop1.Name = "intance_template01"
loopInstanceList = append(loopInstanceList, *loop1)
loop2 := new(LoopDetails)
loop2.Name = "intance_template02"
loop2.Template = templateList[1]
loopInstanceList = append(loopInstanceList, *loop2)
}
func updateLoopDetails(c echo.Context) error {
loopID := c.Param("loopID")
for _, loop := range loopInstanceList {
if loop.Name == loopID {
return c.JSON(http.StatusOK, loop)
}
}
return c.JSON(http.StatusNotFound, ClampError{
Message: "No ClosedLoop found",
Error: "Not Found",
Status: "404"})
}
func createLoopInstance(c echo.Context) error {
loopID := c.Param("loopID")
templateName := c.QueryParam("templateName")
loop := new(LoopDetails)
//must add the constraint of limit number of instances for a template
for _, l := range loopInstanceList {
if l.Name == loopID &&
l.Template.Name == templateName {
//in reality it's overwritten
return c.JSON(http.StatusBadRequest, ClampError{
Message: "loop of same Name and for same template exists",
Error: "Exists",
Status: "500"})
}
}
loop.Name = loopID
loop.Template.Name = templateName
//For drools configuration
resource := new(Resource)
resource.ResourceID.VfModuleModelUUID = uuid.NewV4().String()
resource.ResourceID.VfModuleModelName = uuid.NewV4().String()
resource.ResourceID.VfModuleModelInvariantUUID = uuid.NewV4().String()
resource.ResourceID.VfModuleModelVersion = uuid.NewV4().String()
resource.ResourceID.VfModuleModelCustomizationUUID = uuid.NewV4().String()
loop.ModelService.ResourceDetails.VFModule = *resource
//must generate as much microservices as tca blueprints count
loop.LoopElementModelsUsed = append(loop.LoopElementModelsUsed, "microservice01")
nb_microservices := len(loop.LoopElementModelsUsed)
for i := 0; i < nb_microservices; i++ {
loop.MicroServicePolicies = append(loop.MicroServicePolicies, MicroServicePolicy{
Name: "Microservice" + uuid.NewV4().String(),
})
}
loop.GlobalPropertiesJSON.DcaeDeployParameters.UniqueBlueprintParameters.PolicyID = "Microservice" + uuid.NewV4().String()
state := new(State)
state.ComponentState.StateName = "NOT_SENT"
loop.Components.POLICY = *state
state.ComponentState.StateName = "BLUEPRINT_DEPLOYED"
loop.Components.DCAE = *state
loopInstanceList = append(loopInstanceList, *loop)
return c.JSON(http.StatusCreated, *loop)
}
func addOperationaPolicy(c echo.Context) error {
loopID := c.Param("loopID")
policyType := c.Param("policyType")
policyVersion := c.Param("policyVersion")
op_policy := new(struct {
PolicyModelType string `json:"policyModelType"`
Version string `json:"version"`
PolicyAcronym string `json:"policyAcronym"`
PolicyPdpGroup struct {
SupportedPdpGroups []struct {
DefaultGroup []string `json:"defaultGroup"`
} `json:"supportedPdpGroups"`
} `json:"policyPdpGroup"`
CreatedDate time.Time `json:"createdDate"`
UpdatedDate time.Time `json:"updatedDate"`
UpdatedBy string `json:"updatedBy"`
CreatedBy string `json:"createdBy"`
})
for _, p := range policyList {
if p.PolicyModelType == policyType &&
p.Version == policyVersion {
for j, l := range loopInstanceList {
if l.Name == loopID {
op_policy.PolicyAcronym = p.PolicyAcronym
loopInstanceList[j].OperationalPolicies = append(loopInstanceList[j].OperationalPolicies,
OperationalPolicy_payload{
Name: "OPERATIONAL" + uuid.NewV4().String(),
PolicyModel: *op_policy,
})
return c.JSON(http.StatusOK, loopInstanceList[j])
}
}
return c.JSON(http.StatusBadRequest, ClampError{
Message: "loop not found",
Error: "Not Found",
Status: "404"})
}
}
return c.JSON(http.StatusBadRequest, ClampError{
Message: "Policy not found",
Error: "Not Found",
Status: "404"})
}
//remove operation is not working in the real CLAMP
func removeOperationaPolicy(c echo.Context) error {
loopID := c.Param("loopID")
policyType := c.Param("policyType")
policyVersion := c.Param("policyVersion")
for j, l := range loopInstanceList {
if l.Name == loopID {
for i, pp := range l.OperationalPolicies {
if pp.PolicyModel.PolicyModelType == policyType &&
pp.PolicyModel.Version == policyVersion {
loopInstanceList[j].OperationalPolicies = append(loopInstanceList[j].OperationalPolicies[:i],
loopInstanceList[j].OperationalPolicies[i+1:]...)
return c.JSON(http.StatusOK, l)
}
}
return c.JSON(http.StatusBadRequest, ClampError{
Message: "Policy not found",
Error: "Not Found",
Status: "404"})
}
}
return c.JSON(http.StatusBadRequest, ClampError{
Message: "loop not found",
Error: "Not Found",
Status: "404"})
}
//must review tca_policy struct
func addTcaConfig(c echo.Context) error {
loopID := c.Param("loopID")
data := new(MicroServicePolicy)
if err := c.Bind(data); err != nil {
return err
}
for j, l := range loopInstanceList {
if l.Name == loopID {
if l.MicroServicePolicies != nil {
for i, _ := range l.MicroServicePolicies {
loopInstanceList[j].MicroServicePolicies[i] = *data
}
return c.JSON(http.StatusOK, loopInstanceList[j].MicroServicePolicies[0])
}
return c.JSON(http.StatusBadRequest, ClampError{
Message: "Microservice policy not found",
Error: "Not Found",
Status: "404"})
}
}
return c.JSON(http.StatusBadRequest, ClampError{
Message: "Loop not found",
Error: "Not Found",
Status: "404"})
}
func addOperationalPolicyConfig(c echo.Context) error {
loopID := c.Param("loopID")
for j, l := range loopInstanceList {
if l.Name == loopID {
/*
//cannot bind a list as said in labstack echo bind
data := new([]OperationalPolicy_payload)
if err := c.Bind(data); err != nil {
return err
}
*/
if l.OperationalPolicies != nil {
//loopInstanceList[j].OperationalPolicies = *data
loopInstanceList[j].OperationalPolicies[len(l.OperationalPolicies)-1].ConfigurationsJSON.Actor = "Test"
return c.JSON(http.StatusOK, loopInstanceList[j])
}
return c.JSON(http.StatusBadRequest, ClampError{
Message: "Operational Policy not found",
Error: "Not Found",
Status: "404"})
}
}
return c.JSON(http.StatusBadRequest, ClampError{
Message: "Loop not found",
Error: "Not Found",
Status: "404"})
}
//util function
func checkPoliciesConfiguration(l LoopDetails) bool {
var empty struct {
Actor string `json:"actor"`
Operation string `json:"operation"`
Limit int `json:"limit"`
TimeWindow int `json:"timeWindow"`
TimeUnits string `json:"timeUnits"`
}
for i, _ := range l.MicroServicePolicies {
if l.MicroServicePolicies[i].ConfigurationsJson.TcaPolicy.Domain == "" {
return false
}
}
for i, _ := range l.OperationalPolicies {
if l.OperationalPolicies[i].ConfigurationsJSON == empty {
return false
}
}
return true
}
func putLoopAction(c echo.Context) error {
action := c.Param("action")
loopID := c.Param("loopID")
state := new(State)
for j, l := range loopInstanceList {
if l.Name == loopID {
//POLICY actions
if action == "submit" {
if checkPoliciesConfiguration(loopInstanceList[j]) {
state.ComponentState.StateName = "SENT_AND_DEPLOYED"
loopInstanceList[j].Components.POLICY = *state
return c.JSON(http.StatusOK, loopInstanceList[j].Components.POLICY.ComponentState)
}
return c.JSON(http.StatusBadRequest, ClampError{
Message: "Policies are not well Configured",
Error: "Bad Action",
Status: "401"})
}
if action == "stop" {
if l.Components.POLICY.ComponentState.StateName == "NOT_SENT" {
return c.JSON(http.StatusBadRequest, ClampError{
Message: "Cannot perform this action",
Error: "Bad Action",
Status: "400"})
}
state.ComponentState.StateName = "SENT"
loopInstanceList[j].Components.POLICY = *state
return c.JSON(http.StatusOK, "{}")
}
if action == "restart" {
state.ComponentState.StateName = "SENT_AND_DEPLOYED"
loopInstanceList[j].Components.POLICY = *state
return c.JSON(http.StatusOK, "{}")
}
//DCAE actions
if action == "deploy" {
//must add deploy failure
state.ComponentState.StateName = "MICROSERVICE_INSTALLED_SUCCESSFULLY"
loopInstanceList[j].Components.DCAE = *state
return c.JSON(http.StatusOK, "{}")
}
if action == "undeploy" {
state.ComponentState.StateName = "MICROSERVICE_UNINSTALLED_SUCCESSFULLY"
loopInstanceList[j].Components.DCAE = *state
return c.JSON(http.StatusOK, "{}")
}
//LOOP action
if action == "delete" {
loopInstanceList = append(loopInstanceList[:j], loopInstanceList[j+1:]...)
return c.JSON(http.StatusOK, "{}")
}
//action failure
return c.JSON(http.StatusBadRequest, ClampError{
Message: "Cannot perform this action",
Error: "Bad Action",
Status: "400"})
}
}
return c.JSON(http.StatusBadRequest, ClampError{
Message: "Loop not found",
Error: "Not Found",
Status: "404"})
}
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