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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 (
"encoding/json"
"github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/db"
log "github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/logutils"
rpc "github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/rpc"
pkgerrors "github.com/pkg/errors"
)
// Controller contains the parameters needed for Controllers
// It implements the interface for managing the Controllers
type Controller struct {
Metadata Metadata `json:"metadata"`
Spec ControllerSpec `json:"spec"`
}
type ControllerSpec struct {
Host string `json:"host"`
Port int `json:"port"`
Type string `json:"type"`
Priority int `json:"priority"`
}
const MinControllerPriority = 1
const MaxControllerPriority = 1000000
const CONTROLLER_TYPE_ACTION string = "action"
const CONTROLLER_TYPE_PLACEMENT string = "placement"
var CONTROLLER_TYPES = [...]string{CONTROLLER_TYPE_ACTION, CONTROLLER_TYPE_PLACEMENT}
// ControllerKey is the key structure that is used in the database
type ControllerKey struct {
ControllerName string `json:"controller-name"`
}
// We will use json marshalling to convert to string to
// preserve the underlying structure.
func (mk ControllerKey) String() string {
out, err := json.Marshal(mk)
if err != nil {
return ""
}
return string(out)
}
// ControllerManager is an interface exposes the Controller functionality
type ControllerManager interface {
CreateController(ms Controller, mayExist bool) (Controller, error)
GetController(name string) (Controller, error)
GetControllers() ([]Controller, error)
InitControllers()
DeleteController(name string) error
}
// ControllerClient implements the Manager
// It will also be used to maintain some localized state
type ControllerClient struct {
collectionName string
tagMeta string
}
// NewControllerClient returns an instance of the ControllerClient
// which implements the Manager
func NewControllerClient() *ControllerClient {
return &ControllerClient{
collectionName: "controller",
tagMeta: "controllermetadata",
}
}
// CreateController a new collection based on the Controller
func (mc *ControllerClient) CreateController(m Controller, mayExist bool) (Controller, error) {
//Construct the composite key to select the entry
key := ControllerKey{
ControllerName: m.Metadata.Name,
}
//Check if this Controller already exists
_, err := mc.GetController(m.Metadata.Name)
if err == nil && !mayExist {
return Controller{}, pkgerrors.New("Controller already exists")
}
err = db.DBconn.Insert(mc.collectionName, key, nil, mc.tagMeta, m)
if err != nil {
return Controller{}, pkgerrors.Wrap(err, "Creating DB Entry")
}
// send message to create/update the rpc connection
rpc.UpdateRpcConn(m.Metadata.Name, m.Spec.Host, m.Spec.Port)
return m, nil
}
// GetController returns the Controller for corresponding name
func (mc *ControllerClient) GetController(name string) (Controller, error) {
//Construct the composite key to select the entry
key := ControllerKey{
ControllerName: name,
}
value, err := db.DBconn.Find(mc.collectionName, key, mc.tagMeta)
if err != nil {
return Controller{}, pkgerrors.Wrap(err, "Get Controller")
}
if value != nil {
microserv := Controller{}
err = db.DBconn.Unmarshal(value[0], µserv)
if err != nil {
return Controller{}, pkgerrors.Wrap(err, "Unmarshaling Value")
}
return microserv, nil
}
return Controller{}, pkgerrors.New("Error getting Controller")
}
// GetControllers returns all the Controllers that are registered
func (mc *ControllerClient) GetControllers() ([]Controller, error) {
//Construct the composite key to select the entry
key := ControllerKey{
ControllerName: "",
}
var resp []Controller
values, err := db.DBconn.Find(mc.collectionName, key, mc.tagMeta)
if err != nil {
return []Controller{}, pkgerrors.Wrap(err, "Get Controller")
}
for _, value := range values {
microserv := Controller{}
err = db.DBconn.Unmarshal(value, µserv)
if err != nil {
return []Controller{}, pkgerrors.Wrap(err, "Unmarshaling Value")
}
resp = append(resp, microserv)
}
return resp, nil
}
// DeleteController the Controller from database
func (mc *ControllerClient) DeleteController(name string) error {
//Construct the composite key to select the entry
key := ControllerKey{
ControllerName: name,
}
err := db.DBconn.Remove(mc.collectionName, key)
if err != nil {
return pkgerrors.Wrap(err, "Delete Controller Entry;")
}
// send message to close rpc connection
rpc.RemoveRpcConn(name)
return nil
}
// InitControllers initializes connctions for controllers in the DB
func (mc *ControllerClient) InitControllers() {
vals, _ := mc.GetControllers()
for _, v := range vals {
log.Info("Initializing RPC connection for controller", log.Fields{
"Controller": v.Metadata.Name,
})
rpc.UpdateRpcConn(v.Metadata.Name, v.Spec.Host, v.Spec.Port)
}
}
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