APIs for network, workload and interface intents

Includes network controller intent and underlying
network workload intent and workload interface
intent APIs.

Issue-ID: MULTICLOUD-1029
Signed-off-by: Eric Multanen <eric.w.multanen@intel.com>
Change-Id: I9bb34e42785b16f39af81335b1f94dd5bb15d931

1 files changed, 181 insertions, 0 deletions

diff --git a/src/ncm/pkg/module/workloadintent.go b/src/ncm/pkg/module/workloadintent.go
new file mode 100644
index 00000000..e6916954
--- /dev/null
+++ b/src/ncm/pkg/module/workloadintent.go
@@ -0,0 +1,181 @@
+/*
+ * 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 (
+	"github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/db"
+
+	pkgerrors "github.com/pkg/errors"
+)
+
+// WorkloadIntent contains the parameters needed for dynamic networks
+type WorkloadIntent struct {
+	Metadata Metadata           `json:"metadata"`
+	Spec     WorkloadIntentSpec `json:"spec"`
+}
+
+type WorkloadIntentSpec struct {
+	AppName          string `json:"application-name"`
+	WorkloadResource string `json:"workload-resource"`
+	Type             string `json:"type"`
+}
+
+// WorkloadIntentKey is the key structure that is used in the database
+type WorkloadIntentKey struct {
+	Project             string `json:"provider"`
+	CompositeApp        string `json:"compositeapp"`
+	CompositeAppVersion string `json:"compositeappversion"`
+	NetControlIntent    string `json:"netcontrolintent"`
+	WorkloadIntent      string `json:"workloadintent"`
+}
+
+// Manager is an interface exposing the WorkloadIntent functionality
+type WorkloadIntentManager interface {
+	CreateWorkloadIntent(wi WorkloadIntent, project, compositeapp, compositeappversion, netcontrolintent string, exists bool) (WorkloadIntent, error)
+	GetWorkloadIntent(name, project, compositeapp, compositeappversion, netcontrolintent string) (WorkloadIntent, error)
+	GetWorkloadIntents(project, compositeapp, compositeappversion, netcontrolintent string) ([]WorkloadIntent, error)
+	DeleteWorkloadIntent(name, project, compositeapp, compositeappversion, netcontrolintent string) error
+}
+
+// WorkloadIntentClient implements the Manager
+// It will also be used to maintain some localized state
+type WorkloadIntentClient struct {
+	db ClientDbInfo
+}
+
+// NewWorkloadIntentClient returns an instance of the WorkloadIntentClient
+// which implements the Manager
+func NewWorkloadIntentClient() *WorkloadIntentClient {
+	return &WorkloadIntentClient{
+		db: ClientDbInfo{
+			storeName: "orchestrator",
+			tagMeta:   "workloadintentmetadata",
+		},
+	}
+}
+
+// CreateWorkloadIntent - create a new WorkloadIntent
+func (v *WorkloadIntentClient) CreateWorkloadIntent(wi WorkloadIntent, project, compositeapp, compositeappversion, netcontrolintent string, exists bool) (WorkloadIntent, error) {
+
+	//Construct key and tag to select the entry
+	key := WorkloadIntentKey{
+		Project:             project,
+		CompositeApp:        compositeapp,
+		CompositeAppVersion: compositeappversion,
+		NetControlIntent:    netcontrolintent,
+		WorkloadIntent:      wi.Metadata.Name,
+	}
+
+	//Check if the Network Control Intent exists
+	_, err := NewNetControlIntentClient().GetNetControlIntent(netcontrolintent, project, compositeapp, compositeappversion)
+	if err != nil {
+		return WorkloadIntent{}, pkgerrors.Errorf("Network Control Intent %v does not exist", netcontrolintent)
+	}
+
+	//Check if this WorkloadIntent already exists
+	_, err = v.GetWorkloadIntent(wi.Metadata.Name, project, compositeapp, compositeappversion, netcontrolintent)
+	if err == nil && !exists {
+		return WorkloadIntent{}, pkgerrors.New("WorkloadIntent already exists")
+	}
+
+	err = db.DBconn.Insert(v.db.storeName, key, nil, v.db.tagMeta, wi)
+	if err != nil {
+		return WorkloadIntent{}, pkgerrors.Wrap(err, "Creating DB Entry")
+	}
+
+	return wi, nil
+}
+
+// GetWorkloadIntent returns the WorkloadIntent for corresponding name
+func (v *WorkloadIntentClient) GetWorkloadIntent(name, project, compositeapp, compositeappversion, netcontrolintent string) (WorkloadIntent, error) {
+
+	//Construct key and tag to select the entry
+	key := WorkloadIntentKey{
+		Project:             project,
+		CompositeApp:        compositeapp,
+		CompositeAppVersion: compositeappversion,
+		NetControlIntent:    netcontrolintent,
+		WorkloadIntent:      name,
+	}
+
+	value, err := db.DBconn.Find(v.db.storeName, key, v.db.tagMeta)
+	if err != nil {
+		return WorkloadIntent{}, pkgerrors.Wrap(err, "Get WorkloadIntent")
+	}
+
+	//value is a byte array
+	if value != nil {
+		wi := WorkloadIntent{}
+		err = db.DBconn.Unmarshal(value[0], &wi)
+		if err != nil {
+			return WorkloadIntent{}, pkgerrors.Wrap(err, "Unmarshalling Value")
+		}
+		return wi, nil
+	}
+
+	return WorkloadIntent{}, pkgerrors.New("Error getting WorkloadIntent")
+}
+
+// GetWorkloadIntentList returns all of the WorkloadIntent for corresponding name
+func (v *WorkloadIntentClient) GetWorkloadIntents(project, compositeapp, compositeappversion, netcontrolintent string) ([]WorkloadIntent, error) {
+
+	//Construct key and tag to select the entry
+	key := WorkloadIntentKey{
+		Project:             project,
+		CompositeApp:        compositeapp,
+		CompositeAppVersion: compositeappversion,
+		NetControlIntent:    netcontrolintent,
+		WorkloadIntent:      "",
+	}
+
+	var resp []WorkloadIntent
+	values, err := db.DBconn.Find(v.db.storeName, key, v.db.tagMeta)
+	if err != nil {
+		return []WorkloadIntent{}, pkgerrors.Wrap(err, "Get WorkloadIntents")
+	}
+
+	for _, value := range values {
+		wi := WorkloadIntent{}
+		err = db.DBconn.Unmarshal(value, &wi)
+		if err != nil {
+			return []WorkloadIntent{}, pkgerrors.Wrap(err, "Unmarshalling Value")
+		}
+		resp = append(resp, wi)
+	}
+
+	return resp, nil
+}
+
+// Delete the  WorkloadIntent from database
+func (v *WorkloadIntentClient) DeleteWorkloadIntent(name, project, compositeapp, compositeappversion, netcontrolintent string) error {
+
+	//Construct key and tag to select the entry
+	key := WorkloadIntentKey{
+		Project:             project,
+		CompositeApp:        compositeapp,
+		CompositeAppVersion: compositeappversion,
+		NetControlIntent:    netcontrolintent,
+		WorkloadIntent:      name,
+	}
+
+	err := db.DBconn.Remove(v.db.storeName, key)
+	if err != nil {
+		return pkgerrors.Wrap(err, "Delete WorkloadIntent Entry;")
+	}
+
+	return nil
+}