Add Composite Application API

Implemented Composite application API and added create,
get and delete handlers for the composite applications.

Formatted Project related .go files

Issue-ID: MULTICLOUD-994
Signed-off-by: Srivahni Chivukula <srivahni.chivukula@intel.com>
Change-Id: I7cef1a2c75f8cb39f397dcbb3f5d7bb2a57b4a72

1 files changed, 158 insertions, 0 deletions

diff --git a/src/orchestrator/pkg/module/compositeapp.go b/src/orchestrator/pkg/module/compositeapp.go
new file mode 100644
index 00000000..0a4e158c
--- /dev/null
+++ b/src/orchestrator/pkg/module/compositeapp.go
@@ -0,0 +1,158 @@
+/*
+ * 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 governinog permissions and
+ * limitations under the License.
+ */
+
+package module
+
+import (
+	"encoding/json"
+
+	"github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/db"
+
+	pkgerrors "github.com/pkg/errors"
+)
+
+// CompositeApp contains metadata and spec for CompositeApps
+type CompositeApp struct {
+	Metadata CompositeAppMetaData `json:"metadata"`
+	Spec     CompositeAppSpec     `json:"spec"`
+}
+
+//CompositeAppMetaData contains the parameters needed for CompositeApps
+type CompositeAppMetaData struct {
+	Name        string `json:"name"`
+	Description string `json:"description"`
+	UserData1   string `userData1:"userData1"`
+	UserData2   string `userData2:"userData2"`
+}
+
+//CompositeAppSpec contains the Version of the CompositeApp
+type CompositeAppSpec struct {
+	Version string `json:"version"`
+}
+
+// CompositeAppKey is the key structure that is used in the database
+type CompositeAppKey struct {
+	CompositeAppName string `json:"compositeappname"`
+	Version          string `json:"version"`
+	Project          string `json:"project"`
+}
+
+// We will use json marshalling to convert to string to
+// preserve the underlying structure.
+func (cK CompositeAppKey) String() string {
+	out, err := json.Marshal(cK)
+	if err != nil {
+		return ""
+	}
+	return string(out)
+}
+
+// CompositeAppManager is an interface exposes the CompositeApp functionality
+type CompositeAppManager interface {
+	CreateCompositeApp(c CompositeApp, p string) (CompositeApp, error)
+	GetCompositeApp(name string, version string, p string) (CompositeApp, error)
+	DeleteCompositeApp(name string, version string, p string) error
+}
+
+// CompositeAppClient implements the CompositeAppManager
+// It will also be used to maintain some localized state
+type CompositeAppClient struct {
+	storeName           string
+	tagMeta, tagContent string
+}
+
+// NewCompositeAppClient returns an instance of the CompositeAppClient
+// which implements the CompositeAppManager
+func NewCompositeAppClient() *CompositeAppClient {
+	return &CompositeAppClient{
+		storeName: "orchestrator",
+		tagMeta:   "compositeAppmetadata",
+	}
+}
+
+// CreateCompositeApp creates a new collection based on the CompositeApp
+func (v *CompositeAppClient) CreateCompositeApp(c CompositeApp, p string) (CompositeApp, error) {
+
+	//Construct the composite key to select the entry
+	key := CompositeAppKey{
+		CompositeAppName: c.Metadata.Name,
+		Version:          c.Spec.Version,
+		Project:          p,
+	}
+
+	//Check if this CompositeApp already exists
+	_, err := v.GetCompositeApp(c.Metadata.Name, c.Spec.Version, p)
+	if err == nil {
+		return CompositeApp{}, pkgerrors.New("CompositeApp already exists")
+	}
+
+	//Check if Project exists
+	_, err = NewProjectClient().GetProject(p)
+	if err != nil {
+		return CompositeApp{}, pkgerrors.New("Unable to find the project")
+	}
+
+	err = db.DBconn.Create(v.storeName, key, v.tagMeta, c)
+	if err != nil {
+		return CompositeApp{}, pkgerrors.Wrap(err, "Creating DB Entry")
+	}
+
+	return c, nil
+}
+
+// GetCompositeApp returns the CompositeApp for corresponding name
+func (v *CompositeAppClient) GetCompositeApp(name string, version string, p string) (CompositeApp, error) {
+
+	//Construct the composite key to select the entry
+	key := CompositeAppKey{
+		CompositeAppName: name,
+		Version:          version,
+		Project:          p,
+	}
+	value, err := db.DBconn.Read(v.storeName, key, v.tagMeta)
+	if err != nil {
+		return CompositeApp{}, pkgerrors.Wrap(err, "Get composite application")
+	}
+
+	//value is a byte array
+	if value != nil {
+		compApp := CompositeApp{}
+		err = db.DBconn.Unmarshal(value, &compApp)
+		if err != nil {
+			return CompositeApp{}, pkgerrors.Wrap(err, "Unmarshaling Value")
+		}
+		return compApp, nil
+	}
+
+	return CompositeApp{}, pkgerrors.New("Error getting composite application")
+}
+
+// DeleteCompositeApp deletes the  CompositeApp from database
+func (v *CompositeAppClient) DeleteCompositeApp(name string, version string, p string) error {
+
+	//Construct the composite key to select the entry
+	key := CompositeAppKey{
+		CompositeAppName: name,
+		Version:          version,
+		Project:          p,
+	}
+	err := db.DBconn.Delete(v.storeName, key, v.tagMeta)
+	if err != nil {
+		return pkgerrors.Wrap(err, "Delete CompositeApp Entry;")
+	}
+
+	return nil
+}