Add support for composite keys

Composite keys help us store objects which are unique
for a given set of pre-existing objects.
Eg: Many profiles can exist for a definition and its
key will have a definition name as a part of the composite key.
P2: Use a predefined interface for keys instead of generic interfaceP{}
P3: Add check for empty strings in stringer interface
P5: Add appropriate keys in other packages.

Issue-ID: MULTICLOUD-531
Change-Id: I314b1fbd718489ae8a45f0f38915c08ca32f9f43
Signed-off-by: Kiran Kamineni <kiran.k.kamineni@intel.com>

1 files changed, 17 insertions, 10 deletions

diff --git a/src/k8splugin/internal/db/mongo.go b/src/k8splugin/internal/db/mongo.go
index d414f543..8c422380 100644
--- a/src/k8splugin/internal/db/mongo.go
+++ b/src/k8splugin/internal/db/mongo.go
@@ -108,10 +108,17 @@ func (m *MongoStore) HealthCheck() error {
 }
 
 // validateParams checks to see if any parameters are empty
-func (m *MongoStore) validateParams(args ...string) bool {
+func (m *MongoStore) validateParams(args ...interface{}) bool {
 	for _, v := range args {
-		if v == "" {
-			return false
+		val, ok := v.(string)
+		if ok {
+			if val == "" {
+				return false
+			}
+		} else {
+			if v == nil {
+				return false
+			}
 		}
 	}
 
@@ -119,7 +126,7 @@ func (m *MongoStore) validateParams(args ...string) bool {
 }
 
 // Create is used to create a DB entry
-func (m *MongoStore) Create(coll, key, tag string, data interface{}) error {
+func (m *MongoStore) Create(coll string, key Key, tag string, data interface{}) error {
 	if data == nil || !m.validateParams(coll, key, tag) {
 		return pkgerrors.New("No Data to store")
 	}
@@ -168,7 +175,7 @@ func (m *MongoStore) Unmarshal(inp []byte, out interface{}) error {
 }
 
 // Read method returns the data stored for this key and for this particular tag
-func (m *MongoStore) Read(coll, key, tag string) ([]byte, error) {
+func (m *MongoStore) Read(coll string, key Key, tag string) ([]byte, error) {
 	if !m.validateParams(coll, key, tag) {
 		return nil, pkgerrors.New("Mandatory fields are missing")
 	}
@@ -223,7 +230,7 @@ func (m *MongoStore) deleteObjectByID(coll string, objID primitive.ObjectID) err
 
 // Delete method removes a document from the Database that matches key
 // TODO: delete all referenced docs if tag is empty string
-func (m *MongoStore) Delete(coll, key, tag string) error {
+func (m *MongoStore) Delete(coll string, key Key, tag string) error {
 	if !m.validateParams(coll, key, tag) {
 		return pkgerrors.New("Mandatory fields are missing")
 	}
@@ -314,10 +321,10 @@ func (m *MongoStore) ReadAll(coll, tag string) (map[string][]byte, error) {
 		d := cursor.Current
 
 		//Read key of each master table
-		key, ok := d.Lookup("key").StringValueOK()
+		key, ok := d.Lookup("key").DocumentOK()
 		if !ok {
-			log.Printf("Unable to read key string from mastertable %s", err.Error())
-			continue
+			//Throw error if key is not found
+			pkgerrors.New("Unable to read key from mastertable")
 		}
 
 		//Get objectID of tag document
@@ -333,7 +340,7 @@ func (m *MongoStore) ReadAll(coll, tag string) (map[string][]byte, error) {
 			log.Printf("Unable to decode tag data %s", err.Error())
 			continue
 		}
-		result[key] = tagData.Lookup(tag).Value
+		result[key.String()] = tagData.Lookup(tag).Value
 	}
 
 	if len(result) == 0 {