1 files changed, 106 insertions, 0 deletions
diff --git a/src/orchestrator/internal/db/store.go b/src/orchestrator/internal/db/store.go
new file mode 100644
index 00000000..ed394205
--- /dev/null
+++ b/src/orchestrator/internal/db/store.go
@@ -0,0 +1,106 @@
+/*
+Copyright 2018 Intel Corporation.
+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 db
+
+import (
+	"encoding/json"
+	"reflect"
+
+	"github.com/onap/multicloud-k8s/src/orchestrator/internal/config"
+
+	pkgerrors "github.com/pkg/errors"
+)
+
+// DBconn interface used to talk a concrete Database connection
+var DBconn Store
+
+// Key is an interface that will be implemented by anypackage
+// that wants to use the Store interface. This allows various
+// db backends and key types.
+type Key interface {
+	String() string
+}
+
+// Store is an interface for accessing the database
+type Store interface {
+	// Returns nil if db health is good
+	HealthCheck() error
+
+	// Unmarshal implements any unmarshaling needed for the database
+	Unmarshal(inp []byte, out interface{}) error
+
+	// Creates a new master document with key and links data with tag and
+	// creates a pointer(row) to the newly added data in the master table
+	Create(table string, key Key, tag string, data interface{}) error
+
+	// Reads data for a particular key with specific tag.
+	Read(table string, key Key, tag string) ([]byte, error)
+
+	// Update data for particular key with specific tag
+	Update(table string, key Key, tag string, data interface{}) error
+
+	// Deletes a specific tag data for key.
+	// TODO: If tag is empty, it will delete all tags under key.
+	Delete(table string, key Key, tag string) error
+
+	// Reads all master tables and data from the specified tag in table
+	ReadAll(table string, tag string) (map[string][]byte, error)
+}
+
+// CreateDBClient creates the DB client
+func createDBClient(dbType string) error {
+	var err error
+	switch dbType {
+	case "mongo":
+		// create a mongodb database with orchestrator as the name
+		DBconn, err = NewMongoStore("orchestrator", nil)
+	default:
+		return pkgerrors.New(dbType + "DB not supported")
+	}
+	return err
+}
+
+// Serialize converts given data into a JSON string
+func Serialize(v interface{}) (string, error) {
+	out, err := json.Marshal(v)
+	if err != nil {
+		return "", pkgerrors.Wrap(err, "Error serializing "+reflect.TypeOf(v).String())
+	}
+	return string(out), nil
+}
+
+// DeSerialize converts string to a json object specified by type
+func DeSerialize(str string, v interface{}) error {
+	err := json.Unmarshal([]byte(str), &v)
+	if err != nil {
+		return pkgerrors.Wrap(err, "Error deSerializing "+str)
+	}
+	return nil
+}
+
+// InitializeDatabaseConnection sets up the connection to the
+// configured database to allow the application to talk to it.
+func InitializeDatabaseConnection() error {
+	err := createDBClient(config.GetConfiguration().DatabaseType)
+	if err != nil {
+		return pkgerrors.Cause(err)
+	}
+
+	err = DBconn.HealthCheck()
+	if err != nil {
+		return pkgerrors.Cause(err)
+	}
+
+	return nil
+}