Copy latest code to master

[ric-plt/resource-status-manager.git] / RSM / rsmdb / rsm_reader.go

diff --git a/RSM/rsmdb/rsm_reader.go b/RSM/rsmdb/rsm_reader.go
new file mode 100644 (file)
index 0000000..852346b
--- /dev/null
+++ b/RSM/rsmdb/rsm_reader.go
@@ -0,0 +1,85 @@
+//
+// Copyright 2019 AT&T Intellectual Property
+// Copyright 2019 Nokia
+//
+// 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 rsmdb
+
+import (
+       "encoding/json"
+       "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/common"
+       "reflect"
+       "rsm/models"
+)
+
+type rsmReaderInstance struct {
+       sdl common.ISdlInstance
+}
+
+// RsmReader interface allows retrieving data from redis BD by various keys
+type RsmReader interface {
+       GetRsmGeneralConfiguration() (*models.RsmGeneralConfiguration, error)
+       GetRsmRanInfo(ranName string) (*models.RsmRanInfo, error)
+}
+
+// GetRsmReader returns reference to RsmReader
+func GetRsmReader(sdl common.ISdlInstance) RsmReader {
+       return &rsmReaderInstance{sdl: sdl}
+}
+
+// GetRsmRanInfo returns the rsm data associated with ran 'ranName'
+func (r *rsmReaderInstance) GetRsmRanInfo(ranName string) (*models.RsmRanInfo, error) {
+
+       key, err := common.ValidateAndBuildNodeBNameKey(ranName)
+       if err != nil {
+               return nil, err
+       }
+
+       rsmRanInfo := &models.RsmRanInfo{}
+
+       err = r.getByKeyAndUnmarshal(key, rsmRanInfo)
+
+       if err != nil {
+               return nil, err
+       }
+
+       return rsmRanInfo, nil
+}
+
+// GetRsmGeneralConfiguration returns resource status request related configuration
+func (r *rsmReaderInstance) GetRsmGeneralConfiguration() (*models.RsmGeneralConfiguration, error) {
+       cfg := &models.RsmGeneralConfiguration{}
+       err := r.getByKeyAndUnmarshal(buildRsmGeneralConfigurationKey(), cfg)
+       return cfg, err
+}
+
+// getByKeyAndUnmarshal returns the value that is associated with key 'key' as a Go structure
+func (r *rsmReaderInstance) getByKeyAndUnmarshal(key string, entity interface{}) error {
+       data, err := r.sdl.Get([]string{key})
+       if err != nil {
+               return common.NewInternalError(err)
+       }
+       if data != nil && data[key] != nil {
+               err = json.Unmarshal([]byte(data[key].(string)), entity)
+               if err != nil {
+                       return common.NewInternalError(err)
+               }
+               return nil
+       }
+       return common.NewResourceNotFoundErrorf("#rsmReader.getByKeyAndUnmarshal - entity of type %s not found. Key: %s", reflect.TypeOf(entity).String(), key)
+}
+
+func buildRsmGeneralConfigurationKey() string {
+       return "CFG:GENERAL:v1.0.0"
+}