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Get Nodeb Design

Get Nodeb Design

Feb 25, 2020

1. Controller Layer

  • Add Route:

    GET("/v1/nodeb/:ranName", controller.GetNodeb)

  • Change name of requestController to nodebController:

controller := controllers.NewNodebController(logger, rmrService)

  • New Controller method:

    func (rc RequestController) GetNodeb (writer http.ResponseWriter, request *http.Request, params httprouter.Params)

  • GetNb Business Logic

Code

Comment

ranName := params.ByName("ranName")

 

respondingNode, err := GetRnibReader().GetNodeb(ranName)

 

if err {
      writer.WriteHeader(http.StatusNotFound)
      return

}

OR writer.WriteHeader(http. StatusInternalServerError) , depends whether we haven’t found this key or we’re having issues with DB/Server

m := jsonpb.Marshaler{}

 

result, err := m.MarshalToString(respondingNode)

Convert the unmarshalled proto to JSON. Handle error

w.Header().Set("Content-Type", "application/json")

 

w.Write(result)

Respond with 200OK and responding node JSON representation.
(Concern: JSON size limitation of Go in case of maximal number of entities).

2. Entities

message RespondingNode{

    ConnectionStatus connectionStatus = 1;

    string ip = 2;

    uint32 port = 3;

    Node.Type nodeType = 4;

    oneof Nodes{

        ENB enb = 5;

        GNB gnb = 6;

    }

}

 

enum ConnectionStatus{

    UNKNOWN_ConnectionStatus = 0;

    Connected = 1;

    NotConnected =2;

}

 

message Node{

    enum Type {

        UNKNOWN = 0;

        ENB = 1;

        GNB = 2;

    }

}

3. RnibReader

  • New package: rnibReade

RnibReader interface {

            GetNb(key string) (*RespondingNode, error)

}

 

// Get may also create an instance
func GetRnibReader() RnibReader {

         return pool.Get().(RnibReader)

} 

  • Init RNIB instances pool (concern: separate the pool from rnibWriter layer)

  • GetNodeb Business Logic

Code

Comment

Code

Comment

keyToCheck := "RAN:"+ranName

 

defer pool.Put(rnibInstance)

 

m, err := rnibInstance.sdl.Get([]string{ keyToCheck })     

USE SDL to fetch data from REDIS. RETURNS: (map[string]interface{}, error)

data, ok := m[keyToCheck]

Get the value of the requested key. This will be a byte array

pb := &RespondingNode{}

Create a new pointer to the responding node

proto.Unmarshal(data, pb)

Unmarshal parses the protocol buffer representation in buf and places the decoded result in pb

return pb

 

 

4. Sequence Diagram