E2Manager/handlers/x2_reset_request_handler.go

   1 //
   2 // Copyright 2019 AT&T Intellectual Property
   3 // Copyright 2019 Nokia
   4 //
   5 // Licensed under the Apache License, Version 2.0 (the "License");
   6 // you may not use this file except in compliance with the License.
   7 // You may obtain a copy of the License at
   8 //
   9 //      http://www.apache.org/licenses/LICENSE-2.0
  10 //
  11 // Unless required by applicable law or agreed to in writing, software
  12 // distributed under the License is distributed on an "AS IS" BASIS,
  13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 // See the License for the specific language governing permissions and
  15 // limitations under the License.
  16 //
  17
  18 package handlers
  19 import (
  20         "e2mgr/configuration"
  21         "e2mgr/e2managererrors"
  22         "e2mgr/e2pdus"
  23         "e2mgr/logger"
  24         "e2mgr/models"
  25         "e2mgr/rNibWriter"
  26         "e2mgr/rmrCgo"
  27         "e2mgr/services"
  28         "e2mgr/sessions"
  29         "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/common"
  30         "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
  31         "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/reader"
  32 )
  33
  34 type X2ResetRequestHandler struct {
  35         readerProvider func() reader.RNibReader
  36         writerProvider func() rNibWriter.RNibWriter
  37         rmrService *services.RmrService
  38         config         *configuration.Configuration
  39 }
  40
  41
  42 func NewX2ResetRequestHandler(rmrService *services.RmrService, config *configuration.Configuration, writerProvider func() rNibWriter.RNibWriter,
  43         readerProvider func() reader.RNibReader) *X2ResetRequestHandler {
  44         return &X2ResetRequestHandler{
  45                 readerProvider: readerProvider,
  46                 writerProvider: writerProvider,
  47                 rmrService: rmrService,
  48                 config:         config,
  49         }
  50 }
  51
  52 func (handler *X2ResetRequestHandler) Handle(logger *logger.Logger, request models.Request) error {
  53         resetRequest := request.(models.ResetRequest)
  54
  55         if len(resetRequest.Cause) == 0 {
  56                 resetRequest.Cause = e2pdus.OmInterventionCause
  57         }
  58         payload, ok:= e2pdus.KnownCausesToX2ResetPDU(resetRequest.Cause)
  59         if !ok {
  60                 logger.Errorf("#reset_request_handler.Handle - Unknown cause (%s)", resetRequest.Cause)
  61                 return e2managererrors.NewRequestValidationError()
  62         }
  63
  64         nodeb, err  := handler.readerProvider().GetNodeb(resetRequest.RanName)
  65         if err != nil {
  66                 logger.Errorf("#reset_request_handler.Handle - failed to get status of RAN: %s from RNIB. Error: %s", resetRequest.RanName,  err.Error())
  67                 if err.GetCode() == common.RESOURCE_NOT_FOUND {
  68                         return e2managererrors.NewResourceNotFoundError()
  69                 }
  70                 return e2managererrors.NewRnibDbError()
  71         }
  72
  73         if nodeb.ConnectionStatus != entities.ConnectionStatus_CONNECTED {
  74                 logger.Errorf("#reset_request_handler.Handle - RAN: %s in wrong state (%s)", resetRequest.RanName, entities.ConnectionStatus_name[int32(nodeb.ConnectionStatus)])
  75                 return e2managererrors.NewWrongStateError(entities.ConnectionStatus_name[int32(nodeb.ConnectionStatus)])
  76         }
  77
  78         transactionId := resetRequest.RanName
  79         handler.rmrService.E2sessions[transactionId] = sessions.E2SessionDetails{SessionStart: resetRequest.StartTime, Request: &models.RequestDetails{RanName: resetRequest.RanName}}
  80         response := models.NotificationResponse{MgsType: rmrCgo.RIC_X2_RESET, RanName: resetRequest.RanName, Payload: payload}
  81         if err:= handler.rmrService.SendRmrMessage(&response); err != nil {
  82                 logger.Errorf("#reset_request_handler.Handle - failed to send reset message to RMR: %s", err)
  83                 delete(handler.rmrService.E2sessions, transactionId)
  84                 return  e2managererrors.NewRmrError()
  85         }
  86
  87         logger.Infof("#reset_request_handler.Handle - sent x2 reset to RAN: %s with cause: %s", resetRequest.RanName, resetRequest.Cause)
  88         return nil
  89 }
  90
  91