E2Manager/managers/e2t_keep_alive_worker.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 //  This source code is part of the near-RT RIC (RAN Intelligent Controller)
  19 //  platform project (RICP).
  20
  21 package managers
  22
  23 import (
  24         "e2mgr/configuration"
  25         "e2mgr/logger"
  26         "e2mgr/models"
  27         "e2mgr/rmrCgo"
  28         "e2mgr/services/rmrsender"
  29         "time"
  30 )
  31
  32 type E2TKeepAliveWorker struct {
  33         logger              *logger.Logger
  34         e2tShutdownManager  IE2TShutdownManager
  35         e2TInstancesManager IE2TInstancesManager
  36         rmrSender           *rmrsender.RmrSender
  37         config              *configuration.Configuration
  38 }
  39
  40 func NewE2TKeepAliveWorker(logger *logger.Logger, rmrSender *rmrsender.RmrSender, e2TInstancesManager IE2TInstancesManager, e2tShutdownManager IE2TShutdownManager, config *configuration.Configuration) E2TKeepAliveWorker {
  41         return E2TKeepAliveWorker{
  42                 logger:              logger,
  43                 e2tShutdownManager:  e2tShutdownManager,
  44                 e2TInstancesManager: e2TInstancesManager,
  45                 rmrSender:           rmrSender,
  46                 config:              config,
  47         }
  48 }
  49
  50 func (h E2TKeepAliveWorker) Execute() {
  51
  52         h.logger.Infof("#E2TKeepAliveWorker.Execute - keep alive started")
  53
  54         ticker := time.NewTicker(time.Duration(h.config.KeepAliveDelayMs) * time.Millisecond)
  55
  56         for _ = range ticker.C {
  57
  58                 h.SendKeepAliveRequest()
  59                 h.E2TKeepAliveExpired()
  60         }
  61 }
  62
  63 func (h E2TKeepAliveWorker) E2TKeepAliveExpired() {
  64
  65         e2tInstances, err := h.e2TInstancesManager.GetE2TInstancesNoLogs()
  66
  67         if err != nil || len(e2tInstances) == 0 {
  68                 return
  69         }
  70
  71         for _, e2tInstance := range e2tInstances {
  72
  73                 delta := int64(time.Now().UnixNano()) - e2tInstance.KeepAliveTimestamp
  74                 timestampNanosec := int64(time.Duration(h.config.KeepAliveResponseTimeoutMs) * time.Millisecond)
  75
  76                 if delta > timestampNanosec {
  77
  78                         h.logger.Warnf("#E2TKeepAliveWorker.E2TKeepAliveExpired - e2t address: %s time expired, shutdown e2 instance", e2tInstance.Address)
  79
  80                         h.e2tShutdownManager.Shutdown(e2tInstance)
  81                 }
  82         }
  83 }
  84
  85 func (h E2TKeepAliveWorker) SendKeepAliveRequest() {
  86
  87         rmrMessage := models.RmrMessage{MsgType: rmrCgo.E2_TERM_KEEP_ALIVE_REQ}
  88         h.rmrSender.SendWithoutLogs(&rmrMessage)
  89 }