dmaap-mediator-producer/main.go

   1 // -
   2 //   ========================LICENSE_START=================================
   3 //   O-RAN-SC
   4 //   %%
   5 //   Copyright (C) 2021: Nordix Foundation
   6 //   %%
   7 //   Licensed under the Apache License, Version 2.0 (the "License");
   8 //   you may not use this file except in compliance with the License.
   9 //   You may obtain a copy of the License at
  10 //
  11 //        http://www.apache.org/licenses/LICENSE-2.0
  12 //
  13 //   Unless required by applicable law or agreed to in writing, software
  14 //   distributed under the License is distributed on an "AS IS" BASIS,
  15 //   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16 //   See the License for the specific language governing permissions and
  17 //   limitations under the License.
  18 //   ========================LICENSE_END===================================
  19 //
  20
  21 package main
  22
  23 import (
  24         "fmt"
  25         "net/http"
  26         "sync"
  27         "time"
  28
  29         log "github.com/sirupsen/logrus"
  30         "oransc.org/nonrtric/dmaapmediatorproducer/internal/config"
  31         "oransc.org/nonrtric/dmaapmediatorproducer/internal/jobs"
  32         "oransc.org/nonrtric/dmaapmediatorproducer/internal/restclient"
  33         "oransc.org/nonrtric/dmaapmediatorproducer/internal/server"
  34 )
  35
  36 const timeoutHTTPClient = time.Second * 5
  37 const timeoutPollClient = time.Second * 15
  38
  39 var configuration *config.Config
  40 var httpClient restclient.HTTPClient
  41 var jobHandler *jobs.JobHandlerImpl
  42
  43 func init() {
  44         configuration = config.New()
  45 }
  46
  47 func main() {
  48         log.SetLevel(configuration.LogLevel)
  49         log.Debug("Initializing DMaaP Mediator Producer")
  50         if err := validateConfiguration(configuration); err != nil {
  51                 log.Fatalf("Stopping producer due to error: %v", err)
  52         }
  53         callbackAddress := fmt.Sprintf("%v:%v", configuration.InfoProducerHost, configuration.InfoProducerPort)
  54
  55         httpClient = &http.Client{
  56                 Timeout: timeoutHTTPClient,
  57         }
  58         pollClient := &http.Client{
  59                 Timeout: timeoutPollClient,
  60         }
  61         jobHandler = jobs.NewJobHandlerImpl("configs/type_config.json", pollClient, httpClient)
  62         if err := registerTypesAndProducer(jobHandler, configuration.InfoCoordinatorAddress, callbackAddress); err != nil {
  63                 log.Fatalf("Stopping producer due to: %v", err)
  64         }
  65
  66         log.Debug("Starting DMaaP Mediator Producer")
  67         wg := new(sync.WaitGroup)
  68
  69         // add two goroutines to `wg` WaitGroup, one for each running go routine
  70         wg.Add(2)
  71
  72         log.Debugf("Starting callback server at port %v", configuration.InfoProducerPort)
  73         go func() {
  74                 r := server.NewRouter(jobHandler)
  75                 log.Warn(http.ListenAndServe(fmt.Sprintf(":%v", configuration.InfoProducerPort), r))
  76                 wg.Done()
  77         }()
  78
  79         go func() {
  80                 jobHandler.RunJobs(fmt.Sprintf("%v:%v", configuration.MRHost, configuration.MRPort))
  81                 wg.Done()
  82         }()
  83
  84         // wait until WaitGroup is done
  85         wg.Wait()
  86         log.Debug("Stopping DMaaP Mediator Producer")
  87 }
  88
  89 func validateConfiguration(configuration *config.Config) error {
  90         if configuration.InfoProducerHost == "" {
  91                 return fmt.Errorf("missing INFO_PRODUCER_HOST")
  92         }
  93         return nil
  94 }
  95
  96 func registerTypesAndProducer(jobHandler jobs.JobTypeHandler, infoCoordinatorAddress string, callbackAddress string) error {
  97         registrator := config.NewRegistratorImpl(infoCoordinatorAddress, httpClient)
  98         if types, err := jobHandler.GetTypes(); err == nil {
  99                 if regErr := registrator.RegisterTypes(types); regErr != nil {
 100                         return fmt.Errorf("unable to register all types due to: %v", regErr)
 101                 }
 102         } else {
 103                 return fmt.Errorf("unable to get types to register due to: %v", err)
 104         }
 105         producer := config.ProducerRegistrationInfo{
 106                 InfoProducerSupervisionCallbackUrl: callbackAddress + server.StatusPath,
 107                 SupportedInfoTypes:                 jobHandler.GetSupportedTypes(),
 108                 InfoJobCallbackUrl:                 callbackAddress + server.AddJobPath,
 109         }
 110         if err := registrator.RegisterProducer("DMaaP_Mediator_Producer", &producer); err != nil {
 111                 return fmt.Errorf("unable to register producer due to: %v", err)
 112         }
 113         return nil
 114 }