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         "github.com/hashicorp/go-retryablehttp"
  30         log "github.com/sirupsen/logrus"
  31         "oransc.org/nonrtric/dmaapmediatorproducer/internal/config"
  32         "oransc.org/nonrtric/dmaapmediatorproducer/internal/jobs"
  33         "oransc.org/nonrtric/dmaapmediatorproducer/internal/restclient"
  34         "oransc.org/nonrtric/dmaapmediatorproducer/internal/server"
  35 )
  36
  37 const timeoutDistributionClient = time.Second * 5
  38 const retryWaitMax = time.Minute
  39 const retryMax = int(^uint(0) >> 1)
  40
  41 var configuration *config.Config
  42 var retryClient restclient.HTTPClient
  43 var jobHandler *jobs.JobHandlerImpl
  44
  45 func init() {
  46         configuration = config.New()
  47 }
  48
  49 func main() {
  50         log.SetLevel(configuration.LogLevel)
  51         log.Debug("Initializing DMaaP Mediator Producer")
  52         if err := validateConfiguration(configuration); err != nil {
  53                 log.Fatalf("Stopping producer due to error: %v", err)
  54         }
  55         callbackAddress := fmt.Sprintf("%v:%v", configuration.InfoProducerHost, configuration.InfoProducerPort)
  56
  57         distributionClient := &http.Client{
  58                 Timeout: timeoutDistributionClient,
  59         }
  60
  61         rawRetryClient := retryablehttp.NewClient()
  62         rawRetryClient.RetryWaitMax = retryWaitMax
  63         rawRetryClient.RetryMax = retryMax
  64         retryClient = rawRetryClient.StandardClient()
  65
  66         jobHandler = jobs.NewJobHandlerImpl("configs/type_config.json", retryClient, distributionClient)
  67         if err := registerTypesAndProducer(jobHandler, configuration.InfoCoordinatorAddress, callbackAddress); err != nil {
  68                 log.Fatalf("Stopping producer due to: %v", err)
  69         }
  70
  71         log.Debug("Starting DMaaP Mediator Producer")
  72         wg := new(sync.WaitGroup)
  73
  74         // add two goroutines to `wg` WaitGroup, one for each running go routine
  75         wg.Add(2)
  76
  77         log.Debugf("Starting callback server at port %v", configuration.InfoProducerPort)
  78         go func() {
  79                 r := server.NewRouter(jobHandler)
  80                 log.Warn(http.ListenAndServe(fmt.Sprintf(":%v", configuration.InfoProducerPort), r))
  81                 wg.Done()
  82         }()
  83
  84         go func() {
  85                 jobHandler.RunJobs(fmt.Sprintf("%v:%v", configuration.MRHost, configuration.MRPort))
  86                 wg.Done()
  87         }()
  88
  89         // wait until WaitGroup is done
  90         wg.Wait()
  91         log.Debug("Stopping DMaaP Mediator Producer")
  92 }
  93
  94 func validateConfiguration(configuration *config.Config) error {
  95         if configuration.InfoProducerHost == "" {
  96                 return fmt.Errorf("missing INFO_PRODUCER_HOST")
  97         }
  98         return nil
  99 }
 100
 101 func registerTypesAndProducer(jobHandler jobs.JobTypeHandler, infoCoordinatorAddress string, callbackAddress string) error {
 102         registrator := config.NewRegistratorImpl(infoCoordinatorAddress, retryClient)
 103         if types, err := jobHandler.GetTypes(); err == nil {
 104                 if regErr := registrator.RegisterTypes(types); regErr != nil {
 105                         return fmt.Errorf("unable to register all types due to: %v", regErr)
 106                 }
 107         } else {
 108                 return fmt.Errorf("unable to get types to register due to: %v", err)
 109         }
 110         producer := config.ProducerRegistrationInfo{
 111                 InfoProducerSupervisionCallbackUrl: callbackAddress + server.StatusPath,
 112                 SupportedInfoTypes:                 jobHandler.GetSupportedTypes(),
 113                 InfoJobCallbackUrl:                 callbackAddress + server.AddJobPath,
 114         }
 115         if err := registrator.RegisterProducer("DMaaP_Mediator_Producer", &producer); err != nil {
 116                 return fmt.Errorf("unable to register producer due to: %v", err)
 117         }
 118         return nil
 119 }