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         "crypto/tls"
  25         "fmt"
  26         "net/http"
  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 var configuration *config.Config
  37 var registered bool
  38
  39 func init() {
  40         configuration = config.New()
  41 }
  42
  43 func main() {
  44         log.SetLevel(configuration.LogLevel)
  45         log.Debug("Initializing DMaaP Mediator Producer")
  46         log.Debug("Using configuration: ", configuration)
  47         if err := validateConfiguration(configuration); err != nil {
  48                 log.Fatalf("Stopping producer due to error: %v", err)
  49         }
  50         callbackAddress := fmt.Sprintf("%v:%v", configuration.InfoProducerHost, configuration.InfoProducerPort)
  51
  52         var cert tls.Certificate
  53         if c, err := restclient.CreateClientCertificate(configuration.ProducerCertPath, configuration.ProducerKeyPath); err == nil {
  54                 cert = c
  55         } else {
  56                 log.Fatalf("Stopping producer due to error: %v", err)
  57         }
  58         retryClient := restclient.CreateRetryClient(cert)
  59
  60         jobsManager := jobs.NewJobsManagerImpl(retryClient, configuration.DMaaPMRAddress, restclient.CreateClientWithoutRetry(cert, 10*time.Second))
  61         go startCallbackServer(jobsManager, callbackAddress)
  62
  63         if err := registerTypesAndProducer(jobsManager, configuration.InfoCoordinatorAddress, callbackAddress, retryClient); err != nil {
  64                 log.Fatalf("Stopping producer due to: %v", err)
  65         }
  66         registered = true
  67         jobsManager.StartJobsForAllTypes()
  68
  69         log.Debug("Starting DMaaP Mediator Producer")
  70
  71         keepProducerAlive()
  72 }
  73
  74 func validateConfiguration(configuration *config.Config) error {
  75         if configuration.InfoProducerHost == "" {
  76                 return fmt.Errorf("missing INFO_PRODUCER_HOST")
  77         }
  78         if configuration.ProducerCertPath == "" || configuration.ProducerKeyPath == "" {
  79                 return fmt.Errorf("missing PRODUCER_CERT and/or PRODUCER_KEY")
  80         }
  81         return nil
  82 }
  83 func registerTypesAndProducer(jobTypesHandler jobs.JobTypesManager, infoCoordinatorAddress string, callbackAddress string, client restclient.HTTPClient) error {
  84         registrator := config.NewRegistratorImpl(infoCoordinatorAddress, client)
  85         configTypes, err := config.GetJobTypesFromConfiguration("configs/type_config.json")
  86         if err != nil {
  87                 return fmt.Errorf("unable to register all types due to: %v", err)
  88         }
  89         regErr := registrator.RegisterTypes(jobTypesHandler.LoadTypesFromConfiguration(configTypes))
  90         if regErr != nil {
  91                 return fmt.Errorf("unable to register all types due to: %v", regErr)
  92         }
  93
  94         producer := config.ProducerRegistrationInfo{
  95                 InfoProducerSupervisionCallbackUrl: callbackAddress + server.HealthCheckPath,
  96                 SupportedInfoTypes:                 jobTypesHandler.GetSupportedTypes(),
  97                 InfoJobCallbackUrl:                 callbackAddress + server.AddJobPath,
  98         }
  99         if err := registrator.RegisterProducer("DMaaP_Mediator_Producer", &producer); err != nil {
 100                 return fmt.Errorf("unable to register producer due to: %v", err)
 101         }
 102         return nil
 103 }
 104
 105 func startCallbackServer(jobsManager jobs.JobsManager, callbackAddress string) {
 106         log.Debugf("Starting callback server at port %v", configuration.InfoProducerPort)
 107         r := server.NewRouter(jobsManager, statusHandler)
 108         if restclient.IsUrlSecure(callbackAddress) {
 109                 log.Fatalf("Server stopped: %v", http.ListenAndServeTLS(fmt.Sprintf(":%v", configuration.InfoProducerPort), configuration.ProducerCertPath, configuration.ProducerKeyPath, r))
 110         } else {
 111                 log.Fatalf("Server stopped: %v", http.ListenAndServe(fmt.Sprintf(":%v", configuration.InfoProducerPort), r))
 112         }
 113 }
 114
 115 func statusHandler(w http.ResponseWriter, r *http.Request) {
 116         registeredStatus := "not registered"
 117         if registered {
 118                 registeredStatus = "registered"
 119         }
 120         fmt.Fprintf(w, `{"status": "%v"}`, registeredStatus)
 121 }
 122
 123 func keepProducerAlive() {
 124         forever := make(chan int)
 125         <-forever
 126 }