pm-file-converter/components/kafkacollector/kafkacollector.go

   1 // -
   2 //
   3 //      ========================LICENSE_START=================================
   4 //      O-RAN-SC
   5 //      %%
   6 //      Copyright (C) 2023: Nordix Foundation
   7 //      %%
   8 //      Licensed under the Apache License, Version 2.0 (the "License");
   9 //      you may not use this file except in compliance with the License.
  10 //      You may obtain a copy of the License at
  11 //
  12 //           http://www.apache.org/licenses/LICENSE-2.0
  13 //
  14 //      Unless required by applicable law or agreed to in writing, software
  15 //      distributed under the License is distributed on an "AS IS" BASIS,
  16 //      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17 //      See the License for the specific language governing permissions and
  18 //      limitations under the License.
  19 //      ========================LICENSE_END===================================
  20 package kafkacollector
  21
  22 import (
  23         "context"
  24         "fmt"
  25         "github.com/confluentinc/confluent-kafka-go/kafka"
  26         jsoniter "github.com/json-iterator/go"
  27         log "github.com/sirupsen/logrus"
  28         "golang.org/x/oauth2/clientcredentials"
  29         "main/common/dataTypes"
  30         "main/components/miniocollector"
  31         "os"
  32         "time"
  33 )
  34
  35 var creds_grant_type = os.Getenv("CREDS_GRANT_TYPE")
  36 var bootstrapserver = os.Getenv("KAFKA_SERVER")
  37 var creds_client_secret = os.Getenv("CREDS_CLIENT_SECRET")
  38 var creds_client_id = os.Getenv("CREDS_CLIENT_ID")
  39 var creds_service_url = os.Getenv("AUTH_SERVICE_URL")
  40
  41 // Limiter - valid for all jobs
  42 const parallelism_limiter = 100 //For all jobs
  43 var jobLimiterChan = make(chan struct{}, parallelism_limiter)
  44
  45 func Start_topic_reader(topic string, type_id string, control_ch chan dataTypes.ReaderControl, data_ch chan *dataTypes.KafkaPayload, gid string, cid string) {
  46
  47         log.Info("Topic reader starting, topic: ", topic, " for type: ", type_id)
  48
  49         topic_ok := false
  50         var c *kafka.Consumer = nil
  51         running := true
  52
  53         for topic_ok == false {
  54
  55                 select {
  56                 case reader_ctrl := <-control_ch:
  57                         if reader_ctrl.Command == "EXIT" {
  58                                 log.Info("Topic reader on topic: ", topic, " for type: ", type_id, " - stopped")
  59                                 data_ch <- nil //Signal to job handler
  60                                 running = false
  61                                 return
  62                         }
  63                 case <-time.After(1 * time.Second):
  64                         if !running {
  65                                 return
  66                         }
  67                         if c == nil {
  68                                 c = create_kafka_consumer(type_id, gid, cid)
  69                                 if c == nil {
  70                                         log.Info("Cannot start consumer on topic: ", topic, " for type: ", type_id, " - retrying")
  71                                 } else {
  72                                         log.Info("Consumer started on topic: ", topic, " for type: ", type_id)
  73                                 }
  74                         }
  75                         if c != nil && topic_ok == false {
  76                                 err := c.SubscribeTopics([]string{topic}, nil)
  77                                 if err != nil {
  78                                         log.Info("Topic reader cannot start subscribing on topic: ", topic, " for type: ", type_id, " - retrying --  error details: ", err)
  79                                 } else {
  80                                         log.Info("Topic reader subscribing on topic: ", topic, " for type: ", type_id)
  81                                         topic_ok = true
  82                                 }
  83                         }
  84                 }
  85         }
  86         log.Info("Topic reader ready on topic: ", topic, " for type: ", type_id)
  87
  88         var event_chan = make(chan int)
  89         go func() {
  90                 for {
  91                         select {
  92                         case evt := <-c.Events():
  93                                 switch evt.(type) {
  94                                 case kafka.OAuthBearerTokenRefresh:
  95                                         log.Debug("New consumer token needed: ", evt)
  96                                         token, err := Fetch_token()
  97                                         if err != nil {
  98                                                 log.Warning("Cannot cannot fetch token: ", err)
  99                                                 c.SetOAuthBearerTokenFailure(err.Error())
 100                                         } else {
 101                                                 setTokenError := c.SetOAuthBearerToken(*token)
 102                                                 if setTokenError != nil {
 103                                                         log.Warning("Cannot cannot set token: ", setTokenError)
 104                                                         c.SetOAuthBearerTokenFailure(setTokenError.Error())
 105                                                 }
 106                                         }
 107                                 default:
 108                                         log.Debug("Dumping topic reader event on topic: ", topic, " for type: ", type_id, " evt: ", evt.String())
 109                                 }
 110
 111                         case msg := <-event_chan:
 112                                 if msg == 0 {
 113                                         return
 114                                 }
 115                         case <-time.After(1 * time.Second):
 116                                 if !running {
 117                                         return
 118                                 }
 119                         }
 120                 }
 121         }()
 122
 123         go func() {
 124                 for {
 125                         for {
 126                                 select {
 127                                 case reader_ctrl := <-control_ch:
 128                                         if reader_ctrl.Command == "EXIT" {
 129                                                 event_chan <- 0
 130                                                 log.Debug("Topic reader on topic: ", topic, " for type: ", type_id, " - stopped")
 131                                                 data_ch <- nil //Signal to job handler
 132                                                 defer c.Close()
 133                                                 return
 134                                         }
 135                                 default:
 136
 137                                         ev := c.Poll(1000)
 138                                         if ev == nil {
 139                                                 log.Debug("Topic Reader for type: ", type_id, "  Nothing to consume on topic: ", topic)
 140                                                 continue
 141                                         }
 142                                         switch e := ev.(type) {
 143                                         case *kafka.Message:
 144                                                 var kmsg dataTypes.KafkaPayload
 145                                                 kmsg.Msg = e
 146
 147                                                 c.Commit()
 148
 149                                                 data_ch <- &kmsg
 150                                                 log.Debug("Reader msg: ", &kmsg)
 151                                                 log.Debug("Reader - data_ch ", data_ch)
 152                                         case kafka.Error:
 153                                                 fmt.Fprintf(os.Stderr, "%% Error: %v: %v\n", e.Code(), e)
 154
 155                                         case kafka.OAuthBearerTokenRefresh:
 156                                                 log.Debug("New consumer token needed: ", ev)
 157                                                 token, err := Fetch_token()
 158                                                 if err != nil {
 159                                                         log.Warning("Cannot cannot fetch token: ", err)
 160                                                         c.SetOAuthBearerTokenFailure(err.Error())
 161                                                 } else {
 162                                                         setTokenError := c.SetOAuthBearerToken(*token)
 163                                                         if setTokenError != nil {
 164                                                                 log.Warning("Cannot cannot set token: ", setTokenError)
 165                                                                 c.SetOAuthBearerTokenFailure(setTokenError.Error())
 166                                                         }
 167                                                 }
 168                                         default:
 169                                                 fmt.Printf("Ignored %v\n", e)
 170                                         }
 171                                 }
 172                         }
 173                 }
 174         }()
 175 }
 176
 177 func Start_topic_writer(control_ch chan dataTypes.WriterControl, data_ch chan *dataTypes.KafkaPayload) {
 178
 179         var kafka_producer *kafka.Producer
 180
 181         running := true
 182         log.Info("Topic writer starting")
 183
 184         // Wait for kafka producer to become available - and be prepared to exit the writer
 185         for kafka_producer == nil {
 186                 select {
 187                 case writer_ctl := <-control_ch:
 188                         if writer_ctl.Command == "EXIT" {
 189                                 //ignore cmd
 190                         }
 191                 default:
 192                         kafka_producer = start_producer()
 193                         if kafka_producer == nil {
 194                                 log.Debug("Could not start kafka producer - retrying")
 195                                 time.Sleep(1 * time.Second)
 196                         } else {
 197                                 log.Debug("Kafka producer started")
 198                         }
 199                 }
 200         }
 201
 202         var event_chan = make(chan int)
 203         go func() {
 204                 for {
 205                         select {
 206                         case evt := <-kafka_producer.Events():
 207                                 switch evt.(type) {
 208                                 case *kafka.Message:
 209                                         m := evt.(*kafka.Message)
 210
 211                                         if m.TopicPartition.Error != nil {
 212                                                 log.Debug("Dumping topic writer event, failed: ", m.TopicPartition.Error)
 213                                         } else {
 214                                                 log.Debug("Dumping topic writer event,  message to topic: ", *m.TopicPartition.Topic, " at offset: ", m.TopicPartition.Offset, " at partition: ", m.TopicPartition.Partition)
 215                                         }
 216                                 case kafka.Error:
 217                                         log.Debug("Dumping topic writer event, error: ", evt)
 218                                 case kafka.OAuthBearerTokenRefresh:
 219                                         log.Debug("New producer token needed: ", evt)
 220                                         token, err := Fetch_token()
 221                                         if err != nil {
 222                                                 log.Warning("Cannot cannot fetch token: ", err)
 223                                                 kafka_producer.SetOAuthBearerTokenFailure(err.Error())
 224                                         } else {
 225                                                 setTokenError := kafka_producer.SetOAuthBearerToken(*token)
 226                                                 if setTokenError != nil {
 227                                                         log.Warning("Cannot cannot set token: ", setTokenError)
 228                                                         kafka_producer.SetOAuthBearerTokenFailure(setTokenError.Error())
 229                                                 }
 230                                         }
 231                                 default:
 232                                         log.Debug("Dumping topic writer event, unknown: ", evt)
 233                                 }
 234
 235                         case msg := <-event_chan:
 236                                 if msg == 0 {
 237                                         return
 238                                 }
 239                         case <-time.After(1 * time.Second):
 240                                 if !running {
 241                                         return
 242                                 }
 243                         }
 244                 }
 245         }()
 246         go func() {
 247                 for {
 248                         select {
 249                         case writer_ctl := <-control_ch:
 250                                 if writer_ctl.Command == "EXIT" {
 251                                         // ignore - wait for channel signal
 252                                 }
 253
 254                         case kmsg := <-data_ch:
 255                                 if kmsg == nil {
 256                                         event_chan <- 0
 257                                         log.Info("Topic writer stopped by channel signal - start_topic_writer")
 258                                         defer kafka_producer.Close()
 259                                         return
 260                                 }
 261
 262                                 retries := 10
 263                                 msg_ok := false
 264                                 var err error
 265                                 for retry := 1; retry <= retries && msg_ok == false; retry++ {
 266                                         err = kafka_producer.Produce(&kafka.Message{
 267                                                 TopicPartition: kafka.TopicPartition{Topic: &kmsg.Topic, Partition: kafka.PartitionAny},
 268                                                 Value:          kmsg.Msg.Value, Key: kmsg.Msg.Key}, nil)
 269
 270                                         if err == nil {
 271                                                 msg_ok = true
 272                                                 log.Debug("Topic writer, msg sent ok on topic: ", kmsg.Topic)
 273                                         } else {
 274                                                 log.Info("Topic writer failed to send message on topic: ", kmsg.Topic, " - Retrying. Error details: ", err)
 275                                                 time.Sleep(time.Duration(retry) * time.Second)
 276                                         }
 277                                 }
 278                                 if !msg_ok {
 279                                         log.Error("Topic writer failed to send message on topic: ", kmsg.Topic, " - Msg discarded. Error details: ", err)
 280                                 }
 281                         case <-time.After(1000 * time.Millisecond):
 282                                 if !running {
 283                                         return
 284                                 }
 285                         }
 286                 }
 287         }()
 288 }
 289
 290 func create_kafka_consumer(type_id string, gid string, cid string) *kafka.Consumer {
 291         var cm kafka.ConfigMap
 292         if creds_grant_type == "" {
 293                 log.Info("Creating kafka plain text consumer for type: ", type_id)
 294                 cm = kafka.ConfigMap{
 295                         "bootstrap.servers":  bootstrapserver,
 296                         "group.id":           gid,
 297                         "client.id":          cid,
 298                         "auto.offset.reset":  "latest",
 299                         "enable.auto.commit": false,
 300                 }
 301         } else {
 302                 log.Info("Creating kafka SASL plain text consumer for type: ", type_id)
 303                 cm = kafka.ConfigMap{
 304                         "bootstrap.servers":  bootstrapserver,
 305                         "group.id":           gid,
 306                         "client.id":          cid,
 307                         "auto.offset.reset":  "latest",
 308                         "enable.auto.commit": false,
 309                         "sasl.mechanism":     "OAUTHBEARER",
 310                         "security.protocol":  "SASL_PLAINTEXT",
 311                 }
 312         }
 313         c, err := kafka.NewConsumer(&cm)
 314
 315         if err != nil {
 316                 log.Error("Cannot create kafka consumer for type: ", type_id, ", error details: ", err)
 317                 return nil
 318         }
 319
 320         log.Info("Created kafka consumer for type: ", type_id, " OK")
 321         return c
 322 }
 323
 324 // Start kafka producer
 325 func start_producer() *kafka.Producer {
 326         log.Info("Creating kafka producer")
 327
 328         var cm kafka.ConfigMap
 329         if creds_grant_type == "" {
 330                 log.Info("Creating kafka SASL plain text producer")
 331                 cm = kafka.ConfigMap{
 332                         "bootstrap.servers": bootstrapserver,
 333                 }
 334         } else {
 335                 log.Info("Creating kafka SASL plain text producer")
 336                 cm = kafka.ConfigMap{
 337                         "bootstrap.servers": bootstrapserver,
 338                         "sasl.mechanism":    "OAUTHBEARER",
 339                         "security.protocol": "SASL_PLAINTEXT",
 340                 }
 341         }
 342
 343         p, err := kafka.NewProducer(&cm)
 344         if err != nil {
 345                 log.Error("Cannot create kafka producer,", err)
 346                 return nil
 347         }
 348         return p
 349 }
 350
 351 func Start_job_xml_file_data(type_id string, control_ch chan dataTypes.JobControl, data_in_ch chan *dataTypes.KafkaPayload, data_out_channel chan *dataTypes.KafkaPayload, fvolume string, fsbucket string) {
 352
 353         log.Info("Type job", type_id, " started")
 354         topic_list := make(map[string]string)
 355         topic_list[type_id] = "json-file-ready-kp"
 356         topic_list["PmData"] = "json-file-ready-kpadp"
 357         running := true
 358         for {
 359                 select {
 360                 case job_ctl := <-control_ch:
 361                         log.Debug("Type job ", type_id, " new cmd received ", job_ctl.Command)
 362                         switch job_ctl.Command {
 363                         case "EXIT":
 364                                 //ignore cmd - handled by channel signal
 365                         }
 366
 367                 case msg := <-data_in_ch:
 368                         if msg == nil {
 369                                 log.Info("Type job ", type_id, " stopped by channel signal -  start_job_xml_file_data")
 370
 371                                 running = false
 372                                 return
 373                         }
 374                         jobLimiterChan <- struct{}{}
 375                         go run_xml_job(type_id, msg, "gz", data_out_channel, topic_list, jobLimiterChan, fvolume, fsbucket)
 376
 377                 case <-time.After(1 * time.Second):
 378                         if !running {
 379                                 return
 380                         }
 381                 }
 382         }
 383 }
 384
 385 func run_xml_job(type_id string, msg *dataTypes.KafkaPayload, outputCompression string, data_out_channel chan *dataTypes.KafkaPayload, topic_list map[string]string, jobLimiterChan chan struct{}, fvolume string, fsbucket string) {
 386         defer func() {
 387                 <-jobLimiterChan
 388         }()
 389         start := time.Now()
 390         var evt_data dataTypes.XmlFileEventHeader
 391
 392         err := jsoniter.Unmarshal(msg.Msg.Value, &evt_data)
 393         if err != nil {
 394                 log.Error("Cannot parse XmlFileEventHeader for type job: ", type_id, " - discarding message, error details", err)
 395                 return
 396         }
 397         log.Debug("Unmarshal file-collect event for type job: ", type_id, " time: ", time.Since(start).String())
 398
 399         start = time.Now()
 400         new_fn := miniocollector.Xml_to_json_conv(&evt_data)
 401         if err != nil {
 402                 log.Error("Cannot convert file ", evt_data.Name, " - discarding message, ", err)
 403                 return
 404         }
 405         log.Debug("Converted file to json: ", new_fn, " time", time.Since(start).String())
 406
 407         var fde dataTypes.FileDownloadedEvt
 408         fde.Filename = new_fn
 409         j, err := jsoniter.Marshal(fde)
 410
 411         if err != nil {
 412                 log.Error("Cannot marshal FileDownloadedEvt - discarding message, ", err)
 413                 return
 414         }
 415         msg.Msg.Value = j
 416
 417         msg.Msg.Key = []byte("\"" + evt_data.SourceName + "\"")
 418         log.Debug("Marshal file-collect event ", time.Since(start).String())
 419         log.Debug("Sending file-collect event to output topic(s)", len(topic_list))
 420         for _, v := range topic_list {
 421                 fmt.Println("Output Topic: " + v)
 422                 var kmsg *dataTypes.KafkaPayload = new(dataTypes.KafkaPayload)
 423                 kmsg.Msg = msg.Msg
 424                 kmsg.Topic = v
 425                 data_out_channel <- kmsg
 426         }
 427 }
 428
 429 func Fetch_token() (*kafka.OAuthBearerToken, error) {
 430         log.Debug("Get token inline")
 431         conf := &clientcredentials.Config{
 432                 ClientID:     creds_client_id,
 433                 ClientSecret: creds_client_secret,
 434                 TokenURL:     creds_service_url,
 435         }
 436         token, err := conf.Token(context.Background())
 437         if err != nil {
 438                 log.Warning("Cannot fetch access token: ", err)
 439                 return nil, err
 440         }
 441         extensions := map[string]string{}
 442         log.Debug("=====================================================")
 443         log.Debug("token: ", token)
 444         log.Debug("=====================================================")
 445         log.Debug("TokenValue: ", token.AccessToken)
 446         log.Debug("=====================================================")
 447         log.Debug("Expiration: ", token.Expiry)
 448         t := token.Expiry
 449         oauthBearerToken := kafka.OAuthBearerToken{
 450                 TokenValue: token.AccessToken,
 451                 Expiration: t,
 452                 Extensions: extensions,
 453         }
 454
 455         return &oauthBearerToken, nil
 456 }