Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2018-present Open Networking Foundation |
| 3 | |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package kafka |
| 17 | |
| 18 | import ( |
Scott Baker | fa2f6ee | 2019-11-19 14:53:14 -0800 | [diff] [blame] | 19 | "context" |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 20 | "errors" |
| 21 | "fmt" |
serkant.uluderya | b38671c | 2019-11-01 09:35:38 -0700 | [diff] [blame^] | 22 | "strings" |
| 23 | "sync" |
| 24 | "time" |
| 25 | |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 26 | "github.com/Shopify/sarama" |
| 27 | scc "github.com/bsm/sarama-cluster" |
Scott Baker | fa2f6ee | 2019-11-19 14:53:14 -0800 | [diff] [blame] | 28 | "github.com/eapache/go-resiliency/breaker" |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 29 | "github.com/golang/protobuf/proto" |
| 30 | "github.com/google/uuid" |
serkant.uluderya | b38671c | 2019-11-01 09:35:38 -0700 | [diff] [blame^] | 31 | "github.com/opencord/voltha-lib-go/v3/pkg/log" |
| 32 | ic "github.com/opencord/voltha-protos/v3/go/inter_container" |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 33 | ) |
| 34 | |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 35 | type returnErrorFunction func() error |
| 36 | |
| 37 | // consumerChannels represents one or more consumers listening on a kafka topic. Once a message is received on that |
| 38 | // topic, the consumer(s) broadcasts the message to all the listening channels. The consumer can be a partition |
| 39 | //consumer or a group consumer |
| 40 | type consumerChannels struct { |
| 41 | consumers []interface{} |
| 42 | channels []chan *ic.InterContainerMessage |
| 43 | } |
| 44 | |
| 45 | // SaramaClient represents the messaging proxy |
| 46 | type SaramaClient struct { |
| 47 | cAdmin sarama.ClusterAdmin |
| 48 | client sarama.Client |
| 49 | KafkaHost string |
| 50 | KafkaPort int |
| 51 | producer sarama.AsyncProducer |
| 52 | consumer sarama.Consumer |
| 53 | groupConsumers map[string]*scc.Consumer |
| 54 | lockOfGroupConsumers sync.RWMutex |
| 55 | consumerGroupPrefix string |
| 56 | consumerType int |
| 57 | consumerGroupName string |
| 58 | producerFlushFrequency int |
| 59 | producerFlushMessages int |
| 60 | producerFlushMaxmessages int |
| 61 | producerRetryMax int |
| 62 | producerRetryBackOff time.Duration |
| 63 | producerReturnSuccess bool |
| 64 | producerReturnErrors bool |
| 65 | consumerMaxwait int |
| 66 | maxProcessingTime int |
| 67 | numPartitions int |
| 68 | numReplicas int |
| 69 | autoCreateTopic bool |
| 70 | doneCh chan int |
| 71 | topicToConsumerChannelMap map[string]*consumerChannels |
| 72 | lockTopicToConsumerChannelMap sync.RWMutex |
| 73 | topicLockMap map[string]*sync.RWMutex |
| 74 | lockOfTopicLockMap sync.RWMutex |
| 75 | metadataMaxRetry int |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 76 | alive bool |
| 77 | liveness chan bool |
| 78 | livenessChannelInterval time.Duration |
| 79 | lastLivenessTime time.Time |
| 80 | started bool |
Scott Baker | 0fef698 | 2019-12-12 09:49:42 -0800 | [diff] [blame] | 81 | healthy bool |
| 82 | healthiness chan bool |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 83 | } |
| 84 | |
| 85 | type SaramaClientOption func(*SaramaClient) |
| 86 | |
| 87 | func Host(host string) SaramaClientOption { |
| 88 | return func(args *SaramaClient) { |
| 89 | args.KafkaHost = host |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | func Port(port int) SaramaClientOption { |
| 94 | return func(args *SaramaClient) { |
| 95 | args.KafkaPort = port |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | func ConsumerGroupPrefix(prefix string) SaramaClientOption { |
| 100 | return func(args *SaramaClient) { |
| 101 | args.consumerGroupPrefix = prefix |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | func ConsumerGroupName(name string) SaramaClientOption { |
| 106 | return func(args *SaramaClient) { |
| 107 | args.consumerGroupName = name |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | func ConsumerType(consumer int) SaramaClientOption { |
| 112 | return func(args *SaramaClient) { |
| 113 | args.consumerType = consumer |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | func ProducerFlushFrequency(frequency int) SaramaClientOption { |
| 118 | return func(args *SaramaClient) { |
| 119 | args.producerFlushFrequency = frequency |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | func ProducerFlushMessages(num int) SaramaClientOption { |
| 124 | return func(args *SaramaClient) { |
| 125 | args.producerFlushMessages = num |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | func ProducerFlushMaxMessages(num int) SaramaClientOption { |
| 130 | return func(args *SaramaClient) { |
| 131 | args.producerFlushMaxmessages = num |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | func ProducerMaxRetries(num int) SaramaClientOption { |
| 136 | return func(args *SaramaClient) { |
| 137 | args.producerRetryMax = num |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | func ProducerRetryBackoff(duration time.Duration) SaramaClientOption { |
| 142 | return func(args *SaramaClient) { |
| 143 | args.producerRetryBackOff = duration |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | func ProducerReturnOnErrors(opt bool) SaramaClientOption { |
| 148 | return func(args *SaramaClient) { |
| 149 | args.producerReturnErrors = opt |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | func ProducerReturnOnSuccess(opt bool) SaramaClientOption { |
| 154 | return func(args *SaramaClient) { |
| 155 | args.producerReturnSuccess = opt |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | func ConsumerMaxWait(wait int) SaramaClientOption { |
| 160 | return func(args *SaramaClient) { |
| 161 | args.consumerMaxwait = wait |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | func MaxProcessingTime(pTime int) SaramaClientOption { |
| 166 | return func(args *SaramaClient) { |
| 167 | args.maxProcessingTime = pTime |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | func NumPartitions(number int) SaramaClientOption { |
| 172 | return func(args *SaramaClient) { |
| 173 | args.numPartitions = number |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | func NumReplicas(number int) SaramaClientOption { |
| 178 | return func(args *SaramaClient) { |
| 179 | args.numReplicas = number |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | func AutoCreateTopic(opt bool) SaramaClientOption { |
| 184 | return func(args *SaramaClient) { |
| 185 | args.autoCreateTopic = opt |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | func MetadatMaxRetries(retry int) SaramaClientOption { |
| 190 | return func(args *SaramaClient) { |
| 191 | args.metadataMaxRetry = retry |
| 192 | } |
| 193 | } |
| 194 | |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 195 | func LivenessChannelInterval(opt time.Duration) SaramaClientOption { |
| 196 | return func(args *SaramaClient) { |
| 197 | args.livenessChannelInterval = opt |
| 198 | } |
| 199 | } |
| 200 | |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 201 | func NewSaramaClient(opts ...SaramaClientOption) *SaramaClient { |
| 202 | client := &SaramaClient{ |
| 203 | KafkaHost: DefaultKafkaHost, |
| 204 | KafkaPort: DefaultKafkaPort, |
| 205 | } |
| 206 | client.consumerType = DefaultConsumerType |
| 207 | client.producerFlushFrequency = DefaultProducerFlushFrequency |
| 208 | client.producerFlushMessages = DefaultProducerFlushMessages |
| 209 | client.producerFlushMaxmessages = DefaultProducerFlushMaxmessages |
| 210 | client.producerReturnErrors = DefaultProducerReturnErrors |
| 211 | client.producerReturnSuccess = DefaultProducerReturnSuccess |
| 212 | client.producerRetryMax = DefaultProducerRetryMax |
| 213 | client.producerRetryBackOff = DefaultProducerRetryBackoff |
| 214 | client.consumerMaxwait = DefaultConsumerMaxwait |
| 215 | client.maxProcessingTime = DefaultMaxProcessingTime |
| 216 | client.numPartitions = DefaultNumberPartitions |
| 217 | client.numReplicas = DefaultNumberReplicas |
| 218 | client.autoCreateTopic = DefaultAutoCreateTopic |
| 219 | client.metadataMaxRetry = DefaultMetadataMaxRetry |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 220 | client.livenessChannelInterval = DefaultLivenessChannelInterval |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 221 | |
| 222 | for _, option := range opts { |
| 223 | option(client) |
| 224 | } |
| 225 | |
| 226 | client.groupConsumers = make(map[string]*scc.Consumer) |
| 227 | |
| 228 | client.lockTopicToConsumerChannelMap = sync.RWMutex{} |
| 229 | client.topicLockMap = make(map[string]*sync.RWMutex) |
| 230 | client.lockOfTopicLockMap = sync.RWMutex{} |
| 231 | client.lockOfGroupConsumers = sync.RWMutex{} |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 232 | |
Scott Baker | 0fef698 | 2019-12-12 09:49:42 -0800 | [diff] [blame] | 233 | // healthy and alive until proven otherwise |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 234 | client.alive = true |
Scott Baker | 0fef698 | 2019-12-12 09:49:42 -0800 | [diff] [blame] | 235 | client.healthy = true |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 236 | |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 237 | return client |
| 238 | } |
| 239 | |
| 240 | func (sc *SaramaClient) Start() error { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 241 | logger.Info("Starting-kafka-sarama-client") |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 242 | |
| 243 | // Create the Done channel |
| 244 | sc.doneCh = make(chan int, 1) |
| 245 | |
| 246 | var err error |
| 247 | |
| 248 | // Add a cleanup in case of failure to startup |
| 249 | defer func() { |
| 250 | if err != nil { |
| 251 | sc.Stop() |
| 252 | } |
| 253 | }() |
| 254 | |
| 255 | // Create the Cluster Admin |
| 256 | if err = sc.createClusterAdmin(); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 257 | logger.Errorw("Cannot-create-cluster-admin", log.Fields{"error": err}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 258 | return err |
| 259 | } |
| 260 | |
| 261 | // Create the Publisher |
| 262 | if err := sc.createPublisher(); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 263 | logger.Errorw("Cannot-create-kafka-publisher", log.Fields{"error": err}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 264 | return err |
| 265 | } |
| 266 | |
| 267 | if sc.consumerType == DefaultConsumerType { |
| 268 | // Create the master consumers |
| 269 | if err := sc.createConsumer(); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 270 | logger.Errorw("Cannot-create-kafka-consumers", log.Fields{"error": err}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 271 | return err |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | // Create the topic to consumers/channel map |
| 276 | sc.topicToConsumerChannelMap = make(map[string]*consumerChannels) |
| 277 | |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 278 | logger.Info("kafka-sarama-client-started") |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 279 | |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 280 | sc.started = true |
| 281 | |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 282 | return nil |
| 283 | } |
| 284 | |
| 285 | func (sc *SaramaClient) Stop() { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 286 | logger.Info("stopping-sarama-client") |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 287 | |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 288 | sc.started = false |
| 289 | |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 290 | //Send a message over the done channel to close all long running routines |
| 291 | sc.doneCh <- 1 |
| 292 | |
| 293 | if sc.producer != nil { |
| 294 | if err := sc.producer.Close(); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 295 | logger.Errorw("closing-producer-failed", log.Fields{"error": err}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 296 | } |
| 297 | } |
| 298 | |
| 299 | if sc.consumer != nil { |
| 300 | if err := sc.consumer.Close(); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 301 | logger.Errorw("closing-partition-consumer-failed", log.Fields{"error": err}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 302 | } |
| 303 | } |
| 304 | |
| 305 | for key, val := range sc.groupConsumers { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 306 | logger.Debugw("closing-group-consumer", log.Fields{"topic": key}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 307 | if err := val.Close(); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 308 | logger.Errorw("closing-group-consumer-failed", log.Fields{"error": err, "topic": key}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 309 | } |
| 310 | } |
| 311 | |
| 312 | if sc.cAdmin != nil { |
| 313 | if err := sc.cAdmin.Close(); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 314 | logger.Errorw("closing-cluster-admin-failed", log.Fields{"error": err}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 315 | } |
| 316 | } |
| 317 | |
| 318 | //TODO: Clear the consumers map |
| 319 | //sc.clearConsumerChannelMap() |
| 320 | |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 321 | logger.Info("sarama-client-stopped") |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 322 | } |
| 323 | |
| 324 | //createTopic is an internal function to create a topic on the Kafka Broker. No locking is required as |
| 325 | // the invoking function must hold the lock |
| 326 | func (sc *SaramaClient) createTopic(topic *Topic, numPartition int, repFactor int) error { |
| 327 | // Set the topic details |
| 328 | topicDetail := &sarama.TopicDetail{} |
| 329 | topicDetail.NumPartitions = int32(numPartition) |
| 330 | topicDetail.ReplicationFactor = int16(repFactor) |
| 331 | topicDetail.ConfigEntries = make(map[string]*string) |
| 332 | topicDetails := make(map[string]*sarama.TopicDetail) |
| 333 | topicDetails[topic.Name] = topicDetail |
| 334 | |
| 335 | if err := sc.cAdmin.CreateTopic(topic.Name, topicDetail, false); err != nil { |
| 336 | if err == sarama.ErrTopicAlreadyExists { |
| 337 | // Not an error |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 338 | logger.Debugw("topic-already-exist", log.Fields{"topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 339 | return nil |
| 340 | } |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 341 | logger.Errorw("create-topic-failure", log.Fields{"error": err}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 342 | return err |
| 343 | } |
| 344 | // TODO: Wait until the topic has been created. No API is available in the Sarama clusterAdmin to |
| 345 | // do so. |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 346 | logger.Debugw("topic-created", log.Fields{"topic": topic, "numPartition": numPartition, "replicationFactor": repFactor}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 347 | return nil |
| 348 | } |
| 349 | |
| 350 | //CreateTopic is a public API to create a topic on the Kafka Broker. It uses a lock on a specific topic to |
| 351 | // ensure no two go routines are performing operations on the same topic |
| 352 | func (sc *SaramaClient) CreateTopic(topic *Topic, numPartition int, repFactor int) error { |
| 353 | sc.lockTopic(topic) |
| 354 | defer sc.unLockTopic(topic) |
| 355 | |
| 356 | return sc.createTopic(topic, numPartition, repFactor) |
| 357 | } |
| 358 | |
| 359 | //DeleteTopic removes a topic from the kafka Broker |
| 360 | func (sc *SaramaClient) DeleteTopic(topic *Topic) error { |
| 361 | sc.lockTopic(topic) |
| 362 | defer sc.unLockTopic(topic) |
| 363 | |
| 364 | // Remove the topic from the broker |
| 365 | if err := sc.cAdmin.DeleteTopic(topic.Name); err != nil { |
| 366 | if err == sarama.ErrUnknownTopicOrPartition { |
| 367 | // Not an error as does not exist |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 368 | logger.Debugw("topic-not-exist", log.Fields{"topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 369 | return nil |
| 370 | } |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 371 | logger.Errorw("delete-topic-failed", log.Fields{"topic": topic, "error": err}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 372 | return err |
| 373 | } |
| 374 | |
| 375 | // Clear the topic from the consumer channel. This will also close any consumers listening on that topic. |
| 376 | if err := sc.clearTopicFromConsumerChannelMap(*topic); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 377 | logger.Errorw("failure-clearing-channels", log.Fields{"topic": topic, "error": err}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 378 | return err |
| 379 | } |
| 380 | return nil |
| 381 | } |
| 382 | |
| 383 | // Subscribe registers a caller to a topic. It returns a channel that the caller can use to receive |
| 384 | // messages from that topic |
| 385 | func (sc *SaramaClient) Subscribe(topic *Topic, kvArgs ...*KVArg) (<-chan *ic.InterContainerMessage, error) { |
| 386 | sc.lockTopic(topic) |
| 387 | defer sc.unLockTopic(topic) |
| 388 | |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 389 | logger.Debugw("subscribe", log.Fields{"topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 390 | |
| 391 | // If a consumers already exist for that topic then resuse it |
| 392 | if consumerCh := sc.getConsumerChannel(topic); consumerCh != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 393 | logger.Debugw("topic-already-subscribed", log.Fields{"topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 394 | // Create a channel specific for that consumers and add it to the consumers channel map |
| 395 | ch := make(chan *ic.InterContainerMessage) |
| 396 | sc.addChannelToConsumerChannelMap(topic, ch) |
| 397 | return ch, nil |
| 398 | } |
| 399 | |
| 400 | // Register for the topic and set it up |
| 401 | var consumerListeningChannel chan *ic.InterContainerMessage |
| 402 | var err error |
| 403 | |
| 404 | // Use the consumerType option to figure out the type of consumer to launch |
| 405 | if sc.consumerType == PartitionConsumer { |
| 406 | if sc.autoCreateTopic { |
| 407 | if err = sc.createTopic(topic, sc.numPartitions, sc.numReplicas); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 408 | logger.Errorw("create-topic-failure", log.Fields{"error": err, "topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 409 | return nil, err |
| 410 | } |
| 411 | } |
| 412 | if consumerListeningChannel, err = sc.setupPartitionConsumerChannel(topic, getOffset(kvArgs...)); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 413 | logger.Warnw("create-consumers-channel-failure", log.Fields{"error": err, "topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 414 | return nil, err |
| 415 | } |
| 416 | } else if sc.consumerType == GroupCustomer { |
| 417 | // TODO: create topic if auto create is on. There is an issue with the sarama cluster library that |
| 418 | // does not consume from a precreated topic in some scenarios |
| 419 | //if sc.autoCreateTopic { |
| 420 | // if err = sc.createTopic(topic, sc.numPartitions, sc.numReplicas); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 421 | // logger.Errorw("create-topic-failure", logger.Fields{"error": err, "topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 422 | // return nil, err |
| 423 | // } |
| 424 | //} |
| 425 | //groupId := sc.consumerGroupName |
| 426 | groupId := getGroupId(kvArgs...) |
| 427 | // Include the group prefix |
| 428 | if groupId != "" { |
| 429 | groupId = sc.consumerGroupPrefix + groupId |
| 430 | } else { |
| 431 | // Need to use a unique group Id per topic |
| 432 | groupId = sc.consumerGroupPrefix + topic.Name |
| 433 | } |
| 434 | if consumerListeningChannel, err = sc.setupGroupConsumerChannel(topic, groupId, getOffset(kvArgs...)); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 435 | logger.Warnw("create-consumers-channel-failure", log.Fields{"error": err, "topic": topic.Name, "groupId": groupId}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 436 | return nil, err |
| 437 | } |
| 438 | |
| 439 | } else { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 440 | logger.Warnw("unknown-consumer-type", log.Fields{"consumer-type": sc.consumerType}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 441 | return nil, errors.New("unknown-consumer-type") |
| 442 | } |
| 443 | |
| 444 | return consumerListeningChannel, nil |
| 445 | } |
| 446 | |
| 447 | //UnSubscribe unsubscribe a consumer from a given topic |
| 448 | func (sc *SaramaClient) UnSubscribe(topic *Topic, ch <-chan *ic.InterContainerMessage) error { |
| 449 | sc.lockTopic(topic) |
| 450 | defer sc.unLockTopic(topic) |
| 451 | |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 452 | logger.Debugw("unsubscribing-channel-from-topic", log.Fields{"topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 453 | var err error |
| 454 | if err = sc.removeChannelFromConsumerChannelMap(*topic, ch); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 455 | logger.Errorw("failed-removing-channel", log.Fields{"error": err}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 456 | } |
| 457 | if err = sc.deleteFromGroupConsumers(topic.Name); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 458 | logger.Errorw("failed-deleting-group-consumer", log.Fields{"error": err}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 459 | } |
| 460 | return err |
| 461 | } |
| 462 | |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 463 | func (sc *SaramaClient) updateLiveness(alive bool) { |
| 464 | // Post a consistent stream of liveness data to the channel, |
| 465 | // so that in a live state, the core does not timeout and |
| 466 | // send a forced liveness message. Production of liveness |
| 467 | // events to the channel is rate-limited by livenessChannelInterval. |
| 468 | if sc.liveness != nil { |
| 469 | if sc.alive != alive { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 470 | logger.Info("update-liveness-channel-because-change") |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 471 | sc.liveness <- alive |
| 472 | sc.lastLivenessTime = time.Now() |
| 473 | } else if time.Now().Sub(sc.lastLivenessTime) > sc.livenessChannelInterval { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 474 | logger.Info("update-liveness-channel-because-interval") |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 475 | sc.liveness <- alive |
| 476 | sc.lastLivenessTime = time.Now() |
| 477 | } |
| 478 | } |
| 479 | |
| 480 | // Only emit a log message when the state changes |
| 481 | if sc.alive != alive { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 482 | logger.Info("set-client-alive", log.Fields{"alive": alive}) |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 483 | sc.alive = alive |
| 484 | } |
| 485 | } |
| 486 | |
Scott Baker | 0fef698 | 2019-12-12 09:49:42 -0800 | [diff] [blame] | 487 | // Once unhealthy, we never go back |
| 488 | func (sc *SaramaClient) setUnhealthy() { |
| 489 | sc.healthy = false |
| 490 | if sc.healthiness != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 491 | logger.Infow("set-client-unhealthy", log.Fields{"healthy": sc.healthy}) |
Scott Baker | 0fef698 | 2019-12-12 09:49:42 -0800 | [diff] [blame] | 492 | sc.healthiness <- sc.healthy |
| 493 | } |
| 494 | } |
| 495 | |
Scott Baker | fa2f6ee | 2019-11-19 14:53:14 -0800 | [diff] [blame] | 496 | func (sc *SaramaClient) isLivenessError(err error) bool { |
| 497 | // Sarama producers and consumers encapsulate the error inside |
| 498 | // a ProducerError or ConsumerError struct. |
| 499 | if prodError, ok := err.(*sarama.ProducerError); ok { |
| 500 | err = prodError.Err |
| 501 | } else if consumerError, ok := err.(*sarama.ConsumerError); ok { |
| 502 | err = consumerError.Err |
| 503 | } |
| 504 | |
| 505 | // Sarama-Cluster will compose the error into a ClusterError struct, |
| 506 | // which we can't do a compare by reference. To handle that, we the |
| 507 | // best we can do is compare the error strings. |
| 508 | |
| 509 | switch err.Error() { |
| 510 | case context.DeadlineExceeded.Error(): |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 511 | logger.Info("is-liveness-error-timeout") |
Scott Baker | fa2f6ee | 2019-11-19 14:53:14 -0800 | [diff] [blame] | 512 | return true |
| 513 | case sarama.ErrOutOfBrokers.Error(): // "Kafka: client has run out of available brokers" |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 514 | logger.Info("is-liveness-error-no-brokers") |
Scott Baker | fa2f6ee | 2019-11-19 14:53:14 -0800 | [diff] [blame] | 515 | return true |
| 516 | case sarama.ErrShuttingDown.Error(): // "Kafka: message received by producer in process of shutting down" |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 517 | logger.Info("is-liveness-error-shutting-down") |
Scott Baker | fa2f6ee | 2019-11-19 14:53:14 -0800 | [diff] [blame] | 518 | return true |
| 519 | case sarama.ErrControllerNotAvailable.Error(): // "Kafka: controller is not available" |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 520 | logger.Info("is-liveness-error-not-available") |
Scott Baker | fa2f6ee | 2019-11-19 14:53:14 -0800 | [diff] [blame] | 521 | return true |
| 522 | case breaker.ErrBreakerOpen.Error(): // "circuit breaker is open" |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 523 | logger.Info("is-liveness-error-circuit-breaker-open") |
Scott Baker | fa2f6ee | 2019-11-19 14:53:14 -0800 | [diff] [blame] | 524 | return true |
| 525 | } |
| 526 | |
| 527 | if strings.HasSuffix(err.Error(), "connection refused") { // "dial tcp 10.244.1.176:9092: connect: connection refused" |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 528 | logger.Info("is-liveness-error-connection-refused") |
Scott Baker | fa2f6ee | 2019-11-19 14:53:14 -0800 | [diff] [blame] | 529 | return true |
| 530 | } |
| 531 | |
Scott Baker | 718bee0 | 2020-01-07 09:52:02 -0800 | [diff] [blame] | 532 | if strings.HasSuffix(err.Error(), "i/o timeout") { // "dial tcp 10.244.1.176:9092: i/o timeout" |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 533 | logger.Info("is-liveness-error-io-timeout") |
Scott Baker | 718bee0 | 2020-01-07 09:52:02 -0800 | [diff] [blame] | 534 | return true |
| 535 | } |
| 536 | |
Scott Baker | fa2f6ee | 2019-11-19 14:53:14 -0800 | [diff] [blame] | 537 | // Other errors shouldn't trigger a loss of liveness |
| 538 | |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 539 | logger.Infow("is-liveness-error-ignored", log.Fields{"err": err}) |
Scott Baker | fa2f6ee | 2019-11-19 14:53:14 -0800 | [diff] [blame] | 540 | |
| 541 | return false |
| 542 | } |
| 543 | |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 544 | // send formats and sends the request onto the kafka messaging bus. |
| 545 | func (sc *SaramaClient) Send(msg interface{}, topic *Topic, keys ...string) error { |
| 546 | |
| 547 | // Assert message is a proto message |
| 548 | var protoMsg proto.Message |
| 549 | var ok bool |
| 550 | // ascertain the value interface type is a proto.Message |
| 551 | if protoMsg, ok = msg.(proto.Message); !ok { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 552 | logger.Warnw("message-not-proto-message", log.Fields{"msg": msg}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 553 | return errors.New(fmt.Sprintf("not-a-proto-msg-%s", msg)) |
| 554 | } |
| 555 | |
| 556 | var marshalled []byte |
| 557 | var err error |
| 558 | // Create the Sarama producer message |
| 559 | if marshalled, err = proto.Marshal(protoMsg); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 560 | logger.Errorw("marshalling-failed", log.Fields{"msg": protoMsg, "error": err}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 561 | return err |
| 562 | } |
| 563 | key := "" |
| 564 | if len(keys) > 0 { |
| 565 | key = keys[0] // Only the first key is relevant |
| 566 | } |
| 567 | kafkaMsg := &sarama.ProducerMessage{ |
| 568 | Topic: topic.Name, |
| 569 | Key: sarama.StringEncoder(key), |
| 570 | Value: sarama.ByteEncoder(marshalled), |
| 571 | } |
| 572 | |
| 573 | // Send message to kafka |
| 574 | sc.producer.Input() <- kafkaMsg |
| 575 | // Wait for result |
| 576 | // TODO: Use a lock or a different mechanism to ensure the response received corresponds to the message sent. |
| 577 | select { |
| 578 | case ok := <-sc.producer.Successes(): |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 579 | logger.Debugw("message-sent", log.Fields{"status": ok.Topic}) |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 580 | sc.updateLiveness(true) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 581 | case notOk := <-sc.producer.Errors(): |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 582 | logger.Debugw("error-sending", log.Fields{"status": notOk}) |
Scott Baker | fa2f6ee | 2019-11-19 14:53:14 -0800 | [diff] [blame] | 583 | if sc.isLivenessError(notOk) { |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 584 | sc.updateLiveness(false) |
| 585 | } |
| 586 | return notOk |
| 587 | } |
| 588 | return nil |
| 589 | } |
| 590 | |
| 591 | // Enable the liveness monitor channel. This channel will report |
| 592 | // a "true" or "false" on every publish, which indicates whether |
| 593 | // or not the channel is still live. This channel is then picked up |
| 594 | // by the service (i.e. rw_core / ro_core) to update readiness status |
| 595 | // and/or take other actions. |
| 596 | func (sc *SaramaClient) EnableLivenessChannel(enable bool) chan bool { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 597 | logger.Infow("kafka-enable-liveness-channel", log.Fields{"enable": enable}) |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 598 | if enable { |
| 599 | if sc.liveness == nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 600 | logger.Info("kafka-create-liveness-channel") |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 601 | // At least 1, so we can immediately post to it without blocking |
| 602 | // Setting a bigger number (10) allows the monitor to fall behind |
| 603 | // without blocking others. The monitor shouldn't really fall |
| 604 | // behind... |
| 605 | sc.liveness = make(chan bool, 10) |
| 606 | // post intial state to the channel |
| 607 | sc.liveness <- sc.alive |
| 608 | } |
| 609 | } else { |
| 610 | // TODO: Think about whether we need the ability to turn off |
| 611 | // liveness monitoring |
| 612 | panic("Turning off liveness reporting is not supported") |
| 613 | } |
| 614 | return sc.liveness |
| 615 | } |
| 616 | |
Scott Baker | 0fef698 | 2019-12-12 09:49:42 -0800 | [diff] [blame] | 617 | // Enable the Healthiness monitor channel. This channel will report "false" |
| 618 | // if the kafka consumers die, or some other problem occurs which is |
| 619 | // catastrophic that would require re-creating the client. |
| 620 | func (sc *SaramaClient) EnableHealthinessChannel(enable bool) chan bool { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 621 | logger.Infow("kafka-enable-healthiness-channel", log.Fields{"enable": enable}) |
Scott Baker | 0fef698 | 2019-12-12 09:49:42 -0800 | [diff] [blame] | 622 | if enable { |
| 623 | if sc.healthiness == nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 624 | logger.Info("kafka-create-healthiness-channel") |
Scott Baker | 0fef698 | 2019-12-12 09:49:42 -0800 | [diff] [blame] | 625 | // At least 1, so we can immediately post to it without blocking |
| 626 | // Setting a bigger number (10) allows the monitor to fall behind |
| 627 | // without blocking others. The monitor shouldn't really fall |
| 628 | // behind... |
| 629 | sc.healthiness = make(chan bool, 10) |
| 630 | // post intial state to the channel |
| 631 | sc.healthiness <- sc.healthy |
| 632 | } |
| 633 | } else { |
| 634 | // TODO: Think about whether we need the ability to turn off |
| 635 | // liveness monitoring |
| 636 | panic("Turning off healthiness reporting is not supported") |
| 637 | } |
| 638 | return sc.healthiness |
| 639 | } |
| 640 | |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 641 | // send an empty message on the liveness channel to check whether connectivity has |
| 642 | // been restored. |
| 643 | func (sc *SaramaClient) SendLiveness() error { |
| 644 | if !sc.started { |
| 645 | return fmt.Errorf("SendLiveness() called while not started") |
| 646 | } |
| 647 | |
| 648 | kafkaMsg := &sarama.ProducerMessage{ |
| 649 | Topic: "_liveness_test", |
| 650 | Value: sarama.StringEncoder(time.Now().Format(time.RFC3339)), // for debugging / informative use |
| 651 | } |
| 652 | |
| 653 | // Send message to kafka |
| 654 | sc.producer.Input() <- kafkaMsg |
| 655 | // Wait for result |
| 656 | // TODO: Use a lock or a different mechanism to ensure the response received corresponds to the message sent. |
| 657 | select { |
| 658 | case ok := <-sc.producer.Successes(): |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 659 | logger.Debugw("liveness-message-sent", log.Fields{"status": ok.Topic}) |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 660 | sc.updateLiveness(true) |
| 661 | case notOk := <-sc.producer.Errors(): |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 662 | logger.Debugw("liveness-error-sending", log.Fields{"status": notOk}) |
Scott Baker | fa2f6ee | 2019-11-19 14:53:14 -0800 | [diff] [blame] | 663 | if sc.isLivenessError(notOk) { |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 664 | sc.updateLiveness(false) |
| 665 | } |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 666 | return notOk |
| 667 | } |
| 668 | return nil |
| 669 | } |
| 670 | |
| 671 | // getGroupId returns the group id from the key-value args. |
| 672 | func getGroupId(kvArgs ...*KVArg) string { |
| 673 | for _, arg := range kvArgs { |
| 674 | if arg.Key == GroupIdKey { |
| 675 | return arg.Value.(string) |
| 676 | } |
| 677 | } |
| 678 | return "" |
| 679 | } |
| 680 | |
| 681 | // getOffset returns the offset from the key-value args. |
| 682 | func getOffset(kvArgs ...*KVArg) int64 { |
| 683 | for _, arg := range kvArgs { |
| 684 | if arg.Key == Offset { |
| 685 | return arg.Value.(int64) |
| 686 | } |
| 687 | } |
| 688 | return sarama.OffsetNewest |
| 689 | } |
| 690 | |
| 691 | func (sc *SaramaClient) createClusterAdmin() error { |
| 692 | kafkaFullAddr := fmt.Sprintf("%s:%d", sc.KafkaHost, sc.KafkaPort) |
| 693 | config := sarama.NewConfig() |
| 694 | config.Version = sarama.V1_0_0_0 |
| 695 | |
| 696 | // Create a cluster Admin |
| 697 | var cAdmin sarama.ClusterAdmin |
| 698 | var err error |
| 699 | if cAdmin, err = sarama.NewClusterAdmin([]string{kafkaFullAddr}, config); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 700 | logger.Errorw("cluster-admin-failure", log.Fields{"error": err, "broker-address": kafkaFullAddr}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 701 | return err |
| 702 | } |
| 703 | sc.cAdmin = cAdmin |
| 704 | return nil |
| 705 | } |
| 706 | |
| 707 | func (sc *SaramaClient) lockTopic(topic *Topic) { |
| 708 | sc.lockOfTopicLockMap.Lock() |
| 709 | if _, exist := sc.topicLockMap[topic.Name]; exist { |
| 710 | sc.lockOfTopicLockMap.Unlock() |
| 711 | sc.topicLockMap[topic.Name].Lock() |
| 712 | } else { |
| 713 | sc.topicLockMap[topic.Name] = &sync.RWMutex{} |
| 714 | sc.lockOfTopicLockMap.Unlock() |
| 715 | sc.topicLockMap[topic.Name].Lock() |
| 716 | } |
| 717 | } |
| 718 | |
| 719 | func (sc *SaramaClient) unLockTopic(topic *Topic) { |
| 720 | sc.lockOfTopicLockMap.Lock() |
| 721 | defer sc.lockOfTopicLockMap.Unlock() |
| 722 | if _, exist := sc.topicLockMap[topic.Name]; exist { |
| 723 | sc.topicLockMap[topic.Name].Unlock() |
| 724 | } |
| 725 | } |
| 726 | |
| 727 | func (sc *SaramaClient) addTopicToConsumerChannelMap(id string, arg *consumerChannels) { |
| 728 | sc.lockTopicToConsumerChannelMap.Lock() |
| 729 | defer sc.lockTopicToConsumerChannelMap.Unlock() |
| 730 | if _, exist := sc.topicToConsumerChannelMap[id]; !exist { |
| 731 | sc.topicToConsumerChannelMap[id] = arg |
| 732 | } |
| 733 | } |
| 734 | |
| 735 | func (sc *SaramaClient) deleteFromTopicToConsumerChannelMap(id string) { |
| 736 | sc.lockTopicToConsumerChannelMap.Lock() |
| 737 | defer sc.lockTopicToConsumerChannelMap.Unlock() |
| 738 | if _, exist := sc.topicToConsumerChannelMap[id]; exist { |
| 739 | delete(sc.topicToConsumerChannelMap, id) |
| 740 | } |
| 741 | } |
| 742 | |
| 743 | func (sc *SaramaClient) getConsumerChannel(topic *Topic) *consumerChannels { |
| 744 | sc.lockTopicToConsumerChannelMap.RLock() |
| 745 | defer sc.lockTopicToConsumerChannelMap.RUnlock() |
| 746 | |
| 747 | if consumerCh, exist := sc.topicToConsumerChannelMap[topic.Name]; exist { |
| 748 | return consumerCh |
| 749 | } |
| 750 | return nil |
| 751 | } |
| 752 | |
| 753 | func (sc *SaramaClient) addChannelToConsumerChannelMap(topic *Topic, ch chan *ic.InterContainerMessage) { |
| 754 | sc.lockTopicToConsumerChannelMap.Lock() |
| 755 | defer sc.lockTopicToConsumerChannelMap.Unlock() |
| 756 | if consumerCh, exist := sc.topicToConsumerChannelMap[topic.Name]; exist { |
| 757 | consumerCh.channels = append(consumerCh.channels, ch) |
| 758 | return |
| 759 | } |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 760 | logger.Warnw("consumers-channel-not-exist", log.Fields{"topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 761 | } |
| 762 | |
| 763 | //closeConsumers closes a list of sarama consumers. The consumers can either be a partition consumers or a group consumers |
| 764 | func closeConsumers(consumers []interface{}) error { |
| 765 | var err error |
| 766 | for _, consumer := range consumers { |
| 767 | // Is it a partition consumers? |
| 768 | if partionConsumer, ok := consumer.(sarama.PartitionConsumer); ok { |
| 769 | if errTemp := partionConsumer.Close(); errTemp != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 770 | logger.Debugw("partition!!!", log.Fields{"err": errTemp}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 771 | if strings.Compare(errTemp.Error(), sarama.ErrUnknownTopicOrPartition.Error()) == 0 { |
| 772 | // This can occur on race condition |
| 773 | err = nil |
| 774 | } else { |
| 775 | err = errTemp |
| 776 | } |
| 777 | } |
| 778 | } else if groupConsumer, ok := consumer.(*scc.Consumer); ok { |
| 779 | if errTemp := groupConsumer.Close(); errTemp != nil { |
| 780 | if strings.Compare(errTemp.Error(), sarama.ErrUnknownTopicOrPartition.Error()) == 0 { |
| 781 | // This can occur on race condition |
| 782 | err = nil |
| 783 | } else { |
| 784 | err = errTemp |
| 785 | } |
| 786 | } |
| 787 | } |
| 788 | } |
| 789 | return err |
| 790 | } |
| 791 | |
| 792 | func (sc *SaramaClient) removeChannelFromConsumerChannelMap(topic Topic, ch <-chan *ic.InterContainerMessage) error { |
| 793 | sc.lockTopicToConsumerChannelMap.Lock() |
| 794 | defer sc.lockTopicToConsumerChannelMap.Unlock() |
| 795 | if consumerCh, exist := sc.topicToConsumerChannelMap[topic.Name]; exist { |
| 796 | // Channel will be closed in the removeChannel method |
| 797 | consumerCh.channels = removeChannel(consumerCh.channels, ch) |
| 798 | // If there are no more channels then we can close the consumers itself |
| 799 | if len(consumerCh.channels) == 0 { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 800 | logger.Debugw("closing-consumers", log.Fields{"topic": topic}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 801 | err := closeConsumers(consumerCh.consumers) |
| 802 | //err := consumerCh.consumers.Close() |
| 803 | delete(sc.topicToConsumerChannelMap, topic.Name) |
| 804 | return err |
| 805 | } |
| 806 | return nil |
| 807 | } |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 808 | logger.Warnw("topic-does-not-exist", log.Fields{"topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 809 | return errors.New("topic-does-not-exist") |
| 810 | } |
| 811 | |
| 812 | func (sc *SaramaClient) clearTopicFromConsumerChannelMap(topic Topic) error { |
| 813 | sc.lockTopicToConsumerChannelMap.Lock() |
| 814 | defer sc.lockTopicToConsumerChannelMap.Unlock() |
| 815 | if consumerCh, exist := sc.topicToConsumerChannelMap[topic.Name]; exist { |
| 816 | for _, ch := range consumerCh.channels { |
| 817 | // Channel will be closed in the removeChannel method |
| 818 | removeChannel(consumerCh.channels, ch) |
| 819 | } |
| 820 | err := closeConsumers(consumerCh.consumers) |
| 821 | //if err == sarama.ErrUnknownTopicOrPartition { |
| 822 | // // Not an error |
| 823 | // err = nil |
| 824 | //} |
| 825 | //err := consumerCh.consumers.Close() |
| 826 | delete(sc.topicToConsumerChannelMap, topic.Name) |
| 827 | return err |
| 828 | } |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 829 | logger.Debugw("topic-does-not-exist", log.Fields{"topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 830 | return nil |
| 831 | } |
| 832 | |
| 833 | func (sc *SaramaClient) clearConsumerChannelMap() error { |
| 834 | sc.lockTopicToConsumerChannelMap.Lock() |
| 835 | defer sc.lockTopicToConsumerChannelMap.Unlock() |
| 836 | var err error |
| 837 | for topic, consumerCh := range sc.topicToConsumerChannelMap { |
| 838 | for _, ch := range consumerCh.channels { |
| 839 | // Channel will be closed in the removeChannel method |
| 840 | removeChannel(consumerCh.channels, ch) |
| 841 | } |
| 842 | if errTemp := closeConsumers(consumerCh.consumers); errTemp != nil { |
| 843 | err = errTemp |
| 844 | } |
| 845 | //err = consumerCh.consumers.Close() |
| 846 | delete(sc.topicToConsumerChannelMap, topic) |
| 847 | } |
| 848 | return err |
| 849 | } |
| 850 | |
| 851 | //createPublisher creates the publisher which is used to send a message onto kafka |
| 852 | func (sc *SaramaClient) createPublisher() error { |
| 853 | // This Creates the publisher |
| 854 | config := sarama.NewConfig() |
| 855 | config.Producer.Partitioner = sarama.NewRandomPartitioner |
| 856 | config.Producer.Flush.Frequency = time.Duration(sc.producerFlushFrequency) |
| 857 | config.Producer.Flush.Messages = sc.producerFlushMessages |
| 858 | config.Producer.Flush.MaxMessages = sc.producerFlushMaxmessages |
| 859 | config.Producer.Return.Errors = sc.producerReturnErrors |
| 860 | config.Producer.Return.Successes = sc.producerReturnSuccess |
| 861 | //config.Producer.RequiredAcks = sarama.WaitForAll |
| 862 | config.Producer.RequiredAcks = sarama.WaitForLocal |
| 863 | |
| 864 | kafkaFullAddr := fmt.Sprintf("%s:%d", sc.KafkaHost, sc.KafkaPort) |
| 865 | brokers := []string{kafkaFullAddr} |
| 866 | |
| 867 | if producer, err := sarama.NewAsyncProducer(brokers, config); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 868 | logger.Errorw("error-starting-publisher", log.Fields{"error": err}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 869 | return err |
| 870 | } else { |
| 871 | sc.producer = producer |
| 872 | } |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 873 | logger.Info("Kafka-publisher-created") |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 874 | return nil |
| 875 | } |
| 876 | |
| 877 | func (sc *SaramaClient) createConsumer() error { |
| 878 | config := sarama.NewConfig() |
| 879 | config.Consumer.Return.Errors = true |
| 880 | config.Consumer.Fetch.Min = 1 |
| 881 | config.Consumer.MaxWaitTime = time.Duration(sc.consumerMaxwait) * time.Millisecond |
| 882 | config.Consumer.MaxProcessingTime = time.Duration(sc.maxProcessingTime) * time.Millisecond |
| 883 | config.Consumer.Offsets.Initial = sarama.OffsetNewest |
| 884 | config.Metadata.Retry.Max = sc.metadataMaxRetry |
| 885 | kafkaFullAddr := fmt.Sprintf("%s:%d", sc.KafkaHost, sc.KafkaPort) |
| 886 | brokers := []string{kafkaFullAddr} |
| 887 | |
| 888 | if consumer, err := sarama.NewConsumer(brokers, config); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 889 | logger.Errorw("error-starting-consumers", log.Fields{"error": err}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 890 | return err |
| 891 | } else { |
| 892 | sc.consumer = consumer |
| 893 | } |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 894 | logger.Info("Kafka-consumers-created") |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 895 | return nil |
| 896 | } |
| 897 | |
| 898 | // createGroupConsumer creates a consumers group |
| 899 | func (sc *SaramaClient) createGroupConsumer(topic *Topic, groupId string, initialOffset int64, retries int) (*scc.Consumer, error) { |
| 900 | config := scc.NewConfig() |
| 901 | config.ClientID = uuid.New().String() |
| 902 | config.Group.Mode = scc.ConsumerModeMultiplex |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 903 | config.Consumer.Group.Heartbeat.Interval, _ = time.ParseDuration("1s") |
| 904 | config.Consumer.Return.Errors = true |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 905 | //config.Group.Return.Notifications = false |
| 906 | //config.Consumer.MaxWaitTime = time.Duration(DefaultConsumerMaxwait) * time.Millisecond |
| 907 | //config.Consumer.MaxProcessingTime = time.Duration(DefaultMaxProcessingTime) * time.Millisecond |
| 908 | config.Consumer.Offsets.Initial = initialOffset |
| 909 | //config.Consumer.Offsets.Initial = sarama.OffsetOldest |
| 910 | kafkaFullAddr := fmt.Sprintf("%s:%d", sc.KafkaHost, sc.KafkaPort) |
| 911 | brokers := []string{kafkaFullAddr} |
| 912 | |
| 913 | topics := []string{topic.Name} |
| 914 | var consumer *scc.Consumer |
| 915 | var err error |
| 916 | |
| 917 | if consumer, err = scc.NewConsumer(brokers, groupId, topics, config); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 918 | logger.Errorw("create-group-consumers-failure", log.Fields{"error": err, "topic": topic.Name, "groupId": groupId}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 919 | return nil, err |
| 920 | } |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 921 | logger.Debugw("create-group-consumers-success", log.Fields{"topic": topic.Name, "groupId": groupId}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 922 | |
| 923 | //sc.groupConsumers[topic.Name] = consumer |
| 924 | sc.addToGroupConsumers(topic.Name, consumer) |
| 925 | return consumer, nil |
| 926 | } |
| 927 | |
| 928 | // dispatchToConsumers sends the intercontainermessage received on a given topic to all subscribers for that |
| 929 | // topic via the unique channel each subscriber received during subscription |
| 930 | func (sc *SaramaClient) dispatchToConsumers(consumerCh *consumerChannels, protoMessage *ic.InterContainerMessage) { |
| 931 | // Need to go over all channels and publish messages to them - do we need to copy msg? |
| 932 | sc.lockTopicToConsumerChannelMap.RLock() |
| 933 | defer sc.lockTopicToConsumerChannelMap.RUnlock() |
| 934 | for _, ch := range consumerCh.channels { |
| 935 | go func(c chan *ic.InterContainerMessage) { |
| 936 | c <- protoMessage |
| 937 | }(ch) |
| 938 | } |
| 939 | } |
| 940 | |
| 941 | func (sc *SaramaClient) consumeFromAPartition(topic *Topic, consumer sarama.PartitionConsumer, consumerChnls *consumerChannels) { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 942 | logger.Debugw("starting-partition-consumption-loop", log.Fields{"topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 943 | startloop: |
| 944 | for { |
| 945 | select { |
| 946 | case err, ok := <-consumer.Errors(): |
| 947 | if ok { |
cbabu | d497865 | 2019-12-04 08:04:21 +0100 | [diff] [blame] | 948 | if sc.isLivenessError(err) { |
| 949 | sc.updateLiveness(false) |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 950 | logger.Warnw("partition-consumers-error", log.Fields{"error": err}) |
cbabu | d497865 | 2019-12-04 08:04:21 +0100 | [diff] [blame] | 951 | } |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 952 | } else { |
| 953 | // Channel is closed |
| 954 | break startloop |
| 955 | } |
| 956 | case msg, ok := <-consumer.Messages(): |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 957 | //logger.Debugw("message-received", logger.Fields{"msg": msg, "receivedTopic": msg.Topic}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 958 | if !ok { |
| 959 | // channel is closed |
| 960 | break startloop |
| 961 | } |
| 962 | msgBody := msg.Value |
cbabu | d497865 | 2019-12-04 08:04:21 +0100 | [diff] [blame] | 963 | sc.updateLiveness(true) |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 964 | logger.Debugw("message-received", log.Fields{"timestamp": msg.Timestamp, "receivedTopic": msg.Topic}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 965 | icm := &ic.InterContainerMessage{} |
| 966 | if err := proto.Unmarshal(msgBody, icm); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 967 | logger.Warnw("partition-invalid-message", log.Fields{"error": err}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 968 | continue |
| 969 | } |
| 970 | go sc.dispatchToConsumers(consumerChnls, icm) |
| 971 | case <-sc.doneCh: |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 972 | logger.Infow("partition-received-exit-signal", log.Fields{"topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 973 | break startloop |
| 974 | } |
| 975 | } |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 976 | logger.Infow("partition-consumer-stopped", log.Fields{"topic": topic.Name}) |
Scott Baker | 0fef698 | 2019-12-12 09:49:42 -0800 | [diff] [blame] | 977 | sc.setUnhealthy() |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 978 | } |
| 979 | |
| 980 | func (sc *SaramaClient) consumeGroupMessages(topic *Topic, consumer *scc.Consumer, consumerChnls *consumerChannels) { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 981 | logger.Debugw("starting-group-consumption-loop", log.Fields{"topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 982 | |
| 983 | startloop: |
| 984 | for { |
| 985 | select { |
| 986 | case err, ok := <-consumer.Errors(): |
| 987 | if ok { |
Scott Baker | fa2f6ee | 2019-11-19 14:53:14 -0800 | [diff] [blame] | 988 | if sc.isLivenessError(err) { |
| 989 | sc.updateLiveness(false) |
| 990 | } |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 991 | logger.Warnw("group-consumers-error", log.Fields{"topic": topic.Name, "error": err}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 992 | } else { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 993 | logger.Warnw("group-consumers-closed-err", log.Fields{"topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 994 | // channel is closed |
| 995 | break startloop |
| 996 | } |
| 997 | case msg, ok := <-consumer.Messages(): |
| 998 | if !ok { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 999 | logger.Warnw("group-consumers-closed-msg", log.Fields{"topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 1000 | // Channel closed |
| 1001 | break startloop |
| 1002 | } |
Scott Baker | 104b67d | 2019-10-29 15:56:27 -0700 | [diff] [blame] | 1003 | sc.updateLiveness(true) |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 1004 | logger.Debugw("message-received", log.Fields{"timestamp": msg.Timestamp, "receivedTopic": msg.Topic}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 1005 | msgBody := msg.Value |
| 1006 | icm := &ic.InterContainerMessage{} |
| 1007 | if err := proto.Unmarshal(msgBody, icm); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 1008 | logger.Warnw("invalid-message", log.Fields{"error": err}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 1009 | continue |
| 1010 | } |
| 1011 | go sc.dispatchToConsumers(consumerChnls, icm) |
| 1012 | consumer.MarkOffset(msg, "") |
| 1013 | case ntf := <-consumer.Notifications(): |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 1014 | logger.Debugw("group-received-notification", log.Fields{"notification": ntf}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 1015 | case <-sc.doneCh: |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 1016 | logger.Infow("group-received-exit-signal", log.Fields{"topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 1017 | break startloop |
| 1018 | } |
| 1019 | } |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 1020 | logger.Infow("group-consumer-stopped", log.Fields{"topic": topic.Name}) |
Scott Baker | 0fef698 | 2019-12-12 09:49:42 -0800 | [diff] [blame] | 1021 | sc.setUnhealthy() |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 1022 | } |
| 1023 | |
| 1024 | func (sc *SaramaClient) startConsumers(topic *Topic) error { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 1025 | logger.Debugw("starting-consumers", log.Fields{"topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 1026 | var consumerCh *consumerChannels |
| 1027 | if consumerCh = sc.getConsumerChannel(topic); consumerCh == nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 1028 | logger.Errorw("consumers-not-exist", log.Fields{"topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 1029 | return errors.New("consumers-not-exist") |
| 1030 | } |
| 1031 | // For each consumer listening for that topic, start a consumption loop |
| 1032 | for _, consumer := range consumerCh.consumers { |
| 1033 | if pConsumer, ok := consumer.(sarama.PartitionConsumer); ok { |
| 1034 | go sc.consumeFromAPartition(topic, pConsumer, consumerCh) |
| 1035 | } else if gConsumer, ok := consumer.(*scc.Consumer); ok { |
| 1036 | go sc.consumeGroupMessages(topic, gConsumer, consumerCh) |
| 1037 | } else { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 1038 | logger.Errorw("invalid-consumer", log.Fields{"topic": topic}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 1039 | return errors.New("invalid-consumer") |
| 1040 | } |
| 1041 | } |
| 1042 | return nil |
| 1043 | } |
| 1044 | |
| 1045 | //// setupConsumerChannel creates a consumerChannels object for that topic and add it to the consumerChannels map |
| 1046 | //// for that topic. It also starts the routine that listens for messages on that topic. |
| 1047 | func (sc *SaramaClient) setupPartitionConsumerChannel(topic *Topic, initialOffset int64) (chan *ic.InterContainerMessage, error) { |
| 1048 | var pConsumers []sarama.PartitionConsumer |
| 1049 | var err error |
| 1050 | |
| 1051 | if pConsumers, err = sc.createPartitionConsumers(topic, initialOffset); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 1052 | logger.Errorw("creating-partition-consumers-failure", log.Fields{"error": err, "topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 1053 | return nil, err |
| 1054 | } |
| 1055 | |
| 1056 | consumersIf := make([]interface{}, 0) |
| 1057 | for _, pConsumer := range pConsumers { |
| 1058 | consumersIf = append(consumersIf, pConsumer) |
| 1059 | } |
| 1060 | |
| 1061 | // Create the consumers/channel structure and set the consumers and create a channel on that topic - for now |
| 1062 | // unbuffered to verify race conditions. |
| 1063 | consumerListeningChannel := make(chan *ic.InterContainerMessage) |
| 1064 | cc := &consumerChannels{ |
| 1065 | consumers: consumersIf, |
| 1066 | channels: []chan *ic.InterContainerMessage{consumerListeningChannel}, |
| 1067 | } |
| 1068 | |
| 1069 | // Add the consumers channel to the map |
| 1070 | sc.addTopicToConsumerChannelMap(topic.Name, cc) |
| 1071 | |
| 1072 | //Start a consumers to listen on that specific topic |
| 1073 | go sc.startConsumers(topic) |
| 1074 | |
| 1075 | return consumerListeningChannel, nil |
| 1076 | } |
| 1077 | |
| 1078 | // setupConsumerChannel creates a consumerChannels object for that topic and add it to the consumerChannels map |
| 1079 | // for that topic. It also starts the routine that listens for messages on that topic. |
| 1080 | func (sc *SaramaClient) setupGroupConsumerChannel(topic *Topic, groupId string, initialOffset int64) (chan *ic.InterContainerMessage, error) { |
| 1081 | // TODO: Replace this development partition consumers with a group consumers |
| 1082 | var pConsumer *scc.Consumer |
| 1083 | var err error |
| 1084 | if pConsumer, err = sc.createGroupConsumer(topic, groupId, initialOffset, DefaultMaxRetries); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 1085 | logger.Errorw("creating-partition-consumers-failure", log.Fields{"error": err, "topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 1086 | return nil, err |
| 1087 | } |
| 1088 | // Create the consumers/channel structure and set the consumers and create a channel on that topic - for now |
| 1089 | // unbuffered to verify race conditions. |
| 1090 | consumerListeningChannel := make(chan *ic.InterContainerMessage) |
| 1091 | cc := &consumerChannels{ |
| 1092 | consumers: []interface{}{pConsumer}, |
| 1093 | channels: []chan *ic.InterContainerMessage{consumerListeningChannel}, |
| 1094 | } |
| 1095 | |
| 1096 | // Add the consumers channel to the map |
| 1097 | sc.addTopicToConsumerChannelMap(topic.Name, cc) |
| 1098 | |
| 1099 | //Start a consumers to listen on that specific topic |
| 1100 | go sc.startConsumers(topic) |
| 1101 | |
| 1102 | return consumerListeningChannel, nil |
| 1103 | } |
| 1104 | |
| 1105 | func (sc *SaramaClient) createPartitionConsumers(topic *Topic, initialOffset int64) ([]sarama.PartitionConsumer, error) { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 1106 | logger.Debugw("creating-partition-consumers", log.Fields{"topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 1107 | partitionList, err := sc.consumer.Partitions(topic.Name) |
| 1108 | if err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 1109 | logger.Warnw("get-partition-failure", log.Fields{"error": err, "topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 1110 | return nil, err |
| 1111 | } |
| 1112 | |
| 1113 | pConsumers := make([]sarama.PartitionConsumer, 0) |
| 1114 | for _, partition := range partitionList { |
| 1115 | var pConsumer sarama.PartitionConsumer |
| 1116 | if pConsumer, err = sc.consumer.ConsumePartition(topic.Name, partition, initialOffset); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 1117 | logger.Warnw("consumers-partition-failure", log.Fields{"error": err, "topic": topic.Name}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 1118 | return nil, err |
| 1119 | } |
| 1120 | pConsumers = append(pConsumers, pConsumer) |
| 1121 | } |
| 1122 | return pConsumers, nil |
| 1123 | } |
| 1124 | |
| 1125 | func removeChannel(channels []chan *ic.InterContainerMessage, ch <-chan *ic.InterContainerMessage) []chan *ic.InterContainerMessage { |
| 1126 | var i int |
| 1127 | var channel chan *ic.InterContainerMessage |
| 1128 | for i, channel = range channels { |
| 1129 | if channel == ch { |
| 1130 | channels[len(channels)-1], channels[i] = channels[i], channels[len(channels)-1] |
| 1131 | close(channel) |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 1132 | logger.Debug("channel-closed") |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 1133 | return channels[:len(channels)-1] |
| 1134 | } |
| 1135 | } |
| 1136 | return channels |
| 1137 | } |
| 1138 | |
| 1139 | func (sc *SaramaClient) addToGroupConsumers(topic string, consumer *scc.Consumer) { |
| 1140 | sc.lockOfGroupConsumers.Lock() |
| 1141 | defer sc.lockOfGroupConsumers.Unlock() |
| 1142 | if _, exist := sc.groupConsumers[topic]; !exist { |
| 1143 | sc.groupConsumers[topic] = consumer |
| 1144 | } |
| 1145 | } |
| 1146 | |
| 1147 | func (sc *SaramaClient) deleteFromGroupConsumers(topic string) error { |
| 1148 | sc.lockOfGroupConsumers.Lock() |
| 1149 | defer sc.lockOfGroupConsumers.Unlock() |
| 1150 | if _, exist := sc.groupConsumers[topic]; exist { |
| 1151 | consumer := sc.groupConsumers[topic] |
| 1152 | delete(sc.groupConsumers, topic) |
| 1153 | if err := consumer.Close(); err != nil { |
khenaidoo | b332f9b | 2020-01-16 16:25:26 -0500 | [diff] [blame] | 1154 | logger.Errorw("failure-closing-consumer", log.Fields{"error": err}) |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 1155 | return err |
| 1156 | } |
| 1157 | } |
| 1158 | return nil |
| 1159 | } |