ms/blueprintsprocessor/modules/inbounds/selfservice-api/src/main/kotlin/org/onap/ccsdk/cds/blueprintsprocessor/selfservice/api/BluePrintProcessingKafkaConsumer.kt

   1 /*
   2  *  Copyright © 2019 IBM.
   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
  17 package org.onap.ccsdk.cds.blueprintsprocessor.selfservice.api
  18
  19 import kotlinx.coroutines.GlobalScope
  20 import kotlinx.coroutines.channels.consumeEach
  21 import kotlinx.coroutines.launch
  22 import kotlinx.coroutines.runBlocking
  23 import org.onap.ccsdk.cds.blueprintsprocessor.core.api.data.ExecutionServiceInput
  24 import org.onap.ccsdk.cds.blueprintsprocessor.message.service.BluePrintMessageLibPropertyService
  25 import org.onap.ccsdk.cds.blueprintsprocessor.message.service.BlueprintMessageConsumerService
  26 import org.onap.ccsdk.cds.controllerblueprints.core.BluePrintProcessorException
  27 import org.onap.ccsdk.cds.controllerblueprints.core.jsonAsType
  28 import org.onap.ccsdk.cds.controllerblueprints.core.logger
  29 import org.onap.ccsdk.cds.controllerblueprints.core.updateErrorMessage
  30 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty
  31 import org.springframework.boot.context.event.ApplicationReadyEvent
  32 import org.springframework.context.event.EventListener
  33 import org.springframework.stereotype.Service
  34 import java.util.concurrent.Phaser
  35 import javax.annotation.PreDestroy
  36
  37 @ConditionalOnProperty(
  38     name = ["blueprintsprocessor.messageconsumer.self-service-api.kafkaEnable"],
  39     havingValue = "true"
  40 )
  41 @Service
  42 open class BluePrintProcessingKafkaConsumer(
  43     private val bluePrintMessageLibPropertyService: BluePrintMessageLibPropertyService,
  44     private val executionServiceHandler: ExecutionServiceHandler
  45 ) {
  46
  47     val log = logger(BluePrintProcessingKafkaConsumer::class)
  48
  49     private val ph = Phaser(1)
  50
  51     private lateinit var blueprintMessageConsumerService: BlueprintMessageConsumerService
  52
  53     companion object {
  54         const val CONSUMER_SELECTOR = "self-service-api"
  55         const val PRODUCER_SELECTOR = "self-service-api"
  56     }
  57
  58     @EventListener(ApplicationReadyEvent::class)
  59     fun setupMessageListener() = GlobalScope.launch {
  60         try {
  61             log.info(
  62                 "Setting up message consumer($CONSUMER_SELECTOR)" +
  63                         "message producer($PRODUCER_SELECTOR)..."
  64             )
  65
  66             /** Get the Message Consumer Service **/
  67             blueprintMessageConsumerService = try {
  68                 bluePrintMessageLibPropertyService
  69                     .blueprintMessageConsumerService(CONSUMER_SELECTOR)
  70             } catch (e: BluePrintProcessorException) {
  71                 val errorMsg = "Failed creating Kafka consumer message service."
  72                 throw e.updateErrorMessage(SelfServiceApiDomains.SELF_SERVICE_API, errorMsg,
  73                         "Wrong Kafka selector provided or internal error in Kafka service.")
  74             } catch (e: Exception) {
  75                 throw BluePrintProcessorException("failed to create consumer service ${e.message}")
  76             }
  77
  78             /** Get the Message Producer Service **/
  79             val blueprintMessageProducerService = try {
  80                 bluePrintMessageLibPropertyService
  81                         .blueprintMessageProducerService(PRODUCER_SELECTOR)
  82             } catch (e: BluePrintProcessorException) {
  83                 val errorMsg = "Failed creating Kafka producer message service."
  84                 throw e.updateErrorMessage(SelfServiceApiDomains.SELF_SERVICE_API, errorMsg,
  85                         "Wrong Kafka selector provided or internal error in Kafka service.")
  86             } catch (e: Exception) {
  87                 throw BluePrintProcessorException("failed to create producer service ${e.message}")
  88             }
  89
  90             launch {
  91                 /** Subscribe to the consumer topics */
  92                 val additionalConfig: MutableMap<String, Any> = hashMapOf()
  93                 val channel = blueprintMessageConsumerService.subscribe(additionalConfig)
  94                 channel.consumeEach { message ->
  95                     launch {
  96                         try {
  97                             ph.register()
  98                             log.trace("Consumed Message : $message")
  99                             val executionServiceInput = message.jsonAsType<ExecutionServiceInput>()
 100                             val executionServiceOutput = executionServiceHandler.doProcess(executionServiceInput)
 101                             blueprintMessageProducerService.sendMessage(executionServiceOutput)
 102                         } catch (e: Exception) {
 103                             log.error("failed in processing the consumed message : $message", e)
 104                         } finally {
 105                             ph.arriveAndDeregister()
 106                         }
 107                     }
 108                 }
 109             }
 110         } catch (e: Exception) {
 111             log.error(
 112                 "failed to start message consumer($CONSUMER_SELECTOR) " +
 113                         "message producer($PRODUCER_SELECTOR) ", e
 114             )
 115         }
 116     }
 117
 118     @PreDestroy
 119     fun shutdownMessageListener() = runBlocking {
 120         try {
 121             log.info(
 122                 "Shutting down message consumer($CONSUMER_SELECTOR)" +
 123                         "message producer($PRODUCER_SELECTOR)..."
 124             )
 125             blueprintMessageConsumerService.shutDown()
 126             ph.arriveAndAwaitAdvance()
 127         } catch (e: Exception) {
 128             log.error("failed to shutdown message listener($CONSUMER_SELECTOR)", e)
 129         }
 130     }
 131 }