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/*
* Copyright © 2019 IBM.
* Modifications Copyright © 2021 Bell Canada.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onap.ccsdk.cds.blueprintsprocessor.selfservice.api
import io.micrometer.core.instrument.MeterRegistry
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.channels.consumeEach
import kotlinx.coroutines.launch
import kotlinx.coroutines.runBlocking
import org.onap.ccsdk.cds.blueprintsprocessor.core.api.data.ExecutionServiceInput
import org.onap.ccsdk.cds.blueprintsprocessor.message.BlueprintMessageMetricConstants
import org.onap.ccsdk.cds.blueprintsprocessor.message.service.BlueprintMessageLibPropertyService
import org.onap.ccsdk.cds.blueprintsprocessor.message.service.BlueprintMessageConsumerService
import org.onap.ccsdk.cds.blueprintsprocessor.message.utils.BlueprintMessageUtils
import org.onap.ccsdk.cds.controllerblueprints.core.BlueprintProcessorException
import org.onap.ccsdk.cds.controllerblueprints.core.jsonAsType
import org.onap.ccsdk.cds.controllerblueprints.core.logger
import org.onap.ccsdk.cds.controllerblueprints.core.updateErrorMessage
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty
import org.springframework.boot.context.event.ApplicationReadyEvent
import org.springframework.context.event.EventListener
import org.springframework.stereotype.Service
import java.nio.charset.Charset
import java.util.UUID
import java.util.concurrent.Phaser
import javax.annotation.PreDestroy
@ConditionalOnProperty(
name = ["blueprintsprocessor.messageconsumer.self-service-api.kafkaEnable"],
havingValue = "true"
)
@Service
open class BlueprintProcessingKafkaConsumer(
private val blueprintMessageLibPropertyService: BlueprintMessageLibPropertyService,
private val executionServiceHandler: ExecutionServiceHandler,
private val meterRegistry: MeterRegistry
) {
val log = logger(BlueprintProcessingKafkaConsumer::class)
private val ph = Phaser(1)
private lateinit var blueprintMessageConsumerService: BlueprintMessageConsumerService
companion object {
const val CONSUMER_SELECTOR = "self-service-api"
const val PRODUCER_SELECTOR = "self-service-api"
}
@EventListener(ApplicationReadyEvent::class)
fun setupMessageListener() = GlobalScope.launch {
try {
log.info(
"Setting up message consumer($CONSUMER_SELECTOR)" +
"message producer($PRODUCER_SELECTOR)..."
)
/** Get the Message Consumer Service **/
blueprintMessageConsumerService = try {
blueprintMessageLibPropertyService
.blueprintMessageConsumerService(CONSUMER_SELECTOR)
} catch (e: BlueprintProcessorException) {
val errorMsg = "Failed creating Kafka consumer message service."
throw e.updateErrorMessage(
SelfServiceApiDomains.SELF_SERVICE_API, errorMsg,
"Wrong Kafka selector provided or internal error in Kafka service."
)
} catch (e: Exception) {
throw BlueprintProcessorException("failed to create consumer service ${e.message}")
}
/** Get the Message Producer Service **/
val blueprintMessageProducerService = try {
blueprintMessageLibPropertyService
.blueprintMessageProducerService(PRODUCER_SELECTOR)
} catch (e: BlueprintProcessorException) {
val errorMsg = "Failed creating Kafka producer message service."
throw e.updateErrorMessage(
SelfServiceApiDomains.SELF_SERVICE_API, errorMsg,
"Wrong Kafka selector provided or internal error in Kafka service."
)
} catch (e: Exception) {
throw BlueprintProcessorException("failed to create producer service ${e.message}")
}
launch {
/** Subscribe to the consumer topics */
val additionalConfig: MutableMap<String, Any> = hashMapOf()
val channel = blueprintMessageConsumerService.subscribe(additionalConfig)
channel.consumeEach { message ->
launch {
try {
ph.register()
val key = message.key() ?: UUID.randomUUID().toString()
val value = String(message.value(), Charset.defaultCharset())
val executionServiceInput = value.jsonAsType<ExecutionServiceInput>()
log.info(
"Consumed Message : topic(${message.topic()}) " +
"partition(${message.partition()}) " +
"leaderEpoch(${message.leaderEpoch().get()}) " +
"offset(${message.offset()}) " +
"key(${message.key()}) " +
"CBA(${executionServiceInput.actionIdentifiers.blueprintName}/${executionServiceInput.actionIdentifiers.blueprintVersion}/${executionServiceInput.actionIdentifiers.actionName})"
)
val executionServiceOutput = executionServiceHandler.doProcess(executionServiceInput)
blueprintMessageProducerService.sendMessage(key, executionServiceOutput)
} catch (e: Exception) {
meterRegistry.counter(
BlueprintMessageMetricConstants.KAFKA_CONSUMED_MESSAGES_ERROR_COUNTER,
BlueprintMessageUtils.kafkaMetricTag(message.topic())
).increment()
log.error("failed in processing the consumed message : $message", e)
} finally {
ph.arriveAndDeregister()
}
}
}
}
} catch (e: Exception) {
log.error(
"failed to start message consumer($CONSUMER_SELECTOR) " +
"message producer($PRODUCER_SELECTOR) ",
e
)
}
}
@PreDestroy
fun shutdownMessageListener() = runBlocking {
try {
log.info(
"Shutting down message consumer($CONSUMER_SELECTOR)" +
"message producer($PRODUCER_SELECTOR)..."
)
blueprintMessageConsumerService.shutDown()
ph.arriveAndAwaitAdvance()
} catch (e: Exception) {
log.error("failed to shutdown message listener($CONSUMER_SELECTOR)", e)
}
}
}
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