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/*
* ============LICENSE_START=======================================================
* dcaegen2-collectors-veshv
* ================================================================================
* Copyright (C) 2018 NOKIA
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.dcae.collectors.veshv.simulators.dcaeapp.impl.adapters
import org.apache.kafka.clients.CommonClientConfigs
import org.apache.kafka.clients.consumer.ConsumerConfig
import org.apache.kafka.common.config.SaslConfigs
import org.apache.kafka.common.security.auth.SecurityProtocol
import org.apache.kafka.common.security.plain.internals.PlainSaslServer.PLAIN_MECHANISM
import org.apache.kafka.common.serialization.ByteArrayDeserializer
import org.onap.dcae.collectors.veshv.utils.logging.Logger
import reactor.core.publisher.Flux
import reactor.kafka.receiver.KafkaReceiver
import reactor.kafka.receiver.ReceiverOptions
import reactor.kafka.receiver.ReceiverRecord
/**
* @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
* @since May 2018
*/
internal class KafkaSource(private val receiver: KafkaReceiver<ByteArray, ByteArray>) {
fun start(): Flux<ReceiverRecord<ByteArray, ByteArray>> =
receiver.receive()
.also { logger.info { "Started Kafka source" } }
companion object {
private val logger = Logger(KafkaSource::class)
private const val LOGIN_MODULE_CLASS = "org.apache.kafka.common.security.plain.PlainLoginModule"
private const val USERNAME = "admin"
private const val PASSWORD = "admin_secret"
private const val JAAS_CONFIG = "$LOGIN_MODULE_CLASS required username=$USERNAME password=$PASSWORD;"
private val SASL_PLAINTEXT = (SecurityProtocol.SASL_PLAINTEXT as Enum<SecurityProtocol>).name
fun create(bootstrapServers: String, topics: Set<String>): KafkaSource {
return KafkaSource(KafkaReceiver.create(createReceiverOptions(bootstrapServers, topics)))
}
fun createReceiverOptions(bootstrapServers: String,
topics: Set<String>): ReceiverOptions<ByteArray, ByteArray>? {
val props = mapOf<String, Any>(
ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG to bootstrapServers,
ConsumerConfig.CLIENT_ID_CONFIG to "hv-collector-dcae-app-simulator",
ConsumerConfig.GROUP_ID_CONFIG to "hv-collector-simulators",
ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG to ByteArrayDeserializer::class.java,
ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG to ByteArrayDeserializer::class.java,
ConsumerConfig.AUTO_OFFSET_RESET_CONFIG to "earliest",
CommonClientConfigs.SECURITY_PROTOCOL_CONFIG to SASL_PLAINTEXT,
SaslConfigs.SASL_MECHANISM to PLAIN_MECHANISM,
SaslConfigs.SASL_JAAS_CONFIG to JAAS_CONFIG
)
return ReceiverOptions.create<ByteArray, ByteArray>(props)
.addAssignListener { partitions -> logger.debug { "Partitions assigned $partitions" } }
.addRevokeListener { partitions -> logger.debug { "Partitions revoked $partitions" } }
.subscription(topics)
}
}
}
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