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/*
* ============LICENSE_START=======================================================
* dcaegen2-collectors-veshv
* ================================================================================
* Copyright (C) 2019 NOKIA
* Copyright (C) 2022 Nordix Foundation.
* ================================================================================
* 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.impl.adapters.kafka
import org.apache.kafka.clients.CommonClientConfigs
import org.apache.kafka.clients.producer.ProducerConfig
import org.apache.kafka.common.config.SaslConfigs
import org.apache.kafka.common.security.auth.SecurityProtocol
import org.apache.kafka.common.security.plain.internals.PlainSaslServer
import org.apache.kafka.common.security.scram.internals.ScramMechanism
import org.onap.dcae.collectors.veshv.domain.VesMessage
import org.onap.dcae.collectors.veshv.utils.applyIf
import org.onap.dcaegen2.services.sdk.model.streams.AafCredentials
import org.onap.dcaegen2.services.sdk.model.streams.dmaap.KafkaSink
import org.onap.ves.VesEventOuterClass.CommonEventHeader
import reactor.kafka.sender.SenderOptions
import java.lang.Boolean.parseBoolean
internal object KafkaSenderOptionsFactory {
private const val MAXIMUM_REQUEST_SIZE_MULTIPLIER = 1.2f
private const val BUFFER_MEMORY_MULTIPLIER = 32
private const val MINIMUM_BUFFER_MEMORY = 32 * 1024 * 1024
private const val LOGIN_MODULE_CLASS = "org.apache.kafka.common.security.plain.PlainLoginModule"
private val SASL_PLAINTEXT = (SecurityProtocol.SASL_PLAINTEXT as Enum<SecurityProtocol>).name
private val USE_SCRAM = parseBoolean(System.getenv().getOrDefault("USE_SCRAM", "false"))
fun createSenderOptions(kafkaSink: KafkaSink): SenderOptions<CommonEventHeader, VesMessage> =
SenderOptions.create<CommonEventHeader, VesMessage>()
.producerProperty(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, kafkaSink.bootstrapServers())
.producerProperty(ProducerConfig.MAX_REQUEST_SIZE_CONFIG, maxRequestSize(kafkaSink))
.producerProperty(ProducerConfig.BUFFER_MEMORY_CONFIG, bufferMemory(kafkaSink))
.producerProperty(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, ProtobufSerializer::class.java)
.producerProperty(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, VesMessageSerializer::class.java)
.producerProperty(ProducerConfig.MAX_IN_FLIGHT_REQUESTS_PER_CONNECTION, 1)
.producerProperty(ProducerConfig.RETRIES_CONFIG, 1)
.producerProperty(ProducerConfig.ACKS_CONFIG, "1")
.stopOnError(false)
.applyIf(kafkaSink.aafCredentials() != null) {
producerProperty(CommonClientConfigs.SECURITY_PROTOCOL_CONFIG, SASL_PLAINTEXT)
.producerProperty(SaslConfigs.SASL_MECHANISM, PlainSaslServer.PLAIN_MECHANISM)
.producerProperty(SaslConfigs.SASL_JAAS_CONFIG, jaasConfig(kafkaSink.aafCredentials()!!))
}
.applyIf(USE_SCRAM) {
producerProperty(CommonClientConfigs.SECURITY_PROTOCOL_CONFIG, SASL_PLAINTEXT)
.producerProperty(SaslConfigs.SASL_MECHANISM, ScramMechanism.SCRAM_SHA_512.mechanismName())
.producerProperty(SaslConfigs.SASL_JAAS_CONFIG, System.getenv("JAAS_CONFIG"))
}
private fun jaasConfig(aafCredentials: AafCredentials) =
"""$LOGIN_MODULE_CLASS required username="${aafCredentials.username().jaasEscape()}" password="${aafCredentials.password().jaasEscape()}";"""
private fun String?.jaasEscape() = this?.replace("\"", "\\\"")
private fun maxRequestSize(kafkaSink: KafkaSink) =
(MAXIMUM_REQUEST_SIZE_MULTIPLIER * kafkaSink.maxPayloadSizeBytes()).toInt()
private fun bufferMemory(kafkaSink: KafkaSink) =
Integer.max(MINIMUM_BUFFER_MEMORY, BUFFER_MEMORY_MULTIPLIER * kafkaSink.maxPayloadSizeBytes())
}
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