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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.xnf.impl.adapters
import io.netty.handler.ssl.ClientAuth
import io.netty.handler.ssl.SslContext
import io.netty.handler.ssl.SslContextBuilder
import io.netty.handler.ssl.SslProvider
import org.onap.dcae.collectors.veshv.domain.EndOfTransmissionMessage
import org.onap.dcae.collectors.veshv.domain.PayloadWireFrameMessage
import org.onap.dcae.collectors.veshv.domain.SecurityConfiguration
import org.onap.dcae.collectors.veshv.domain.WireFrameEncoder
import org.onap.dcae.collectors.veshv.simulators.xnf.impl.config.SimulatorConfiguration
import org.onap.dcae.collectors.veshv.utils.arrow.asIo
import org.onap.dcae.collectors.veshv.utils.logging.Logger
import org.reactivestreams.Publisher
import reactor.core.publisher.Flux
import reactor.core.publisher.Mono
import reactor.core.publisher.ReplayProcessor
import reactor.ipc.netty.NettyOutbound
import reactor.ipc.netty.tcp.TcpClient
/**
* @author Jakub Dudycz <jakub.dudycz@nokia.com>
* @since June 2018
*/
class VesHvClient(private val configuration: SimulatorConfiguration) {
private val client: TcpClient = TcpClient.builder()
.options { opts ->
opts.host(configuration.vesHost)
.port(configuration.vesPort)
.sslContext(createSslContext(configuration.security))
}
.build()
fun sendIo(messages: Flux<PayloadWireFrameMessage>) =
sendRx(messages).then(Mono.just(Unit)).asIo()
private fun sendRx(messages: Flux<PayloadWireFrameMessage>): Mono<Void> {
val complete = ReplayProcessor.create<Void>(1)
client
.newHandler { _, output -> handler(complete, messages, output) }
.doOnError {
logger.info("Failed to connect to VesHvCollector on " +
"${configuration.vesHost}:${configuration.vesPort}")
}
.subscribe {
logger.info("Connected to VesHvCollector on " +
"${configuration.vesHost}:${configuration.vesPort}")
}
return complete.then()
}
private fun handler(complete: ReplayProcessor<Void>,
messages: Flux<PayloadWireFrameMessage>,
nettyOutbound: NettyOutbound): Publisher<Void> {
val allocator = nettyOutbound.alloc()
val encoder = WireFrameEncoder(allocator)
val frames = messages
.map(encoder::encode)
.window(MAX_BATCH_SIZE)
return nettyOutbound
.logConnectionClosed()
.options { it.flushOnBoundary() }
.sendGroups(frames)
.send(Mono.just(allocator.buffer().writeByte(eotMessageByte.toInt())))
.then {
logger.info("Messages have been sent")
complete.onComplete()
}
.then()
}
private fun createSslContext(config: SecurityConfiguration): SslContext =
SslContextBuilder.forClient()
.keyManager(config.cert.toFile(), config.privateKey.toFile())
.trustManager(config.trustedCert.toFile())
.sslProvider(SslProvider.OPENSSL)
.clientAuth(ClientAuth.REQUIRE)
.build()
private fun NettyOutbound.logConnectionClosed(): NettyOutbound {
context().onClose {
logger.info { "Connection to ${context().address()} has been closed" }
}
return this
}
companion object {
private val logger = Logger(VesHvClient::class)
private const val MAX_BATCH_SIZE = 128
private const val eotMessageByte = EndOfTransmissionMessage.MARKER_BYTE
}
}
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