hv-collector-xnf-simulator/src/main/kotlin/org/onap/dcae/collectors/veshv/simulators/xnf/impl/XnfSimulator.kt

   1 /*
   2  * ============LICENSE_START=======================================================
   3  * dcaegen2-collectors-veshv
   4  * ================================================================================
   5  * Copyright (C) 2018 NOKIA
   6  * ================================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END=========================================================
  19  */
  20 package org.onap.dcae.collectors.veshv.simulators.xnf.impl
  21
  22 import arrow.effects.IO
  23 import io.netty.buffer.Unpooled
  24 import io.netty.handler.ssl.ClientAuth
  25 import io.netty.handler.ssl.SslContext
  26 import io.netty.handler.ssl.SslContextBuilder
  27 import io.netty.handler.ssl.SslProvider
  28 import org.onap.dcae.collectors.veshv.domain.SecurityConfiguration
  29 import org.onap.dcae.collectors.veshv.domain.WireFrame
  30 import org.onap.dcae.collectors.veshv.domain.WireFrameEncoder
  31 import org.onap.dcae.collectors.veshv.simulators.xnf.config.SimulatorConfiguration
  32 import org.onap.dcae.collectors.veshv.utils.logging.Logger
  33 import org.reactivestreams.Publisher
  34 import reactor.core.publisher.Flux
  35 import reactor.core.publisher.Mono
  36 import reactor.core.publisher.ReplayProcessor
  37 import reactor.ipc.netty.NettyOutbound
  38 import reactor.ipc.netty.tcp.TcpClient
  39
  40
  41 /**
  42  * @author Jakub Dudycz <jakub.dudycz@nokia.com>
  43  * @since June 2018
  44  */
  45 internal class XnfSimulator(private val configuration: SimulatorConfiguration) {
  46
  47     private val client: TcpClient = TcpClient.builder()
  48             .options { opts ->
  49                 opts.host(configuration.vesHost)
  50                         .port(configuration.vesPort)
  51                         .sslContext(createSslContext(configuration.security))
  52             }
  53             .build()
  54
  55     fun sendIo(messages: Flux<WireFrame>) = IO<Unit> {
  56         sendRx(messages).block()
  57     }
  58
  59     fun sendRx(messages: Flux<WireFrame>): Mono<Void> {
  60         val complete = ReplayProcessor.create<Void>(1)
  61         client
  62                 .newHandler { _, output -> handler(complete, messages, output) }
  63                 .doOnError {
  64                     logger.info("Failed to connect to VesHvCollector on " +
  65                             "${configuration.vesHost}:${configuration.vesPort}")
  66                 }
  67                 .subscribe {
  68                     logger.info("Connected to VesHvCollector on " +
  69                             "${configuration.vesHost}:${configuration.vesPort}")
  70                 }
  71         return complete.then()
  72     }
  73
  74     private fun handler(complete: ReplayProcessor<Void>, messages: Flux<WireFrame>, nettyOutbound: NettyOutbound):
  75             Publisher<Void> {
  76         val encoder = WireFrameEncoder(nettyOutbound.alloc())
  77         val context = nettyOutbound.context()
  78
  79         context.onClose {
  80             logger.info { "Connection to ${context.address()} has been closed" }
  81         }
  82
  83         // TODO: Close channel after all messages have been sent
  84         // The code bellow doesn't work because it closes the channel earlier and not all are consumed...
  85 //        complete.subscribe {
  86 //            context.channel().disconnect().addListener {
  87 //                if (it.isSuccess)
  88 //                    logger.info { "Connection closed" }
  89 //                else
  90 //                    logger.warn("Failed to close the connection", it.cause())
  91 //            }
  92 //        }
  93
  94         val frames = messages
  95                 .map(encoder::encode)
  96                 .window(MAX_BATCH_SIZE)
  97
  98         return nettyOutbound
  99                 .options { it.flushOnBoundary() }
 100                 .sendGroups(frames)
 101                 .send(Mono.just(Unpooled.EMPTY_BUFFER))
 102                 .then {
 103                     logger.info("Messages have been sent")
 104                     complete.onComplete()
 105                 }
 106                 .then()
 107     }
 108
 109     private fun createSslContext(config: SecurityConfiguration): SslContext =
 110             SslContextBuilder.forClient()
 111                     .keyManager(config.cert.toFile(), config.privateKey.toFile())
 112                     .trustManager(config.trustedCert.toFile())
 113                     .sslProvider(SslProvider.OPENSSL)
 114                     .clientAuth(ClientAuth.REQUIRE)
 115                     .build()
 116
 117     companion object {
 118         private const val MAX_BATCH_SIZE = 128
 119         private val logger = Logger(XnfSimulator::class)
 120     }
 121 }