gerrit.onap Code Review - dcaegen2/collectors/hv-ves.git/blob

   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.adapters
  21
  22 import arrow.core.Option
  23 import io.netty.handler.ssl.ClientAuth
  24 import io.netty.handler.ssl.SslContext
  25 import io.netty.handler.ssl.SslContextBuilder
  26 import io.netty.handler.ssl.SslProvider
  27 import org.onap.dcae.collectors.veshv.domain.EndOfTransmissionMessage
  28 import org.onap.dcae.collectors.veshv.domain.PayloadWireFrameMessage
  29 import org.onap.dcae.collectors.veshv.domain.SecurityConfiguration
  30 import org.onap.dcae.collectors.veshv.domain.WireFrameEncoder
  31 import org.onap.dcae.collectors.veshv.simulators.xnf.impl.config.SimulatorConfiguration
  32 import org.onap.dcae.collectors.veshv.utils.arrow.asIo
  33 import org.onap.dcae.collectors.veshv.utils.logging.Logger
  34 import org.reactivestreams.Publisher
  35 import reactor.core.publisher.Flux
  36 import reactor.core.publisher.Mono
  37 import reactor.core.publisher.ReplayProcessor
  38 import reactor.ipc.netty.NettyOutbound
  39 import reactor.ipc.netty.tcp.TcpClient
  40
  41
  42 /**
  43  * @author Jakub Dudycz <jakub.dudycz@nokia.com>
  44  * @since June 2018
  45  */
  46 class VesHvClient(private val configuration: SimulatorConfiguration) {
  47
  48     private val client: TcpClient = TcpClient.builder()
  49             .options { opts ->
  50                 opts.host(configuration.vesHost)
  51                         .port(configuration.vesPort)
  52                         .sslContext(createSslContext(configuration.security).orNull())
  53             }
  54             .build()
  55
  56     fun sendIo(messages: Flux<PayloadWireFrameMessage>) =
  57             sendRx(messages).then(Mono.just(Unit)).asIo()
  58
  59     private fun sendRx(messages: Flux<PayloadWireFrameMessage>): 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>,
  75                         messages: Flux<PayloadWireFrameMessage>,
  76                         nettyOutbound: NettyOutbound): Publisher<Void> {
  77
  78         val allocator = nettyOutbound.alloc()
  79         val encoder = WireFrameEncoder(allocator)
  80         val frames = messages
  81                 .map(encoder::encode)
  82                 .window(MAX_BATCH_SIZE)
  83
  84         return nettyOutbound
  85                 .logConnectionClosed()
  86                 .options { it.flushOnBoundary() }
  87                 .sendGroups(frames)
  88                 .send(Mono.just(allocator.buffer().writeByte(eotMessageByte.toInt())))
  89                 .then {
  90                     logger.info("Messages have been sent")
  91                     complete.onComplete()
  92                 }
  93                 .then()
  94     }
  95
  96     private fun createSslContext(config: SecurityConfiguration): Option<SslContext> =
  97             if (config.sslDisable) {
  98                 Option.empty()
  99             } else {
 100                 Option.just(
 101                         SslContextBuilder.forClient()
 102                                 .keyManager(config.cert.toFile(), config.privateKey.toFile())
 103                                 .trustManager(config.trustedCert.toFile())
 104                                 .sslProvider(SslProvider.OPENSSL)
 105                                 .clientAuth(ClientAuth.REQUIRE)
 106                                 .build()
 107                 )
 108             }
 109
 110     private fun NettyOutbound.logConnectionClosed(): NettyOutbound {
 111         context().onClose {
 112             logger.info { "Connection to ${context().address()} has been closed" }
 113         }
 114         return this
 115     }
 116
 117     companion object {
 118         private val logger = Logger(VesHvClient::class)
 119         private const val MAX_BATCH_SIZE = 128
 120         private const val eotMessageByte = EndOfTransmissionMessage.MARKER_BYTE
 121     }
 122 }