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.WireFrameMessage
  28 import org.onap.dcae.collectors.veshv.domain.SecurityConfiguration
  29 import org.onap.dcae.collectors.veshv.domain.WireFrameEncoder
  30 import org.onap.dcae.collectors.veshv.simulators.xnf.impl.config.SimulatorConfiguration
  31 import org.onap.dcae.collectors.veshv.ssl.boundary.ClientSslContextFactory
  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.netty.NettyOutbound
  39 import reactor.netty.tcp.TcpClient
  40
  41 /**
  42  * @author Jakub Dudycz <jakub.dudycz@nokia.com>
  43  * @since June 2018
  44  */
  45 class VesHvClient(private val configuration: SimulatorConfiguration) {
  46
  47     private val client: TcpClient = TcpClient.create()
  48             .host(configuration.vesHost)
  49             .port(configuration.vesPort)
  50             .secure { sslSpec ->
  51                 createSslContext(configuration.security).fold({}, sslSpec::sslContext)
  52             }
  53
  54     fun sendIo(messages: Flux<WireFrameMessage>) =
  55             sendRx(messages).then(Mono.just(Unit)).asIo()
  56
  57     private fun sendRx(messages: Flux<WireFrameMessage>): Mono<Void> {
  58         val complete = ReplayProcessor.create<Void>(1)
  59         client
  60                 .handle { _, output -> handler(complete, messages, output) }
  61                 .connect()
  62                 .doOnError {
  63                     logger.info("Failed to connect to VesHvCollector on " +
  64                             "${configuration.vesHost}:${configuration.vesPort}")
  65                 }
  66                 .subscribe {
  67                     logger.info("Connected to VesHvCollector on " +
  68                             "${configuration.vesHost}:${configuration.vesPort}")
  69                 }
  70         return complete.then()
  71     }
  72
  73     private fun handler(complete: ReplayProcessor<Void>,
  74                         messages: Flux<WireFrameMessage>,
  75                         nettyOutbound: NettyOutbound): Publisher<Void> {
  76
  77         val allocator = nettyOutbound.alloc()
  78         val encoder = WireFrameEncoder(allocator)
  79         val frames = messages
  80                 .map(encoder::encode)
  81                 .window(MAX_BATCH_SIZE)
  82
  83         return nettyOutbound
  84                 .logConnectionClosed()
  85                 .options { it.flushOnBoundary() }
  86                 .sendGroups(frames)
  87                 .then {
  88                     logger.info("Messages have been sent")
  89                     complete.onComplete()
  90                 }
  91                 .then()
  92     }
  93
  94     private fun createSslContext(config: SecurityConfiguration): Option<SslContext> =
  95             ClientSslContextFactory().createSslContext(config)
  96
  97     private fun NettyOutbound.logConnectionClosed() =
  98             withConnection { conn ->
  99                 conn.onTerminate().subscribe {
 100                     logger.info { "Connection to ${conn.address()} has been closed" }
 101                 }
 102             }
 103
 104     companion object {
 105         private val logger = Logger(VesHvClient::class)
 106         private const val MAX_BATCH_SIZE = 128
 107     }
 108 }