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

   1 /*
   2  * ============LICENSE_START=======================================================
   3  * dcaegen2-collectors-veshv
   4  * ================================================================================
   5  * Copyright (C) 2018-2019 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.Either
  23 import org.onap.dcae.collectors.veshv.simulators.xnf.impl.OngoingSimulations
  24 import org.onap.dcae.collectors.veshv.simulators.xnf.impl.XnfSimulator
  25 import org.onap.dcae.collectors.veshv.utils.NettyServerHandle
  26 import org.onap.dcae.collectors.veshv.utils.ServerHandle
  27 import org.onap.dcae.collectors.veshv.utils.http.Response
  28 import org.onap.dcae.collectors.veshv.utils.http.Responses
  29 import org.onap.dcae.collectors.veshv.utils.http.sendAndHandleErrors
  30 import org.onap.dcae.collectors.veshv.utils.http.sendEitherErrorOrResponse
  31 import org.onap.dcae.collectors.veshv.utils.logging.Logger
  32 import org.onap.dcae.collectors.veshv.ves.message.generator.api.ParsingError
  33 import reactor.core.publisher.Mono
  34 import reactor.netty.http.server.HttpServer
  35 import reactor.netty.http.server.HttpServerRequest
  36 import reactor.netty.http.server.HttpServerResponse
  37 import reactor.netty.http.server.HttpServerRoutes
  38 import java.io.InputStream
  39 import java.net.InetSocketAddress
  40 import java.util.*
  41
  42 /**
  43  * @author Jakub Dudycz <jakub.dudycz@nokia.com>
  44  * @since June 2018
  45  */
  46 internal class XnfApiServer(
  47         private val xnfSimulator: XnfSimulator,
  48         private val ongoingSimulations: OngoingSimulations) {
  49
  50     fun start(socketAddress: InetSocketAddress): Mono<ServerHandle> =
  51             HttpServer.create()
  52                     .host(socketAddress.hostName)
  53                     .port(socketAddress.port)
  54                     .route(::setRoutes)
  55                     .bind()
  56                     .map { NettyServerHandle(it) }
  57
  58
  59     private fun setRoutes(route: HttpServerRoutes) {
  60         route
  61                 .post("/simulator", ::startSimulationHandler)
  62                 .post("/simulator/async", ::startSimulationHandler)
  63                 .get("/simulator/:id", ::simulatorStatusHandler)
  64     }
  65
  66     private fun startSimulationHandler(req: HttpServerRequest, res: HttpServerResponse): Mono<Void> {
  67         logger.info { "Attempting to start asynchronous scenario" }
  68         return req.receive().aggregate().asInputStream()
  69                 .flatMap { body ->
  70                     val id = startSimulation(body)
  71                     when (id) {
  72                         is Either.Left -> logger.warn { "Failed to start scenario, ${id.a}" }
  73                         is Either.Right -> logger.info { "Scenario started, details: ${id.b}" }
  74                     }
  75                     res.sendEitherErrorOrResponse(id)
  76                 }
  77     }
  78
  79
  80     private fun startSimulation(body: InputStream): Either<ParsingError, Response> =
  81             xnfSimulator.startSimulation(body)
  82                     .map(ongoingSimulations::startAsynchronousSimulation)
  83                     .map(Responses::acceptedResponse)
  84
  85
  86     private fun simulatorStatusHandler(req: HttpServerRequest, res: HttpServerResponse): Mono<Void> {
  87         logger.debug { "Checking task status" }
  88         val id = UUID.fromString(req.param("id"))
  89         logger.debug { "Checking status for id: $id" }
  90         val status = ongoingSimulations.status(id)
  91         val response = Responses.statusResponse(status.toString(), status.message)
  92         logger.info { "Task $id status: $response" }
  93         return res.sendAndHandleErrors(Mono.just(response))
  94     }
  95
  96     companion object {
  97         private val logger = Logger(XnfApiServer::class)
  98     }
  99 }