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
11 * http://www.apache.org/licenses/LICENSE-2.0
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=========================================================
20 package org.onap.dcae.collectors.veshv.simulators.xnf.impl
22 import arrow.effects.IO
23 import org.onap.dcae.collectors.veshv.domain.WireFrame
24 import org.onap.dcae.collectors.veshv.simulators.xnf.config.MessageParameters
25 import org.onap.dcae.collectors.veshv.utils.logging.Logger
26 import ratpack.exec.Promise
27 import ratpack.handling.Chain
28 import ratpack.handling.Context
29 import ratpack.server.RatpackServer
30 import ratpack.server.ServerConfig
31 import reactor.core.publisher.Flux
32 import reactor.core.scheduler.Schedulers
33 import javax.json.Json
34 import javax.json.JsonObject
37 * @author Jakub Dudycz <jakub.dudycz@nokia.com>
40 class HttpServer(private val vesClient: VesHvClient) {
42 fun start(port: Int = DEFAULT_PORT): IO<RatpackServer> = IO {
43 RatpackServer.start { server ->
44 server.serverConfig(ServerConfig.embedded().port(port))
45 .handlers(this::configureHandlers)
50 private fun configureHandlers(chain: Chain) {
52 .post("simulator/sync") { ctx ->
53 createMessageFlux(ctx)
54 .map { vesClient.sendIo(it) }
55 .map { it.unsafeRunSync() }
56 .onError { handleException(it, ctx) }
57 .then { sendAcceptedResponse(ctx) }
59 .post("simulator/async") { ctx ->
60 createMessageFlux(ctx)
61 .map { vesClient.sendRx(it) }
62 .map { it.subscribeOn(Schedulers.elastic()).subscribe() }
63 .onError { handleException(it, ctx) }
64 .then { sendAcceptedResponse(ctx) }
68 private fun createMessageFlux(ctx: Context): Promise<Flux<WireFrame>> {
69 return ctx.request.body
70 .map { Json.createReader(it.inputStream).readObject() }
71 .map { extractMessageParameters(it) }
72 .map { MessageFactory.INSTANCE.createMessageFlux(it) }
75 private fun sendAcceptedResponse(ctx: Context) {
78 .send(CONTENT_TYPE_APPLICATION_JSON, Json.createObjectBuilder()
79 .add("response", "Request accepted")
84 private fun handleException(t: Throwable, ctx: Context) {
85 logger.warn("Failed to process the request - ${t.localizedMessage}")
86 logger.debug("Exception thrown when processing the request", t)
88 .status(STATUS_BAD_REQUEST)
89 .send(CONTENT_TYPE_APPLICATION_JSON, Json.createObjectBuilder()
90 .add("response", "Request was not accepted")
91 .add("exception", t.localizedMessage)
96 private fun extractMessageParameters(request: JsonObject): MessageParameters =
98 val commonEventHeader = MessageFactory.INSTANCE
99 .parseCommonHeader(request.getJsonObject("commonEventHeader"))
100 val messagesAmount = request.getJsonNumber("messagesAmount").longValue()
101 MessageParameters(commonEventHeader, messagesAmount)
102 } catch (e: Exception) {
103 throw ValidationException("Validating request body failed", e)
108 private val logger = Logger(HttpServer::class)
109 const val DEFAULT_PORT = 5000
110 const val STATUS_OK = 200
111 const val STATUS_BAD_REQUEST = 400
112 const val CONTENT_TYPE_APPLICATION_JSON = "application/json"
116 internal class ValidationException(message: String?, cause: Exception) : Exception(message, cause)