services/hv-ves-client/producer/ct/src/test/java/org/onap/dcaegen2/services/sdk/services/hvves/client/producer/ct/DummyCollector.java

   1 /*
   2  * ============LICENSE_START=======================================================
   3  * DCAEGEN2-SERVICES-SDK
   4  * ================================================================================
   5  * Copyright (C) 2019 Nokia. All rights reserved.
   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.dcaegen2.services.sdk.services.hvves.client.producer.ct;
  21
  22 import io.netty.buffer.ByteBuf;
  23 import java.net.InetSocketAddress;
  24 import java.time.Duration;
  25 import java.util.ArrayList;
  26 import java.util.Collections;
  27 import java.util.List;
  28 import java.util.stream.IntStream;
  29 import org.reactivestreams.Publisher;
  30 import reactor.core.publisher.Flux;
  31 import reactor.core.publisher.ReplayProcessor;
  32 import reactor.netty.DisposableServer;
  33 import reactor.netty.NettyInbound;
  34 import reactor.netty.NettyOutbound;
  35 import reactor.netty.tcp.TcpServer;
  36 import reactor.util.function.Tuple2;
  37
  38 /**
  39  * @author <a href="mailto:piotr.jaszczyk@nokia.com">Piotr Jaszczyk</a>
  40  */
  41 public class DummyCollector {
  42
  43     private final List<ByteBuf> receivedData = Collections.synchronizedList(new ArrayList<>());
  44     private DisposableServer server;
  45     private ReplayProcessor<ClientDisconnected> clientDisconnected = ReplayProcessor.create();
  46     private Flux<Integer> handledClientsCount = Flux.fromStream(IntStream.iterate(0, x -> x + 1).boxed())
  47             .zipWith(clientDisconnected)
  48             .map(Tuple2::getT1)
  49             .share();
  50
  51     public InetSocketAddress start() {
  52         server = TcpServer.create()
  53                 .host("localhost")
  54                 .port(6666)
  55                 .wiretap(true)
  56                 .handle(this::handleConnection)
  57                 .bindNow();
  58         return server.address();
  59     }
  60
  61     public void stop() {
  62         server.disposeNow();
  63         server = null;
  64     }
  65
  66     public void blockUntilFirstClientIsHandled(Duration timeout) {
  67         handledClientsCount.blockFirst(timeout);
  68     }
  69
  70     public void blockUntilFirstClientsAreHandled(int numClients, Duration timeout) {
  71         handledClientsCount.take(numClients).blockLast(timeout);
  72     }
  73
  74     public ByteBuf dataFromClient(int clientNumber) {
  75         return receivedData.get(clientNumber);
  76     }
  77
  78     public ByteBuf dataFromFirstClient() {
  79         return dataFromClient(0);
  80     }
  81
  82     private Publisher<Void> handleConnection(NettyInbound nettyInbound, NettyOutbound nettyOutbound) {
  83         nettyInbound.receive()
  84                 .aggregate()
  85                 .retain()
  86                 .log()
  87                 .doOnNext(this::collect)
  88                 .subscribe();
  89
  90         return nettyOutbound.neverComplete();
  91     }
  92
  93     private void collect(ByteBuf buf) {
  94         receivedData.add(buf);
  95         clientDisconnected.onNext(ClientDisconnected.INSTANCE);
  96     }
  97
  98
  99     private static final class ClientDisconnected {
 100
 101         private static final ClientDisconnected INSTANCE = new ClientDisconnected();
 102     }
 103 }