gerrit.onap Code Review - dcaegen2/services/sdk.git/blob

   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
  24 import java.net.InetSocketAddress;
  25 import java.time.Duration;
  26 import java.util.ArrayList;
  27 import java.util.Collections;
  28 import java.util.List;
  29 import java.util.Optional;
  30 import java.util.stream.IntStream;
  31
  32 import io.netty.handler.ssl.SslContext;
  33 import org.reactivestreams.Publisher;
  34 import reactor.core.publisher.Flux;
  35 import reactor.core.publisher.ReplayProcessor;
  36 import reactor.netty.DisposableServer;
  37 import reactor.netty.NettyInbound;
  38 import reactor.netty.NettyOutbound;
  39 import reactor.netty.tcp.TcpServer;
  40 import reactor.util.function.Tuple2;
  41
  42 /**
  43  * @author <a href="mailto:piotr.jaszczyk@nokia.com">Piotr Jaszczyk</a>
  44  */
  45 public class DummyCollector {
  46     private Optional<SslContext> sslContext;
  47
  48     private final List<ByteBuf> receivedData = Collections.synchronizedList(new ArrayList<>());
  49     private DisposableServer server;
  50     private ReplayProcessor<ClientDisconnected> clientDisconnected = ReplayProcessor.create();
  51     private Flux<Integer> handledClientsCount = Flux.fromStream(IntStream.iterate(0, x -> x + 1).boxed())
  52             .zipWith(clientDisconnected)
  53             .map(Tuple2::getT1)
  54             .share();
  55
  56     DummyCollector(Optional<SslContext> sslContext) {
  57         this.sslContext = sslContext;
  58     }
  59
  60     public InetSocketAddress start() {
  61         TcpServer tcpServer =
  62                 sslContext.map(context -> TcpServer.create()
  63                         .secure(ssl -> ssl.sslContext(context)))
  64                         .orElseGet(TcpServer::create)
  65                         .host("localhost")
  66                         .port(6666)
  67                         .wiretap(true)
  68                         .handle(this::handleConnection);
  69         server = tcpServer.bindNow();
  70         return server.address();
  71     }
  72
  73     public void stop() {
  74         server.disposeNow();
  75         server = null;
  76     }
  77
  78     public void blockUntilFirstClientIsHandled(Duration timeout) {
  79         handledClientsCount.blockFirst(timeout);
  80     }
  81
  82     public void blockUntilFirstClientsAreHandled(int numClients, Duration timeout) {
  83         handledClientsCount.take(numClients).blockLast(timeout);
  84     }
  85
  86     public ByteBuf dataFromClient(int clientNumber) {
  87         return receivedData.get(clientNumber);
  88     }
  89
  90     public ByteBuf dataFromFirstClient() {
  91         return dataFromClient(0);
  92     }
  93
  94     private Publisher<Void> handleConnection(NettyInbound nettyInbound, NettyOutbound nettyOutbound) {
  95         nettyInbound.receive()
  96                 .aggregate()
  97                 .retain()
  98                 .log()
  99                 .doOnNext(this::collect)
 100                 .subscribe();
 101
 102         return nettyOutbound.neverComplete();
 103     }
 104
 105     private void collect(ByteBuf buf) {
 106         receivedData.add(buf);
 107         clientDisconnected.onNext(ClientDisconnected.INSTANCE);
 108     }
 109
 110
 111     private static final class ClientDisconnected {
 112
 113         private static final ClientDisconnected INSTANCE = new ClientDisconnected();
 114     }
 115 }