juplo.de Git - demos/kafka/chat/blob - src/test/java/de/juplo/kafka/chat/backend/AbstractHandoverIT.java

   1 package de.juplo.kafka.chat.backend;
   2
   3 import de.juplo.kafka.chat.backend.api.ChatRoomInfoTo;
   4 import lombok.extern.slf4j.Slf4j;
   5 import org.junit.jupiter.api.BeforeEach;
   6 import org.junit.jupiter.api.Test;
   7 import org.springframework.core.ParameterizedTypeReference;
   8 import org.springframework.http.HttpStatus;
   9 import org.springframework.http.MediaType;
  10 import org.springframework.http.codec.ServerSentEvent;
  11 import org.springframework.web.reactive.function.client.WebClient;
  12 import org.testcontainers.junit.jupiter.Testcontainers;
  13 import reactor.core.publisher.Flux;
  14 import reactor.core.publisher.Mono;
  15
  16 import java.util.Arrays;
  17 import java.util.concurrent.ExecutorService;
  18 import java.util.concurrent.Executors;
  19
  20
  21 @Testcontainers
  22 @Slf4j
  23 public abstract class AbstractHandoverIT
  24 {
  25   static final ParameterizedTypeReference<ServerSentEvent<String>> SSE_TYPE = new ParameterizedTypeReference<>() {};
  26   static final int NUM_CHATROOMS = 23;
  27   static final int NUM_CLIENTS = 17;
  28
  29
  30   private final AbstractHandoverITContainers containers;
  31   private final ExecutorService executorService = Executors.newFixedThreadPool(NUM_CLIENTS);
  32
  33
  34   AbstractHandoverIT(AbstractHandoverITContainers containers)
  35   {
  36     this.containers = containers;
  37   }
  38
  39
  40   @Test
  41   void test() throws InterruptedException
  42   {
  43     ChatRoomInfoTo[] chatRooms = Flux
  44         .range(0, NUM_CHATROOMS)
  45         .flatMap(i -> createChatRoom("room-" + i))
  46         .toStream()
  47         .toArray(size -> new ChatRoomInfoTo[size]);
  48
  49     int port = containers.haproxy.getMappedPort(8400);
  50
  51     TestWriter[] testWriters = Flux
  52         .range(0, NUM_CLIENTS)
  53         .map(i -> new TestWriter(
  54             port,
  55             chatRooms[i % NUM_CHATROOMS],
  56             "user-" + Integer.toString(i)))
  57         .doOnNext(testClient -> executorService.execute(testClient))
  58         .toStream()
  59         .toArray(size -> new TestWriter[size]);
  60
  61     Thread.sleep(10000);
  62     Arrays
  63         .stream(testWriters)
  64         .forEach(testClient -> testClient.running = false);
  65
  66     Flux
  67         .fromArray(chatRooms)
  68         .flatMap(chatRoom ->receiveMessages(chatRoom).take(100))
  69         .doOnNext(message -> log.info("message: {}", message))
  70         .then()
  71         .block();
  72   }
  73
  74   Mono<ChatRoomInfoTo> createChatRoom(String name)
  75   {
  76     return webClient
  77         .post()
  78         .uri("/create")
  79         .contentType(MediaType.TEXT_PLAIN)
  80         .bodyValue(name)
  81         .accept(MediaType.APPLICATION_JSON)
  82         .exchangeToMono(response ->
  83         {
  84           if (response.statusCode().equals(HttpStatus.OK))
  85           {
  86             return response.bodyToMono(ChatRoomInfoTo.class);
  87           }
  88           else
  89           {
  90             return response.createError();
  91           }
  92         });
  93   }
  94
  95   Flux<ServerSentEvent<String>> receiveMessages(ChatRoomInfoTo chatRoom)
  96   {
  97     return webClient
  98         .get()
  99         .uri(
 100             "/{chatRoomId}/listen",
 101             chatRoom.getId())
 102         .accept(MediaType.TEXT_EVENT_STREAM)
 103         .retrieve()
 104         .bodyToFlux(SSE_TYPE);
 105   }
 106
 107
 108   WebClient webClient;
 109
 110   @BeforeEach
 111   void setUp() throws Exception
 112   {
 113     containers.setUp();
 114
 115     Integer port = containers.haproxy.getMappedPort(8400);
 116     webClient = WebClient.create("http://localhost:" + port);
 117   }
 118 }