Java Code Examples for io.vertx.servicediscovery.types.EventBusService#getProxy()

private void authUaaHandler(RoutingContext context) {
  if (context.user() != null) {
    JsonObject principal = context.user().principal();
    String username = null;  // TODO: Only for demo. Complete this in next version.
    // String username = KeycloakHelper.preferredUsername(principal);
    if (username == null) {
      context.response()
        .putHeader("content-type", "application/json")
        .end(new Account().setId("TEST666").setUsername("Eric").toString()); // TODO: no username should be an error
    } else {
      Future<AccountService> future = Future.future();
      EventBusService.getProxy(discovery, AccountService.class, future.completer());
      future.compose(accountService -> {
        Future<Account> accountFuture = Future.future();
        accountService.retrieveByUsername(username, accountFuture.completer());
        return accountFuture.map(a -> {
          ServiceDiscovery.releaseServiceObject(discovery, accountService);
          return a;
        });
      })
        .setHandler(resultHandlerNonEmpty(context)); // if user does not exist, should return 404
    }
  } else {
    context.fail(401);
  }
}
 

@Override
public void start(Future<Void> future) {
    super.start();

    // Get configuration
    config = ConfigFactory.load();

    String company = TraderUtils.pickACompany();
    int numberOfShares = TraderUtils.pickANumber();

    EventBus eventBus = vertx.eventBus();
    EventBusService.getProxy(discovery, PortfolioService.class, ar -> {
        if (ar.failed()) {
            System.out.println("Portfolio service could not be retrieved: " + ar.cause());
        } else {
            // Our services:
            PortfolioService portfolio = ar.result();
            MessageConsumer<JsonObject> marketConsumer = eventBus.consumer(config.getString("market.address"));

            // Listen to the market...
            marketConsumer.handler(message -> {
                JsonObject quote = message.body();
                TraderUtils.dumbTradingLogic(company, numberOfShares, portfolio, quote);
            });
        }
    });
}
 

public void example3(ServiceDiscovery discovery) {
  EventBusService.getProxy(discovery, MyService.class, ar -> {
    if (ar.succeeded()) {
      MyService service = ar.result();

      // Dont' forget to release the service
      ServiceDiscovery.releaseServiceObject(discovery, service);
    }
  });
}
 

public void example3(ServiceDiscovery discovery) {
  EventBusService.getProxy(discovery, MyService.class, ar -> {
    if (ar.succeeded()) {
      MyService service = ar.result();

      // Dont' forget to release the service
      ServiceDiscovery.releaseServiceObject(discovery, service);
    }
  });
}
 

/**
 * Fetch global counter of order from the cache infrastructure.
 *
 * @param key counter key (type)
 * @return async result of the counter
 */
private Future<Long> retrieveCounter(String key) {
  Future<Long> future = Future.future();
  EventBusService.getProxy(discovery, CounterService.class,
    ar -> {
      if (ar.succeeded()) {
        CounterService service = ar.result();
        service.addThenRetrieve(key, future.completer());
      } else {
        future.fail(ar.cause());
      }
    });
  return future;
}
 

private Future<ShoppingCart> getCurrentCart(String userId) {
  Future<ShoppingCartService> future = Future.future();
  EventBusService.getProxy(discovery, ShoppingCartService.class, future.completer());
  return future.compose(service -> {
    Future<ShoppingCart> cartFuture = Future.future();
    service.getShoppingCart(userId, cartFuture.completer());
    return cartFuture.compose(c -> {
      if (c == null || c.isEmpty())
        return Future.failedFuture(new IllegalStateException("Invalid shopping cart"));
      else
        return Future.succeededFuture(c);
    });
  });
}
 

/**
 * Save checkout cart event for current user.
 *
 * @param userId user id
 * @return async result
 */
private Future<Void> saveCheckoutEvent(String userId) {
  Future<ShoppingCartService> future = Future.future();
  EventBusService.getProxy(discovery, ShoppingCartService.class, future.completer());
  return future.compose(service -> {
    Future<Void> resFuture = Future.future();
    CartEvent event = CartEvent.createCheckoutEvent(userId);
    service.addCartEvent(event, resFuture.completer());
    return resFuture;
  });
}
 

@Override
public void start(Future<Void> future) {
  super.start();

  //----
  // Initialize the trader
  String company = TraderUtils.pickACompany();
  int numberOfShares = TraderUtils.pickANumber();
  System.out.println("Java compulsive trader configured for company " + company + " and shares: " + numberOfShares);

  // We need to retrieve two services, create two futures object that will get the services
  Future<MessageConsumer<JsonObject>> marketFuture = Future.future();
  Future<PortfolioService> portfolioFuture = Future.future();
  // Retrieve the services, use the "special" completed to assign the future
  MessageSource.getConsumer(discovery, new JsonObject().put("name", "market-data"), marketFuture);
  EventBusService.getProxy(discovery, PortfolioService.class, portfolioFuture);

  // When done (both services retrieved), execute the handler
  CompositeFuture.all(marketFuture, portfolioFuture).setHandler(ar -> {
    if (ar.failed()) {
      future.fail("One of the required service cannot " +
          "be retrieved: " + ar.cause());
    } else {
      // Our services:
      PortfolioService portfolio = portfolioFuture.result();
      MessageConsumer<JsonObject> marketConsumer = marketFuture.result();

      // Listen the market...
      marketConsumer.handler(message -> {
        JsonObject quote = message.body();
        TraderUtils.dumbTradingLogic(company, numberOfShares, portfolio, quote);
      });

      future.complete();
    }
  });
  // ----
}
 

/**
 * Get product service from the service discovery infrastructure.
 *
 * @return async result of the service.
 */
private Future<ProductService> getProductService() {
  Future<ProductService> future = Future.future();
  EventBusService.getProxy(discovery, ProductService.class, future.completer());
  return future;
}