第 3 章 Eclipse Vert.x 4 中的变化

WebClient client = WebClient.create(vertx);
HttpRequest request = client.get("/resource");

request.send(ar -> {
  if (ar.succeeded()) {
    HttpResponse response = ar.result();
  } else {
    Throwable error = ar.cause();
  }
});

WebClient client = WebClient.create(vertx);
HttpRequest request = client.get("/resource");

Future<HttpResponse> response = request.send();

response.onComplete(ar -> {
  if (ar.succeeded()) {
    HttpResponse response = ar.result();
  } else {
    Throwable failure = ar.cause();
  }
});

client.get("/resource1").send(ar1 -> {
  if (ar1.succeeded()) {
    HttpResponse response = ar.result();
    JsonObject json = response.body();
    client.put("/resource2").sendJsonObject(ar2 -> {
      if (ar2.succeeded()) {
        // Handle final result
      } else {
        Throwable failure2 = ar.cause();
      }
    });
  } else {
    Throwable failure1 = ar.cause();
  }
});

Future<HttpResponse> fut1 = client.get("/resource1").send();

Future<HttpResponse> fut2 = fut1.compose(response -> client.put("/resource2").sendJsonObject(response.body()));

fut2.onComplete(ar -> {
  if (ar.succeeded()) {
    // Handle final result
  } else {
    Throwable failure = ar.cause();
  }
});