Vertx Scala：如何设置websocket连接并发送消息

我正在使用Vert.x Scala库（3.8.0版），我不知道如何设置websocket连接和发送消息。对于Vert.x 3.5.4，应遵循以下步骤：

import io.vertx.scala.core.Vertx
import io.vertx.scala.core.http.HttpClientOptions

object WsClient extends App {
  val vertx = Vertx.vertx
  val client = vertx.createHttpClient

  client.websocket(8080, "localhost", "/api", (ws: io.vertx.scala.core.http.WebSocket) => {
    println("connected")
    val message = "hello"
    ws.writeTextMessage(message)
  })
}

但是，在编译时会引发以下错误：

Error:(9, 10) overloaded method value websocket with alternatives:
  (requestURI: String,headers: io.vertx.scala.core.MultiMap,version: io.vertx.core.http.WebsocketVersion,wsConnect: io.vertx.core.Handler[io.vertx.scala.core.http.WebSocket])io.vertx.scala.core.http.HttpClient <and>
  (requestURI: String,headers: io.vertx.scala.core.MultiMap,wsConnect: io.vertx.core.Handler[io.vertx.scala.core.http.WebSocket],failureHandler: io.vertx.core.Handler[Throwable])io.vertx.scala.core.http.HttpClient <and>
  (options: io.vertx.scala.core.http.RequestOptions,headers: io.vertx.scala.core.MultiMap,version: io.vertx.core.http.WebsocketVersion,wsConnect: io.vertx.core.Handler[io.vertx.scala.core.http.WebSocket])io.vertx.scala.core.http.HttpClient <and>
  (host: String,requestURI: String,headers: io.vertx.scala.core.MultiMap,wsConnect: io.vertx.core.Handler[io.vertx.scala.core.http.WebSocket])io.vertx.scala.core.http.HttpClient <and>
  (options: io.vertx.scala.core.http.RequestOptions,headers: io.vertx.scala.core.MultiMap,wsConnect: io.vertx.core.Handler[io.vertx.scala.core.http.WebSocket],failureHandler: io.vertx.core.Handler[Throwable])io.vertx.scala.core.http.HttpClient <and>
  (host: String,requestURI: String,wsConnect: io.vertx.core.Handler[io.vertx.scala.core.http.WebSocket],failureHandler: io.vertx.core.Handler[Throwable])io.vertx.scala.core.http.HttpClient <and>
  (port: Int,host: String,requestURI: String,wsConnect: io.vertx.core.Handler[io.vertx.scala.core.http.WebSocket])io.vertx.scala.core.http.HttpClient
 cannot be applied to (Int, String, String, io.vertx.scala.core.http.WebSocket => io.vertx.scala.core.http.WebSocket)
  client.websocket(8080, "localhost", "/api", (ws: io.vertx.scala.core.http.WebSocket) => {

错误：（9，10）重载了方法值websocket和可选项：
（requestURI:String，头：io.vertx.scala.core.MultiMap，版本：io.vertx.core.http.WebsocketVersion，wsConnect:io.vertx.core.Handler[io.vertx.scala.core.http.WebSocket]）io.vertx.scala.core.http.HttpClient
（requestURI:String，headers:io.vertx.scala.core.MultiMap，wsConnect:io.vertx.core.Handler[io.vertx.scala.core.http.WebSocket]，failureHandler:io.vertx.core.Handler[Throwable]）io.vertx.scala.core.http.HttpClient
（选项：io.vertx.scala.core.http.RequestOptions，标题：io.vertx.scala.core.MultiMap，版本：io.vertx.core.http.WebsocketVersion，wsConnect:io.vertx.core.Handler[io.vertx.scala.core.http.WebSocket]）io.vertx.scala.core.http.HttpClient
（主机：String，requestURI:String，头：io.vertx.scala.core.MultiMap，wsConnect:io.vertx.core.Handler[io.vertx.scala.core.http.WebSocket]）io.vertx.scala.core.http.HttpClient
（选项：io.vertx.scala.core.http.RequestOptions，标题：io.vertx.scala.core.MultiMap，wsConnect:io.vertx.core.Handler[io.vertx.scala.core.http.WebSocket]，failureHandler:io.vertx.core.Handler[Throwable]）io.vertx.scala.core.http.HttpClient
（主机：String，requestURI:String，wsConnect:io.vertx.core.Handler[io.vertx.scala.core.http.WebSocket]，failureHandler:io.vertx.core.Handler[Throwable]）io.vertx.scala.core.http.HttpClient
（port:Int，host:String，requestURI:String，wsConnect:io.vertx.core.Handler[io.vertx.scala.core.http.WebSocket]）io.vertx.scala.core.http.HttpClient
无法应用于（Int、String、String、io.vertx.scala.core.http.WebSocket=>io.vertx.scala.core.http.WebSocket）
websocket（8080，“localhost”，“/api”，（ws:io.vertx.scala.core.http.websocket）=>{

---

我还试图让语言推断处理程序类型，但没有成功。我做错了什么？

查看java文档，我注意到API发生了变化，方法

client.websocket（…）

已被弃用，应该使用的方法是

client.websocket（…）

下面是上述代码的更正版本，它应该在Vert.x 3.6.x版本中工作：

import io.vertx.core.AsyncResult
import io.vertx.scala.core.http.WebSocket

client.webSocket(8080, "localhost", "/api", (res: AsyncResult[WebSocket]) => {
  if (res.succeeded) {
    println("connected")
    val ws = res.result()
    val message = "hello"
    ws.writeTextMessage(message)
  } else {
    println(res.cause)
  }
})

---

查看java文档时，我注意到API发生了变化，方法

client.websocket（…）

已被弃用，应该使用的方法是

client.websocket（…）

下面是上述代码的更正版本，它应该在Vert.x 3.6.x版本中工作：

import io.vertx.core.AsyncResult
import io.vertx.scala.core.http.WebSocket

client.webSocket(8080, "localhost", "/api", (res: AsyncResult[WebSocket]) => {
  if (res.succeeded) {
    println("connected")
    val ws = res.result()
    val message = "hello"
    ws.writeTextMessage(message)
  } else {
    println(res.cause)
  }
})