Scala 如何从齐柏林飞艇加载Flink流媒体数据

我开始在齐柏林飞艇上使用Flink，并尝试运行流媒体中最简单的程序：wordcount。 当我使用终端在本地模式下运行此代码时，它可以工作

我是这样做的：

代码如下：

object SocketWindowWordCount {

  /** Main program method */
  def main(args: Array[String]) : Unit = {

    // the host and the port to connect to
    var hostname: String = "localhost"
    var port: Int = 0

    try {
      val params = ParameterTool.fromArgs(args)
      hostname = if (params.has("hostname")) params.get("hostname") else "localhost"va
      port = params.getInt("port")
    } catch {
      case e: Exception => {
        System.err.println("No port specified. Please run 'SocketWindowWordCount " +
          "--hostname <hostname> --port <port>', where hostname (localhost by default) and port " +
          "is the address of the text server")
        System.err.println("To start a simple text server, run 'netcat -l <port>' " +
          "and type the input text into the command line")
        return
      }
    }

    // get the execution environment
    val env: StreamExecutionEnvironment = StreamExecutionEnvironment.getExecutionEnvironment

    // get input data by connecting to the socket
    val text = env.socketTextStream(hostname, port, '\n')

    // parse the data, group it, window it, and aggregate the counts 
    val windowCounts = text
          .flatMap { w => w.split("\\s") }
          .map { w => WordWithCount(w, 1) }
          .keyBy("word")
          .timeWindow(Time.seconds(5))
          .sum("count")

    // print the results with a single thread, rather than in parallel
    windowCounts.print().setParallelism(1)

    env.execute("Socket Window WordCount")
  }

  /** Data type for words with count */
  case class WordWithCount(word: String, count: Long)
}

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提前感谢您的帮助！：）

在终端中，您可以使用

nc -lk 9999

建立一个绑定到9999端口的服务，该服务将向其客户端发送它在stdin上接收到的任何内容

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可能也会有帮助。

您好，我不是flink用户，因此不确定如何准确使用flink流媒体，但这可能会对您有所帮助。非常感谢，文档非常有用，解决了我的问题！

nc -lk 9999