scala - Spark Scala 流式 CSV

Question

我是 Spark/Scala 的新手。我知道如何加载 CSV 文件:

    sqlContext.read.format("csv")

以及如何读取文本流和文件流:

    scc.textFileStream("""file:///c:\path\filename""");
    scc.fileStream[LongWritable, Text, TextInputFormat](...)

但如何阅读文本 CSV 格式的流 格式？谢谢，列维

Answer 1

干得好:

val ssc = new StreamingContext(sparkConf, Seconds(5))


    // Create the FileInputDStream on the directory
    val lines = ssc.textFileStream("file:///C:/foo/bar")

    lines.foreachRDD(rdd => {
        if (!rdd.isEmpty()) {
          println("RDD row count: " + rdd.count())
         // Now you can convert this RDD to DataFrame/DataSet and perform business logic.  

        }
      }
    })

    ssc.start()
    ssc.awaitTermination()
  }