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直接上代碼吧
說(shuō)下測(cè)試思路:
該代碼監(jiān)控的/tmp/sparkStream/目錄;
首先,創(chuàng)建該目錄mkdir -p /tmp/sparkStream;
然后,運(yùn)行spark程序;
最后,向監(jiān)控目錄/tmp/sparkStream/添加數(shù)據(jù)文件;
觀察spark程序運(yùn)行效果。
sparkStreaming import org.apache.log4j.{LoggerLevel} import org.apache.spark.SparkConf import org.apache.spark.streaming.{SecondsStreamingContext} import org.apache.spark.streaming.StreamingContext._ object HdfsWordCount { def main(args: Array[]){ Logger.getLogger("org.apache.spark").setLevel(Level.WARN) Logger.getLogger("org.apache.eclipse.jetty.server").setLevel(Level.OFF) sparkConf = SparkConf().setAppName().setMaster() ssc = StreamingContext(sparkConf()) lines = ssc.textFileStream() words = lines.flatMap(_.split()) wordCounts = words.map(x=>(x)).reduceByKey(_+_) wordCounts.print() ssc.start() ssc.awaitTermination() } }
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