Spark中怎么读取本地日志文件
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1.代码如下
import java.io.{FileWriter, BufferedWriter, File} import com.alvinalexander.accesslogparser.{AccessLogRecord, AccessLogParser} import org.apache.spark.{SparkContext, SparkConf} import scala.collection.immutable.ListMap /** * Spark 读取本地日志文件,抽取最高的访问地址,排序,并保存到本地文件 * Created by eric on 16/6/29. */ object LogAnalysisSparkFile { def getStatusCode(line: Option[AccessLogRecord]) = { line match { case Some(l) => l.httpStatusCode case None => "0" } } def main(agrs: Array[String]): Unit = { //设置本地运行,在Vm options:上填写:-Dspark.master=local ,Program arguments上填写:local val sparkConf = new SparkConf().setMaster("local[1]").setAppName("StreamingTest") val sc = new SparkContext(sparkConf) val p = new AccessLogParser val log = sc.textFile("/var/log/nginx/www.eric.aysaas.com-access.log") println(log.count())//68591 val log1 = log.filter(line => getStatusCode(p.parseRecord(line)) == "404").count() println(log1) val nullObject = AccessLogRecord("", "", "", "", "GET /foo HTTP/1.1", "", "", "", "") val recs = log.filter(p.parseRecord(_).getOrElse(nullObject).httpStatusCode == "404") .map(p.parseRecord(_).getOrElse(nullObject).request) val wordCounts = log.flatMap(line => line.split(" ")) .map(word => (word, 1)) .reduceByKey((a, b) => a + b) val uriCounts = log.map(p.parseRecord(_).getOrElse(nullObject).request) .map(_.split(" ")(1)) .map(uri => (uri, 1)) .reduceByKey((a, b) => a + b) val uriToCount = uriCounts.collect // (/foo, 3), (/bar, 10), (/baz, 1) ...//无序 val uriHitCount = ListMap(uriToCount.toSeq.sortWith(_._2 > _._2):_*) // (/bar, 10), (/foo, 3), (/baz, 1),降序 uriCounts.take(10).foreach(println) println("**************************") val logSave = uriHitCount.take(10).foreach(println) // this is a decent way to print some sample data uriCounts.takeSample(false, 100, 1000) //输出保存到本地文件,由于ListMap,导致 saveAsTextFile 不能用 // logSave.saveAsTextFile("UriHitCount") val file = new File("UriHitCount.out") val bw = new BufferedWriter(new FileWriter(file)) for { record <- uriHitCount val uri = record._1 val count = record._2 } bw.write(s"$count => $uri\n") bw.close } }
2.结果图如下
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