IDEA的使用

1，首先启动

cd /opt/modules/idea-IC-141.178.9/
bin/idea.sh 

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2，导入scala插件

3，导入spark源码

4，创建scala工程

5，导出jar包

6，示例代码

前提是
1，启动hdfs的namenode,datanode。
2，启动spark的master和slaves，本地测试无需启动。

package sparkIDEProgram
import org.apache.spark.SparkContext
import org.apache.spark.SparkConf
/**
 * Created by hadoop on 1/1/16.
 */
object SimpleApp {
  def main(args: Array[String]) {
    val logFile = "hdfs://spark.learn.com:8020/user/hadoop/spark/input/wc.input" // Should be some file on your system
    val conf = new SparkConf()
        .setAppName("Simple Application")
        .setMaster("spark://spark.learn.com:7077")//本地测试需要修改为local
    val sc = new SparkContext(conf)
    val logData = sc.textFile(logFile, 2).cache()
    val numAs = logData.filter(line => line.contains("a")).count()
    val numBs = logData.filter(line => line.contains("b")).count()
    println("Lines with a: %s, Lines with b: %s".format(numAs, numBs))
    sc.stop()
  }
}

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7，提交打包好的应用

bin/spark-submit /opt/sparkTest/sparkTest.jar

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