LocalFileTest.scala

/**
 * Copyright (C) 2015 Baifendian Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.spark.examples

import org.apache.spark.{SparkConf, SparkContext}

object LocalFileTest {
  def main(args: Array[String]): Unit = {
    if (args.length < 1) {
      System.err.println("Usage: <file>")
      System.exit(1)
    }

    val sparkConf = new SparkConf().setAppName("LocalFileTest")
    val ctx = new SparkContext(sparkConf)

    // 不建议采用这种方案，本地文件需要在集群上的所有节点存在，一般是比较难做到的
    val hostname = ctx.textFile(s"file://${args(0)}") // for example: "/etc/sysconfig/network"

    hostname.collect.foreach(println)

    ctx.stop()
  }
}