apivovarov

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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

apivovarov

import scala.util.{Failure, Success, Try}

val f1: (Int) => Try[String] = x => Try(s"f1($x)")
val f2: (String) => Try[String] = y => Try(s"f2($y)")
val f3: (String) => Try[String] = z => Try(s"f3($z)")

val x = 10
val res: Try[String] = f1(x).flatMap(y => f2(y).flatMap(z => f3(z)))
println(res)
// Success(f3(f2(f1(10))))

apivovarov

package org.apache.hadoop.mapreduce.lib.output;

import java.io.IOException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapreduce.JobContext;
import org.apache.hadoop.mapreduce.TaskAttemptContext;

apivovarov

package org.apache.hadoop.mapred;

import java.io.IOException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapred.FileOutputCommitter;
import org.apache.hadoop.mapred.FileOutputFormat;

apivovarov

package org.apache.hadoop.mapred;

import java.io.IOException;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.mapred.JobContext;
import org.apache.hadoop.mapred.JobStatus;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.OutputCommitter;

apivovarov

/**
  * Monad to work with AutoClosables
  * Automatic Resource Management
  * 
  * Example:
  * val lines = Arm(new FileInputStream("/my.txt")).map { stream =>
  *   Source.fromInputStream(stream)("UTF-8").getLines
  * }
  * 
  */

apivovarov

package org.x4444.onakka

import java.io.InputStream
import java.util.concurrent._

/**
  * RunAll
  */
object RunAll {

apivovarov

import scala.collection._
import scala.collection.immutable.HashMap

def time(times: Int)(fn: => Unit)(name: String): Unit = {
  val t1 = System.currentTimeMillis()
  var i = 0
  while (i < times) {
    fn
    i += 1
  }

apivovarov

package aaa;

import java.util.HashMap;

/**
 * Use -Xmx30G -Xms30G for 100,000,000 rows
 */
public class MapUpdater {

    public static void main(String[] args) throws InterruptedException {

apivovarov

package aaa;

import java.util.HashMap;

/**
 * Use -Xmx30G -Xms30G for 100,000,000 rows
 */
public class MapUpdater2 {

    public static void main(String[] args) throws InterruptedException {