cspinetta

package main

import (
	"fmt"
	"io"
)

func main() {
	r := NewDataGenerator(1000)

cspinetta

Object locking implementation in the Java HotSpot VM

The most synchronization idiom in Java is using the synchronized keyword.

The JVM supports synchronization of both methods and sequences of instructions within a method using a single synchronization construct - synchronized - which is built around an internal entity known as the intrinsic lock or monitor lock (The API specification often refers to this entity simply as a "monitor"). Intrinsic locks play a role in both aspects of synchronization: enforcing exclusive access to an object's state and establishing happens-before relationships to ensure a correct visibility amoung threads.

At bytecode level, the JVM supplies the monitorenter and monitorexit instructions to support such constructs.

At runtime level, in the Java HotSpot VM, every object has a built-in monitor (the so called intrinsic lock or monitor lock) that can be acquired by any thread.

cspinetta

version: "3.6"

services:
  promtail:
    image: grafana/promtail:1.4.0
    container_name: promtail
    command: [ "-config.file=/etc/promtail/local-config.yaml" ]
    volumes:
      - './promtail.yml:/etc/promtail/local-config.yaml:ro'
      - '__path_to_logs_directory__:/app/log:ro'

cspinetta

#!/usr/bin/env bash

cat /proc/net/tcp* | awk '
{
	TOTAL += $7;
	COUNT++;
}
END {
	printf "rate_retr %.3f\n", TOTAL/COUNT
}

cspinetta

version: '3.4'
services:
  external-api:
    image: cspinetta/workshop-external-api:0.1
    network_mode: "host"
#    ports:
#      - "9290:9290"
  internal-api:
    image: cspinetta/workshop-internal-api:0.1
    network_mode: "host"

cspinetta

#!/usr/bin/env python3
import os
import re
import sys

import subprocess
import curses
import traceback
import argparse
from curses import wrapper

cspinetta

package base.serializer

import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility
import com.fasterxml.jackson.annotation.{JsonInclude, PropertyAccessor}
import com.fasterxml.jackson.databind._
import com.fasterxml.jackson.datatype.jdk8.Jdk8Module
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule
import com.fasterxml.jackson.module.scala.DefaultScalaModule
import com.fasterxml.jackson.module.scala.experimental.ScalaObjectMapper
import play.api.libs.json.{JsValue, Json}

cspinetta

* Implementar `MyOptional`
* Implementar `StudentsAnalyzer`

cspinetta

Instalar IntellijIDEA:

• Extraer ideaIU-2018.2.6.tar.gz en alguna carpeta.
• Por consola ejecutar ./idea-IU-182.5107.16/bin/idea.sh.
• Al momento de poner la licencia, seleccionar registración offline y pegar el código que está en Licencia IDEA hasta 2019-03-29.txt.
• Una vez abierto, seleccionar Configure -> Create Desktop Entry.
• Cerrar y abrirlo como un programa más de Ubuntu.

Instalar JDK 8 Oracle:

cspinetta

import pureconfig.{ConfigReader, ConvertHelpers}

import scala.concurrent.duration.TimeUnit

trait ConfigReaders {
  import ConvertHelpers._

  implicit val dayOfWeekReader: ConfigReader[TimeUnit] =
    ConfigReader.fromString[TimeUnit](catchReadError(s => TimeUnitConverter.timeUnit(s)))
}