appkr

// CQS (Command-Query Separation)
// Bertrand Meyer devised the CQS principle
// It states that every method should either be a command that performs an action, or a 
// query that returns data to the caller, but not both. In other words, asking a question 
// should not change the answer. More formally, methods should return a value only if they 
// are referentially transparent and hence possess no side effects.
//
// Example: 

public class CustomerService

appkr

If you have two days to learn the very basics of modelling, Domain-Driven Design, CQRS and Event Sourcing, here's what you should do:

In the evenings read the [Domain-Driven Design Quickly Minibook]{http://www.infoq.com/minibooks/domain-driven-design-quickly}. During the day watch following great videos (in this order):

1. Eric Evans' [What I've learned about DDD since the book]{http://www.infoq.com/presentations/ddd-eric-evans}
2. Eric Evans' [Strategic Design - Responsibility Traps]{http://www.infoq.com/presentations/design-strategic-eric-evans}
3. Udi Dahan's [Avoid a Failed SOA: Business & Autonomous Components to the Rescue]{http://www.infoq.com/presentations/SOA-Business-Autonomous-Components}
4. Udi Dahan's [Command-Query Responsibility Segregation]{http://www.infoq.com/presentations/Command-Query-Responsibility-Segregation}
5. Greg Young's [Unshackle Your Domain]{http://www.infoq.com/presentations/greg-young-unshackle-qcon08}
6. Eric Evans' [Acknowledging CAP at the Root -- in the Domain Model]{ht

appkr

-- 테스트 테이블 생성
CREATE TABLE messages (
    id INT AUTO_INCREMENT PRIMARY KEY,
    message VARCHAR(140)
) ENGINE=INNODB;

SHOW TABLE STATUS WHERE NAME = "messages";

appkr

files:
  /opt/elasticbeanstalk/hooks/appdeploy/pre/03_install_php_modules.sh:
    mode: "000755"
    owner: root
    group: root
    content: |
      #!/usr/bin/env bash

      set -xe

appkr

#!/bin/sh
# option 2: paste this into user-data to automate install via boot script
# NOTE: update --label=owner=YOURNAME below if you want to easily identify yours

# renames the host to have a suffix of alexellisio
export original=$(cat /etc/hostname)
sudo hostname $original-master-alexellisio
echo $original-master-alexellisio | sudo tee /etc/hostname

apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D

appkr

# ------------------------------------------------------------------------------
# Dockerfile for a static website
# ------------------------------------------------------------------------------

FROM nginx:alpine

# ------------------------------------------------------------------------------
# Add source to the docker image
# ------------------------------------------------------------------------------

appkr

generate(:scaffold, "post", "title:string", "body:text")

file 'config/database.yml', <<-CODE
default: &default
  adapter: mysql2
  encoding: utf8
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  host: db
  username: <%= ENV.fetch('MYSQL_USER') %>
  password: <%= ENV.fetch('MYSQL_PASSWORD') %>

appkr

ab -p "$(PWD)/delivery.json" \
    -T "application/json" \
    -H "Accept: application/json" \
    -H "Authorization: bearer header.payload.signature" \
    -c 10 -n 100 -v -r -l \
    http://127.0.0.1/mpos/v1/stores/10/deliveries

appkr

<?php
class Facade{
    private static $service = null;
    public static function getKey(){
        return 'world';
    }
    public static function __callstatic($method,$args){
        if(!isset(self::$service)){
            self::$service = ServiceLocator::getInstance()->getService(self::getKey());
        }

appkr

<?php
interface HandleIterator {
    public function getNextHandle();
    public function dataCallback($data);
}
class IndexHandleIterator implements HandleIterator{
    private $curl;
    private $count;
    public function __construct(){
        $this->curl = curl_init("http://localhost/index.php");