flowkater

The Composable Architecture

The Composable Architecture(TCA)는 일관되고 이해할 수 있는 방식으로 어플리케이션을 만들기 위해 탄생한 라이브러리입니다. 합성(Composition), 테스팅(Testing) 그리고 인체 공학(Ergonomics)을 염두에 둔 TCA는 SwiftUI, UIKit을 지원하며 모든 애플 플랫폼(iOS, macOS, tvOS, watchOS)에서 사용 가능합니다.

• The Composable Architecture
  • The Composable Architecture란
  • 강의 영상
  • 예제 코드
  • 기본적인 사용법
• 테스팅

flowkater

This gist describes how to create a Kafka cluster on Kubernetes with minimal effort.

Dislike to incubator/kafka helm chart, this approach uses wurstmeister/kafka Docker image or its GraalVM equivalent, dongjinleekr/kafka.

Note: This configuration is intended for dev or testing purpose; it may be used in production environment, but I can't give any guarantees in that respect.

Prerequisites

Install Zookeeper with the following helm command:

flowkater

workflow "Demo workflow" {
  on = "push"
  resolves = ["SNS Notification"]
}

action "Build Image" {
  uses = "actions/docker/cli@c08a5fc9e0286844156fefff2c141072048141f6"
  runs = ["/bin/sh", "-c", "docker build -t $IMAGE_URI ."]
  env = {
    IMAGE_URI = "xxxxxxxx.dkr.ecr.ap-northeast-1.amazonaws.com/github-action-demo:latest"

flowkater

import {call, put, take, fork} from 'redux-saga/effects'
import {END} from 'redux-saga'
import CategoryActions, {CategoryTypes} from '../Redux/CategoryRedux'

// attempts to fetch category
export function* fetchCategoryServer (api) {
  let action = yield take(CategoryTypes.CATEGORY_SERVER)
  // check when it stopped
  while (action !== END) {
    yield fork(fetchCategoryAPI, api)

flowkater

# Bulk API design
#
# resources :posts
class PostsController < ActiveController::Base
  # GET /posts/1,4,50,90
  # post_url([ @post, @post ])
  def show_many
    @posts = Post.find(params[:ids])
  end

flowkater

Massive file upload using JQueryUpload + Nginx + Rails + Sidekiq

The goal: Upload several files (virtually big files) to a Rails application without compromising the user experience.

Architecture

jQuery File Upload + Nginx + Rails (Carrierwave) + Sidekiq

1. jQuery File Upload (http://blueimp.github.io/jQuery-File-Upload/)

flowkater

• 원제 : 55 Trivia Notations you should know in Ruby
• 원문 : kyoendo
• 출처 : http://melborne.github.io/2013/03/04/ruby-trivias-you-should-know-4/
• 번역 : nacyot propellerheaven@gmail.com
• 라이센스 : cc-by-nc

알아두면 도움이 되는 55가지 루비 기법

Ruby는 즐거운 언어입니다. Ruby를 사용하다보면 매뉴얼에도 나와있지 않은 '작은 발견'을 만나게 됩니다. 이러한 '발견'은 프로그램의 질이나

flowkater

Backend Architectures

Twitter

ror, scala, jetty, erlang, thrift, mongrel, comet server, my-sql, memchached, varnish, kestrel(mq), starling, gizzard, cassandra, hadoop, vertica, munin, nagios, awstats

• Introduce Gizzard of Twitter - 트위터의 새로운 분산 관리 라이브러리 Gizzard를 소개합니다.
• The Architecture Twitter Uses to Deal with 150M Active Users, 300K QPS, a 22 MB/S Firehose, and Send Tweets in Under 5 Seconds
• Scaling Twitter: Making Twitter 10000 Percent Faster

flowkater

# download and make Redis
$ wget http://redis.googlecode.com/files/redis-2.6.7.tar.gz
$ sudo tar xzf redis-2.6.7.tar.gz -C /usr/lib/
$ cd /usr/lib/redis-2.6.7
$ sudo make

# create symlinks to the /usr/local/bin
$ sudo ln -s /usr/lib/redis-2.6.7/src/redis-server  /usr/local/bin/redis-server
$ sudo ln -s /usr/lib/redis-2.6.7/src/redis-cli  /usr/local/bin/redis-cli