Syafdia Okta – Medium

Published in Level Up Coding

·Pinned

Go concurrency pattern: Semaphore

Implementing concurrent processes in the Go programming language is very easy. Just run your function with go prefix, and boooom, your function will not blocking your main Goroutine. But, what if your awesome concurrent function have responsibility with the machine’s I/O? For example, your function will do 100 parallel HTTP…

Concurrent Programming

4 min read

Pinned

Go concurrency pattern: Pipeline

“Concurrency is about dealing with lots of things at once. Parallelism is about doing lots of things at once.” — Rob Pike Concurrency and Parallelism What is the meaning of concurrency in programming? Concurrency is the ability of a program for running multiple tasks simultaneously. And what is parallelism ? Parallelism is about…

Golang

4 min read

Published in Code Chasm

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Go Concurrency Pattern: Worker Pool

In Go programming language, we can achieve concurrency by using goroutine. Goroutine is one of the most basic units Go programming language. When we create go program, it has at least one goroutine, we called it the main goroutine, it is automatically created and started when the main process begin. …

Golang

5 min read

Nov 30, 2021

Introduction to Distributed System Design Patterns

Designing distributed system is not as straight forward as non distributed one. We should take on consideration on communication, coordination, and synchronization. There are some examples of common patterns could be applied when building distributed system. In this article, we will talk about 3 of those patterns. Quorum Quorum is the…

Distributed Systems

5 min read

Introduction to Distributed System Design Patterns

Published in Code Chasm

·Aug 18, 2021

Setup Unit Test in Go using Table Driven Test in Clean Architecture

“Tests are stories we tell the next generation of programmers on a project.” — Roy Osherove, The Art of Unit Testing As you may know, an application contains a small number of components, which could be a struct, function, or class. These components are referred to as unit components, and…

9 min read

Setup Unit Test in Go using Table Driven Test in Clean Architecture

Published in Geek Culture

·Jul 26, 2021

Introduction to Redis common patterns

Redis (Remote Dictionary Server) is a in memory data store which can we used as a database, cache, and message broker. The most apparent use cases for Redis is as cache store on the server side. …

Redis

6 min read

Published in Level Up Coding

·Jun 2, 2021

Implementing Redlock on Redis for distributed locks

In a multithreaded programming environment, we use locks to limit access to shared resources. An example of a lock is a mutex, its name stands for mutual exclusion. …

Distributed Systems

4 min read

Implementing Redlock on Redis for distributed locks

Published in Level Up Coding

·Mar 28, 2021

Kong custom plugin development using Go

Since version 2.0, Kong announced Go as one of the supported languages to be used on Kong API Gateway plugins development besides Lua. Kong releases the Plugin Development Kit (PDK) for Go users on their official repository. In this article, we’ll try to develop and deploy custom plugins for Kong…

Kong

6 min read

Feb 2, 2019

Implementasi SMS Retriever API di Android

One Time Password (OTP) via SMS dapat mempermudah pengguna aplikasi dalam proses autentikasi. Secara garis besar, proses nya dapat dilihat dalam gambar berikut:

Android

2 min read

Dec 21, 2017

Mengenal arsitektur Model View ViewModel (MVVM) di Android — Bagian 1

Model View ViewModel (MVVM) merupakan salah satu architectural pattern yang dipakai dalam pengembangan perangkat lunak berbasis Graphical User Interface (GUI), arsitektur ini memisahkan business logic dengan GUI. Pada Android SDK sendiri, telah tersedia library Data Binding dari API level 7+. Beberapa layer pada arsitektur MVVM : Model Model / entity…

Kotlin

3 min read

Mengenal arsitektur Model View ViewModel (MVVM) di Android — Bagian 1