back-end Archives - Petamind https://petaminds.com/category/full-stack/back-end/ A.I, Data and Software Engineering Thu, 16 May 2024 02:22:13 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://petaminds.com/wp-content/uploads/2019/09/ic_launcher.png back-end Archives - Petamind https://petaminds.com/category/full-stack/back-end/ 32 32 How I build automated testing for the payment terminals https://petaminds.com/how-i-build-automated-testing-for-the-payment-terminals/ https://petaminds.com/how-i-build-automated-testing-for-the-payment-terminals/#respond Thu, 16 May 2024 00:27:17 +0000 https://petaminds.com/?p=5173 Payment terminals are devices used to process card transactions and must undergo extensive certification before being released to the market. Therefore, it is essential to test them quickly and reliably. I named the project as Mastoo (code name: MR2). The MR2 architecture To achieve this, our team are building a solution for automation testing with […]

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]]> https://petaminds.com/how-i-build-automated-testing-for-the-payment-terminals/feed/ 0 Harnessing the Power of TypeScript for Building a Simple Backend Application https://petaminds.com/harnessing-the-power-of-typescript-for-building-a-simple-backend-application/ https://petaminds.com/harnessing-the-power-of-typescript-for-building-a-simple-backend-application/#respond Mon, 21 Aug 2023 08:06:58 +0000 https://petaminds.com/?p=3979 Introduction In the realm of web development, choosing the right technology stack for your backend application can significantly impact its efficiency, maintainability, and scalability. TypeScript, a superset of JavaScript, has emerged as a robust choice for crafting backend solutions that are not only powerful but also developer-friendly. In this article, we’ll delve into the benefits […]

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]]> https://petaminds.com/harnessing-the-power-of-typescript-for-building-a-simple-backend-application/feed/ 0 How to Setup SSH Tunneling in Mac OS (or Ubuntu) https://petaminds.com/how-to-setup-ssh-tunneling-in-mac-os-or-ubuntu/ https://petaminds.com/how-to-setup-ssh-tunneling-in-mac-os-or-ubuntu/#respond Sun, 09 Jan 2022 22:16:00 +0000 https://petaminds.com/?p=3639 When working with Jupyter notebooks on AWS, I want to interact with it directly in my browsers. In order to do so, we may need to create an SSH tunnel from our laptop to the remote server. If you are using a Macbook, you can easily do so using the default Terminal application available in […]

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]]> https://petaminds.com/how-to-setup-ssh-tunneling-in-mac-os-or-ubuntu/feed/ 0 PETAMIND IS NOW LIVING ON AWS https://petaminds.com/petamind-is-now-living-on-aws/ https://petaminds.com/petamind-is-now-living-on-aws/#respond Sat, 02 Oct 2021 19:12:28 +0000 http://13.238.174.212/?p=3170 After 3 years residing on Google Cloud, we decided to move to AWS. GC is generally OK, however, there is some issue related to the architecture of the previous one that may hinder the future scalability! As such, we decided to re-architecture the site and its workload for the future. There may be some issues […]

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]]> https://petaminds.com/petamind-is-now-living-on-aws/feed/ 0 GOOGLE CLOUD Top 5 CHEAT SHEETS https://petaminds.com/top-5-cheat-sheets-of-google-cloud/ https://petaminds.com/top-5-cheat-sheets-of-google-cloud/#respond Sun, 04 Jul 2021 20:47:00 +0000 https://petaminds.com/?p=2964 Sometimes a picture is worth a thousand words, and that’s where these cheat sheets come in handy. Cloud Developer Advocate Priyanka Vergadia has built a number of guides that help developers visually navigate critical decisions, whether it’s determining the best way to move to the cloud, or deciding on the best storage options. Below are five of […]

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]]> https://petaminds.com/top-5-cheat-sheets-of-google-cloud/feed/ 0 SECURITY GROUPS VS NETWORK ACLS https://petaminds.com/security-groups-vs-network-acls/ https://petaminds.com/security-groups-vs-network-acls/#respond Sun, 11 Apr 2021 21:40:00 +0000 https://petaminds.com/?p=2974 As the two common method for securing the cloud, the differences between NACL (network access control list) and security groups have been discussed below: Network ACL Security Group Network Access Control List that helps provide a layer of security to the amazon web services. There are two kinds of NACL- Customized and default. A security […]

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]]> https://petaminds.com/security-groups-vs-network-acls/feed/ 0 WHY DO WE NEED TO OVERRIDE EQUALS AND HASHCODE METHODS IN JAVA/Kotlin https://petaminds.com/why-do-we-need-to-override-equals-and-hashcode-methods-in-java-kotlin/ https://petaminds.com/why-do-we-need-to-override-equals-and-hashcode-methods-in-java-kotlin/#comments Fri, 19 Mar 2021 02:12:56 +0000 https://petaminds.com/?p=2889 In this post, we will discuss why it is important to override equals and hashCode method in Java/Kotlin. Item 9 in Josh Bloch’s Effective Java suggests always override hashCode() method if the class overrides equals(). In this post, we will discuss why this is necessary and good practice.  We know that two objects are considered equal only if their references […]

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]]> https://petaminds.com/why-do-we-need-to-override-equals-and-hashcode-methods-in-java-kotlin/feed/ 1 Network protocols quick notes https://petaminds.com/network-protocols-quick-notes/ https://petaminds.com/network-protocols-quick-notes/#respond Fri, 12 Mar 2021 01:53:00 +0000 https://petaminds.com/?p=2978 In the world of technology, there are vast numbers of users’ communicating with different devices in different languages. That also includes many ways in which they transmit data along with the different software they implement. Yes, we’re talking about “networking protocols” which are a set of rules that help in governing the way a particular […]

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]]> https://petaminds.com/network-protocols-quick-notes/feed/ 0 AMAZON EBS VS S3 vs EFS https://petaminds.com/amazon-ebs-vs-s3-vs-efs/ https://petaminds.com/amazon-ebs-vs-s3-vs-efs/#respond Sat, 09 Jan 2021 20:50:00 +0000 https://petaminds.com/?p=2913 Amazon EFS, Amazon EBS, and Amazon S3 are AWS’ three different cloud storage types that can be applied for different types of workload needs. Let’s take a closer look at the key features of each option, as well as the similarities and differences. Amazon EBS delivers high-availability block-level storage volumes for Amazon Elastic Compute Cloud (EC2) instances. […]

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]]> https://petaminds.com/amazon-ebs-vs-s3-vs-efs/feed/ 0 Tutorial: Multi-touch gesture for android https://petaminds.com/tutorial-multi-touch-gesture-for-android/ https://petaminds.com/tutorial-multi-touch-gesture-for-android/#comments Fri, 23 Oct 2020 03:34:21 +0000 https://petaminds.com/?p=2853 Multi-touch gestures are very useful in many common scenarios, such as zooming, panning. For game development, handling multi-touch is essential. This post will give a quick guide for handling multi-touch points. Project structure We create a new project name MultiTouch with Java and add a new class named GameScene as a subclass of android.view.View. The […]

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