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Medium: Digesting SOLID principles

Architecture design solid solidprinciples

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A Software Engineer with more than 7 years of experience.

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Email: harsha.kj89[at]gmail[dot]com

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Medium: Digesting SOLID principles

Photo by bert b on Unsplash Check my first article in the company( Servian ) blog. #softwaredesign #solidprinciples #softwarearchitecture https://servian.dev/digesting-solid-principles-81a102505541

Difference between AWS IAM Users,Policies, Roles & Groups

AWS Identity and Access Management (IAM) is a web service that helps you securely control access to AWS resources. It controls who can sign in to your AWS infrastructure and who is authorized to use the resources (EC2, VPS, IoT, Cognito, and etc) When I started earning AWS for the first, I had difficulties identifying the difference between Cognito and IAM. Cognito is a user management solution for your enterprise applications that also use IAM (Spring, JakartaEE, Angular, or any other application that you develop.) Check this example: https://www.harshajayamanna.com/2019/10/aws-cognito-spring-complete-example.html On the other hand, IAM is for the management of users in your AWS infrastructure. Root User When you sign up with AWS services for the first time, a Root user is created that has complete access to all AWS services and resources in the account. AWS recommends that we should not use this account to continue day-to-day tasks, instead, the first step is to create the first

MQTT, HTTP, or WebSockets for IoT Communication

MQTT (MQ Telemetry Transport) Protocol It is a publish/subscribe, extremely simple and lightweight messaging protocol. Why do we use MQTT? MQTT is designed for constrained devices that use low-bandwidth, high-latency networks. Let's look at one of the case studies from AWS IoT. Taiwan-based Weintek designs and manufactures human-machine interface (HMI) products. Before using AWS, HMIs were not connected to networks and they had to transfer and upload data manually to the network. Later, they decide to implement AWS infrastructure and use IoT Technology. Since MQTT is lightweight, it enabled them to collect data from thousands of machines using relatively little bandwidth MQTT pub/sub pattern Pub/sub pattern MQTT uses the pub/sub pattern to connect relevant parties. This protocol enables an application to announce events to multiple interested consumers asynchronously, without coupling the senders to the receivers. In this pattern, the publisher sends

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