Functional Programming

Spring Boot Webflux: The functional approach

With the world moving towards the reactive and functional ways of programming, Spring also turned its steps on the same path. This leads to the origin of Spring Webflux. To understand the functional approach towards it, we first need to understand, what is Spring Webflux exactly? Before Spring version 5.0, the original web framework included in the Spring Framework, Spring Web MVC, was built for Continue Reading

Hawk-Rust Series: AWS Lambda for image recognition

This blog is about the heart of the Hawk which is the image recognition process. For this, we used Amazon Rekognition service. Don’t worry I will come to all these terminologies step by step. But I advise you to first go through the first blog post of Hawk-Rust series which will help you to understand the overall architecture of the Hawk. You can refer it Continue Reading

Data processing using ML Supervised classification algorithm to find accuracy

Machine learning is an application of artificial intelligence (AI) that provides systems the ability to automatically learn and improve from experience without being explicitly programmed. Machine learning focuses on the development of computer programs that can access data and use it to learn for themselves. Type of machine learning Supervised learning Unsupervised Learning Reinforcement Learning In Supervised Learning, algorithms learn from labeled data. After understanding Continue Reading

Getting Started with Akka Remoting

When we start with Akka we generally start with one actor system on our local machine but when we talk about the business application we can have multiple parts of an application and those part can run on different machine or node. Akka Remoting is a communication module to connect the actor system in peer to peer fashion. It also serves as the foundation for Continue Reading

Why programming community should be serious about RUST

I have been exploring Rust from the last few weeks, as it has been declared the most loving language in 2018. As a Scala/Java developer, I worked on many applications, which were related to the banking domain, web applications, mobile applications, e-commerce, social media, etc. But I was not able to find what kind of applications should be built in Rust? I have searched Rust’s Continue Reading

Cassandra Tombstones – DEMYSTIFIED

One thing that Cassandra provides is the “optimized for writes” feature. In Cassandra everything is a write including logical deletion of data which results in tombstones – we can call them special deletion records. Indeed the lack of understanding of tombstones is often the root cause of production issues that people experience with Cassandra. While working on the production cluster we have seen tombstones can Continue Reading

Flinkathon: Guide to setting up a Local Flink Custer

In our previous blog post, Flinkathon: First Step towards Flink’s DataStream API, we created our first streaming application using Apache Flink. It was easy, clean, and concise. However, the real power of Apache Flink is seen on a cluster, where data is processed in a distributed manner, with the advantage of multi-core/multi-memory systems. So, in this blog post, we will see how to set up Continue Reading

Different ways for `Error Propagation` in Rust

Error Propagation means the code, that detects the problem, must propagate error information back to the caller function so that it can handle the problem. In the real world, the practice of Error Propagation is necessary. One of the benefits is that your code will look cleaner by simply propagating error information back to the caller that can handle the error and another benefit is Continue Reading

Determine Kafka broker health using Kafka stream application’s JMX metrics and setup Grafana alert

As we all know, Kafka exposes the JMX metrics whether it is Kafka broker, connectors or Kafka applications. A few days ago, I got the scenario where I needed to determine Kafka broker health with the help of Kafka stream application’s JMX metrics. It looks bit awkward, right? I should use the broker’s JMX metrics to do this, why am I looking to application JMX Continue Reading

Realm: What and Why?

In this blog, I will be introducing the Realm along with its ecosystem and components in detail. Introduction The realm is a NoSQL based server and a client component. The components connect via a fast and efficient sync protocol. It enables real-time, connected apps and services that are responsive and performant irrespective of network status. The design of the realm is based on the principle Continue Reading

HAWK-Rust Series: Automate Infrastructure using Terraform

HAWK is a Rust based Image Recognition project, which implements a two-factor authentication by using the RFID card for user identification and Image for user validation. In this project, we have used AWS services and the whole AWS infrastructure required by this project is automated using Terraform (a tool for building, changing, and versioning infrastructure safely and efficiently).

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