Reactive Programming Archives

Circuit breaker with Resilience4j

June 23, 2020June 23, 2020Architecture, Java, Non-Blocking, Reactive Application, Reactive Architecture, Reactive Programming, Scala, spring boot, Web ApplicationFunctional Programming, java, Reactive Programming, resilience4j, springboot

Reading Time: 4 minutes This article talks about the circuit breaker module from resilience4j library.

Diving Into Reactive Microservices

June 20, 2020June 20, 2020Microservices, Reactive Architecture, Tech BlogsMicroservice architecture design, Microservices, Reactive Architecture, Reactive Programming, reactive systems

Reading Time: 4 minutes It would be beneficial if you understand the concepts of Reactive Architecture before diving into Reactive Microservices. You can read about Reactive Architecture here: Leaning Towards Reactive Architecture In this article we will cover transition from Monoliths to Service Oriented Architecture to Reactive Microservices by applying isolation techniques to the application. What are Monoliths? To start explaining the microservices it’s useful to compare it to Continue Reading

Reactive Java: combining Mono(s)

February 19, 2020February 19, 2020Java, Microservices, Non-Blocking, Reactive Architecture, Reactive Programming, spring boot.switchIfEmpty(), .zipWith(), asynchronus, Reactive Programming, spring web flux, spring-boot

Reading Time: 4 minutes Reactive programming has been a good to go approach with the microservices architecture. Here we will see how it can be achieved using spring web flux MONO Api and what could go wrong if we do not consider the basics of the reactive environment.

Reactive Architecture

September 16, 2019September 16, 2019Akka, Architecture, Big Data and Fast Data, Non-Blocking, NoSql, Reactive Application, Reactive Architecture, ScalaCAP Theorm, NoSql Database, Reactive Programming, reactive systems, reactive systems architecture, Responsive

Reading Time: 2 minutes Recently I got an invitation to present a guest lecture for faculty of Engineering colleges in ABES college of Engineering. I came up with the most trending topic i.e Reactive Architecture. We talked about what is this buzzing keywords and why does it came into existence. Also What are the challenges one were facing and how are the real world problems being solved by using Continue Reading

Functional Java: Practicality of programming with immutability

August 26, 2019Functional Programming, Java, Reactive Programmingfunctional programing, immutability, learning, Reactive Programming, technology

Reading Time: 4 minutes Whenever we have tried to learn about functional programming, these two terms have always gained our attention. The first one is pure functions and the second one is immutability. I have tried to explain what are pure functions in one of my previous blogs. In this particular blog, we’ll discuss the practicality of programming with immutability. What does immutability mean? The definition that you can Continue Reading

Reactive Java: Understanding Reactive streams

August 8, 2019August 8, 2019Functional Programming, Java, Reactive Application, Reactive Programming, Streaming, Streaming Solutionsfunctional programing, Reactive Java, Reactive Programming, Reactive stream specification, technology

Reading Time: 3 minutes With a lot of buzz in the programming world about “reactive Programming”, a new concept following the same path has been introduced. This is “Reactive streams” backed up by the idea of backpressure. In this blog, we try to understand, what does it mean exactly? What are Reactive Streams? We are here talking about handling streams of data that needs to be handled in an Continue Reading

Functional Java: Understanding Pure Functions with JAVA

July 24, 2019Functional Programming, Java, Reactive ProgrammingFunctional java, Lambda Expressions in Java, pure functions, Reactive Programming, technology

Reading Time: 3 minutes Functional programming is a programming paradigm which is gaining its popularity day by day. It revolves around binding everything in pure mathematical functions style. It is is the process of building software by composing pure functions, avoiding shared state, mutable data, and side-effects. Functional programming is declarative rather than imperative, and application state flows through pure functions. We call it as a declarative type of Continue Reading

Spring Boot WebClient and it’s testing

July 9, 2019July 17, 2019Java, Microservices, Non-Blocking, Reactive Application, Reactive Programming, Scala, Web, Web Application, Web Servicesprogramming, Reactive Programming, Spring, springboot

Reading Time: 3 minutes This post talks about the Spring5’s WebClient feature to make calls to external APIs. Also, how unit test case are written for SpringBoot Webclient.

Spring Boot Webflux: The functional approach

May 21, 2019Functional Programming, Java, Reactive Programming#java, functional programing, Reactive Programming, spring-boot, technology

Reading Time: 3 minutes 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

Stream a file to AWS S3 using Akka Streams (via Alpakka) in Play Framework

May 4, 2018July 23, 2018Akka, akka-streams, Play Framework, ScalaAkka, akka-streams, alpakka, amazon web services, AWS, aws s3, File Transfer, File upload, Play framework, Reactive Programming, reactive streams, Streaming

Reading Time: 5 minutes In this blog post we’ll see how a file can be streamed from a client (eg: browser) to Amazon S3 (AWS S3) using Alpakka’s AWS S3 connector. Aplakka provides various Akka Stream connectors, integration patterns and data transformations for integration use cases. The example in this blog post uses Play Framework to provide a user interface to submit a file from a web page directly to Continue Reading

Exploring the Real Power of Functional Programming

December 31, 2017December 31, 2017Functional Programming, Java, Scalafunctional composition, functional programing, lazy evaluation, pure function, Reactive Programming

Reading Time: 3 minutes We have been programming with object-oriented technology for quite a while. But now we are moving away from it. Functional Programming is getting lot of attention nowadays. Even every mainstream language is now supporting functional style i.e Java, C++, C# etc. Basically, it is one of the paradigm of writing code where we write less code and do more. Why do we really care about Continue Reading

Knolders review of #venkat_50_50_tour at #DelhiJUG17 meetup

November 28, 2017August 10, 2018event, Functional Programming, Java, Reactive Applicationagiledeveloper, code coverage, Code Quality, Functional Programming, Java8, Knoldus@Conference, opensource, Reactive Programming, reactivex, Refactoring, technology, venkat_s

Reading Time: 3 minutes Dr. Venkat Subramaniam celebrates his 50th anniversary with distributing his smiles throughout the world’s Java User Groups (JUG) meetups, conferences, and events. Recently, he was in India and Delhi-NCR Java User Group organized one stop meetup for him. Needless to say, core to our culture of knowledge sharing caring, Knolders were a part of the event. In meetup, Venkat spoke about Designing Functional Programs Java 8 streams and why functional programming is Continue Reading

Reactors IO: Actors Done Right

October 17, 2017Functional Programming, Java, Reactive Application, ScalaFunctional Programming, java, Reactive Programming, reactors, scala

Reading Time: < 1 minute Hi all, Knoldus has organized a 30 min session on 1st September 2017 at 4:15 PM. The topic was Reactors IO. Many people have joined and enjoyed the session. I am going to share the slides here. Please let me know if you have any question related to linked slides or video. The slides of the KnolX are here: And Here’s the video of Continue Reading

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