Still with Spring? 9 reasons to Akka

November 15, 2018Big Data and Fast Data, Functional Programming, Reactive ProgrammingAkka, Spring

As a niche consulting and development organization we end up in a lot of enterprises who would like to modernize, would like to build web-scale products but they are not ready to look beyond Spring. It is a strongly debated topic and there are reasons for still going the Spring way but the reasons are less and less as we go ahead. For starters, this Continue Reading

Welcome, Akka Typed !!

October 16, 2018Akka, ScalaAkka, typed

While I was attending ScalaDays Berlin 2018, I experienced many great ideas but the one which intrigued me the most was “Farewell Any => Unit, welcome Akka Typed!” by Heiko Seeberger where he explained about Akka Typed APIs. In this blog I am going to explain what I learned until now about Akka Typed, therefore, I named this blog “Welcome, Akka Typed !!”, so let’s Continue Reading

Migrating to Lagom 1.4.x?

October 3, 2018ScalaAkka, lagom, lagom 1.4, lagom migration, play

Hi, In this blog we will discuss some of the challenges we faced while migrating lagom version from 1.3.x to 1.4.x that can be helpful if you are thinking to migrate your lagom version. But firstly we will see the versions we should have for Scala, Play and Akka. Play and Akka Versions While migrating Play and Akka version too needs to upgrade. With Lagom Continue Reading

Code Combat II : The Code Battle For The Vanguard Continues…

June 28, 2018Akka, Apache Kafka, Apache Spark, Blockchain, Java, ML, AI and Data Engineering, ScalaAkka, Blockchain, events, java, learning, Machine Learning, scala, technology

“If you can dream it, you can do it. ” -Walt Disney For some coding is a job. For some, it is an exercise. But for us folks here at Knoldus, it’s a Passion. So in order to bring a twist in the daily work schedule, Knoldus held an overnight Hackathon competition within the organization on 18th May 2018 which presented an opportunity for every Knolder(employees 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

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

Streaming data from PostgreSQL using Akka Streams and Slick in Play Framework

March 26, 2018July 24, 2018Akka, Play Framework, Scala, Slick, SQLAkka, akka-streams, CSV, Play framework, postgreSQL, slick, Streaming

In this blog post I’ll try to explain the process wherein you can stream data directly from PostgreSQL database using Scala Slick (which is Scala’s database access/query library) and Akka Streams (which is an implementation of Reactive Streams specification on top of Akka toolkit) in Play Framework. The process is going to be pretty straightforward in terms of implementation where data is read from one Continue Reading

Knolx: Guaranteed No Stress Baby Steps Using Akka Streams Part-II

February 20, 2018August 10, 2018Akka, Java, Scala, StreamingAkka, akka-streaming, akka-streams, java, scala, Streaming, technology

Hello everyone, Knoldus organized a session on 25th November 2017. The topic was “Guaranteed No Stress Baby Steps Using Akka Streams Part-II”. Many people attended and enjoyed the session. In this blog post, I am going to share the slides & video of the session. Slides:

Knolx: Guaranteed No Stress Baby Steps Using Akka Streams Part-I

February 20, 2018August 10, 2018Akka, Java, Scala, StreamingAkka, akka-streaming, basics, java, scala, Streaming, technology

Hello everyone, Knoldus organized a session on 28th October 2017. The topic was “Guaranteed No Stress Baby Steps Using Akka Streams Part-I”. Many people attended and enjoyed the session. In this blog post, I am going to share the slides & video of the session. Slides:

Akka Split Brain Resolver – Problem and its Solution

July 4, 2017July 4, 2017Akka, ScalaAkka, akka-cluster, Akka-SBR, scala, Spilt-Brain-Resolver

AKKA Split Brain Resolver When operating an Akka cluster the developer will surely comes around network partitions (Split Brain scenarios) and machine crashes. There are multiple strategies present by lightbend to handle such erratic behavior and, after a deeper explanation of the problem we are facing, I will try to present them along with their pros and cons using the Split Brain Resolver in Akka, Continue Reading

Cinnamon: Way For Monitoring & Metrics Generation for Akka ActorSystem

July 3, 2017August 10, 2018Akka, Scala, Telemetry#Cinnamon, #telemetry, actosystem, Akka, cluster, gradle, lightbend, Logback, logs, maven, opensource, sbt, scala, technology

We are developing huge applications and deployed on multiple virtual machines and clusters. For monitoring applications, we need to enable logs into our application and analysis that logs with help of some tools like elastic stack. But !! what if we need to check health of application on virtual machines and clusters? For that, we are using several Metrics for system health check like Gauges, Continue Reading

Routing DSL in Akka HTTP

June 13, 2017June 8, 2018Akka, akka-http, Scala, Web ServicesAkka, Akka http server, akka-http, directives, dsl, High level server Api, http, http request, HTTP server, https, low level server api, Routes, Routing, routing dsl, Server Api

In this blog we’ll be discussing about the Routing DSl provided by Akka HTTP High level Server Side API. Akka HTTP provides a very flexible “Routing DSL” for elegantly defining RESTful web services. It picks up where the low-level API leaves off and offers much of the higher level functionality of typical web servers or frameworks, like deconstruction of URIs, content negotiation or static content serving. Continue Reading

Akka HTTP vs Other REST API Tools

June 12, 2017June 12, 2017Akka, akka-http, Play Framework, ScalaAkka, akka-http, Finch, http4s, play, scala, Scalatra, Spray

Hi Folks ! Lately there have been a lot of tools that allow us to build rest APIs like the following : Akka Http Play Scalatra http4s Finch Spray In my blog today, I will be discussing Akka Http and its counterparts(competitors) in terms of their advantages, disadvantages, performance and use cases. Let us begin comparsion of Akka-Http with Scalatra. Scalatra is a thread based,it Continue Reading

Say Hello to “Akka-Http”

June 12, 2017July 17, 2017ScalaAkka, akka-http, http, starting with akka

Hello folks, Hope you are enjoying your coding days!!! in this blog, I will explain a cool technology named Akka-Http which i have recently explored in my coding days!! Introduction The Akka HTTP implements a full server- and client-side HTTP stack on top of akka-actor and akka-stream. It’s not a web-framework but rather a more general toolkit for providing and consuming HTTP-based services. Akka.Http comes with Continue Reading

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