Author: Vidisha Gupta

Data Ingestion in Druid – Overview

Reading Time: 4 minutes Hey folks, nowadays Big Data is the most trending topic and most of us are familiar with it as well as all the trending technologies. One of them is Druid which is a distributed, column-oriented, real-time analytical data store. A quick recap on Druid can be found on the blog posts https://blog.knoldus.com/introducing-druid-realtime-fast-data-analytics-database/. In this blog post, we will be discussing how data ingestion can be done in Continue Reading

Scala Extractors

Futures with Timeout in Scala

Reading Time: 2 minutes You all must be wondering timeouts in Futures, how is that possible? Don’t worry this is the right place to explore what do we mean by Futures with a timeout. I had encountered an issue of finding out if we can provide timeouts to futures in Scala without actually blocking them and guess what, this is possible. In this blog, we will be talking about Continue Reading

kafka with spark

Tuning a Spark Application

Reading Time: 4 minutes Having trouble optimizing your Spark application? If yes, then this blog will surely guide you on how you can optimize it and what parameters should be tuned so that our spark application gives the best performance. Spark applications can cause a bottleneck due to resources such as CPU, memory, network etc. We need to tune our memory usage, data structures tuning, how RDDs need to Continue Reading

monads

Back2Basics: Futures in Scala

Reading Time: 3 minutes Hey folks, in this blog we will be discussing and try to gather some knowledge on how multithreading, concurrency can be achieved and asynchronous computations can be done on immutable values by the use of Futures. Why do we need Futures? The concept of Futures was introduced to allow concurrent programming and avoid wastage of resources which will be blocked in case of sequential code. Continue Reading

Scala Extractors

Case Class Inheritance

Reading Time: 3 minutes Hello friends, as discussed in the previous blog we know what are case classes and what boilerplate code do they generate. Now in this blog, we will be discussing case class inheritance, how it can be achieved as the case to case inheritance is prohibited due to the equals and hashcode method case classes generate. We will also be telling the bad side of case classes. scala> Continue Reading

What is Uniform Access Principle?

Reading Time: 2 minutes Uniform Access Principle is a programming concept which was first introduced by Bertrand Meyer which stated that All services offered by a module should be available through a uniform notation, which does not betray whether they are implemented through storage or through computation. The principle simply means that the notation used to access a feature of a class shouldn’t differ depending on whether it’s an attribute or a Continue Reading

Scala Extractors

Case Class In Scala

Reading Time: 3 minutes Case Class is one of the great tool introduced by Scala in the functional programming world. case class Book(id: Int, title: String, isbn: Long) Let’s explore what’s hidden behind the above class. Case class is similar to a class but it provides a lot of boilerplate code for developers to use. By default, they are immutable i.e. once declared cannot be changed. If we compile Continue Reading

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