Knoldus Blogs

Creation of AWS Instance and Installing Java using Ansible

November 21, 2021November 21, 2021Studio-Scala

Reading Time: 4 minutes INTRODUCTION AWS Amazon Web Services (AWS) provides cloud services throughout the world also AWS provides servers, storage, networking, remote computing, email, mobile development, and security. ●AWS EC2: Amazon Elastic Compute Cloud (Amazon EC2) is a web service that provides secure, resizable compute capacity in the cloud. It is designed to make web-scale cloud computing easier for developers.Indeed EC2’s is a simple web service interface that Continue Reading

Simple Guidance For You In Case Class And Pattern Matching

November 19, 2021November 19, 2021Studio-Scalacase class, Functional Programming, Pattern Matching

Reading Time: 2 minutes Case classes are like regular classes that have default apply() method which handle object construction. There is no need to use a new keyword to create an object. Case class provides purely functional code with immutable objects. Case classes are a representation of a data structure with the necessary methods. It support pattern matching. Syntax of case class:- Example:- When you create a case class Continue Reading

What Are Namespaces?

November 19, 2021November 19, 2021Studio-Scala

Reading Time: 3 minutes Namespaces are a feature of the Linux kernel that partitions kernel resources such that one set of processes sees one set of resources and another set of processes sees a different set of resources. When you’re running many different processes and applications on a single server, as is the case with deployment tools like Kubernetes, it’s important to have each process isolated, mostly for security. Continue Reading

Expressions and Control Structures in Solidity

November 18, 2021November 18, 2021RustRust, Solidity

Reading Time: 3 minutes Hey Readers! Welcome back to the world of Solidity. In this blog we will see what are the Expressions and Control Structures in Solidity. Expressions and Control Structures in Solidity is a vast concept that we will see today. Control Structures Most of the control structures known from curly-braces languages are available in Solidity: There are if, else, while, do, for, break, continue, return, with Continue Reading

JMeter : Rising Performance Capabilities

November 18, 2021November 18, 2021Test Automation StudioJMeter, Performance Testing, Testing

Reading Time: 4 minutes What is JMeter? Apache JMeter is a popular open-source testing software. JMeter is a Java based application for performance testing. It is mainly use for testing the Web application or FTP application, but also currently it is applicable in JDBC database connections, functional testing etc. How Does JMeter Works? Why JMeter? Open-source : It can be download free of cost. User-friendly : JMeter is easy Continue Reading

JavaScript Fundamentals: CORS

November 18, 2021November 18, 2021JavaScript, User Interface (UI)CORS, Javascript, SOP

Reading Time: 3 minutes What is CORS and what does it mean? “CORS” stands for “Cross–Origin Resource Sharing”. It allows you to make requests from one website to another website in the browser. Servers host web pages, applications, images, and a whole bunch of other stuff. When we use a browser, we are likely to access different websites and go through a lot of online content which may or may not reside Continue Reading

PDI: An Introduction to Spoon

November 17, 2021November 17, 2021ETLData Integration, PDI, Pentaho

Reading Time: 4 minutes Prerequisites: Basic knowledge about Big Data and ETL. What is PDI? PDI stands for Pentaho Data Integration. It is a tool that provides us with ETL capabilities to effectively manage huge and complex data ingestion pipelines. Its use cases include: Loading huge data sets into databases. Performing simple to complex transformations on data. Data migration between different databases. and many more… Installing PDI in your Continue Reading

SS Command in Linux

November 17, 2021December 30, 2021Studio-DevOps

Reading Time: 3 minutes Linux has variety of command line utilities that we use to perform our basic tasks whether its networking or administration or anything else. One of the utility that we have mostly used in networking is netstat, We use the network statistics or netstat for troubleshooting or viewing connections and many more. This SS command is another utility which can replace netstat and this command is Continue Reading

Generating your own Javadocs for your Package

November 17, 2021November 17, 2021Javaannotations, Documentation, Intellij idea, java, Java8, JavaDoc, package, tags, Tool

Reading Time: 4 minutes Documenting whatever work you are doing as a developer or tester is always a good idea hence we are going to learn about Generating JavaDocs for your own package. Documentation can easily describe info about which method/class/entity to use and when. Hence, a reliable documentation is a must for a developer. Just think if you are not aware of a certain language then how difficult Continue Reading

Apache Calcite : Evaluating REX Expressions

November 16, 2021November 16, 2021Apache Calcite

Reading Time: 2 minutes Apache Calcite is a dynamic data management framework. It provides a SQL parser, validator and optimizer. Using the sub-project Avatica we also have the ability to execute our optimized queries against external databases. Every row expression (rex) in a SQL query is defined as a ‘RexNode’ internally which can be an identifier,a literal or a function.In this blog we will illustrate evaluating functions involving literals Continue Reading

Private Blockchain Benefits: Explained!

November 16, 2021November 16, 2021Blockchain, Business Insights, Studio-ScalaBlockchain, Blockchain Development, Private Blockchain

Reading Time: 2 minutes Private Blockchains are reserved and authorization-based as opposed to public Blockchains (such as Ethereum and Bitcoin). This concept of private Blockchain assumes that an organization or an entity must get an invite to join the private network. It is a secure and locked ecosystem where only invitees/members are allowed access. Private Blockchains are impeccable for building a closed B2B transactional network among a few business Continue Reading

How to Design Microservices Architecture?

November 16, 2021November 16, 2021Business Insights, MicroservicesMicroservices Architecture, Microservices implementation

Reading Time: 3 minutes The technology sector is all excited over microservices. It is capable of breaking up huge applications into reduced, independently managed, and updated components, making it a go-to option. Microservice benefit stories build up excitement on one side, and on the other hand, its design is not just so easy. Microservices have a vast potential for altering the institution’s application guidelines. Microservices applications allow you to allocate work Continue Reading

Docker Cheat Sheet for getting started easily

November 16, 2021November 16, 2021Studio-Scala

Reading Time: 3 minutes Docker is free software developed by Docker Inc. The time after its release it became a must in the field of IT development. It allows users to create independent and isolated environments. It is very helpful in launching and deploying any applications easily. These deployed applications are available to us in form containers. Containers give isolated environments from one another and bundle their own software, libraries, and configuration Continue Reading