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java

Concurrency API

Guide to Java 8 Concurrency API using Executors

Java, Studio-Scala, , , ,

Reading Time: 3 minutes Working with the Thread class in Java can be very tedious and error-prone. Due to this reason, Concurrency API was introduced back in 2004 with the release of Java 5 and then enhanced with every new Java release.The API is located in package java.util.concurrent. It contains a set of classes that make it easier to develop concurrent (multithreaded) applications in Java.  The executor services are one of the most Continue Reading

Knolx: The Hidden Mystery Behind Scala Functional Programming

Functional Programming, Studio-Scala, , , , , , , , , , , ,

Reading Time: < 1 minute Hello everyone, Knoldus organized a session on 25th January 2018. The topic was “The Hidden Mystery Behind Scala Functional Programming”. 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-II

Akka, Java, Streaming, Studio-Scala, , , , , ,

Reading Time: < 1 minute 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

Akka, Java, Streaming, Studio-Scala, , , , , ,

Reading Time: < 1 minute 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:

Difference between Mockito and JMockit

Java, Studio-Scala, Testing, , ,

Reading Time: 2 minutes A Brief analysis on Mockito And Jmockit Mockito JMockit 1. We can achieve Static method/constructor mocking by the combination of Mockito with Powermock. 1. Static method/constructor can be mocked directly in JMockit. 2. The Mockito API contains several inconsistencies in the syntax used for invocations to mocked methods. In the record phase, we have calls like when(mock.mockedMethod(args))… while in the verify phase this same call Continue Reading

Developers Needs SDKMAN Not Super-Man

Apache Spark, Java, linux, Spark, Studio-Scala, , , , , , , , , , , , , , , , , , , ,

Reading Time: 4 minutes Every developer has pain for setup development environment to his/her machine with lots of the setups. Sometimes, the pain goes beyond while we need to test same application on multiple versions of SDKs or virtual machines. If you are a Mac user, you have the best option called brew installer. But if you are Linux user, your pain is unpredictable. We are JVM stack developers Continue Reading

Unit Testing vs. Component Testing in Lagom

Studio-Scala, , , , , ,

Reading Time: 4 minutes Let’s first understand the basic difference between unit testing and component testing and then we will have a look at a practical application of unmanaged service in lagom with its test cases. Difference between Unit Testing and Component Testing Unit Testing involves testing of individual units(classes) to demonstrate that the program executes as per the specification and it validates the design and technical quality of Continue Reading

Reactors IO: Actors Done Right

Functional Programming, Java, Reactive Application, Studio-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

Like Java 7 ? Then You Are Going to Love Java 8 !!

Functional Programming, Java, , , , , ,

Reading Time: 5 minutes JAVA 8 (aka jdk 1.8) is a major release of JAVA programming language development. With the Java 8 release, Java provided support for functional programming, new JavaScript engine, new APIs for date time manipulation, new streaming API, etc. which will be discussed in detail. In this blog, we will focus on What’s New in Java 8 and it’s usage in a simple and intuitive way.We Continue Reading

Finagle : Controlling the Future Of RPC systems

Java, Studio-Scala, , , , , ,

Reading Time: 4 minutes In this blog we’ll use Finagle to build a very simple HTTP server that is also an HTTP client — an HTTP proxy. So Let’s Begin With Some Introduction to the Finagle. Finagle is an extensible Remote Procedure Call (RPC system) for the JVM, used to construct high-concurrency servers. Twitter Finagle is a great framework to write distributed applications in Scala or Java. It is Continue Reading

Solr with Java: A basic hands-on with SolrJ

Java, , , , ,

Reading Time: 2 minutes What is Apache Solr: Apache Solr is a search sever that includes the full-text search engine called Apache Lucene. It takes the piece of information (called documents) that are indexed according to the cores. When a query is performed, solr goes through the index and return the matching documents. Now let’s start the hands-on. Step 1: Install Solr from the following link. Step 2: Start Continue Reading

Lightbend Monitoring: Lagom

Microservices, Studio-Scala, , , ,

Reading Time: 3 minutes Lightbend Monitoring provides insight into applications built with Lightbend technologies. It does so by instrumentation of frameworks like Akka and Lagom. The instrumentation is done by a Java agent (called Cinnamon) that runs when your application is starting up. It collects information in runtime based on the configurations that you have provided. In this post, we would show the Circuit Breaker (CB) monitoring with Lagom. Continue Reading

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