Java Error: Could not find or load main class

When you are creating apps using an IDE like Eclipse or IntelliJ IDEA, compiling and running your code is pretty easy since the IDE will take care of many of the things behind the scenes. But you may encounter this

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Spring Component Annotation and further stereotype annotations

spring-spring-mvc-spring-boot

In this post I would like to share with you some enlightening quotes from spring documentation. Here you will see the difference between some of the spring annotations like @component, @service, @repository, @controller, what it means to use them or can

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Microservice Registration and Discovery with Eureka and FeignClient

netflix-eureka

In this post, I will try to guide you on how to develop with Spring’s wrapping of Netflix’s Eureka. Eureka is a REST (Representational State Transfer) based service that is primarily used in the AWS cloud for locating services for the purpose of

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Indexing, Retrieving, Deleting Documents in Elastic Search (Using Kibana)

elastic-search-kibana

Indexing, Retrieving, Deleting Documents in Elastic Search (Using Kibana) Elasticsearch (ELK Stack) – Part 1 I have been playing around with ELK (Elasticsearch, Logstash, Kibana – Elastic Stack) and I though I would paste some of my notes here. The

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Linking Jenkins to a Local Git Repository

I wanted to try creating a CI (continuous integration) pipeline using Jenkins at home for fun 🙂 I launched IntelliJ IDEA by jetbrains and created an empty test project. Then I added this project to Git. In case you don’t know

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Difference Between URI, URL and URN

What is a URI? URI (Uniform Resource Identifier) is a series of characters to identify a resource. It has the following format: scheme:[//[user[:password]@]host[:port]][/path][?query][#fragment] Here the “scheme” is mistaken for protocols. Schemes are not protocols. Many schemes have been designed to

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Authentication vs Authorisation

authentication-vs-authorisation

I see that many people are confused by the meaning of authentication and authorisation. People use the two interchangeably. They tend to use both authentication and authorisation for the same thing. But actually there is a difference between the two.

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Difference Between Hashing and Encryption

When it comes to security, you will hear a lot of people talking about things like hashing and encryption. But what are they? What are the differences? What are the practical approaches when it comes to choose which one to use? In

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