[nextpage title=“Introduction“] Introduction This time I will introduce you to WebSocket, Functional Programming in Java, and Reactive Programming in Javascript using the RxJS library. Take a look at what Wikipedia tells us about WebSocket: „WebSocket is a computer communications protocol, providing full-duplex communication channels over a single TCP connection. The WebSocket protocol was standardized by the ..

Read more

[nextpage title=“Introduction“] Introduction Apache Phoenix provides an SQL interface to HBase. It’s like an SQL layer on top of HBase architecture. In this tutorial, we are going to walk you through the development of a Apache Phoenix client application in Java. Phoenix enables developers to use standard SQL and JDBC APIs by leveraging HBase as its backing store. Although there ..

Read more

[nextpage title=“Introduction“] Introduction There are numerous techniques  for a client application to access an Enterprise Information System (EIS). The most common approach (and also best practise) is to use an application container on a middleware system (JBoss). It shields the EIS from direct client requests and also shields the client app from the business logic. See ..

Read more

[nextpage title=Introduction] Introduction This article describes the necessary steps to install, run and configure Jenkins on an Ubuntu server. The only prerequisites for this installation walkthrough are an Ubuntu server and access to a source code control system  like Subversion. You must also be included in the sudoers group sudo on the Ubuntu server. Everything ..

Read more

[nextpage title=“Introduction“] Introduction I’ve searched the internet for a good mobile client example using the Hessian protocol to communicate with a web container. I couldn’t find any which wasn’t based on Caucho’s website example using Jetty. So I decided to do a tutorial on my own. To make it more challenging, I chose Wildfly and ..

Read more

[nextpage title=“Introduction“] Introduction Everyone who came across Oracle’s „First Cup“ tutorial learned that it is based on NetBeans and Glassfish. Well, this is not the most popular development environment among Java EE developers. Nevertheless, the tutorial itself is undoubtfully excellent because it covers so many Java EE concepts. Too bad that it is not complete ..

Read more