Angular 1 vs Angular 2 – a high-level comparison

Angular 2 is currently still in Alpha/Developer Preview, but the main functionality and the core documentation are both already available. Let’s gather here what is so far known about the design goals of Angular 2, and how they are planned to be implemented:

  • Mains goals of Angular 2
  • Simpler to reason about
  • Angular 1 vs Angular 2 change detection
  • More transparent internals with Zones
  • Improved stack traces
  • Much improved performance (and why)
  • Improved modularity
  • Improved Dependency injection
  • Web component friendly (how and why)
  • Support for Shadow DOM
  • Support for native mobile rendering in Android and iOs
  • Support for server side rendering
  • Improved testability
  • Migration path to Angular 2
  • Conclusions

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How does the MySQL JDBC driver handle prepared statements

Prepared statement types

While researching for the Statement Caching chapter in my High-Performance Java Persistence book, I got the chance to compare how Oracle, SQL Server, PostgreSQL and MySQL handle prepare statements.

Thanks to Jess Balint (MySQL JDBC driver contributor), who gave a wonderful answer on StackOverflow, I managed to get a better understanding of how MySQL handles prepared statements from a database performance point of view.

Basically, there are two ways of preparing a statement: on the server-side or on the client-side. Continue reading


Node.js Tutorial

Node.js Tutorial: A Beginner’s Guide

In this tutorial, I’ll teach you the basics of Node.js. Not only will you learn what Node is and what you can do with it, but you’ll see Node in action. We’ll build a simple application for a video rental store using Node, Express, Angular and MongoDB.

At a minimum, I’m assuming you have some web development experience. So you should know a bit of Javascript, HTML, and CSS, and have some familiarity with a web application framework such as ASP.NET MVC, PHP, Python or Rails. As far as Node, Express, Angular and MongoDB are concerned, I’m assuming you’re a beginner and that’s why you’re reading this tutorial. So, I’ll cover all these technologies from the ground up. If you do happen to have some experience with Angular and MongoDB, you can read this tutorial faster. Continue reading


Are you getting worked up over code duplication?

As programmers, we have long learned that Duplication is the Ultimate Sin of programming. Even considering to duplicate something is almost unthinkable.

But removing duplication introduces dependencies. If you and I use the reuse the same piece of code instead of duplicating it, changes I make may affect you. This effect can anything from beneficial (I fixed a bug you also needed fixing) to benign (I added a new feature that you’re not using) to detrimental (I want it to work in a way that’s no good for you).

When we have dependencies, we have to think: “Perhaps I shouldn’t add that feature – what if breaks something for someone else?” “Damn the torpedoes, I’m hacking it in!” or “Perhaps I’ll just make a fork for my changes and we’ll merge later”. Continue reading

Kugel, JAVA, Programmiersprache, Sprache, plattformunabhängig

Run java web apps in embedded containers with Maven, Jetty and Tomcat

While developing java web applications is very practical to have quick feedback from a “real” environment. In this post I’ll explore how to run a java web application with Maven in an embedded container be it Jetty or Tomcat.  I’ll show how I have configured them for the development of podcastpedia project backing the website.

Octocat Source code for this post is available on Github - is an open source project.

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A fresh look on accessing database on JVM platform: Slick from Typesafe

In today’s post we are going to open our mind, step away from traditional Java EE / Java SE JPA-based stack (which I think is great) and take a refreshing look on how to access database in your Java applications using the new kid on the block: Slick 2.1 from Typesafe. So if JPA is so great, why bother? Well, sometimes you need to do very simple things and there is no need to bring the complete, well modeled persistence layer for that. In here Slick shines. Continue reading

A beginner’s guide to Cache synchronization strategies


A system of record is the authoritative data source when information is scattered among various data providers. When we introduce a caching solution, we automatically duplicate our data. To avoid inconsistent reads and data integrity issues, it’s very important to synchronize the database and the cache (whenever a change occurs into the system).

There are various ways to keep the cache and the underlying database in sync and this article will present some of the most common cache synchronization strategies. Continue reading


What every Angular project likely needs – and a Gulp build to provide it

Starting an AngularJs project also means choosing a whole toolchain that goes along with Angular. In this blog post we will propose a set of tools that a new Angular project will likely need, and present a simple Gulp build that provides those features. Let’s go over the following topics:

  • Why Gulp? Goals for a baseline Angular build
  • Why use a CSS pre-processor, and why Sass
  • The advantages of a module system, and why browserify
  • Pre-populating the Angular template cache
  • Angular-friendly Javascript minification
  • Reducing the number of HTTP requests using sprites
  • Setup a development web server
  • Running tests with Karma, code quality with JSHint, and more

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Is IntelliJ IDEA shining through Eclipse?

As a long time Eclipse user, I want to give a more serious look to IntelliJ IDEA. The people from JetBrains were very nice and granted me an open source license for the  and projects. In the post I listed some of the things I use often in Eclipse and their equivalent in IntelliJ. I wrote this post so I can bookmark it and come back to, whenever I forget something, and if it helps others the better.

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