J and I and Me
  Dependency Injection Is More Than Wiring Components
Dependency Injection is widely used nowadays. However, at least in the Java EE space this is narrowed down to "wiring components". I think configuring beans and injecting simple types is at least as important. The alternative is to read in configuration properties from files. Here is why I think DI is the much better approach for that:

Of course this is not apparent during a short demo - but in real life DI for these kinds of applications it is a huge advantage.

Labels: , ,

  11:08 1 comments
Bookmark and Share
  Private or Public Cloud ?
Currently Cloud is to a lot of people synonymous to "Public Cloud" i.e. some company provides virtual machines or a platform to deploy applications on. Examples are Amazon AWS/EC2, Rackspace, Terremark, Google AppEngine, force.com, vmforce etc. But an enterprise can also build its own Private Cloud. Companies like VMware offer all the infrastructure you need - and there are Open Source offering like Eucalyptus or OpenStack. Which route should you take?

Public Cloud Advantages

Private Cloud Advantages

Maybe the truth is in the middle: Only for high load you might want to offload work to the Public Cloud. But then you would need a common API for the Public and Private Cloud. Also the Public Cloud would need the same access to data as the Private Cloud - which is doable but might not be trivial. And you would still get different latency.

But: Cloud is in its core a business model. Instead of investing in infrastructure you just rent it - which drives down capital expenditure. This can only really be achieved in a Public Cloud because only then you don't own the infrastructure. Also a Private Cloud can only offer as many ressources as you have purchased.

More applications and data than you think might end in the Public Cloud. The most sensitive business data of quite a few companies are in Salesforce already. If important data cloud not be in the Cloud Salesforce would been doomed - but the reality is that they are very successful.

PS: I would like to hear your opinion. In particular if you are interested to give a talk about "How and why we built a Private Cloud successfully" I would like to hear from you!

Labels: , ,

  10:22 0 comments
Bookmark and Share
  Book Review: 7 Languages in 7 Weeks (Bruce Tate)
I haven't done a book review in quite a while - so I thought it might be time to do one again. I have chosen Bruce Tate's "7 Languages in 7 Weeks". Bruce has written several books before that I found pretty interesting like "Bitter EJB" or "Better, Faster, Lighter Java".

I believe learning programming languages is a good way to improve as a Software Engineer - and it is one of the recommendation from "The Pragmatic Programmer: From Journeyman to Master" by Andrew Hunt and David Thomas. Even if you don't use the language in your everyday work you will get a different perspective on software development and learn new idioms.

In particular if you are used to Java it might be worth investigating a few new languages - especially those that run on the Java Virtual Machine (JVM).

Bruce covers the following languages:

For each language there is an introduction and three sections explaining the concepts. The final section wraps up what has been learned and shows strength and weaknesses. All of the material is pretty hands on. I found the best way to use the book is to read it while sitting at the computer so that you can immediately try out what the book talks about. Actually I bought the eBook. So I have the PDF open while I can type in stuff in another window. The book also contains some small exercises for self-study.

The book is very helpful to get started in the languages. The exercises are simple and give you an achievable goal to work towards. It is easily possible to work through the book in much less than 7 weeks - which is a good thing. The exercises are probably good for one or two hours each. The choice of languages is good: Some more academic ones like Prolog or Haskell, some that are currently hyped like Scala and Clojure. I was surprised to see Io on the list and I think JavaScript would have been a better choice, in particular with the Node.js framework. Also I am missing pointers for a deeper dive. Also frameworks like Lift for Scala or Rails for Ruby might have been worth mentioning. A language always comes with a set of tools and frameworks. So looking at the language in isolation is a good start but then you need to care about the other parts as well. So maybe that is beyond the scope of this book.

Bottom line: This is a great, very hands-on book that I would highly recommend if you want to see what is currently going on in the programming language space or if you are just curious and want to broaden your horizon.

Labels: ,

  14:42 0 comments
Bookmark and Share
  Preview: JAX 2011
The annual JAX conference in Mainz is the main event for Germany's Java scene. For JAX 2011 I had the pleasure to organize the Spring Day again. The schedule contains:

There will also be a basic Powerworkshop about Spring. This time I decided to do it based on Spring Roo which in my opinion is a great way to create Spring applications quickly. Also there will be an Advanced Spring Powerworkshop during which I will talk about advanced topics such as Patterns, architecture, migration to Spring etc.

During the conference I will also do a presentation about AMQP and RabbitMQ for Java developers and a presentation about Java PaaS.

Last but not least: We are planning a panel about the next decade in the Java world with Lothar Wieske and Stefan Tilkov. I am looking forward to this and I hope we will have some interesting discussions there. If there is anything you think we should be talking about I would be more than happy to hear about it!

So JAX 2011 will be quite a packed conference for me. But I am sure it will be a very nice conference again and I am looking forward to meet as many of you there as possible!

Labels: ,

  14:52 0 comments
Bookmark and Share
J for Java | I for Internet, iMac, iPod and iPad | Me for me

Juni 2005 / Juli 2005 / August 2005 / September 2005 / Oktober 2005 / November 2005 / Dezember 2005 / Januar 2006 / Februar 2006 / März 2006 / April 2006 / Mai 2006 / Juni 2006 / Juli 2006 / August 2006 / September 2006 / Oktober 2006 / November 2006 / Dezember 2006 / Januar 2007 / Februar 2007 / März 2007 / April 2007 / Mai 2007 / Juni 2007 / Juli 2007 / August 2007 / September 2007 / Oktober 2007 / November 2007 / Dezember 2007 / Januar 2008 / April 2008 / Mai 2008 / Juni 2008 / August 2008 / September 2008 / November 2008 / Januar 2009 / Februar 2009 / März 2009 / April 2009 / Mai 2009 / Juni 2009 / Juli 2009 / August 2009 / September 2009 / Oktober 2009 / November 2009 / Dezember 2009 / Januar 2010 / Februar 2010 / März 2010 / April 2010 / Mai 2010 / Juli 2010 / August 2010 / Oktober 2010 / Januar 2011 / Februar 2011 / März 2011 / April 2011 / Mai 2011 / Juni 2011 / August 2011 / September 2011 / November 2011 / Februar 2012 / April 2012 / Mai 2012 / April 2013 / Mai 2013 / Juni 2013 / Januar 2015 / Juli 2015 / Februar 2016 /


Google +
Das Spring Buch



Betreiber und Kontakt:
Eberhard Wolff
Leobschützer Strasse 22
13125 Berlin
E-Mail-Adresse: eberhard.wolff@gmail.com

Verantwortlich für journalistisch-redaktionelle Inhalte:
Eberhard Wolff