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Java User Groups

Bugs are inevitable. Even after you thought you have finished coding your work, another bug creeps in, making you want to wish the bugs were real tangible objects that you could squish with your bare hands. Being a developer, you should be armed with the right weapons to battle bugs for they come almost all the time. In fact, they are building yet another Death Star. If you don't get vigilant,...
on Oct 24, 2012
Acceptance Test Driven Development (ATDD) is a method wherein business stakeholders, analysts, testers and developers collectively specify and agree on what needs to be completed in the project. Requirement specifications are set and verified even before actual development starts. This ensures that only those value-adding features are delivered to the business. Instead of validating after the...
on Oct 21, 2012
During the recent JavaOne conference, I was able to share how developers can put their Java codes up a notch by using functional programming and clean coding practices. Functional Programming puts the spotlight on what we want to get out of our codes rather than how we are going to execute them. With this in mind, codes are relatively easier to understand and are less error prone, due to the fact...
on Oct 20, 2012
Earlier this October, I was given the privilege of speaking at JavaOne regarding the fusion of contemporary Continuous Delivery processes and practices with the established and widely-accepted Maven release process. I spoke in detail about the similarities as well as the main differences, and how these techniques and methodologies can be combined to deliver iterations and releases that highlight...
on Oct 18, 2012
Behavior-Driven Development (BDD) is all the buzz now. To contribute to the increasing buzz BDD has been creating, I'm heading off to the Canberra JUG meeting next week to give a talk about it. BDD is a communication and collaboration process that aims to deliver what is only value-adding to the business. It is a process of establishing a common language between the business stakeholders and the...
on Oct 17, 2012
Next week holds a lot of exciting events for me at Canberra. Aside from delivering a talk on Behavior-Driven Development for the Canberra Java Users Group, I will also be conducting the Agile Java Development Practices workshop. If you want to learn how to write effective tests and better your code, produce high quality applications, know the latest on agile development tools and practices, and...
on Oct 17, 2012
Mattias Karlsson (@matkar) is a Java Champion, JUG leader, speaker, consultant, software vagabond, and founder of the Jfokus Conference (@Jfokus, which will take place February 4-6 in Stockholm, Sweden). At JavaOne 2012, I had an opportunity to chat with Mattias about Jfokus, Java User Groups, and the state of Java in Sweden. My first question was something I've actually wondered about for...
on Oct 14, 2012
Has been 1 year, after the Oracle vs Google saga, and I hear there will be appeal.. I am personally dunno what is appeal mean, i know sex appeal. huahua.. yes, I try to learn another tech and dedicate my time less to Java, touching NodeJS, try-ing Cloud, and yes, spending my time to my old hobbyes far become computer came to my life, fish tropical breeding. I live in emerging country, which...
on Oct 12, 2012
Meruvian is founded as a mix need between a legal entity for JUG Indonesia movement and also JENI (Java Education program founded by Ministery of Education) and a small project between Frans Thamura and Kompas (the biggest newspaper in the country, regarding OpenSource alternative to Microsoft solution which it is Sharepoint, we use Alfresco - the project lead by Rene -- and cannot related to my...
on Oct 12, 2012

Java Desktop

More than a few days ago a friend pinged me complaining that recent Eclipse release was quite sluggish. Since she had taken my performance tuning seminar she knew exactly how to get and read a GC log but as we all do, she was looking for a second opinion. After looking at the log for a minute it because quite apparent that the default configuration left the IDE starved for memory. After a bit...
on Oct 21, 2012
Do You Want to Get This Message? by Mark Fisher, Jonas Partner, Marius Bogoevici, and Iwein Fuld, authors of Spring Integration in Action Spring Integration allows you to selectively process messages and define alternative routes within the system. In this article, based on chapter 6 of Spring Integration in Action, you'll see how you can limit the scope of what your components will handle by...
on Oct 19, 2012
Architecture and Star Schema by William D. Back, Nicholas Goodman, and Julian Hyde, authors of Mondrian in Action Mondrian is expecting to perform its analytic magic on top of a star schema. In this article, based on chapter 3 of Mondrian in Action, the authors cover the general architecture of an analytic solution and then explore star schemas, the "best practice" database modeling technique...
on Oct 17, 2012
Searching at Scale by Trey Grainger and Timothy Potter, authors of Solr in Action One of the most appealing aspects of Solr, beyond its speed, relevancy, and powerful text searching features, is how well it scales. In this article, based on chapter 3 of Solr in Action, the authors explain how Solr is able to scale to handle billions of documents while still maintaining lightning-fast search...
on Oct 12, 2012

Java Enterprise

The definition of a PartialStateHolder according to the PartialStateHolder interface:   void clearInitialState()   boolean initialStateMarked()   void markInitialState()   Note that the methods above do not mention that a PartialStateHolder extends from StateHolder. Be aware that if you want to implement partial state saving you will also need to implement the methods...
on Oct 18, 2012
The definition of a StateHolder according to the StateHolder interface:   boolean isTransient()  void restoreState(FacesContext context, Object state)  Object saveState(FacesContext context)  void setTransient(boolean newTransient) Each of the methods mentioned above have a particular role to fulfill during the JSF lifecycle. Transient or not The setTransient method can...
on Oct 17, 2012
Since state saving happens as part of the JSF lifecycle a component, validator, converter, etcetera that wants to participate in state saving can do so by implementing or using one or all of the below mentioned APIs. StateHolder PartialStateHolder StateHelper StateHolder This is the original API that a component needs to implement if it wants to participate in what is now considered full state...
on Oct 16, 2012
During the JSF lifecycle state will be restored at the beginning of a request (if any state is available) and state will be saved at the end of a request (if any state is available). Why is it important to know what happens during request processing? Well, if you know how JSF state saving works you can optimize your application to perform better. The next blog entry will describe one of...
on Oct 16, 2012
The following blog articles are part of the JSF Converter series Introduction to JSF Converters The JSF Converter API The NumberConverter The DateTimeConverter Writing your own Converter Packaging your JSF Converter
on Oct 11, 2012
In the previous blog entry you learned how to write your own converter. Say you want to distribute this converter to others. How can you make sure the JSF runtime knows about the converter without needing to add it to the faces-config.xml of the web application. As described in the previous blog entry you need to register the converter in a faces-config.xml. To make it a redistributable...
on Oct 5, 2012

Java Web Services and XML

    Nowadays there are too many NOSQL database, with different architecture and data structure. However with much variety they share one thing in common: Only search information from the keys. A good option is uses other service to help the NOSQL databases. In this post will how the Lucene does work together a NOSQL database, join two world in one application.     The...
on Oct 13, 2012