Edgar Silva's Blog

June 2006 Archives

Creating and Drawing Diagrams on Web

This tool is really cool: http://www.gliffy.com , as which you can draw really cool diagrams using only the WebBrowser.

When you should create some diagrams to explain your architectures, user interface prototypes and til new dispostion of the stuffs in your bedroom :)

UI Prototype

Perfect Home Office

Thanks Miojo by tell me about that!

Cya

J/XFS – Java eXtensions for Financial Services

Sometimes I talk with my friends about the technology I'm woking on and evrebody says “JX...What?” .
In fact J/XFS is not so popular API as EJB, JDBC, Servlets or JCA, however it could really help real “enterprise” applications a lot.

What is J/XFS (Java eXtensions for Financial Services)

Java eXtensions for Financial Services, is a specification that defines how you can develop for Devices, such as a Receipt Printer, PinPad, Card Reader device, Check reader and more.

“Utilizing the Java language, J/XFS provides a standard for a banking device subsystem with real platform and hardware independence which enables the access to banking peripherals for new Java banking applications. It also provides a migration path for current financial I/O subsystems and ensures co-existence between current Client/Server and new Java banking applications, so customer investments in banking device infrastructure are protected. J/XFS enables full transparency between the application and the device level while providing a flexible and extensible.”

J/XFS is managed by CEN (European Commitee for Standarzation), though a couple of companies, which defines the standard’s evolution, changes and improvements. The following companies composes the core comitee:

Sun Microsystems
IBM
De La Rue
NCR
DIEBOLD
Windorf/Nixdorf

Then, J/XFS is a kind of specification, such as JDBC, EJB, JCA, JMS, but it covers how you can work with pheripherals as standard way. In other words, use the most valuable Java concept “WORA – Write Once Run Anywhere”.

Why J/XFS is so important?

Nowdays, does not matter if you are developing an application for a Bank or a point of sales for some Super Market, you will use devices, such as Printers, PinPads, Check readers and so on, and thinking in that solution you have a lot of Manuals describing commands you should use to interact with devices, for example:

Z1S2+ “Please type your pin code”

Imagine that this command above can request that user type his pincode in some pinpad.

To enable that in Java, you can use Java Communication API (for Windows) or RXTX (for Linux), and read data though ports and creating a communication protocol.

So, you spend a lot of time implementing middleware for a set of devices, just to your new customer select a different brand of devices which has a new command to ask for a password, something like:

@$%Please type your password%$

...and your work began all over again.

Ok, you are a clever Architect, and you can solve it using a couple of
Design Patterns, this will make you a pop star in your company, but ...
Even if you did a nice implementation, you should create a lot of new
implementations each time a new vendor appears and that's not the Java Way!!!

We need real standard, and J/XFS offers exactly that: a standard.

Drivers

Remember JDBC? Well, this is something much like that. For any new set of devices vendors make available J/XFS drivers in the same way JDBC drivers are made available by RDBMS vendors.

If you understands how JDBC works, you can understand a lot of things about J/XFS.

Conclusion

I would like so much to see a JSR covering the same aspects that J/XFS covers nowadays. I really don't know how long it will take to do this, but at JavaOne I saw one JSR proposed, and approved very fast !

If somebody would like to make a join effort to define a JSR, I know some people that can help with it.

It would be awesome to see:

javax.devices.api ☺

cya

Get More Informations :

http://jxfs.net/
http://jxfs.net/jxfsPortal/faqfolder
http://www.cenorm.be/cenorm/businessdomains/businessdomains/isss/activity/wsjxfs.asp

What you think about a Beautiful and Useful JavaDoc

Why only customers can use Web2.0 applications? And the Developers? Ok, We have access to Gmail, Flick, box.net, a lot of really cool geeks apps, but we can turn our JavaDocs, much more impressive then we have nowdays.To do that use Docwrench Doclet (http://www.docwrench.com/). The Following Image shows how look your future Docs:

Reading this site, I think it is an evaluation, but it would be great if could be free, and maybe to integrante as a plugin in Maven2.

Ajax Java Slides

Dave Johnson - eBusiness Applications' CTO, just posted his slides for the AJAX + Java Webinar and some screencasts showing how to use DWR with NetBeans over the weekend and I will be presenting that along with a few slides about AJAX + Java on a webcast over at developer.com. Check out the link there for all the details.

Congratulations Dave!

Edgar

This work is licensed under a Creative Commons License.