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JVx 2.0

Hello everybody. 1st April is over and no worries, we won't stop JVx :)

Today is a great day because I'm very happy to announce JVx - version 2.0.

It's an awesome release because JVx 2 contains so many new productivity features. It's still a small codebase and the quality is very high. We made a big step forward and want to show you some details.

First of all, the LoC analysis. Here are some very interesting numbers for you:

JVx library   Swing UI
LoC   Type
63.447   Code
54.335   Comments (~ 46% of Code)
16.823   Empty lines
134.605   Total
LoC   Type
32.410   Code
18.285   Comments (~ 36% of Code)
7.271   Empty lines
57.966   Total
JVx library (Test cases)  
LoC   Type
16.650   Code
8.946   Comments (~ 34% of Code)
5.849   Empty lines
27.052   Total

This time, we broke the mark of 100.000 LoC (112.507). We thought it would be possible with 1.0 but now it happened! Our code is still well documented with about 42% of the LoC.

Some additional numbers:

Files and Tests
JVx library source files   501
Swing UI source files   132
Test source files   109
Total   742
Still a small codebase ;) and still very easy to maintain.
Unit tests (no UI, without manual perf. tests)   592
Class coverage (without UI)   78%
Method coverage (without UI)   66%

TOP 10 classes

Classname   LoC
MemDataBook 3.399
DBAccess 3.070
JVxTable 2.448
ArrayUtil 2.000
StringUtil 1.477
DBStorage 1.290
FileUtil 1.277
JVxFormLayout 1.178
XmlNode 1.054
SwingApplet 1.053

This is amazing because we have so many features and so less code. I think our quality standards have been met!

And last but not least, a short overview of new features:

  • New metadata cache

    The caching mechanism is now a real killer feature. No ORM library or any other DB API has a similar technique. JVx is unique in this area. What we do? We reduce database calls and requests. We have different cache levels like Global, per Session or per Connection. The cache is a learning cache and your application will be super fast in production mode.

  • Improved Constraints check

    Our linked cell editors (comboboxes, drop-downs) now shows columns from tables referenced via Foreign keys. Now the master table shows columns from tables referenced with Foreign keys. And also the resulting comboboxes show columns from referenced tables. If you have a clean database model, simple use your master table and the GUI is ready. If your database model isn't as clean as it could be, simply define your references with our APIs.

  • Cache mode for Security Managers

    Before JVx 2, a security manager was cached globally per application. Every session was checked with the same security manager. With JVx 2.0 it's possible to have a security manager per client. Every client could have its own security manager instance.

  • Focus listener support

    This is not rocket-science but important for all kind of UIs. Now JVx has support for it.

  • IController and IControllable

    This is completely new because it allows data navigation with centralized controls. Read more.

  • NO more session blocking

    Before JVx 2 the server implementation blocked simultanuous calls via DefaultObjectProvider. This wasn't a real problem for Desktop applications and with few users but it was in Web environments - especially with our Vaadin UI - or with e.g 500 users. This blocking is gone.

  • Session isolation

    Usually, a session has a specific Life-cycle object with business objects and actions. Such Life-cycle objects have direct access to the MasterSession of an application for convenience. If you want Life-cycle objects without access to the MasterSession this is the right feature for you.

  • New layout: UIGridLayout

    The layout is row/column oriented like good old AWT GridLayout.

  • Super-lazy-loading

    If you use down and up keys to navigate in tables with details, you'll be surprised. The standard lazy-loading mechanism loads data in blocks and on-demand. If you had master/detail relations in your screens this wasn't enough because every master record change did load the detail records. With JVx 2. this will happen if you release the down or up key. This is a nice productivity feature.

  • CheckBox CellEditor

    We now support "real" Checkboxes as cell editor. Our choice cell editor is image based and it doesn't support LaFs. Of course, with the right images it might look like a native Checkbox. Now you can use native Checkboxes. We recommend the choice cell editor for columns with multiple possible values, e.g. Yes, No, null. The Checkbox only has two states Yes or No.

  • MetaData customization

    With JVx 2.0 it's possible to set/change MetaData per Storage, e.g. add a Primary Key.

The list is not complete but shows biggest changes and all details are available in the Changelog.

Please download JVx 2 and send us your Feedback.

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