Blog - OpenXava

June 27, 2022

Video for lesson 17 of OpenXava course

In this new lesson of our course, you'll learn to use the Hibernate @Formula annotation in your OpenXava entities, so you can map a SQL statement to a property. This allows you to have properties with a calculation where you can search and filter in list mode. Watch the video.

June 7, 2022

Video for lesson 16 of OpenXava course

Calculated properties, those with just a getter, allows you to define any imaginable calculation using Java, but given that they have not a column in the database, your user cannot search or sort for that property. A way to solve this problem is to have a persistent property too, and synchronizing both, persistent and calculated, using a JPA callback method. It's not so difficult, watch the video.

May 30, 2022

Video for lesson 15 of OpenXava course

Until now we have used @DefaultValueCalculator to calculate the next number of invoice or order in our small invoicing application, but this does not work in multiuser applications. To solve this problem, we're going to change it for a JPA callback method, using @PrePersist in this case. Watch the video.

May 23, 2022

Video for lesson 14 of OpenXava course

In this new video you'll see an example of modifying the tables of your database using SQL statements directly, because sometimes the automatic schema evolution of OpenXava is not enough and we don't want to lose data in production databases. We invite you to watch the video.

May 16, 2022

Video for lesson 13 of OpenXava course

In our invoicing application we're using as example we want that when the user clicks to create a new invoice or order the default value for VAT will be 21, but also we want to change this default value in any moment without changing the source code. To achieve this we're going to use a @DefaultValueCalculator and write the logic to read the default value for VAT from a properties file. Watch the video.

May 9, 2022

Video for lesson 17 of OpenXava course

Video for lesson 16 of OpenXava course

Video for lesson 15 of OpenXava course

Video for lesson 14 of OpenXava course

Video for lesson 13 of OpenXava course

Video for lesson 12 of OpenXava course

Video for lesson 11 of OpenXava course

Software for hospitals with OpenXava

Video for lesson 10 of OpenXava course

Video for lesson 9 of OpenXava course

XavaPro 6.6.3 released

OpenXava 6.6.3 released

From RPG to Java with OpenXava

View inheritance to reuse UI definition

JPA inheritance and agile development

XavaPro 6.6.2 released

OpenXava 6.6.2 released

From Struts 2 MVC to OpenXava

XavaPro 6.6.1 released

OpenXava 6.6.1 released

Business software in the cloud with Java

XavaPro 6.6 released

OpenXava 6.6 released

OpenXava for teaching

Refine the user interface with OpenXava

From COBOL to Java with OpenXava

Video for lesson 3 of OpenXava course

Potable water in Ecuador

Video for lesson 2 of OpenXava course

XavaPro 6.5.3 released

OpenXava 6.5.3 released

An ERP for the metal industry

Official YouTube channel for OpenXava

XavaPro 6.5.2 released

OpenXava 6.5.2 released

Looking for an OpenXava developer in Valle del Cauca

Ministry of Finance of Nicaragua with OpenXava

XavaPro 6.5.1 released

OpenXava 6.5.1 released

RFID solutions with OpenXava

Looking for a OpenXava developer in Misiones

XavaPro 6.5 released

OpenXava 6.5 released

University software made with OpenXava

The best Java frameworks of 2020

Coruña Harbor Market with OpenXava

XavaPro 6.4.2 released

OpenXava 6.4.2 released

ZX-Ed: Open source database editor

XavaPro 6.4.1 released

OpenXava 6.4.1 released

From Excel to OpenXava

XavaPro 6.4 released

OpenXava 6.4 released

Online Management Systems for Schools

XavaPro 6.3.2 released

OpenXava 6.3.2 released

Cloud ERP with OpenXava

XavaPro 6.3.1 released

OpenXava 6.3.1 released

Intelligent Transport Systems with OpenXava

XavaPro 6.3 released

OpenXava 6.3 released

From Visual FoxPro to OpenXava

Maven support for OpenXava

Custom Closet Designs in New York

XavaPro 6.2.2 released

OpenXava 6.2.2 released

Modern web apps without JavaScript

XavaPro 6.2.1 released

OpenXava 6.2.1 released

Belgian Chocolate with OpenXava

New issue and bug tracker for OpenXava

XavaPro 6.2 released

OpenXava 6.2 released

Hospitals, Buses and Funeral Parlors

Looking for a OpenXava developer in Misiones

Looking for a OpenXava developer in Cartagena

XavaPro 6.1.2 released

OpenXava 6.1.2 released