Welcome!

Java IoT Authors: Pat Romanski, Zakia Bouachraoui, Elizabeth White, Liz McMillan, Yeshim Deniz

Related Topics: Java IoT

Java IoT: Press Release

OpenXava 5.0 Released

Rapid Development for Java

OpenXava is an Java Framework for Rapid Development of Enterprise Web Applications. In OpenXava you only have to write the domain classes in plain Java to get a web application ready for production.
This 5.0 release has a new look & feel, includes module navigation, user login/logout (so you do not need Liferay anymore), inline editable collections (just like a spreadsheet), a new editor to attach files to your entity, and many many more things.

We invite you to download it and upgrade your OpenXava applications. Look at the migration instructions.

New look & feel

Just have a look at the demo to see the new look & feel.

Module navigation

At last, your OpenXava applications will include menus to access the modules:


So, you do not need use Liferay for providing module navigation to your application, a simple Tomcat is enough. Anyways, you can still deploy your application on Liferay where these new menus are not shown.

User login

Now your application will ask your user to sign in:

So, you do not need to use Liferay to provide user login/logout. Anyways, If you deploy on Liferay this login/logout mechanism will not be used. Moreover, you can disable it if you wish, for testing or for public applications.

Editable collections

In OpenXava 5.0 you can have collections like this one:

Where the user can modify any property of any element in any moment, and where all collection elements are saved at once when the main entity is saved.
These collections are defined using @ElementCollection, a new annotation of JPA 2 specification. These are collections of embeddable object (not entities).
For defining an element collection just use @ElementCollection instead of @OneToMany: Download OpenXava 5.0

@ElementCollection
@ListProperties("product.number, product.description," +
    "product.unitPrice, quantity, " +
    "amount[invoice.sum, invoice.vat, invoice.total]")
private Collection<InvoiceDetail> details;

And define the class for the element collection as @Embeddable instead of @Entity:

@Embeddable
public class InvoiceDetail {

The generated user interface for this code will be:


You can see how these collections support calculated properties, references, totals, etc.

Editor to attach files

Until now to attach files to your entities you should create your own editor. That is no longer needed, now you can use the new FILE stereotype, thus:

@Stereotype("FILE")
@Column(length=32)
private String trailer;

To get this:

It can be configured to store the files in the database or the file system.

Others improvements

We have done a lot of improvements in other areas:

  • New renderer engine to layout the user interface.
  • Look and feel of date editor improved.
  • Several reports in one PDF with the new JasperConcatReportBaseAction.
  • @Collapsed annotation to initiate collections and references with the frame closed. Also allowed in XML components.
  • New NoCustomizeList controller for disabling list customization to a specific module.
  • The user can share a report of 'My reports' with all other users.
  • New Addons project added to distribution to contain extended features outside of the OpenXava core.
  • New InvoiceDemo project added to distribution.
  • Groovy upgraded to 2.2.2.
  • JasperReports upgraded to 5.5.1.
  • DWR upgraded to 2.0.10.
  • JSTL upgraded to 1.2 using Apache Standard Taglibs 1.2.1.
  • JavaMail upgraded to 1.5.1.
  • Upgrade of commons libraries to: beanutils 1.8.0, logging 1.1.1, digester 2.1, codec 1.9, fileupload 1.3.1, io 2.4, lang 2.6, validator 1.4.0.
  • Upgrade to Servlet 2.5 and JSP 2.1.
  • Added Commons Lang3 3.2.1 library.
  • Tomcat 7 included in distribution.
  • Dropped IE6, IE7 and IE8 support.
  • Using module.jsp to execute modules from browser is no longer supported.
  • Dropped Java 5 support, from now on Java 6 or better is required.
  • Dropped WebSphere 6.1 and WebSphere Portal 6.1 support.
  • Dropped Tomcat 5.5 support.
  • Removed jakarta-oro library, only used by older commons-validator.
  • ejb.jar and jpa.jar added to WEB-INF/lib to facilitate deploying in Tomcat.
  • MiEscuela project removed from distribution.
  • AccessTracking removed from OpenXava distribution.
  • Objects class from org.openxava.util removed, you can use XObjects instead.
  • New is/setCollapsed() methods in View to close a frame of a reference or collection programmatically.
  • Added validateMinimum() and validateMaximum() to CollectionElementViewBaseAction.
  • New getPopupPDFPageCount() method in ModuleTestBase.
  • New methods setValueInCollection(), assertEditableInCollection() and assertEditableInCollection() in ModuleTestBase.
  • New method noFirstTokenWithoutFirstDelim() in Strings.
  • When @Digits is specified default scale is ignored even if fraction is not specified.
  • Performance of delete action in detail mode action improved.
  • Improved behavior with READ COMMITED isolation level.
  • New commit() and rollback() methods in BaseAction.
  • Methods Is.emptyString() and Is.emptyStringAll() allow infinite number of arguments.
  • clearCondition() method removed from ModuleTestBase.

Bug fixes

Though this is not a maintenance version we have done some fixes:

  • Fix: Double border when using .ox-frame in the CSS with new renderer.
  • Fix: Totals in collections frames are not shown with the new renderer.
  • Fix: assertListRowCount() method from ModuleTestBase fails when the value of summationInList property is false.
  • Fix: Subcontrollers fails in split mode.
  • Fix: Incorrect encoding in emails sent by Emails class.
  • Fix: Members inside @NoFrame are not aligned with the outside members.
  • Fix: Incorrect default size for java.lang.Boolean.
  • Fix: View broken on reload if the module is inside a HTML table.
  • Fix: Simple property after group without ; does not layout correctly.
  • Fix: A reference with @NoFrame inside a group produces an ugly layout.
  • Fix: Error messages for @Size in collections show 'Element' in English always, even if English is not used.
  • Fix: Top field with little margin on top with the new renderer.
  • Fix: Html id for frames not correct for references with new renderer.
  • Fix: Properties aligned by column when it should not in the new renderer.
  • Fix: Property icons are not aligned correctly with the new renderer.
  • Fix: Scale defined in default-size.xml is ignored when formatting.
  • Fix: Scale definition from @Column and @Digits is ignored when formatting.
  • Fix: The @LabelStyle annotation is not supported with the new renderer.

Download OpenXava 5.0

More Stories By Javier Paniza

Javier Paniza is the project lead for OpenXava project. He works as software developer at Gestión 400, a software company for public administration in Spain. He has been developing with Java Enterprise since 1998. Also he has been J2EE mentor for development teams in banking projects.

IoT & Smart Cities Stories
The challenges of aggregating data from consumer-oriented devices, such as wearable technologies and smart thermostats, are fairly well-understood. However, there are a new set of challenges for IoT devices that generate megabytes or gigabytes of data per second. Certainly, the infrastructure will have to change, as those volumes of data will likely overwhelm the available bandwidth for aggregating the data into a central repository. Ochandarena discusses a whole new way to think about your next...
CloudEXPO | DevOpsSUMMIT | DXWorldEXPO are the world's most influential, independent events where Cloud Computing was coined and where technology buyers and vendors meet to experience and discuss the big picture of Digital Transformation and all of the strategies, tactics, and tools they need to realize their goals. Sponsors of DXWorldEXPO | CloudEXPO benefit from unmatched branding, profile building and lead generation opportunities.
All in Mobile is a place where we continually maximize their impact by fostering understanding, empathy, insights, creativity and joy. They believe that a truly useful and desirable mobile app doesn't need the brightest idea or the most advanced technology. A great product begins with understanding people. It's easy to think that customers will love your app, but can you justify it? They make sure your final app is something that users truly want and need. The only way to do this is by ...
Digital Transformation and Disruption, Amazon Style - What You Can Learn. Chris Kocher is a co-founder of Grey Heron, a management and strategic marketing consulting firm. He has 25+ years in both strategic and hands-on operating experience helping executives and investors build revenues and shareholder value. He has consulted with over 130 companies on innovating with new business models, product strategies and monetization. Chris has held management positions at HP and Symantec in addition to ...
DXWorldEXPO LLC announced today that Big Data Federation to Exhibit at the 22nd International CloudEXPO, colocated with DevOpsSUMMIT and DXWorldEXPO, November 12-13, 2018 in New York City. Big Data Federation, Inc. develops and applies artificial intelligence to predict financial and economic events that matter. The company uncovers patterns and precise drivers of performance and outcomes with the aid of machine-learning algorithms, big data, and fundamental analysis. Their products are deployed...
Dynatrace is an application performance management software company with products for the information technology departments and digital business owners of medium and large businesses. Building the Future of Monitoring with Artificial Intelligence. Today we can collect lots and lots of performance data. We build beautiful dashboards and even have fancy query languages to access and transform the data. Still performance data is a secret language only a couple of people understand. The more busine...
Cell networks have the advantage of long-range communications, reaching an estimated 90% of the world. But cell networks such as 2G, 3G and LTE consume lots of power and were designed for connecting people. They are not optimized for low- or battery-powered devices or for IoT applications with infrequently transmitted data. Cell IoT modules that support narrow-band IoT and 4G cell networks will enable cell connectivity, device management, and app enablement for low-power wide-area network IoT. B...
The hierarchical architecture that distributes "compute" within the network specially at the edge can enable new services by harnessing emerging technologies. But Edge-Compute comes at increased cost that needs to be managed and potentially augmented by creative architecture solutions as there will always a catching-up with the capacity demands. Processing power in smartphones has enhanced YoY and there is increasingly spare compute capacity that can be potentially pooled. Uber has successfully ...
SYS-CON Events announced today that CrowdReviews.com has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5–7, 2018, at the Javits Center in New York City, NY. CrowdReviews.com is a transparent online platform for determining which products and services are the best based on the opinion of the crowd. The crowd consists of Internet users that have experienced products and services first-hand and have an interest in letting other potential buye...
When talking IoT we often focus on the devices, the sensors, the hardware itself. The new smart appliances, the new smart or self-driving cars (which are amalgamations of many ‘things'). When we are looking at the world of IoT, we should take a step back, look at the big picture. What value are these devices providing. IoT is not about the devices, its about the data consumed and generated. The devices are tools, mechanisms, conduits. This paper discusses the considerations when dealing with the...