Java generics is a great feature that allows you to have compile time checks for generics. However, due to historical reasons of backward compatibility, type information for generics is erased at runtime. A lot of the time this shouldn’t be of much concern. But there are a few cases where type information is needed at runtime for some kind of decision. 

One such situation is in Jakarta REST when the jakarta.ws.rs.core.Response object is used to return a generic collection of a specific type. For example the code below shows the creation and return of a Response object that has a list of HelloEntity as the return payload to the client. 

All non-trivial enterprise applications have some sort of constraints on the data the application processes. These constraints could range from the simplest to the most complex custom built types. The default validation API on theJakarta EEPlatform, Jakarta Bean Validation has excellent out of the box support for constraining bean fields. Then with its @Valid annotation, you can trigger automatic validation of constrained objects in certain points of an application. 

We are here with a carefully curated reading list! We put together the best content from the world of Java, Jakarta EE, cloud computing and open source. 

TL:DR - if you work with enterprise Java software, you'll find something here for you. 

We are excited to announce that registrations are now open forPayara Hackathon, running 2-6 March 2023. 

Build an app with Jakarta EE 10 and Payara Platform for a chance to win £3,000 in prize money for the winner, with £2,000 and £1,000 prizes for runners up. 

Get your work reviewed by our judging panel of Java and Jakarta EE experts including Java Champions Ivar Grimstad and Otavio Santana.

It's a new month, and this February the Payara Fish Pond is bristling with new releases for both Payara Platform Community and Enterprise editions. Payara Platform Community 6.2023.2 is out with 3 improvements and 5 bug fixes. Payara Platform Enterprise 5.48.1 contains 2 improvements and 5 bug fixes.

The Jakarta EE Platform has come a long way since its debut as J2EE back the days of Sun Microsystems. Over the years, it has had its fair share of challenges. A natural consequence of this is that some notions about the platform arising from some of the past challenges that may have been true about past iterations have stuck. This blog post aims to dispel some of these deeply rooted misconceptions about the Jakarta EE Platform, especially after the last major release.

Payara is part of the MicroProfile Working Group! 

MicroProfile is a set of Enterprise Java APIs and technologies, designed to help with the challenge of building microservices architectures in Java. 

The MicroProfile Working Group develops these APIs in a collaborative process, and is comprised of passionate individuals, and representatives from different vendors and Java User Groups.