Java in the Cloud

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  • Payara Services Wins Prestigious Queen’s Award!

    Micro-multinational open source software company, Payara Services, has been commended for its achievements within global trading and exporting with the Queen’s Award for Enterprise for International Trade.

    Now in its 55th year, the Queen’s Award for Enterprise: International Trade is the UK’s most prestigious business award, honouring organisations that have excelled in overseas exports whilst maintaining the highest standards in social, economic, and environmental activity.

    Jadon Ortlepp
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    • Java
    • Java in the Cloud

    Elastic JVM: Configuring G1 GC for Automatic Vertical Memory Scaling

    Nowadays, JVM-based applications can benefit from elasticity and density of container technology. However, there are still some issues that prevent unleashing the full potential of Java and containers “marriage.”

    Releasing unused but committed Heap memory by the major JVM implementations based on OpenJDK, in most cases, is not performed automatically, or requires specific knowledge to be configured.

    Tetiana Fydorenchyk
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  • Why Java Developers Continue to Rely on Jakarta EE

    Over the past year, the Eclipse Foundation spoke to leading Java developers around the world to discuss why they rely on Jakarta EE and the unique benefits of using Jakarta EE technologies.

    Their input is captured in our white paper, which describes the important advantages Jakarta EE offers today and for the future.

    Ivar Grimstad
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    • Java
    • Java in the Cloud

    Java Garbage Collection Types and Settings Customization via Jelastic PaaS

    Performance and price are two big considerations in application hosting that always matter. And, often, we question ourselves on how to decrease the spends, without affecting the performance of your apps at the same time. In this article, we’d like to address automatic memory management for Java applications hosted with Jelastic using garbage collection.

    Let’s clarify what garbage collection is, what it does for Java applications and how it works within Jelastic PaaS.

    Tetiana Fydorenchyk
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  • 2021 Jakarta EE Developer Survey

    This is the fourth Jakarta EE Developer Survey, so it is safe to say that it has become an annual tradition and is your chance to influence the direction of the Jakarta EE working group.

    The survey last year had more than 2000 responses from individuals around the World. Let’s beat that number this year!

    Ivar Grimstad
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  • Getting Started with Jakarta EE 9: How to Create a REST API with Jakarta EE 9

    In this second article of the Getting Started with Jakarta EE 9 series, we show you some basic scenarios using the REST specification.

    Although most people are using the term REST or RESTful API just to indicate they do data transfer over HTTP, and  ignore the “Hypermedia as the engine of application State (HATEOS)” part of REST. The technology is used a lot lately to connect the front-end with the back-end.

    For those who are not familiar with Jakarta EE, this article should give you an indication how to create such a REST API with Jakarta EE 9.

    Jadon Ortlepp
    Rudy De Busscher
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  • Building Microservices with Spring Boot Fat (Uber) Jar

    In most minds, microservices is an approach to make a traditional monolithic system more structured, dividing it into logical components that correspond to different functional areas of application.

    Thus, acting as a microservice, each component becomes self-contained, easily scaled, maintained and even upgraded without affecting the overall system.

    Also, with a microservice architecture, you can use a software written in different programming languages, including Java.

    Such freedom attracts but may frighten at the same time.

    Tetiana Fydorenchyk
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  • Jenkins Cluster for Continuous Integration and Delivery (CI/CD) inside Jelastic PaaS

    In this article, we’ll describe how to install Jenkins cluster with slave nodes auto-discovering and self-registering inside a master node.

    Jelastic PaaS implemented this solution in Jenkins DevOps Pack that can be installed from the Marketplace or through environment setup wizard as a New Environment.

    In this tutorial we’ll cover both. Also, you will find out how to build a simple Java project hosted on GitHub using Jelastic Maven plugin.

    Tetiana Fydorenchyk
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  • Getting Started with Jakarta EE 9: Hello World

    The release of Jakarta EE 9, at the end of 2020, was in many ways a historic event. The Java Enterprise framework is already 20 years old, having its first release in 1999. It has changed names a few times but the main concepts of the first release can still be found in this new release. During all those years, it has adapted itself to keep it up to date but has always adhered to its main principle of stability and backward compatibility.

    Regarding backward compatibility, this release was also historic as the namespaces changed (like package names that changed from ‘javax’ to ‘jakarta’). The change is straightforward, no other changes are introduced between Jakarta EE 8 and EE 9.  This to make the migration as easy as possible.

    Jadon Ortlepp
    Rudy De Busscher
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    • Java
    • Java in the Cloud

    Spring Boot and Java 16 Records

    On March 16th, 2021, Java 16 was GA. With this new release, tons of new exciting features are added. Check out the highlights here on Foojay to know more about these changes.

    In this article, we’ll focus on Java Records, defined in JEP 395. Records were first introduced in JDK 14 as a preview feature, proposed by JEP 359, and with JDK 15 they remained in preview with JEP 384. However, with JDK 16, Records are now no longer in preview: they’re an official part of the Java language now.

    I have picked Records because they are definitely the most favored feature added in Java 16, according to this Twitter poll by Java Champion Mala Gupta.

    Ashish Choudhary
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    • Java
    • Java in the Cloud

    How to Use Eclipse Transformer to Convert a 3rd Party Library to the New Jakarta Namespace

    The release of Jakarta EE 9 breaks a tradition of Java Enterprise. A legal requirement of the Java EE code donation from Oracle to the Eclipse Foundation is the change of the namespace of javax to jakarta.

    But the change of the package and XML namespace in Jakarta EE 9 is only the beginning. The change of the namespace allows for new development and functionality, but all frameworks and libraries using one of the Java Enterprise specifications also need to be adjusted to the new version.

    Jadon Ortlepp
    Rudy De Busscher
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