Payara Micro is the open-source, lightweight middleware platform of choice for containerized Java EE (Jakarta EE) microservices deployments. Less than 70MB in size, Payara Micro requires no installation or configuration and no need for code rewrites – so you can build and deploy a fully working app within minutes. Compatible with Eclipse MicroProfile, Payara Micro is the microservices-ready version of Payara Server. Building on the Java EE 7 support of its GlassFish 4.1 core, you can run war files from the command line without any application server installation. It is small, only 57MB in size, and incredibly simple to use. With its automatic and elastic clustering, it is designed for running Java EE applications in a modern containerized/virtualized infrastructure using automated provisioning tools like Chef, Ansible, or Puppet. As each Payara Micro server will automatically cluster with other servers on the network your Java EE application can be elastically scaled horizontally by adding and removing containers based on demand. Payara Micro also comes with a Java API to embed and launch from your own Java applications.

Eclipse MicroProfile is a specification for building microservices architecture. MicroProfile was derived from Jakarta EE, formerly Java EE, and thus allows developers to migrate and reuse their existing Java EE code seamlessly in modern microservice applications. It delivers the application portability of microservices across multiple MicroProfile vendor frameworks such as Payara Micro. Get Payara Micro: https://www.payara.fish/products/payara-micro/

Microservices

Cloud computing and microservices are changing the entire software industry. According to an O’Reilly survey, more than 30% of large enterprises have begun to use microservices. The main benefits for organizations are better feature flexibility, faster handling of changing business requirements, better overall scalability, and improved developer productivity. More than 80% of developers worldwide expect microservices to become the standard architecture in the next few years, but more than half do not have related skills. Our goal is to help Java developers get started with microservices and use them in production.

Java is changing radically: Traditional Java is not suited for the cloud

The way we used to build enterprise applications for 25 years is changing fundamentally. Apps must be easy to deploy, fail-safe, and scalable to run perfectly in the cloud and to minimize cloud costs – they must be cloud native. However, monolithic apps are not suited for that. To meet those requirements large applications must be divided into many single microservices. Microservices can be developed, tested, and deployed independently from each other, and run within their own container and JVM environment.

Unfortunately, the traditional application server approach and even the JVM are not suited for running containerized microservices. The JVM startup time is too slow and the memory footprint too high so traditional Java cannot keep pace with modern serverless functions. This is also true for traditional database programming and monolithic database servers.

New cloud-native Java technology stack

A new Java cloud-native technology stack is available that revolutionizes Java. There are 3 main game-changers:

1. Comparable to Java EE, there is a new standard called MicroProfile. Modern microservice frameworks implementing MicroProfile, enable you to build microservices and even serverless functions in good old powerful Java.
2. The revolutionary GraalVM lets you build native images: Java as fast as C, millisecond startup time, and minimal footprint.
3. MicroStream is a Java-native persistence that allows you to store any object graph or single subgraphs natively, which means without any mappings. The engine enables you to create Java in-memory database apps, microsecond query time, tremendous throughput and is predestined for microservices having their own persistence.

We help you to get started with microservices

Microservices come with a paradigm shift in architecture and if you want to develop state-of-the-art enterprise applications you must have microservices know-how. These courses will help you to learn how to develop highly efficient and powerful microservices in Java.