A lightweight open-source microservice framework. Develop microservices with Java EE technologies. Migrate existing Java EE applications to microservices and cloud-native architecture.

KumuluzEE is the Java Duke's Choice Award Winner

KumuluzEE has won the prestigious 2015 Java Duke's Choice Award. The Duke's Choice Award is the Java community equivalent of winning an Oscar. The award celebrates extreme innovation using Java technology. The primary judging criteria for this prestigious award is innovation, putting small developer shops on equal footing with global giants. Java Duke's Choice Award winners are recognition as an elite member of the Java ecosystem. Previous award winners include Hadoop, Jenkins, TomEE, and several other well-known products.

What people are saying about KumuluzEE

KumuluzEE is a great community effort to power Java EE API based microservices, especially on the cloud.

~ Reza Rahman, Senior Java Technologist, Author, Speaker

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Example code

public class OrdersResource {

    @PersistenceContext(unitName = "books")
    private EntityManager em;

    public Response getOrder(@PathParam("id") Integer id) {

        BookOrder o = em.find(BookOrder.class, id);

        if (o == null)
            return Response.status(Response.Status.NOT_FOUND).build();

        return Response.ok(o).build();



    <!-- MicroProfile 1.0 -->


What is KumuluzEE

KumuluzEE is a lightweight framework for developing microservices using standard Java EE technologies and migrating existing Java EE applications to microservices. KumuluzEE packages microservices as standalone JARs. KumuluzEE microservices are lightweight and optimized for size and start-up time. They fit perfectly with Docker containers.

KumuluzEE also provides extensions for developing common patterns in cloud-native architectures, including configuration, logging, discovery, circuit-breakers, metrics, security, event streaming and more.

KumuluzEE microservice framework

For creating microservices using JavaEE

KumuluzEE REST Patterns

For implementation of common, advanced and flexible REST API functionalities

KumuluzEE Config

Config for configuration (using ENV variables and/or config server, such as etcd or Consul)

KumuluzEE Logs

For advanced microservice framework for logging

KumuluzEE Discovery

For service discovery (etcd or Consul)

KumuluzEE Metrics

For easy collection and reporting of performance metrics

KumuluzEE OAuth2

For easy integration with OAuth2/OpenID identity and access managemant providers

KumuluzEE Circuit Breaker

For implementing circuit breakers and decoupling microservices

KumuluzEE Kafka

For event streaming support using Apache Kafka

KumuluzEE REST Blockchain

For Blockchain-enabled REST services

Coming soon

Microservices with Java EE

A standard approach for deploying Java EE applications is packing all components into a single EAR/WAR archive and deploying the archive on the application server. This leads to monolithic architectures which make applications difficult to maintain and scale in cloud (PaaS) environments. The microservice architecture addresses these shortcomings by decomposing an application into a set of stateless microservices. Each microservice has a well-defined functionality and an interface for communication with other services.

Why KumuluzEE

  • Allows you to develop microservices using standard Java EE technologies.
  • Allows you to gradually migrate existing Java EE applications to microservices and cloud-native architecture.
  • Zero lock-in. KumuluzEE does not require any specific code. Everything is configured in pom.xml
  • Develop and build microservices as stand-alone JARs with minimal footprint.
  • Leverage your existing Java EE knowledge and extend it to cloud-native architecture.
  • Extend your microservices with common cloud-native patterns, such as config, discovery, logging, circuit-breakres, etc. KumuluzEE provides all the building blocks.
  • Have complete control over Java EE components.
  • KumuluzEE is fully integrated with KumuluzAPI, an innovative microservice API Management and other products for the Kumuluz family.

They trust us

Oesterreichische Sozialversicherung, Austria
EBCONT group GmbH, Austria
Cybergrid, Austria
Everis, Chile
Adriatic Slovenica
Energetika Ljubljana
Government - Ministry of Public Administration
Goverment - Ministry of Justice
Poštna banka Slovenije
MM turist
Solvera Lynx
IRC Celje
Informatika d.d.
Tovarna podjemov

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