The FF Project

FF or the Framework Frenzy, Framework Face-off, Framework Fireworks, or ... the comparison and similarities between Jakarta EE Web Profile, Spring Boot, Quarkus, Kotlin Ktor, and a few others regarding creating backend applications with REST endpoints.

Start up

A comparison between the start up time (time until first request is handled), memory usage and application size of various frameworks. The application had 3 endpoints, a hello world endpoint returning a String, an endpoint return a JSON string serialised from an object instance, and a POST endpoint processing a JSON (and returning a String)

Data gathering is done using a Python script.

See the directory startup-time readme for the details.

Frameworks

• Spring Boot 3
• Quarkus 2.16
• Ktor
• HttpServer from Java
• Payara 6
• OpenLiberty
• Wildly 27
• Helidon 3.1
• Piranha
• Micronaut

Ktor for Jakarta EE Developers

A series of examples with Kotlin Ktor for the Jakarta EE developers.

See also blogs : Coming soon

Equivalent of JAX-RS, JSON-B and JSON-P

Example of defining routing and using JSON payloads utilizing similar functionality as JSON-B and JSON-P.

See also blog : Why don’t you create your next Backed-end application with Kotlin and Ktor?

JWT usage with Keycloak

Rest endpoints using authentication/authorization based on JWT token from Keycloak in header.

Application with

• Payara 6 and MicroProfile 6
• Atbash Runtime (with and without Jakarta Runner feature)
• Spring Boot 3
• Quarkus 3
• Ktor

Directory keycloak contains the info and scripts to setup and configure Keycloak and test out the application on each runtime.

• See commands.txt for the start of Keycloak as Docker container
• See commands.txt for the setup of a Python environment
• python scripts to setup Keycloak and test the application endpoints.