This Java/Gradle based repository illustrates a selection of Java-based microframeworks.

It implements a functionally identical grocery list application with Spark, Ninja, Ratpack and Jodd is meant as supplement for my article on heise developer online (german).

• Installed JDK 8+ with proper set JAVA_HOME environment variable

This repository comes with a pre-bundled Gradle Wrapper gradlew or gradlew.bat (Windows) which will download the appropriate build dependencies automatically on the first run.

Optional (recommended for development):

• Gradle 2.8+
• Lombok Plugin for your IDE of choice (Preferably: IntelliJ IDEA UE)
• IntelliJ IDEA (Ultimate Edition)

Spark is a tiny Sinatra inspired framework for creating web applications in Java 8 with minimal effort

Run the demo with gradle :spark:run and access http://localhost:8080/

Open the project using IntelliJ IDEA Ultimate and execute the Spark: Run Example run configuration.

Let gradle build the all-in-one UberJAR and directly execute it with Java (preferrably in the spark/ directory to leverage from the example grocerylists.json.

 gradlew :spark:shadowJar cd spark java -jar build/libs/spark-1.0-SNAPSHOT-all.jar 

Ninja is a opinionated, full stack framework including dependency injection, a optimized development mode and support for relational DBs.

Run the demo with gradle :ninja:run and access http://localhost:8080/ and http://localhost:8080/hello

Open the project using IntelliJ IDEA and execute the Ninja: Run Example run configuration.

Let gradle build the all-in-one UberJAR and directly execute it with Java (preferrably in the ninja/ directory to leverage from the example grocerylists.json.

 gradlew :ninja:shadowJar cd ninja java -jar build/libs/ninja-1.0-SNAPSHOT-all.jar 

Ratpack is a reactive-oriented, type-safe microframework heavily based on Java 8 lambdas and Netty for non-blocking IO.

Run the demo with gradle :ratpack:run and access http://localhost:5050/.

Open the project using IntelliJ IDEA and execute the Ninja: Run Example run configuration.

Let gradle build the all-in-one UberJAR and directly execute it with Java (preferrably in the ratpack/ directory to leverage from the example grocerylists.json.

 gradlew :ratpack:shadowJar cd ratpack java -jar build/libs/ratpack-1.0-SNAPSHOT-all.jar 

Jodd is set of Java micro frameworks, tools and utilities, under 1.5 MB. The framework consists of micro components, which can be used more or less independently.

Run the demo with cd jodd and gradle jettyRun and access http://http://localhost:8080/jodd/.

This example has no embedded servlet container bundled. To run you need to download a Jetty 8 container and use the commericial IntelliJ IDEA Ultimate edition. Open the project and configure the jodd: Run in Jetty run configuration. Check for a proper reference to a valid Jetty 8 installation under Application Server, then run the configuration.

This module does not provide a all-in-one UberJAR. Following how to build a WAR file:

 gradlew :jodd:war cp jodd/build/libs/jodd-1.0-SNAPSHOT.war [tomcat]/webapps