A plugin is a way for a third party to extend the functionality of an application. A plugin implements extension points
declared by application or other plugins. Also a plugin can define extension points.
**NOTE:** Starting with version 0.9 you can define an extension directly in a jar (in classpath). See [WhazzupGreeting](https://github.com/decebals/pf4j/blob/master/demo/app/src/main/java/ro/fortsoft/pf4j/demo/WhazzupGreeting.java) for a real example.
**NOTE:** Starting with version 0.9 you can define an extension directly in the application jar (you're not obligated to put the extension in a plugin - you can see this extension as a default/system extension). See [WhazzupGreeting](https://github.com/decebals/pf4j/blob/master/demo/app/src/main/java/ro/fortsoft/pf4j/demo/WhazzupGreeting.java) for a real example.
Current build status: [![Build Status](https://buildhive.cloudbees.com/job/decebals/job/pf4j/badge/icon)](https://buildhive.cloudbees.com/job/decebals/job/pf4j/)