JLP - Java Lightweight Plugins

JLP is a plugin framework for Java applications.

Features:

simple usage
small core (just 346 lines of code)
no dependency on other libraries
no configuration files
plugins as JARs or built in other JARs
auto-discovery of plugins in ./plugins folder
plugins are collections of extensions
extensions as POJOs, extension points as interfaces or abstract classes
declare extension point just by creating a interface or abstract class
declare extension just by creating a POJO class implementing an extension point (no other dependency declaration needed)
support to declare ordering of extensions relative to others using annotations (@After, @Before), handy e.g. for menu items
no explicit versioning. Just pick different class/interface name for backwards incompatible extension point.

Demo: package net.matmas.demoeditor

Example of usage:

public interface FooBarExtensionPoint {
    public String getName();
}

public class Bar implements FooBarExtensionPoint {
    public String getName() {
        return "Bar";
    }
}

@Before({Bar.class})
public class Foo implements FooBarExtensionPoint {
    public String getName() {
        return "Foo";
    }
}

public class Main implements BasicExtensionPoint {
    public Main() {
        for (FooBarExtensionPoint extension : ExtensionManager.getAllExtensions(FooBarExtensionPoint.class)) {
            System.out.println(extension.getName());
        }
        // for getting application arguments use ExtensionManager.getApplicationArguments()
    }
}

Output of previous example:

Foo
Bar

Code license: BSD

matmas/jlp

JLP - Java Lightweight Plugins