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Plugin Framework for Java (PF4J)
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PF4J Gradle Demo

This demo assumes that you know the basics of Gradle (Please look at gradle for more info)

Setup/Build

  1. Clone the repo
  2. Go to demo_gradle cd demo_gradle
  3. run gradle build
  • This will produce one jar, named app-plugin-demo-uberjar.jar, located in the app/build/libs/ directory and three plugins zips located in build/plugins directory.
  • The plugins are plugin-hello-plugin-0.0.1.zip, plugin-KotlinPlugin-1.0.0.zip and plugin-welcome-plugin-0.0.1.zip

Run the demo

  1. Run
 java -jar -Dpf4j.pluginsDir=build/plugins app/build/libs/app-plugin-demo-uberjar.jar
  • pf4j.pluginsDir: is where the plugins are located
  1. The demo's output should look similar to: (Please see Boot#main() for more details)
demo_gradle $ java -jar -Dpf4j.pluginsDir=build/plugins app/build/libs/app-plugin-demo-uberjar.jar 
[main] INFO org.pf4j.demo.Boot - ########################################
[main] INFO org.pf4j.demo.Boot -                PF4J-DEMO                
[main] INFO org.pf4j.demo.Boot - ########################################
[main] INFO org.pf4j.DefaultPluginStatusProvider - Enabled plugins: []
[main] INFO org.pf4j.DefaultPluginStatusProvider - Disabled plugins: []
[main] INFO org.pf4j.DefaultPluginManager - PF4J version 0.0.0 in 'deployment' mode
[main] INFO org.pf4j.AbstractPluginManager - Plugin 'welcome-plugin@0.0.1' resolved
[main] INFO org.pf4j.AbstractPluginManager - Plugin 'KotlinPlugin@1.0.0' resolved
[main] INFO org.pf4j.AbstractPluginManager - Plugin 'hello-plugin@0.0.1' resolved
[main] INFO org.pf4j.AbstractPluginManager - Start plugin 'welcome-plugin@0.0.1'
[main] INFO org.pf4j.demo.welcome.WelcomePlugin - WelcomePlugin.start()
[main] INFO org.pf4j.demo.welcome.WelcomePlugin - WELCOMEPLUGIN
[main] INFO org.pf4j.AbstractPluginManager - Start plugin 'KotlinPlugin@1.0.0'
[main] INFO org.pf4j.demo.kotlin.KotlinPlugin - KotlinPlugin.start()
[main] INFO org.pf4j.demo.kotlin.KotlinPlugin - KOTLINPLUGIN
[main] INFO org.pf4j.AbstractPluginManager - Start plugin 'hello-plugin@0.0.1'
[main] INFO org.pf4j.demo.hello.HelloPlugin - HelloPlugin.start()
[main] INFO org.pf4j.demo.Boot - Plugindirectory: 
[main] INFO org.pf4j.demo.Boot - 	build/plugins

[main] INFO org.pf4j.demo.Boot - Found 3 extensions for extension point 'org.pf4j.demo.api.Greeting'
[main] INFO org.pf4j.demo.Boot - >>> Whazzup
[main] INFO org.pf4j.demo.Boot - >>> Welcome
[main] INFO org.pf4j.demo.Boot - >>> Hello
[main] INFO org.pf4j.demo.Boot - Extensions added by plugin 'welcome-plugin':
[main] INFO org.pf4j.demo.Boot - Extensions added by plugin 'KotlinPlugin':
[main] INFO org.pf4j.demo.Boot - Extensions added by plugin 'hello-plugin':
[main] INFO org.pf4j.AbstractPluginManager - Stop plugin 'hello-plugin@0.0.1'
[main] INFO org.pf4j.demo.hello.HelloPlugin - HelloPlugin.stop()
[main] INFO org.pf4j.AbstractPluginManager - Stop plugin 'KotlinPlugin@1.0.0'
[main] INFO org.pf4j.demo.kotlin.KotlinPlugin - KotlinPlugin.stop()
[main] INFO org.pf4j.AbstractPluginManager - Stop plugin 'welcome-plugin@0.0.1'
[main] INFO org.pf4j.demo.welcome.WelcomePlugin - WelcomePlugin.stop()