pf4j/demo_gradle/app/src/main/java/ro/fortsoft/pf4j/demo/Boot.java

/*
 * Copyright 2012 Decebal Suiu
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
 * the License. You may obtain a copy of the License in the LICENSE file, or at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 */
package ro.fortsoft.pf4j.demo;

import java.util.List;
import java.util.Set;

import org.apache.commons.lang3.StringUtils;

import ro.fortsoft.pf4j.DefaultPluginManager;
import ro.fortsoft.pf4j.PluginManager;
import ro.fortsoft.pf4j.PluginWrapper;
import ro.fortsoft.pf4j.demo.api.Greeting;

/**
 * A boot class that start the demo.
 *
 * @author Decebal Suiu
 */
public class Boot {

    public static void main(String[] args) {
        // print logo
        printLogo();

        // create the plugin manager
        final PluginManager pluginManager = new DefaultPluginManager();

        // load the plugins
        pluginManager.loadPlugins();

        // enable a disabled plugin
//        pluginManager.enablePlugin("welcome-plugin");

        // start (active/resolved) the plugins
        pluginManager.startPlugins();

        System.out.println("Plugindirectory: ");
        System.out.println("\t" + System.getProperty("pf4j.pluginsDir", "plugins") + "\n");

        // retrieves the extensions for Greeting extension point
        List<Greeting> greetings = pluginManager.getExtensions(Greeting.class);
        System.out.println(String.format("Found %d extensions for extension point '%s'", greetings.size(), Greeting.class.getName()));
        for (Greeting greeting : greetings) {
            System.out.println(">>> " + greeting.getGreeting());
        }

        // // print extensions from classpath (non plugin)
        // System.out.println(String.format("Extensions added by classpath:"));
        // Set<String> extensionClassNames = pluginManager.getExtensionClassNames(null);
        // for (String extension : extensionClassNames) {
        //     System.out.println("   " + extension);
        // }

        // print extensions for each started plugin
        List<PluginWrapper> startedPlugins = pluginManager.getStartedPlugins();
        for (PluginWrapper plugin : startedPlugins) {
            String pluginId = plugin.getDescriptor().getPluginId();
            System.out.println(String.format("Extensions added by plugin '%s':", pluginId));
            // extensionClassNames = pluginManager.getExtensionClassNames(pluginId);
            // for (String extension : extensionClassNames) {
            //     System.out.println("   " + extension);
            // }
        }

        // stop the plugins
        pluginManager.stopPlugins();
        /*
        Runtime.getRuntime().addShutdownHook(new Thread() {

			@Override
			public void run() {
				pluginManager.stopPlugins();
			}

        });
        */
    }

	private static void printLogo() {
    	System.out.println(StringUtils.repeat("#", 40));
    	System.out.println(StringUtils.center("PF4J-DEMO", 40));
    	System.out.println(StringUtils.repeat("#", 40));
	}

}