ro.fortsoft.pf4j.demo.Boot.java Source code

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Here is the source code for ro.fortsoft.pf4j.demo.Boot.java

Source

/*
 * Copyright 2012 Decebal Suiu
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License 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));
    }

}