ro.fortsoft.pf4j.spring.ExtensionsInjector.java Source code

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Here is the source code for ro.fortsoft.pf4j.spring.ExtensionsInjector.java

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/*
 * Copyright 2014 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.spring;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import ro.fortsoft.pf4j.PluginManager;
import ro.fortsoft.pf4j.PluginWrapper;

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

/**
 * @author Decebal Suiu
 */
public class ExtensionsInjector implements BeanFactoryPostProcessor, ApplicationContextAware {

    private static final Logger log = LoggerFactory.getLogger(ExtensionsInjector.class);

    private ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;
    }

    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
        BeanDefinitionRegistry registry = (BeanDefinitionRegistry) beanFactory;
        injectExtensions(registry);
    }

    private void injectExtensions(BeanDefinitionRegistry registry) {
        PluginManager pluginManager = applicationContext.getBean(PluginManager.class);
        List<PluginWrapper> startedPlugins = pluginManager.getStartedPlugins();
        for (PluginWrapper plugin : startedPlugins) {
            log.debug("Registering extensions of the plugin '{}' as beans", plugin.getPluginId());
            Set<String> extensionClassNames = pluginManager.getExtensionClassNames(plugin.getPluginId());
            for (String extensionClassName : extensionClassNames) {
                Class<?> extensionClass = null;
                try {
                    log.debug("Register extension '{}' as bean", extensionClassName);
                    extensionClass = plugin.getPluginClassLoader().loadClass(extensionClassName);
                    BeanDefinition definition = new RootBeanDefinition(extensionClass);
                    // optionally configure all bean properties, like scope, prototype/singleton, etc
                    registry.registerBeanDefinition(extensionClassName, definition);
                } catch (ClassNotFoundException e) {
                    log.error(e.getMessage(), e);
                }
            }
        }
    }

}