StartupBeanExtension.java

/*
 * Copyright 2013 JBoss Inc
 *
 * 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 org.overlord.rtgov.ui.server.cdi;

import java.util.LinkedHashSet;
import java.util.Set;

import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.event.Observes;
import javax.enterprise.inject.spi.AfterDeploymentValidation;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.Extension;
import javax.enterprise.inject.spi.ProcessBean;

/**
 * 
 * @author eric.wittmann@redhat.com
 */
public class StartupBeanExtension implements Extension {
	private final Set<Bean<?>> startupBeans = new LinkedHashSet<Bean<?>>();

	<X> void processBean(@Observes ProcessBean<X> event) {
		if (event.getAnnotated().isAnnotationPresent(Startup.class)
		        && event.getAnnotated().isAnnotationPresent(ApplicationScoped.class)) {
			startupBeans.add(event.getBean());
		}
	}

	void afterDeploymentValidation(@Observes AfterDeploymentValidation event, BeanManager manager) {
		for (Bean<?> bean : startupBeans) {
			// the call to toString() is a cheat to force the bean to be
			// initialized
			manager.getReference(bean, bean.getBeanClass(), manager.createCreationalContext(bean)).toString();
		}
	}
}