/******************************************************************************
* Copyright (c) 2006, 2010 VMware Inc.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Apache License v2.0 which accompanies this distribution.
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html and the Apache License v2.0
* is available at http://www.opensource.org/licenses/apache2.0.php.
* You may elect to redistribute this code under either of these licenses.
*
* Contributors:
* VMware Inc.
*****************************************************************************/
package org.eclipse.gemini.blueprint.service.dependency.internal;
import org.eclipse.gemini.blueprint.service.exporter.support.OsgiServiceFactoryBean;
import org.eclipse.gemini.blueprint.service.exporter.support.internal.controller.ExporterControllerUtils;
import org.eclipse.gemini.blueprint.service.exporter.support.internal.controller.ExporterInternalActions;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.beans.factory.config.DestructionAwareBeanPostProcessor;
/**
* BeanPostProcessor registered for detecting the dependency between service importer and service exporters. Besides
* bean detection, this component also listens to specific importer events to determine whether a potential associated
* exporter needs to be disabled temporarily.
*
* @author Costin Leau
*
*/
public class MandatoryDependencyBeanPostProcessor implements BeanFactoryAware, BeanPostProcessor,
DestructionAwareBeanPostProcessor {
private MandatoryServiceDependencyManager manager;
private ConfigurableBeanFactory beanFactory;
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
if (bean instanceof OsgiServiceFactoryBean && beanFactory.containsLocalBean(beanName)) {
manager.addServiceExporter(bean, beanName);
}
return bean;
}
public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
// disable publication until all the dependencies have been fulfilled
// ignore inner beans
if (bean instanceof OsgiServiceFactoryBean && beanFactory.containsLocalBean(beanName)) {
String exporterName = beanName;
if (beanFactory.isFactoryBean(beanName)) {
exporterName = BeanFactory.FACTORY_BEAN_PREFIX + beanName;
}
// if it's a singleton, then disable publication, otherwise ignore it
if (beanFactory.isSingleton(exporterName)) {
// get controller
ExporterInternalActions controller = ExporterControllerUtils.getControllerFor(bean);
controller.registerServiceAtStartup(false);
}
}
return bean;
}
public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
DefaultMandatoryDependencyManager manager = new DefaultMandatoryDependencyManager();
manager.setBeanFactory(beanFactory);
this.manager = manager;
this.beanFactory = (ConfigurableBeanFactory) beanFactory;
}
public void postProcessBeforeDestruction(Object bean, String beanName) throws BeansException {
if (bean instanceof OsgiServiceFactoryBean && beanFactory.containsLocalBean(beanName)) {
manager.removeServiceExporter(bean, beanName);
}
}
}