/*
* Copyright 2006-2008 the original author or authors.
*
* 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.springframework.osgi.service.dependency.internal;
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;
import org.springframework.osgi.service.exporter.support.OsgiServiceFactoryBean;
import org.springframework.osgi.service.exporter.support.internal.controller.ExporterInternalActions;
import org.springframework.osgi.service.exporter.support.internal.controller.ExporterControllerUtils;
/**
* 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) {
manager.addServiceExporter(bean, beanName);
}
return bean;
}
public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
// disable publication until all the dependencies have been fulfilled
if (bean instanceof OsgiServiceFactoryBean) {
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) {
manager.removeServiceExporter(bean, beanName);
}
}
}