org.impalaframework.spring.dynamic.DynamicBeansProcessor.java Source code

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Here is the source code for org.impalaframework.spring.dynamic.DynamicBeansProcessor.java

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/*
 * Copyright 2007-2010 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.impalaframework.spring.dynamic;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.aop.framework.ProxyFactoryBean;
import org.springframework.aop.target.PrototypeTargetSource;
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.config.RuntimeBeanReference;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.RootBeanDefinition;

public class DynamicBeansProcessor implements BeanFactoryPostProcessor {

    private static final Log logger = LogFactory.getLog(DynamicBeansProcessor.class);

    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {

        String[] beanDefinitionNames = beanFactory.getBeanDefinitionNames().clone();
        for (String beanName : beanDefinitionNames) {
            BeanDefinition beanDefinition = beanFactory.getBeanDefinition(beanName);
            if (logger.isInfoEnabled())
                logger.info(beanName + ": " + beanDefinition.getScope());

            if (beanDefinition.getScope().equals("dynamic") && beanFactory instanceof BeanDefinitionRegistry) {

                final BeanDefinitionRegistry bdr = (BeanDefinitionRegistry) beanFactory;

                final String implBeanName = beanName + "Impl";
                final String targetSourceBeanName = beanName + "TargetSource";

                bdr.registerBeanDefinition(implBeanName, beanDefinition);

                /*
                 * <bean id="testInterface"
                 * class="org.springframework.aop.framework.ProxyFactoryBean">
                 * <property name="targetSource"> <bean
                 * class="org.impalaframework.spring.externalconfig.RefreshableTargetSourceFactoryBean">
                 * <property name="beanName" methodName = "testInterfaceImpl"/>
                 * </bean> </property> </bean>
                 */

                RootBeanDefinition targetSource = new RootBeanDefinition(PrototypeTargetSource.class);
                targetSource.getPropertyValues().addPropertyValue("targetBeanName", implBeanName);
                bdr.registerBeanDefinition(targetSourceBeanName, targetSource);

                RootBeanDefinition proxy = new RootBeanDefinition(ProxyFactoryBean.class);
                proxy.getPropertyValues().addPropertyValue("targetSource",
                        new RuntimeBeanReference(targetSourceBeanName));
                bdr.registerBeanDefinition(beanName, proxy);

            }
        }
    }

}