/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.tuscany.sca.implementation.spring.runtime.context;
import java.net.URL;
import java.util.List;
import org.apache.tuscany.sca.implementation.spring.processor.ComponentNameAnnotationProcessor;
import org.apache.tuscany.sca.implementation.spring.processor.ComponentStub;
import org.apache.tuscany.sca.implementation.spring.processor.ConstructorAnnotationProcessor;
import org.apache.tuscany.sca.implementation.spring.processor.InitDestroyAnnotationProcessor;
import org.apache.tuscany.sca.implementation.spring.processor.PropertyAnnotationProcessor;
import org.apache.tuscany.sca.implementation.spring.processor.PropertyValueStub;
import org.apache.tuscany.sca.implementation.spring.processor.ReferenceAnnotationProcessor;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.GenericApplicationContext;
import org.springframework.core.io.UrlResource;
/**
* This is the runtime side tie for the corresponding tuscany side stub class.
* It enables the Tuscany code to invoke methods on a Spring context without
* needing to know about any Spring classes. See the SpringContextStub class
* in the implementation-spring module for what the stub does.
*/
public class SpringContextTie {
private AbstractApplicationContext springContext;
private SpringImplementationStub implementation;
public SpringContextTie(SpringImplementationStub implementation, List<URL> resource) {
this.implementation = implementation;
SCAParentApplicationContext scaParentContext = new SCAParentApplicationContext(implementation);
springContext = createApplicationContext(scaParentContext, resource);
}
public void start() {
// Do refresh here to ensure that Spring Beans are not touched before the SCA config process is complete...
springContext.refresh();
springContext.start();
}
public void close() {
springContext.close();
if (springContext instanceof GenericApplicationContext) {
springContext.stop();
}
}
/**
* Include BeanPostProcessor to deal with SCA Annotations in Spring Bean
*/
private AbstractApplicationContext createApplicationContext(SCAParentApplicationContext scaParentContext, List<URL> resources) {
XmlBeanFactory beanFactory = null;
AbstractApplicationContext appContext = null;
if (resources.size() > 1) {
GenericApplicationContext appCtx =
new SCAGenericApplicationContext(scaParentContext, implementation.getClassLoader());
XmlBeanDefinitionReader xmlReader = new XmlBeanDefinitionReader(appCtx);
for (URL resource : resources) {
xmlReader.loadBeanDefinitions(new UrlResource(resource));
}
xmlReader.setBeanClassLoader(implementation.getClassLoader());
includeAnnotationProcessors(appCtx.getBeanFactory());
return appCtx;
}
// use the generic application context as default
beanFactory = new XmlBeanFactory(new UrlResource(resources.get(0)));
beanFactory.setBeanClassLoader(implementation.getClassLoader());
includeAnnotationProcessors(beanFactory);
appContext = new SCAGenericApplicationContext(beanFactory,
scaParentContext,
implementation.getClassLoader());
return appContext;
}
public Object getBean(String id) throws BeansException {
return springContext.getBean(id);
}
/**
* Include BeanPostProcessor to deal with SCA Annotations in Spring Bean
*/
private void includeAnnotationProcessors(ConfigurableListableBeanFactory beanFactory) {
// Processor to deal with @Init and @Destroy SCA Annotations
BeanPostProcessor initDestroyProcessor = new InitDestroyAnnotationProcessor();
beanFactory.addBeanPostProcessor(initDestroyProcessor);
// Processor to deal with @Reference SCA Annotations
ComponentStub component = new ComponentStub(implementation.getComponentTie());
BeanPostProcessor referenceProcessor = new ReferenceAnnotationProcessor(component);
beanFactory.addBeanPostProcessor(referenceProcessor);
// Processor to deal with @Property SCA Annotations
PropertyValueStub pvs = new PropertyValueStub(implementation.getPropertyValueTie());
BeanPostProcessor propertyProcessor = new PropertyAnnotationProcessor(pvs);
beanFactory.addBeanPostProcessor(propertyProcessor);
// Processor to deal with @ComponentName SCA Annotations
BeanPostProcessor componentNameProcessor = new ComponentNameAnnotationProcessor(implementation.getComponentName());
beanFactory.addBeanPostProcessor(componentNameProcessor);
// Processor to deal with @Constructor SCA Annotations
BeanPostProcessor constructorProcessor = new ConstructorAnnotationProcessor();
beanFactory.addBeanPostProcessor(constructorProcessor);
}
}