package com.smtservlet.core;

import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationListener;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.core.io.Resource;
import org.springframework.web.context.ContextLoader;
import org.springframework.web.context.WebApplicationContext;
import com.smtservlet.util.SMTMergeSpringXml;

/**
 * 系统启动时自动初始化SMTApp用的类 
 */
//@Component("BeanDefineConfigue")
public final class SMTWebStartup implements ApplicationListener<ContextRefreshedEvent> 
{
	@Override
	public void onApplicationEvent(ContextRefreshedEvent event) 
	{
		try
		{
			// 通过事件获取当前web context
			WebApplicationContext web = ContextLoader.getCurrentWebApplicationContext();
			if(web == null)
			{
				ApplicationContext app = event.getApplicationContext();
				if(app instanceof WebApplicationContext)
					web = (WebApplicationContext) event.getApplicationContext();
				if(web == null)
					return;
			}
			
			// 合并生成spring-config.xml
			Resource[] resources = web.getResources("classpath*:spring-config-*.xml");
			SMTMergeSpringXml merge = new SMTMergeSpringXml();
			for(Resource resource : resources)
			{
				merge.mergeXml(resource.getInputStream());
			}
			
			Resource rsMeageXML = merge.finishXML();
			
			// 通过当前yml设置，获取要动态加载的主程序的bean
			ConfigurableListableBeanFactory beanFactory=((ConfigurableApplicationContext) web).getBeanFactory();
			XmlBeanDefinitionReader xmlBeanDefinitionReader=new XmlBeanDefinitionReader((BeanDefinitionRegistry) beanFactory);
			xmlBeanDefinitionReader.loadBeanDefinitions(rsMeageXML);
			Object app = web.getBean("SMTApplication");
			
			// 启动app
			SMTApp.setThis((SMTApp)app);
			SMTApp.getThis().webStartup(web);
		}
		catch(Exception ex)
		{
			throw new RuntimeException(ex);
		}
	}

}