有两个服务器类,需要SpringContext在InitAfterSpringContextService之前初始化:
1、SpringContext
spring容器的上线文环境
package com.cdelabcare.pubservice;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Service;
/**
* Spring上下文环境
*/
@Service
public class SpringContext implements ApplicationContextAware {
/** Spring应用上下文环境 */
private static ApplicationContext applicationContext;
/**
* 实现ApplicationContextAware接口的回调方法,设置上下文环境
* <pre>
* 当spring容器加载完后会触发该方法
* </pre>
* @param applicationContext {@link ApplicationContext}
* @throws BeansException
*/
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
SpringContext.applicationContext = applicationContext;
}
/**
* @return ApplicationContext
*/
public static ApplicationContext getApplicationContext() {
return applicationContext;
}
/**
* 获取对象
*
* @param name
* @return Object 一个以所给名字注册的bean的实例
* @throws BeansException
*/
public static Object getBean(String name) throws BeansException {
return applicationContext.getBean(name);
}
/**
* 获取类型为requiredType的对象
* 如果bean不能被类型转换,相应的异常将会被抛出(BeanNotOfRequiredTypeException)
*
* @param name
* bean注册名
* @param requiredType
* 返回对象类型
* @return Object 返回requiredType类型对象
* @throws BeansException
*/
public static <T> T getBean(String name, Class<T> requiredType) throws BeansException {
return applicationContext.getBean(name, requiredType);
}
}
2、InitAfterSpringContextService
在Spring初始化完成之后执行一些初始化任务(需要在SpringContext执行完成之后执行)
package com.cdelabcare.service.serviceutil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationListener;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.stereotype.Service;
import com.cdelabcare.pubservice.SpringContext;
/**
* 初始化Spring完成之后的操作
* @create pengjunhao
* @createDate 2016年6月16日 上午10:06:11
* @update
* @updateDate
*/
@Service
public class InitAfterSpringContextService implements ApplicationListener<ContextRefreshedEvent> {
/** 日志 */
private static final Logger LOGGER = LoggerFactory
.getLogger(InitAfterSpringContextService.class);
/** 引入SpringContext的依赖,主要为了让SpringContext优先加载 */
@Autowired
private SpringContext springContext;
/*
* 监听事件
* @see org.springframework.context.ApplicationListener#onApplicationEvent(org.springframework.context.ApplicationEvent)
*/
@Override
public void onApplicationEvent(ContextRefreshedEvent event) {
//root application context 没有parent
if (event.getApplicationContext().getParent() == null) {
LOGGER.info("【初始化事务....】");
// TODO something
}
}
}
通过使用implements ApplicationListener<ContextRefreshedEvent>可以监听spring容器是否初始化完成。