ApplicationListener与ApplicationContext的结合使用

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package com.frank.demo@Componentpublic class RegisterService {protected ApplicationContext getContext() {        return SpringSingletonUtil.getInstance().getApplicationContext();    }public LoginResult afterRegisterSuccess(int userId, String username, int usernameType, DeviceAdapt deviceAdapt) {        // 发布注册成功事件        RegisterSuccessEvent event = new RegisterSuccessEvent(this);        event.setUserId(userId);        if (usernameType == UsernameUtils.USERNAME_TYPE_MOBILE) {            username = "" + UsernameUtils.getMobile(username);// 返回普通手机号        }        event.setUsername(username);        event.setUsernameType(usernameType);        getContext().publishEvent(event);        deviceAdapt.setUserId(userId);        // 记录注册设备信息        registerInfoHome.recordDeviceInfo(deviceAdapt);        return loginService.loginAndRecord(deviceAdapt);    }}

RegisterService 代码如上

ApplicationContext的获取

package com.frank.demoimport org.springframework.beans.factory.BeanFactoryUtils;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.context.ApplicationContext;import org.springframework.stereotype.Component;/** * 协助实现spring单例模式,此类主要用于持有ApplicationContext引用 * @author  */@Componentpublic class SpringSingletonUtil {private static SpringSingletonUtil instance;@Autowiredprivate ApplicationContext context;private SpringSingletonUtil() {instance = this;}@SuppressWarnings("unchecked")public static <T> T getBean(Class<T> cls) {return (T)BeanFactoryUtils.beanOfType(instance.context, cls);}public static ApplicationContext getApplicationContext() {return instance.context;}/** * 单例模式 * @return * * @deprecated getBean(Class) */public static SpringSingletonUtil getInstance() {return instance;}}

Listener

package com.frank.demoimport org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.context.ApplicationEvent;import org.springframework.context.ApplicationListener;import org.springframework.stereotype.Component;/** *  * <pre> * 账户注册成功监听器 * </pre> */@Componentpublic class RegisterSuccessListener implements ApplicationListener {private static Logger logger = LoggerFactory.getLogger(RegisterSuccessListener.class);@Overridepublic void onApplicationEvent(ApplicationEvent event) {if (event instanceof RegisterSuccessEvent) {// Do something.}}}

Event

package com.frank.demo;import org.springframework.context.ApplicationEvent;/** *  *<pre> *注册成功事件 *</pre> */public class RegisterSuccessEvent extends ApplicationEvent {private static final long serialVersionUID = 1L;private int userId;private String username;private int type;/** * 登录名类型：1为手机号，2为邮箱地址 */public int getType() {return type;}public void setUsernameType(int type) {this.type = type;}public RegisterSuccessEvent(Object source) {super(source);}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public int getUserId() {return userId;}public void setUserId(int userId) {this.userId = userId;}@Overridepublic String toString() {final StringBuilder sb = new StringBuilder("RegisterSuccessEvent{");sb.append("userId=").append(userId);sb.append(", username='").append(username).append('\'');sb.append(", type=").append(type);sb.append('}');return sb.toString();}}

此项目使用了Spring的ApplicationListener的publish和lisener机制。  并且做了一个ApplicationContext的单例操作。 非常巧妙，使用了事件机制来实现应用功能。

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