Spring Event，贼好用的业务解耦神器！

import lombok.Data;import lombok.ToString;import org.springframework.context.ApplicationEvent;/** * @author Strive * @date 2022/4/22 18:00 * @description */@Data@ToStringpublic class OrderProductEvent extends ApplicationEvent {  /** 该类型事件携带的信息 */  private String orderId;
  public OrderProductEvent(Object source, String orderId) {    super(source);    this.orderId = orderId;  }}

import com.csp.mingyue.event.events.OrderProductEvent;import lombok.SneakyThrows;import lombok.extern.slf4j.Slf4j;import org.springframework.context.ApplicationListener;import org.springframework.stereotype.Component;/** * 实现 ApplicationListener 接口，并指定监听的事件类型 * * @author Strive * @date 2022/4/24 09:09 * @description */@Slf4j@Componentpublic class OrderProductListener implements ApplicationListener<OrderProductEvent> {  /** 使用 onApplicationEvent 方法对消息进行接收处理 */  @SneakyThrows  @Override  public void onApplicationEvent(OrderProductEvent event) {    String orderId = event.getOrderId();    long start = System.currentTimeMillis();    Thread.sleep(2000);    long end = System.currentTimeMillis();    log.info("{}：校验订单商品价格耗时：({})毫秒", orderId, (end - start));  }}

import com.csp.mingyue.event.events.OrderProductEvent;import lombok.RequiredArgsConstructor;import lombok.extern.slf4j.Slf4j;import org.springframework.context.ApplicationContext;import org.springframework.stereotype.Service;
/** * @author Strive * @date 2022/4/24 09:25 * @description */@Slf4j@Service@RequiredArgsConstructorpublic class OrderService {  /** 注入ApplicationContext用来发布事件 */  private final ApplicationContext applicationContext;  /**   * 下单   *   * @param orderId 订单ID   */  public String buyOrder(String orderId) {    long start = System.currentTimeMillis();    // 1.查询订单详情    // 2.检验订单价格 （同步处理）    applicationContext.publishEvent(new OrderProductEvent(this, orderId));    // 3.短信通知（异步处理）    long end = System.currentTimeMillis();    log.info("任务全部完成，总耗时：({})毫秒", end - start);    return "购买成功";  }}

import org.junit.jupiter.api.Test;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.test.context.SpringBootTest;
/** * @author Strive * @date 2022/4/24 09:28 * @description */@SpringBootTestpublic class OrderServiceTest {  @Autowired private OrderService orderService;
  @Test  public void buyOrderTest() {    orderService.buyOrder("732171109");  }}

2022-04-24 10:13:17.535  INFO 44272 --- [           main] c.c.m.e.listener.OrderProductListener    : 732171109：校验订单商品价格耗时：(2008)毫秒2022-04-24 10:13:17.536  INFO 44272 --- [           main] c.c.mingyue.event.service.OrderService   : 任务全部完成，总耗时：(2009)毫秒

import lombok.AllArgsConstructor;import lombok.Data;/** * @author Strive * @date 2022/4/24 10:18 * @description */@Data@AllArgsConstructorpublic class MsgEvent {
  /** 该类型事件携带的信息 */  public String orderId;}

import com.csp.mingyue.event.events.MsgEvent;import lombok.SneakyThrows;import lombok.extern.slf4j.Slf4j;import org.springframework.context.event.EventListener;import org.springframework.stereotype.Component;/** * @author Strive * @date 2022/4/24 10:20 * @description */@Slf4j@Componentpublic class MsgListener {
  @SneakyThrows  @EventListener(MsgEvent.class)  public void sendMsg(MsgEvent event) {    String orderId = event.getOrderId();    long start = System.currentTimeMillis();    log.info("开发发送短信");    log.info("开发发送邮件");    Thread.sleep(4000);    long end = System.currentTimeMillis();    log.info("{}：发送短信、邮件耗时：({})毫秒", orderId, (end - start));  }}

/**  * 下单  *  * @param orderId 订单ID  */public String buyOrder(String orderId) {    long start = System.currentTimeMillis();    // 1.查询订单详情
    // 2.检验订单价格 （同步处理）    applicationContext.publishEvent(new OrderProductEvent(this, orderId));
    // 3.短信通知（异步处理）    applicationContext.publishEvent(new MsgEvent(orderId));
    long end = System.currentTimeMillis();    log.info("任务全部完成，总耗时：({})毫秒", end - start);    return "购买成功";}

@Testpublic void buyOrderTest() {    orderService.buyOrder("732171109");}

2022-04-24 10:24:13.905  INFO 54848 --- [           main] c.c.m.e.listener.OrderProductListener    : 732171109：校验订单商品价格耗时：(2004)毫秒2022-04-24 10:24:13.906  INFO 54848 --- [           main] c.c.mingyue.event.listener.MsgListener   : 开发发送短信2022-04-24 10:24:13.907  INFO 54848 --- [           main] c.c.mingyue.event.listener.MsgListener   : 开发发送邮件2022-04-24 10:24:17.908  INFO 54848 --- [           main] c.c.mingyue.event.listener.MsgListener   : 732171109：发送短信、邮件耗时：(4002)毫秒2022-04-24 10:24:17.908  INFO 54848 --- [           main] c.c.mingyue.event.service.OrderService   : 任务全部完成，总耗时：(6008)毫秒

@EnableAsync@SpringBootApplicationpublic class MingYueSpringbootEventApplication {
  public static void main(String[] args) {    SpringApplication.run(MingYueSpringbootEventApplication.class, args);  }}

@Async@SneakyThrows@EventListener(MsgEvent.class)public void sendMsg(MsgEvent event) {    String orderId = event.getOrderId();    long start = System.currentTimeMillis();    log.info("开发发送短信");    log.info("开发发送邮件");    Thread.sleep(4000);    long end = System.currentTimeMillis();    log.info("{}：发送短信、邮件耗时：({})毫秒", orderId, (end - start));}

2022-04-24 10:30:59.002  INFO 59448 --- [           main] c.c.m.e.listener.OrderProductListener    : 732171109：校验订单商品价格耗时：(2009)毫秒2022-04-24 10:30:59.009  INFO 59448 --- [           main] c.c.mingyue.event.service.OrderService   : 任务全部完成，总耗时：(2017)毫秒2022-04-24 10:30:59.028  INFO 59448 --- [         task-1] c.c.mingyue.event.listener.MsgListener   : 开发发送短信2022-04-24 10:30:59.028  INFO 59448 --- [         task-1] c.c.mingyue.event.listener.MsgListener   : 开发发