网站充值如何做post的,如何做网站与网页,织梦网站更改,河南专业网站建设公司排名本文主要讲解mall整合RabbitMQ实现延迟消息的过程#xff0c;以发送延迟消息取消超时订单为例。项目使用框架介绍RabbitMQRabbitMQ是一个被广泛使用的开源消息队列。它是轻量级且易于部署的#xff0c;它能支持多种消息协议。RabbitMQ可以部署在分布式和联合配置中#xff0… 本文主要讲解mall整合RabbitMQ实现延迟消息的过程以发送延迟消息取消超时订单为例。项目使用框架介绍RabbitMQRabbitMQ是一个被广泛使用的开源消息队列。它是轻量级且易于部署的它能支持多种消息协议。RabbitMQ可以部署在分布式和联合配置中以满足高规模、高可用性的需求。RabbitMQ的安装和使用1.安装Erlang下载地址http://erlang.org/download/otpwin6421.3.exe2.安装RabbitMQ下载地址https://dl.bintray.com/rabbitmq/all/rabbitmq-server/3.7.14/rabbitmq-server-3.7.14.exe3.安装完成后进入RabbitMQ安装目录下的sbin目录4.在地址栏输入cmd并回车启动命令行然后输入以下命令启动管理功能rabbitmq-plugins enable rabbitmq_management5.访问地址查看是否安装成功http://localhost:15672/6.输入账号密码并登录guest guest7.创建帐号并设置其角色为管理员mall mall8.创建一个新的虚拟host为/mall9.点击mall用户进入用户配置页面10.给mall用户配置该虚拟host的权限11.至此RabbitMQ的安装和配置完成。RabbitMQ的消息模型标志中文名英文名描述P生产者Producer消息的发送者可以将消息发送到交换机C消费者Consumer消息的接收者从队列中获取消息进行消费X交换机Exchange接收生产者发送的消息并根据路由键发送给指定队列Q队列Queue存储从交换机发来的消息type交换机类型typedirect表示直接根据路由键(orange/black)发送消息LombokLombok为Java语言添加了非常有趣的附加功能你可以不用再为实体类手写getter,setter等方法通过一个注解即可拥有。注意需要安装idea的Lombok插件并在项目中的pom文件中添加依赖。业务场景说明用于解决用户下单以后订单超时如何取消订单的问题。用户进行下单操作(会有锁定商品库存、使用优惠券、积分一系列的操作)生成订单获取订单的id获取到设置的订单超时时间(假设设置的为60分钟不支付取消订单)按订单超时时间发送一个延迟消息给RabbitMQ让它在订单超时后触发取消订单的操作如果用户没有支付进行取消订单操作(释放锁定商品库存、返还优惠券、返回积分一系列操作)。整合RabbitMQ实现延迟消息在pom.xml中添加相关依赖 org.springframework.boot spring-boot-starter-amqp org.projectlombok lombok true修改SpringBoot配置文件修改application.yml文件在spring节点下添加Mongodb相关配置。 rabbitmq: host: localhost # rabbitmq的连接地址 port: 5672 # rabbitmq的连接端口号 virtual-host: /mall # rabbitmq的虚拟host username: mall # rabbitmq的用户名 password: mall # rabbitmq的密码 publisher-confirms: true #如果对异步消息需要回调必须设置为true添加消息队列的枚举配置类QueueEnum用于延迟消息队列及处理取消订单消息队列的常量定义包括交换机名称、队列名称、路由键名称。package com.macro.mall.tiny.dto;import lombok.Getter;/** * 消息队列枚举配置 * Created by macro on 2018/9/14. */Getterpublic enum QueueEnum { /** * 消息通知队列 */ QUEUE_ORDER_CANCEL(mall.order.direct, mall.order.cancel, mall.order.cancel), /** * 消息通知ttl队列 */ QUEUE_TTL_ORDER_CANCEL(mall.order.direct.ttl, mall.order.cancel.ttl, mall.order.cancel.ttl); /** * 交换名称 */ private String exchange; /** * 队列名称 */ private String name; /** * 路由键 */ private String routeKey; QueueEnum(String exchange, String name, String routeKey) { this.exchange exchange; this.name name; this.routeKey routeKey; }}添加RabbitMQ的配置用于配置交换机、队列及队列与交换机的绑定关系。package com.macro.mall.tiny.config;import com.macro.mall.tiny.dto.QueueEnum;import org.springframework.amqp.core.*;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;/** * 消息队列配置 * Created by macro on 2018/9/14. */Configurationpublic class RabbitMqConfig { /** * 订单消息实际消费队列所绑定的交换机 */ Bean DirectExchange orderDirect() { return (DirectExchange) ExchangeBuilder .directExchange(QueueEnum.QUEUE_ORDER_CANCEL.getExchange()) .durable(true) .build(); } /** * 订单延迟队列队列所绑定的交换机 */ Bean DirectExchange orderTtlDirect() { return (DirectExchange) ExchangeBuilder .directExchange(QueueEnum.QUEUE_TTL_ORDER_CANCEL.getExchange()) .durable(true) .build(); } /** * 订单实际消费队列 */ Bean public Queue orderQueue() { return new Queue(QueueEnum.QUEUE_ORDER_CANCEL.getName()); } /** * 订单延迟队列(死信队列) */ Bean public Queue orderTtlQueue() { return QueueBuilder .durable(QueueEnum.QUEUE_TTL_ORDER_CANCEL.getName()) .withArgument(x-dead-letter-exchange, QueueEnum.QUEUE_ORDER_CANCEL.getExchange())//到期后转发的交换机 .withArgument(x-dead-letter-routing-key, QueueEnum.QUEUE_ORDER_CANCEL.getRouteKey())//到期后转发的路由键 .build(); } /** * 将订单队列绑定到交换机 */ Bean Binding orderBinding(DirectExchange orderDirect,Queue orderQueue){ return BindingBuilder .bind(orderQueue) .to(orderDirect) .with(QueueEnum.QUEUE_ORDER_CANCEL.getRouteKey()); } /** * 将订单延迟队列绑定到交换机 */ Bean Binding orderTtlBinding(DirectExchange orderTtlDirect,Queue orderTtlQueue){ return BindingBuilder .bind(orderTtlQueue) .to(orderTtlDirect) .with(QueueEnum.QUEUE_TTL_ORDER_CANCEL.getRouteKey()); }}在RabbitMQ管理页面可以看到以下交换机和队列交换机及队列说明mall.order.direct(取消订单消息队列所绑定的交换机):绑定的队列为mall.order.cancel一旦有消息以mall.order.cancel为路由键发过来会发送到此队列。mall.order.direct.ttl(订单延迟消息队列所绑定的交换机):绑定的队列为mall.order.cancel.ttl一旦有消息以mall.order.cancel.ttl为路由键发送过来会转发到此队列并在此队列保存一定时间等到超时后会自动将消息发送到mall.order.cancel(取消订单消息消费队列)。添加延迟消息的发送者CancelOrderSender用于向订单延迟消息队列(mall.order.cancel.ttl)里发送消息。package com.macro.mall.tiny.component;import com.macro.mall.tiny.dto.QueueEnum;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.amqp.AmqpException;import org.springframework.amqp.core.AmqpTemplate;import org.springframework.amqp.core.Message;import org.springframework.amqp.core.MessagePostProcessor;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Component;/** * 取消订单消息的发出者 * Created by macro on 2018/9/14. */Componentpublic class CancelOrderSender { private static Logger LOGGER LoggerFactory.getLogger(CancelOrderSender.class); Autowired private AmqpTemplate amqpTemplate; public void sendMessage(Long orderId,final long delayTimes){ //给延迟队列发送消息 amqpTemplate.convertAndSend(QueueEnum.QUEUE_TTL_ORDER_CANCEL.getExchange(), QueueEnum.QUEUE_TTL_ORDER_CANCEL.getRouteKey(), orderId, new MessagePostProcessor() { Override public Message postProcessMessage(Message message) throws AmqpException { //给消息设置延迟毫秒值 message.getMessageProperties().setExpiration(String.valueOf(delayTimes)); return message; } }); LOGGER.info(send delay message orderId:{},orderId); }}添加取消订单消息的接收者CancelOrderReceiver用于从取消订单的消息队列(mall.order.cancel)里接收消息。package com.macro.mall.tiny.component;import com.macro.mall.tiny.service.OmsPortalOrderService;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.amqp.rabbit.annotation.RabbitHandler;import org.springframework.amqp.rabbit.annotation.RabbitListener;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Component;/** * 取消订单消息的处理者 * Created by macro on 2018/9/14. */ComponentRabbitListener(queues mall.order.cancel)public class CancelOrderReceiver { private static Logger LOGGER LoggerFactory.getLogger(CancelOrderReceiver.class); Autowired private OmsPortalOrderService portalOrderService; RabbitHandler public void handle(Long orderId){ LOGGER.info(receive delay message orderId:{},orderId); portalOrderService.cancelOrder(orderId); }}添加OmsPortalOrderService接口package com.macro.mall.tiny.service;import com.macro.mall.tiny.common.api.CommonResult;import com.macro.mall.tiny.dto.OrderParam;import org.springframework.transaction.annotation.Transactional;/** * 前台订单管理Service * Created by macro on 2018/8/30. */public interface OmsPortalOrderService { /** * 根据提交信息生成订单 */ Transactional CommonResult generateOrder(OrderParam orderParam); /** * 取消单个超时订单 */ Transactional void cancelOrder(Long orderId);}添加OmsPortalOrderService的实现类OmsPortalOrderServiceImplpackage com.macro.mall.tiny.service.impl;import com.macro.mall.tiny.common.api.CommonResult;import com.macro.mall.tiny.component.CancelOrderSender;import com.macro.mall.tiny.dto.OrderParam;import com.macro.mall.tiny.service.OmsPortalOrderService;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;/** * 前台订单管理Service * Created by macro on 2018/8/30. */Servicepublic class OmsPortalOrderServiceImpl implements OmsPortalOrderService { private static Logger LOGGER LoggerFactory.getLogger(OmsPortalOrderServiceImpl.class); Autowired private CancelOrderSender cancelOrderSender; Override public CommonResult generateOrder(OrderParam orderParam) { //todo 执行一系类下单操作具体参考mall项目 LOGGER.info(process generateOrder); //下单完成后开启一个延迟消息用于当用户没有付款时取消订单(orderId应该在下单后生成) sendDelayMessageCancelOrder(11L); return CommonResult.success(null, 下单成功); } Override public void cancelOrder(Long orderId) { //todo 执行一系类取消订单操作具体参考mall项目 LOGGER.info(process cancelOrder orderId:{},orderId); } private void sendDelayMessageCancelOrder(Long orderId) { //获取订单超时时间假设为60分钟 long delayTimes 30 * 1000; //发送延迟消息 cancelOrderSender.sendMessage(orderId, delayTimes); }}添加OmsPortalOrderController定义接口package com.macro.mall.tiny.controller;import com.macro.mall.tiny.dto.OrderParam;import com.macro.mall.tiny.service.OmsPortalOrderService;import io.swagger.annotations.Api;import io.swagger.annotations.ApiOperation;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestBody;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.ResponseBody;/** * 订单管理Controller * Created by macro on 2018/8/30. */ControllerApi(tags OmsPortalOrderController, description 订单管理)RequestMapping(/order)public class OmsPortalOrderController { Autowired private OmsPortalOrderService portalOrderService; ApiOperation(根据购物车信息生成订单) RequestMapping(value /generateOrder, method RequestMethod.POST) ResponseBody public Object generateOrder(RequestBody OrderParam orderParam) { return portalOrderService.generateOrder(orderParam); }}进行接口测试调用下单接口注意已经将延迟消息时间设置为30秒项目源码地址https://github.com/macrozheng/mall-learning/tree/master/mall-tiny-08
