JMS解决系统间通信问题

最近在给公司项目做二次重构，将原来庞大的系统拆分成几个小系统，系统与系统之间通过接口调用，系统间通信有很多方式，如系统间通信接口做成请求controller，不过这样不方便也不安全，常用的方式是使用rpc技术，可以使用webservices技术等等，由于我的架构是使用spring，而且spring在集成这块做的很不错，如hessian，blurp，webservices，httpinvoke，rmi,jms等，我这里采用的是jms技术。废话不多说间代码。

场景描述：A系统需要调用B系统提供的接口

1、B系统提供的接口

a、创建接口

package com.maimai.test.jmsservice;import com.maimai.db_bean.User;public interface AlertService {public String sendStr(String str);public void print_r(String str);public User findById(long id);}

b、创建接口实现类

package com.maimai.test.jmsservice;import org.springframework.beans.factory.annotation.Autowired;import com.maimai.dao.UserDao;import com.maimai.db_bean.User;public class AlertServiceImpl implements AlertService {@Autowiredprivate UserDao userDao;public String sendStr(final String str) {System.out.println("========收到的信息======"+str+"================");return "来自服务端的返回信息，我接收到数据了 ...";}public void print_r(String str){System.out.println("========收到的信息======"+str+"================");}public User findById(long id) {User user = userDao.findById(id);return user;}}

c、配置amq和jms

amq配置

<amq:connectionFactory id="connectionFactory" brokerURL="tcp://localhost:61616" /><amq:queue id="queue" physicalName="mail.queue"></amq:queue>

jms配置

<jms:listener-container connection-factory="connectionFactory"><jms:listener destination="mail.queue" ref="jmsreciever" method="getStr"/><jms:listener destination="couponMessage.queue" ref="jsmRecieveMessage" method="receiveJMSMessage"/><jms:listener destination="spitter.alert.queue" ref="alertServiceExporter"/></jms:listener-container>

//备注这里只需要destination="spitter.alert.queue"

d、将接口导出成jms服务配置

<bean id="alertServiceExporter" class="org.springframework.jms.remoting.JmsInvokerServiceExporter" p:service-ref="alertService" p:serviceInterface="com.maimai.test.jmsservice.AlertService"/><bean id="alertService" class="com.maimai.test.jmsservice.AlertServiceImpl"/>

备注：此刻B系统提供接口准备工作做完了，接下来是A系统的工作

2、A系统调用B系统提供的服务

a、将B系统中接口所在包复制到A系统中，或者将B系统接口打包jar导入到A系统中

备注：只需要将com.maimai.test.jmsservice.AlertService这个复制过来即可，不需要实现类

b、在A系统中配置amq

配置amq

<amq:connectionFactory id="connectionFactory" brokerURL="tcp://localhost:61616" /><amq:queue id="alertServiceQueue" physicalName="spitter.alert.queue"></amq:queue>

配置jms工厂

<bean id="alertService" class="org.springframework.jms.remoting.JmsInvokerProxyFactoryBean" ><property name="connectionFactory" ref="connectionFactory" /><property name="queueName" value="spitter.alert.queue" /><property name="serviceInterface" value="com.maimai.test.jmsservice.AlertService"></property></bean>

备注：到此，我们都已经配置好了，接下来是A系统开始调用B系统提供的接口服务

package com.maimai.action;import java.io.UnsupportedEncodingException;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import javax.servlet.http.HttpServletRequest;import org.apache.struts2.interceptor.ServletRequestAware;import org.springframework.beans.factory.annotation.Autowired;import com.maimai.db_bean.Product;import com.maimai.db_bean.ProductBrand;import com.maimai.db_bean.ProductCategory;import com.maimai.db_bean.ProductCommentRecord;import com.maimai.db_bean.ProductDetail;import com.maimai.db_bean.ProductLimitedTime;import com.maimai.db_bean.ProductType;import com.maimai.db_bean.ScannedProduct;import com.maimai.db_bean.User;import com.maimai.db_bean.HotProduct;import com.maimai.db_bean.UserShop;import com.maimai.engine.AfterSaleEngine;import com.maimai.engine.DealEngine;import com.maimai.engine.ProductEngine;import com.maimai.engine.UserEngine;import com.maimai.service.UserShopService;import com.maimai.test.jmsservice.AlertService;import com.maimai.util.Constant;import com.maimai.util.IKAnalyzerUtil;import com.maimai.util.Util;import com.opensymphony.xwork2.ActionSupport;/** * 商品Action * */public class ProductAction extends ActionSupport implements ServletRequestAware {/** * 序列号 */private static final long serialVersionUID = 495219298210322438L;private HttpServletRequest request;// 商品engine@Autowiredprivate ProductEngine productEngine; // 用户engine@Autowiredprivate UserEngine userEngine;// 交易Engine@Autowiredprivate DealEngine dealEngine;// 售后服务Engine@Autowiredprivate AfterSaleEngine afterSaleEngine;@Autowiredprivate UserShopService userShopService;@AutowiredAlertService alertService;  /************ * 进入商品详细页 * */public String ToProductDetail(){// 获取商品idString str = this.alertService.sendStr("你好，中国"); //调用B系统接口System.out.println("=================="+str+"====================");this.alertService.print_r("你好，哈哈哈，成功了!!!!");   <span style="font-family: Arial, Helvetica, sans-serif;">//调用B系统接口</span>User user1 = this.alertService.findById(10);    <span style="font-family: Arial, Helvetica, sans-serif;">//调用B系统接口</span>System.out.println(user1.toString());long productId = Long.parseLong(this.request.getParameter("pid"));// 根据id获取商品Product product = this.productEngine.getProductById(productId);if (Util.isNullOrEmpty(product)) {return "ProductError";}this.request.setAttribute("product", product);//added by sam 店铺查询UserShop userShop = new UserShop();if(product.getUserId() != 0 ){userShop = this.userShopService.findByUserId(product.getUserId());}this.request.setAttribute("userShop", userShop);//ended by sam// 根据商品所属分类id获取商品列表List<Product> sameCategoryProducts = this.productEngine.getProductsByCategoryId(product.getCategoryId(), 1, 5);this.request.setAttribute("sameCategoryProducts", sameCategoryProducts);/** 记录浏览了此商品 **/try {// 获取当前登录用户User user = this.userEngine.getCurrentuser();ScannedProduct scannedProduct = new ScannedProduct();scannedProduct.setProductId(productId);scannedProduct.setUserId(user.getId());this.productEngine.getProductService().saveScannedProduct(scannedProduct);} catch (Exception e) {//e.printStackTrace();}return "ToProductDetail";}}

A系统调用B系统成功信息如下：

 ========收到的信息======你好，中国================
2015-12-31 09:35:52,261 [org.springframework.jms.listener.DefaultMessageListenerContainer#2-2] DEBUG [org.springframework.remoting.support.RemoteInvocationTraceInterceptor] - Finished processing of JmsInvokerServiceExporter remote call: com.maimai.test.jmsservice.AlertService.sendStr
 ==================来自服务端的返回信息，我接收到数据了 ...====================

2015-12-31 09:35:52,332 [org.springframework.jms.listener.DefaultMessageListenerContainer#2-2] DEBUG [org.springframework.jms.listener.DefaultMessageListenerContainer] - Received message of type [class org.apache.activemq.command.ActiveMQObjectMessage] from consumer [ActiveMQMessageConsumer { value=ID:PC-20150906SEWA-53438-1451525683864-0:21:1:1, started=true }] of session [ActiveMQSession {id=ID:PC-20150906SEWA-53438-1451525683864-0:21:1,started=true}]
 2015-12-31 09:35:52,333 [org.springframework.jms.listener.DefaultMessageListenerContainer#2-2] DEBUG [org.springframework.remoting.support.RemoteInvocationTraceInterceptor] - Incoming JmsInvokerServiceExporter remote call: com.maimai.test.jmsservice.AlertService.print_r
 ========收到的信息======你好，哈哈哈，成功了!!!!================

 2015-12-31 09:35:52,606 [org.springframework.jms.listener.DefaultMessageListenerContainer#2-2] DEBUG [org.springframework.remoting.support.RemoteInvocationTraceInterceptor] - Finished processing of JmsInvokerServiceExporter remote call: com.maimai.test.jmsservice.AlertService.findById
 User [accountImage=sysImg/user/10/account/account20150810170819.jpg, age=12, email=[e-mail], idCode=34081119, idImageBack=sysImg/user/id/11510411712110199104971114953514853535448575448/11510411712110199104971114953514853535448575448Back.jpg, idImageFore=sysImg/user/id/11510411712110199104971114953514853535448575448/11510411712110199104971114953514853535448575448Fore.png, isLocked=0, loginName=samtest, password=`O怾,u?攠聉?, qq=526713869, realName=张三, registTime=2015-01-26 09:56:04, sex=f, userType=0, telNum=15305560960, status=0]