JMS解決系統間通信問題
近期在給公司項目做二次重構，將原來龐大的系統拆分成幾個小系統。系統與系統之間通過接口調用，系統間通信有非常多方式，如系統間通信接口做成請求controller，只是這樣不方便也不安全，經常使用的方式是使用rpc技術，能夠使用webservices技術等等。因為我的架構是使用spring，並且spring在集成這塊做的非常不錯。如hessian，blurp，webservices。httpinvoke，rmi,jms等，我這裏採用的是jms技術。
廢話不多說間代碼。
場景描寫敘述：A系統須要調用B系統提供的接口
1、B系統提供的接口
a、創建接口
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、創建接口實現類
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 {
@Autowired
private UserDao userDao;
public String sendStr(final String str) {
System.out.println("========收到的信息======"+str+"================");
return "來自服務端的返回信息，我接收到數據了 ...";
}
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;
}
}
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>
//備註這裏僅僅須要destination="spitter.alert.queue"
d、將接口導出成jms服務配置
<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"/>
備註：此刻B系統提供接口準備工作做完了，接下來是A系統的工作
2、A系統調用B系統提供的服務
a、將B系統中接口所在包拷貝到A系統中。或者將B系統接口打包jar導入到A系統中
備註：僅僅須要將com.maimai.test.jmsservice.AlertService這個復制過來就可以，不須要實現類
b、在A系統中配置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工廠
<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>
備註：到此，我們都已經配置好了，接下來是A系統開始調用B系統提供的接口服務
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 {
/**
* 序列號
*/
private static final long serialVersionUID = 495219298210322438L;
private HttpServletRequest request;
// 商品engine
@Autowired
private ProductEngine productEngine;
// 用戶engine
@Autowired
private UserEngine userEngine;
// 交易Engine
@Autowired
private DealEngine dealEngine;
// 售後服務Engine
@Autowired
private AfterSaleEngine afterSaleEngine;
@Autowired
private UserShopService userShopService;
@Autowired
AlertService alertService;
/************
* 進入商品具體頁
* */
public String ToProductDetail(){
// 獲取商品id
String str = this.alertService.sendStr("你好，中國"); //調用B系統接口
System.out.println("=================="+str+"====================");
this.alertService.print_r("你好，哈哈哈。成功了!!!!"); <span style="font-family: Arial, Helvetica, sans-serif;">//調用B系統接口</span>
User user1 = this.alertService.findById(10); <span style="font-family: Arial, Helvetica, sans-serif;">//調用B系統接口</span>
System.out.println(user1.toString());
long productId = Long.parseLong(this.request.getParameter("pid"));
// 依據id獲取商品
Product product = this.productEngine.getProductById(productId);
if (Util.isNullOrEmpty(product)) {
return "ProductError";
}
this.request.setAttribute("product", product);
//added by sam 店鋪查詢
UserShop userShop = new UserShop();
if(product.getUserId() != 0 ){
userShop = this.userShopService.findByUserId(product.getUserId());
}
this.request.setAttribute("userShop", userShop);
//ended by sam
// 依據商品所屬分類id獲取商品列表
List<Product> sameCategoryProducts = this.productEngine.getProductsByCategoryId(product.getCategoryId(), 1, 5);
this.request.setAttribute("sameCategoryProducts", sameCategoryProducts);
/** 記錄瀏覽了此商品 **/
try {
// 獲取當前登錄用戶
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系統調用B系統成功信息例如以下：
========收到的信息======你好，中國================
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
==================來自服務端的返回信息。我接收到數據了 ...====================
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 protected], 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=張三, registTime=2015-01-26 09:56:04, sex=f, userType=0, telNum=15305560960, status=0]
JMS解決系統間通信問題