XFire 应用

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XFire 应用

唐玄奘 2017-12-04 14:13:00 浏览650
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  介绍:
          面向服务架构(SOA,Services-oriented architecture)和Web Services已经变成了当前行业的热点话题。XFire正是在这种情况下产生的。它能够使POJO发布为最少的Web Services,而只需要付出最小化的努力。从而,它使希望使用这项技术的初级开发者的学习曲线变得平缓。同时,由于它兼容最新标准和提供了丰富的API,XFire为高级用户提供了更多的大好机会。
          步骤清单:   

         1、 检查Java类的方法和默认构造函数确保为public

     2、 增加XFire servlet相关条目到web.xml中

     3、 创建services.xml,把它放到WEB-INF/classes/META-INF/xfire目录下

     4、 增加XFire和第三方包到你的Web应用的WEB-INF/lib文件夹中


          实际例子:
 0. 定义 web.xml
      <servlet>
        <servlet-name>XFireServlet</servlet-name>
        <display-name>XFire Servlet</display-name>
        <servlet-class>org.codehaus.xfire.transport.http.XfireConfigurableServlet
         </servlet-class>
    </servlet><servlet-mapping>
        <servlet-name>XFireServlet</servlet-name>
        <url-pattern>/servlet/XFireServlet/*</url-pattern>
    </servlet-mapping>    
    <servlet-mapping>
        <servlet-name>XFireServlet</servlet-name>
        <url-pattern>/services/*</url-pattern>
    </servlet-mapping>

 1. 定义接口           

public interface IBankingService { 

    public String transferFunds(
        String fromAccount, String toAccount, double amount, String currency);
        
}

2.定义实现

import java.text.NumberFormat;
import java.text.DecimalFormat;

/** XFire WebServices sample implementation class. 
*/
public class BankingService implements IBankingService {
    
    //Default constructor.
    public BankingService(){    
    }
    
    /** Transfers fund from one account to another.
    */
    public String transferFunds(
        String fromAccount, String toAccount, double amount, String currency){
        
        String statusMessage = "";
                      
        //Call business objects and other components to get the job done.
        //Then create a status message and return.
        try {
            NumberFormat formatter = new DecimalFormat("###,###,###,###.00");       
            statusMessage = "COMPLETED: " + currency + " " + formatter.format(amount)+ 
            " was successfully transferred from A/C# " + fromAccount + " to A/C# " + toAccount;
        } catch (Exception e){
            statusMessage = "BankingService.transferFunds(): EXCEPTION: " + e.toString();
        }
        return statusMessage;
    }
    
}

3. 定义 web 描述
<beans xmlns="http://xfire.codehaus.org/config/1.0">
  
  <service>
    <name>Banking</name>
    <namespace>mybank</namespace>
    <serviceClass>com.mybank.xfire.example.IBankingService</serviceClass>
    <implementationClass>com.mybank.xfire.example.BankingService</implementationClass>
  </service>  
  
</beans>
4.部署获得WSDL
    WSDL的URL应该是:http://localhost:8080/websvc/services/Banking?wsdl。
5. 开发客户端
//Create a metadata of the service      
        Service serviceModel = new ObjectServiceFactory().create(IBankingService.class);        
        log.debug("callSoapServiceLocal(): got service model." );
   
        //Create a proxy for the deployed service
        XFire xfire = XFireFactory.newInstance().getXFire();
        XFireProxyFactory factory = new XFireProxyFactory(xfire);      
    
        String serviceUrl = "http://localhost:8080/websvc/services/Banking";
        
        IBankingService client = null;
        try {
            client = (IBankingService) factory.create(serviceModel, serviceUrl);
        } catch (MalformedURLException e) {
            log.error("WsClient.callWebService(): EXCEPTION: " + e.toString());
        }    
               
        //Invoke the service
        String serviceResponse = "";
        try { 
            serviceResponse = client.transferFunds(fromAccount, toAccount, amount, currency);
       } catch (Exception e){
            log.error("WsClient.callWebService(): EXCEPTION: " + e.toString());                 
            serviceResponse = e.toString();
        }        

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