可重用 Liferay (6.0.6) 服务

Question

我正在尝试在不使用 ext 和 servicebuilder 的情况下实现可重复使用的自定义服务。 我引用了这篇文章：http://www.devatwork.nl/2010/04/implementing-a-reusable-liferay-service-without-ext-or-service-builder/，但我对如何使用 eclipse 实现这一点感到困惑？以下是我执行此操作的步骤：

- Created liferay-plugin project within eclipse.
- Created package containing CustomServices (interface) and CustomServicesUtil.
- Created jar file of package in step 2.
- Placed that jar file in tomcat\lib\ext\
- Then created package (with in same liferay-plugin project), that includes CutomServicesImpl and CustomServicesBaseImpl
- Defined portlet-spring.xml, service.properties, and modified web.xml (as per the article), and finally deployed the project. 

在部署时，项目已成功部署，但是当我尝试通过 CustomServicesUtil.getCustomMethod() 使用 CustomServicesImpl 中定义的 customMethods 时，出现以下错误：

        "java.lang.ClassNotFoundException: com.demo.custom.services.CustomServicesUtil"

我将构建路径配置为包含 customservices.jar 文件，但它无法正常工作，仍然显示相同的错误。我不知道这是否是实现可重用服务的正确方法。我试过这个，以便我可以在我的一个项目中使用自定义方法。

这是自定义服务的代码：

• CustomServices.java

   package com.demo.custom.services;
  
   import com.liferay.portal.model.User;
  
   public interface CustomServices {
      String getCustomName(User user);
   }
  

• CustomServicesUtil.java

      package com.demo.custom.services;
  
      import com.liferay.portal.model.User;
  
      public class CustomServicesUtil {
          private static CustomServices services;
  
          public static CustomServices getServices() {
              if (services == null) {
                  throw new RuntimeException("Custom Services not set");
              }
  
              return services;
          }
  
          public void setServices(CustomServices pServices) {
              services = pServices;
          }
  
          public static String getCustomName(User user){
              return getServices().getCustomName(user);
          }
      }
  

• CustomServicesBaseImpl.java

  package com.demo.custom.services.impl;
  
  import com.demo.custom.services.CustomServices;
  import com.liferay.portal.kernel.exception.SystemException;
  import com.liferay.portal.service.base.PrincipalBean;
  import com.liferay.portal.util.PortalUtil;
  
  public abstract class CustomServicesBaseImpl extends PrincipalBean implements CustomServices {
      protected CustomServices services;
  
      public CustomServices getServices() {
          return services;
      }
  
      public void setServices(CustomServices pServices) {
          this.services = pServices;
      }
      protected void runSQL(String sql) throws SystemException {
          try {
              PortalUtil.runSQL(sql);
          } catch (Exception e) {
              throw new SystemException(e);
          }
      }
  }
  

• CustomServicesImpl.java

  package com.demo.custom.services.impl;
  
  import com.liferay.portal.model.User;
  
  public class CustomServicesImpl extends CustomServicesBaseImpl {
  
      @Override
      public String getCustomName(User user) {
          // TODO Auto-generated method stub
  
          if(user == null){
              return null;
          }else{
              return new StringBuffer().append(user.getFirstName()).append(" ").append(user.getLastName()).toString();
          }
      }
  
  }
  

这是我的另一个 portlet 的控制器类的代码，我正在使用该服务。

• HelloCustomName.java

  package com.test;
  
  import java.io.IOException;
  
  import javax.portlet.PortletException;
  import javax.portlet.RenderRequest;
  import javax.portlet.RenderResponse;
  
  import com.demo.custom.services.CustomServicesUtil;
  import com.liferay.portal.kernel.util.WebKeys;
  import com.liferay.portal.model.User;
  import com.liferay.portal.theme.ThemeDisplay;
  import com.liferay.util.bridges.mvc.MVCPortlet;
  
  
  public class HelloCustomName extends MVCPortlet {
  
      @Override
      public void doView(RenderRequest renderRequest,
              RenderResponse renderResponse) throws IOException, PortletException {
          System.out.println("--doview----");
          ThemeDisplay themeDisplay = (ThemeDisplay)renderRequest.getAttribute(WebKeys.THEME_DISPLAY);
          User user = themeDisplay.getUser();
          String customName = CustomServicesUtil.getCustomName(user); //getting error here
          System.out.println("customName:" + customName);
          }
  }
  

请指点我如何实现可重用服务？任何指导都会非常有用。

谢谢。

Answer 1

我的意思是，您不需要服务的复杂性。只需制作实用程序类并将其放入tomcat/lib/ext。确保tomcat/lib/ext 在tomcat/conf/catalina.properties 中配置正确，如下所示：

  common.loader=${catalina.home}/lib/ext/*.jar