可重用Liferay（6.0.6）服務

Question

我試圖在不使用ext和servicebuilder的情況下實現可重用的定製服務。 我把這篇文章引用到：http://www.devatwork.nl/2010/04/implementing-a-reusable-liferay-service-without-ext-or-service-builder/，但我很困惑我該如何使用eclipse實現這個功能？以下是我也跟着這樣做的步驟：

- 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. 

有關部署，項目成功部署，但是當我試圖用通過CustomServicesUtil.getCustomMethod（）在CustomServicesImpl定義customMethods，我收到以下錯誤：

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

我配置的構建路徑，包括customservices.jar文件，但它不工作了，仍然顯示了同樣的錯誤。我不知道這是否是實施可再生服務的正確方法。我試過這樣，我可以在我的一個項目中使用自定義方法。

下面是定製服務代碼：

• 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(); 
       } 
      } 
  
  } 
  

這裏是控制器類我的另一個portlet，在這裏我想提出使用這項服務的代碼。

• 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); 
       } 
  } 
  

請點我就如何實現可重用的服務？任何指導都會非常有用。

謝謝。

Answer 1

我的想法是，您不需要複雜的服務。只需製作實用課程並將其寫入tomcat/lib/ext即可。確保tomcat/lib/ext是正確的tomcat/conf/catalina.properties配置是這樣的：

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