JBossPortletBridge 与 JBoss Portal 、Liferay

之前一个项目是做一个政府的门户，用的是JBoss Portal作为portlet容器。项目一期结尾，客户要求所做的portlet能在Liferay上跑，经过R&D之后，觉得这个几乎是不能完成的任务。

 

项目里用的bridge: JBossPortletBridge，它可以很好的JBoss Portal结合，对于Liferay却显得无能为力。JBoss Portal支持richfaces存在问题，当一个页面存在多个portlets的时候，会有badpadding的异常，所以项目里并没有用a4j的 东西。如果把这些portlets放到Liferay里面，<h:commandXXX/>是不起任何作用的， <a4j:commandXXX/>才能帮到忙。还有很重要的一点 ，需要得到正确的javax.servlet.include.path_info。

 

这类的资料晚上很少，经过N久的努力，找到一个很有用的article，网址如下：

http://java-ua.blogspot.com/2008/10/richfaces-jsf-ri-jbossportletbridge.html

 

主要内容摘录如下：

 

The task to make few portlets for Liferay 5.1 Portal using RichFaces + JSF RI looks trivial. But it isn't.
There are few decisions:

1. Use Liferay listener for Sun JSF with Sun's FacesPortlet.
   
2. Use JBossPortletBridge, because it supports RichFaces and AJAX.
   

I choosed the second with understanding that JBossPortletBridge is in beta and everywhere says that it supports JBossPortal, but I did not find where says - "It supports Liferay too". It does not support Liferay Portal 5.0 .
I found few interesting things, that anyone should know before starting write portlets with RichFaces for Liferay using JBossPortletBridge 1.0.x Beta:

1. RichFaces should be at least 3.2.1.
   
2. You should configure portlet as ajaxable with server side state saving policy
   
3. Override the javax.portlet.faces.GenericFacesPortlet given with JBossPortletBridge. You'll need manually setup the request attribute javax.servlet.include.path_info with correct viewId you want to process and render. Or you can setup this request attribute at the PortletExternalContextImpl class in calculateServletPath() method (remember JBossPortletBridge 1.0.x Beta).
   
4. Use <a4j:commandXXX/> components to process navigation. <h:commandXXX/> will not help ((.
   

 

虽然大家都遵循×××，但是通用性还是有很大区别的。项目不能依赖于所运行的容器，这个项目开始并没有考虑到要搬到另外一个portal容器，所以有些东西是和JBoss Portal戚戚相关的，这会为以后带来很多不必要的麻烦。最后终于把portlet在Liferay里面跑起来了，但是也仅仅是能出个界面，功能是用不了的。如果真的需要在这两个容器里面都可以跑，那还得有许多的东西去研究，因为a4j在JBoss Portal里有问题，而h:在Liferay里有问题。当然，换个bridge当另说，最理想的结果是JBossPortletBridge 支持Liferay了...