将托管Web内容集成到现有J2EE应用程序中

I'm looking for a java based CMS application that will allow me embed specific UI 'component's or 'regions' (eg. newsfeed, page-section, video, etc.) into pages of an existing J2ee web application. The idea is to mix managed content with custom web-application function, where the 'dominant' web-application is our custom application but it integrates these components for which the content can be manged by A CMS. I have looked through a number of CMSs (Jahia, Magnolia, Alfresco, Nuxeo, Walrus and a couple more), but haven't found anything that readily provides managed components that I can integrate easily. Integration can be at the controller, jsp or even client (Ajax/iframe) level, but I am trying to stay away from introducing portlets into my stack.I'm looking for a java based CMS application th