Portlet aware of other portlets on the same page

jsf-2,portlet,websphere-portal,jsr286

My gut reaction to your question is that a portlet should be self contained enough that it doesn't need other portlets on the page to function. So without any other knowledge of why this needs to be done, it sounds like this design choice has some inherent flaws. Portlet A...

Can I create a Java Portal (JSR 168/286) using only an application server (Tomcat, JBoss, etc)?

java,liferay,portlet,ibm-was,jsr286

Is there a way to use Java Portlet projects without having to add vendor-specific files or code, and add them to any application server? No. The likes of tomcat, jboss etc are Servlet Containers and to run portlets you need Portlet Container which is actually provided by Portals like...

How to render a web page in a portlet view

liferay,liferay-6,portlet,jsrender,jsr286

This sounds like a question on how to build a basic portlet. Please check a tutorial (step-by-step). If this is not your question, please specify further - your question is way too broad to assume that you have a specific (other) problem....