What is Portlet Container??

Portlet Container

1).The lifecycle of a portlet is managed by the portlet container. A portlet container runs portlets and provides them with the required runtime environment. A portlet container contains portlets and manages their lifecycle. It also provides persistent storage for portlet preferences. A portlet container receives requests from the portal to execute requests on the portlets hosted by it.

2).A portlet container is not responsible for aggregating the content  produced by the portlets. It is the responsibility of the portal to handle the aggregation

3).A portal and a portlet container can be built together as a single component of an application suite or as two separate components of a portal application.

4).The portlet container is an extension of the servlet container. As such, a portlet container can be built on top of an existing servlet container or it may implement all the functionality of a servlet container. Regardless of how a portlet container is implemented, its runtime environment is assumed to support at least Servlet Specification 2.4.

Reference Link:

http://jsr286tutorial.blogspot.in/p/portlet-container_21.html