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Learning Vaadin by Nicolas Frankel

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Portals

Although not as widespread as some wished them to be 10 years ago, portals are still common enough to be a target of choice for Vaadin web applications.

Portal, container, and portlet

Before going further, one has to understand some essential notions about what a portal is and how it is constituted.

Three different concepts are each attached to a different granularity level.

  • Portlet: A portlet is a pluggable software component, meant to be displayed inside a portal. As opposed to a servlet, a portlet only generates a part of the rendered page. If we liken it to a wall, a portlet would be a brick.
  • Portal: A portal is a full-fledged application that aggregates portlets. Most portals will also allow administrators (or individual users) to customize ...

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