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- ---
- title: Overview
- order: 1
- layout: page
- ---
-
- [[portal.overview]]
- = Overview
-
- Vaadin Framework supports running UIs as portlets in a portal, as defined in
- the JSR-286 (Java Portlet API 2.0) standard. A portlet UI is defined just as a
- regular UI, but deploying to a portal is somewhat different from deployment of
- regular web applications, requiring special portlet descriptors, etc. Creating
- the portlet project with the Maven archetype automatically generates the
- necessary descriptors.
-
- Vaadin Framework also supports developing OSGi portlets for Liferay 7.
-
- In addition to providing user interface through the Vaadin UI, portlets can
- integrate with the portal to switch between portlet modes and process special
- portal requests, such as actions and events.
-
- While providing generic support for all portals implementing the standard,
- Vaadin especially supports the Liferay portal and the needed portal-specific
- configuration in this chapter is given for Liferay. Vaadin also has a special
- Liferay IPC add-on to enable communication between portlets.
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