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See:
Description
| Interface Summary | |
| ActionRequest | The ActionRequest represents the request sent to the portlet
to handle an action. |
| ActionResponse | The ActionResponse interface represents the portlet
response to an action request, the invocation of the processAction method. |
| PortalContext | The PortalContext interface gives the portlet
the ability to retrieve information about the portal calling this portlet. |
| Portlet | The Portlet interface is used by the portlet container to
invoke the portlets. |
| PortletConfig | The PortletConfig interface provides the portlet with
its configuration. |
| PortletContext | The PortletContext interface defines a portlet view
of the portlet container. |
| PortletPreferences | The PortletPreferences interface allows the portlet to store
configuration data. |
| PortletRequest | The PortletRequest is the basic interface extended by all portlet requests. |
| PortletRequestDispatcher | The RequestDispatcher interface
defines an object that receives requests from the client
and sends them to the specified resources (such as a servlet,
HTML file, or JSP file) on the server. |
| PortletResponse | The PortletResponse is the basic interface extended by all portlet
responses. |
| PortletSession | The PortletSession interface provides a way to identify a user
across more than one request and to store transient information about that user. |
| PortletURL | The PortletURL interface represents a URL
that reference the portlet itself. |
| PreferencesValidator | The PreferencesValidator allows the portlet to validate
the preference settings before they are stored in the persistent store. |
| RenderRequest | The RenderRequest represents the request sent to the portlet
to handle a render. |
| RenderResponse | The RenderResponse defines an object to assist a portlet in
sending a response to the portal. |
| Class Summary | |
| GenericPortlet | The GenericPortlet class provides a default implementation
for the Portlet interface. |
| PortletMode | The PortletMode class represents
the possible modes that a portlet can assume. |
| PortletSessionUtil | The PortletSessionUtil class helps with the decoding
of portlet session attributes from the HttpSession that the
PortletSession uses. |
| WindowState | The WindowState class represents
the possible window states that a portlet window can assume. |
| Exception Summary | |
| PortletException | The PortletException class defines a general exception
that a portlet can throw when it is unable to perform its operation
successfully. |
| PortletModeException | The PortletModeException is thrown when a portlet
tries to use or set a portlet mode that is not supported by the current
runtime environment. |
| PortletSecurityException | The PortletSecurityException is thrown when a
call fails because of security reasons. |
| UnavailableException | The portlet should throw the UnavailableException when
the portlet is either temporarily or permanently unavailable to handle requests. |
| UnmodifiableException | The UnmodifiableException is thrown when
a portlet tries to change the value for a preference
attribute, marked as unmodifiable in the deployment descriptor
with the non-modifiable tag, without
the needed permissions. |
| ValidatorException | The ValidatorException is thrown when a
the validation of a preference failed. |
| WindowStateException | The WindowStateException is thrown when a portlet
tries to use a window state that is not supported by the current
runtime environment. |
A portlet is a Java technology based web component, managed by a portlet container, that processes requests and generates dynamic content. Portlets provide a presentation layer to Information Systems.
Portlets generate fragments of markup (e.g. HTML, XHTML, WML). A portal combines markup fragments generated by different portlets into a portal page.
A portlet container manages the lifecyle of portlets. It also provides the required runtime environment.
Portlets are bundled in Portlet Applications as web applications using the WAR file format. A portlet application consists of two deployment descriptors: one to specify the web application resources (web.xml) and one to specify the portlet resources (portlet.xml).
Click here for an example of a portlet resources deployment descriptor (portlet.xml).
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