HeaderPortlet (Portlet 4.0 API Specification)

All Known Implementing Classes:

GenericPortlet
```
public interface HeaderPortlet
```
The HeaderPortlet interface provides portlets with the ability to add HTTP headers to the response, and to generate markup for aggregation into the portal response document head section.

Since:

3.0

See Also:

HeaderRequest, HeaderResponse

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`renderHeaders(HeaderRequest request, HeaderResponse response)`	Called by the portlet container to allow the portlet to set response headers and generate markup for overall response document head section.

- Method Detail
  - renderHeaders
```
void renderHeaders(HeaderRequest request,
                   HeaderResponse response)
            throws PortletException,
                   IOException
```
    Called by the portlet container to allow the portlet to set response headers and generate markup for overall response document head section.
    
    Parameters:
    
    request - the header request
    
    response - the header response
    
    Throws:
    
    PortletException - if the portlet has problems fulfilling the request
    
    UnavailableException - if the portlet is unavailable to process the request at this time
    
    PortletSecurityException - if the portlet cannot fulfill this request due to security reasons
    
    IOException - if the streaming causes an I/O problem