org.springframework.web.portlet.handler

Class PortletContentGenerator

java.lang.Object

org.springframework.context.support.ApplicationObjectSupport

org.springframework.web.portlet.context.PortletApplicationObjectSupport

org.springframework.web.portlet.handler.PortletContentGenerator

All Implemented Interfaces:

Aware, ApplicationContextAware, PortletContextAware

Direct Known Subclasses:

AbstractController, AnnotationMethodHandlerAdapter

public abstract class PortletContentGenerator
extends PortletApplicationObjectSupport

Convenient superclass for any kind of web content generator, like AbstractController. Can also be used for custom handlers that have their own HandlerAdapter.

Supports portlet cache control options.

Since:

2.0

Author:

Juergen Hoeller, John A. Lewis

See Also:

setCacheSeconds(int), setRequireSession(boolean)

Field Summary

Fields inherited from class org.springframework.context.support.ApplicationObjectSupport

logger

Constructor Summary

Constructors

Constructor and Description
PortletContentGenerator()

Method Summary

Modifier and Type	Method and Description
protected void	applyCacheSeconds(MimeResponse response, int seconds) Apply the given cache seconds to the render response
protected void	cacheForSeconds(MimeResponse response, int seconds) Set portlet response to allow caching for the given number of seconds.
protected void	check(PortletRequest request, PortletResponse response) Check and prepare the given request and response according to the settings of this generator.
protected void	checkAndPrepare(PortletRequest request, MimeResponse response) Check and prepare the given request and response according to the settings of this generator.
protected void	checkAndPrepare(PortletRequest request, MimeResponse response, int cacheSeconds) Check and prepare the given request and response according to the settings of this generator.
int	getCacheSeconds() Return the number of seconds that content is cached.
boolean	isRequireSession() Return whether a session is required to handle requests.
protected void	preventCaching(MimeResponse response) Prevent the render response from being cached.
void	setCacheSeconds(int seconds) Cache content for the given number of seconds.
void	setRequireSession(boolean requireSession) Set whether a session should be required to handle requests.

Methods inherited from class org.springframework.web.portlet.context.PortletApplicationObjectSupport

getPortletContext, getTempDir, isContextRequired, setPortletContext

Methods inherited from class org.springframework.context.support.ApplicationObjectSupport

getApplicationContext, getMessageSourceAccessor, initApplicationContext, initApplicationContext, requiredContextClass, setApplicationContext

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PortletContentGenerator

public PortletContentGenerator()

Method Detail

setRequireSession

public final void setRequireSession(boolean requireSession)

Set whether a session should be required to handle requests.

isRequireSession

public final boolean isRequireSession()

Return whether a session is required to handle requests.

setCacheSeconds

public final void setCacheSeconds(int seconds)

Cache content for the given number of seconds. Default is -1, indicating no override of portlet content caching.

Only if this is set to 0 (no cache) or a positive value (cache for this many seconds) will this class override the portlet settings.

The cache setting can be overwritten by subclasses, before content is generated.

getCacheSeconds

public final int getCacheSeconds()

Return the number of seconds that content is cached.

check

protected final void check(PortletRequest request,
                           PortletResponse response)
                    throws PortletException

Check and prepare the given request and response according to the settings of this generator. Checks for a required session, and applies the number of cache seconds configured for this generator (if it is a render request/response).

Parameters:

request - current portlet request

response - current portlet response

Throws:

PortletException - if the request cannot be handled because a check failed

checkAndPrepare

protected final void checkAndPrepare(PortletRequest request,
                                     MimeResponse response)
                              throws PortletException

Check and prepare the given request and response according to the settings of this generator. Checks for a required session, and applies the number of cache seconds configured for this generator (if it is a render request/response).

Parameters:

request - current portlet request

response - current portlet response

Throws:

PortletException - if the request cannot be handled because a check failed

checkAndPrepare

protected final void checkAndPrepare(PortletRequest request,
                                     MimeResponse response,
                                     int cacheSeconds)
                              throws PortletException

Check and prepare the given request and response according to the settings of this generator. Checks for a required session, and applies the given number of cache seconds (if it is a render request/response).

Parameters:

request - current portlet request

response - current portlet response

cacheSeconds - positive number of seconds into the future that the response should be cacheable for, 0 to prevent caching

Throws:

PortletException - if the request cannot be handled because a check failed

preventCaching

protected final void preventCaching(MimeResponse response)

Prevent the render response from being cached.

cacheForSeconds

protected final void cacheForSeconds(MimeResponse response,
                                     int seconds)

Set portlet response to allow caching for the given number of seconds.

Parameters:

response - current portlet render response

seconds - number of seconds into the future that the response should be cacheable for

applyCacheSeconds

protected final void applyCacheSeconds(MimeResponse response,
                                       int seconds)

Apply the given cache seconds to the render response

Parameters:

response - current portlet render response

seconds - positive number of seconds into the future that the response should be cacheable for, 0 to prevent caching