org.opencms.flex
Class CmsFlexController

java.lang.Object
  org.opencms.flex.CmsFlexController

public class CmsFlexController
extends java.lang.Object

Controller for getting access to the CmsObject, should be used as a request attribute.

Since:

6.0.0

Version:

$Revision: 1.44 $

Author:

Alexander Kandzior

Field Summary

static java.lang.String

ATTRIBUTE_NAME Constant for the controller request attribute name.

Constructor Summary

CmsFlexController(CmsObject cms, CmsFlexController base)
Creates a new controller form the old one, exchanging just the provided OpenCms user context.

CmsFlexController(CmsObject cms, CmsResource resource, CmsFlexCache cache, javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res, boolean streaming, boolean top)
Default constructor.

Method Summary

void	clear() Clears all data of this controller.
CmsFlexCache	getCmsCache() Returns the CmsFlexCache instance where all results from this request will be cached in.
CmsObject	getCmsObject() Returns the wrapped CmsObject.
static CmsObject	getCmsObject(javax.servlet.ServletRequest req) Returns the wrapped CmsObject form the provided request, or null if the request is not running inside OpenCms.
CmsResource	getCmsResource() This method provides access to the top-level CmsResource of the request which is of a type that supports the FlexCache, i.e. usually the CmsFile that is identical to the file uri requested by the user, not he current included element.
static CmsFlexController	getController(javax.servlet.ServletRequest req) Returns the controller from the given request, or null if the request is not running inside OpenCms.
CmsFlexRequest	getCurrentRequest() Returns the current flex request.
CmsFlexResponse	getCurrentResponse() Returns the current flex response.
long	getDateExpires() Returns the combined "expires" date for all resources read during this request.
long	getDateLastModified() Returns the combined "last modified" date for all resources read during this request.
int	getResponseStackSize() Returns the size of the response stack.
java.lang.Throwable	getThrowable() Returns an exception (Throwable) that was caught during inclusion of sub elements, or null if no exceptions where thrown in sub elements.
static java.lang.Throwable	getThrowable(javax.servlet.ServletRequest req) Provides access to a root cause Exception that might have occurred in a complex include scenario.
java.lang.String	getThrowableResourceUri() Returns the URI of a VFS resource that caused the exception that was caught during inclusion of sub elements, might return null if no URI information was available for the exception.
static java.lang.String	getThrowableResourceUri(javax.servlet.ServletRequest req) Provides access to URI of a VFS resource that caused an exception that might have occurred in a complex include scenario.
javax.servlet.http.HttpServletRequest	getTopRequest() Returns the current http request.
javax.servlet.http.HttpServletResponse	getTopResponse() Returns the current http response.
static boolean	isCmsOnlineRequest(javax.servlet.ServletRequest req) Checks if the provided request is running in OpenCms and the current users project is the online project.
static boolean	isCmsRequest(javax.servlet.ServletRequest req) Checks if the provided request is running in OpenCms.
boolean	isEmptyRequestList() Returns true if the controller does not yet contain any requests.
boolean	isForwardMode() Returns true if this controller is currently in "forward" mode.
static boolean	isNotModifiedSince(javax.servlet.http.HttpServletRequest req, long dateLastModified) Checks if the request has the "If-Modified-Since" header set, and if so, if the header date value is equal to the provided last modification date.
boolean	isStreaming() Returns true if the generated output of the response should be written to the stream directly.
boolean	isTop() Returns true if this controller was generated as top level controller.
void	pop() Removes the topmost request/response pair from the stack.
void	push(CmsFlexRequest req, CmsFlexResponse res) Adds another flex request/response pair to the stack.
static void	removeController(javax.servlet.ServletRequest req) Removes the controller attribute from a request.
static void	setController(javax.servlet.ServletRequest req, CmsFlexController controller) Stores the given controller in the given request (using a request attribute).
static void	setDateExpiresHeader(javax.servlet.http.HttpServletResponse res, long dateExpires, long maxAge) Sets the Expires date header for a given http request.
static void	setDateLastModifiedHeader(javax.servlet.http.HttpServletResponse res, long dateLastModified) Sets the "last modified" date header for a given http request.
void	setForwardMode(boolean value) Sets the value of the "forward mode" flag.
java.lang.Throwable	setThrowable(java.lang.Throwable throwable, java.lang.String resource) Sets an exception (Throwable) that was caught during inclusion of sub elements.
void	suspendFlexResponse() Puts the response in a suspended state.
void	updateDates(long dateLastModified, long dateExpires) Updates the "last modified" date and the "expires" date for all resources read during this request with the given values.

Methods inherited from class java.lang.Object

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

Field Detail

ATTRIBUTE_NAME

public static final java.lang.String ATTRIBUTE_NAME

Constant for the controller request attribute name.

See Also:

Constant Field Values

Constructor Detail

CmsFlexController

public CmsFlexController(CmsObject cms,
                         CmsFlexController base)

Creates a new controller form the old one, exchanging just the provided OpenCms user context.

Parameters:

cms - the OpenCms user context for this controller

base - the base controller

CmsFlexController

public CmsFlexController(CmsObject cms,
                         CmsResource resource,
                         CmsFlexCache cache,
                         javax.servlet.http.HttpServletRequest req,
                         javax.servlet.http.HttpServletResponse res,
                         boolean streaming,
                         boolean top)

Default constructor.

Parameters:

cms - the initial CmsObject to wrap in the controller

resource - the file requested

cache - the instance of the flex cache

req - the current request

res - the current response

streaming - indicates if the response is streaming

top - indicates if the response is the top response

Method Detail

getCmsObject

public static CmsObject getCmsObject(javax.servlet.ServletRequest req)

Returns the wrapped CmsObject form the provided request, or null if the request is not running inside OpenCms.

Parameters:

req - the current request

Returns:

the wrapped CmsObject

getController

public static CmsFlexController getController(javax.servlet.ServletRequest req)

Returns the controller from the given request, or null if the request is not running inside OpenCms.

Parameters:

req - the request to get the controller from

Returns:

the controller from the given request, or null if the request is not running inside OpenCms

getThrowable

public static java.lang.Throwable getThrowable(javax.servlet.ServletRequest req)

Provides access to a root cause Exception that might have occurred in a complex include scenario.

Parameters:

req - the current request

Returns:

the root cause exception or null if no root cause exception is available

See Also:

getThrowable()

getThrowableResourceUri

public static java.lang.String getThrowableResourceUri(javax.servlet.ServletRequest req)

Provides access to URI of a VFS resource that caused an exception that might have occurred in a complex include scenario.

Parameters:

req - the current request

Returns:

to URI of a VFS resource that caused an exception, or null

See Also:

getThrowableResourceUri()

isCmsOnlineRequest

public static boolean isCmsOnlineRequest(javax.servlet.ServletRequest req)

Checks if the provided request is running in OpenCms and the current users project is the online project.

Parameters:

req - the current request

Returns:

true if the request is running in OpenCms and the current users project is the online project, false otherwise

isCmsRequest

public static boolean isCmsRequest(javax.servlet.ServletRequest req)

Checks if the provided request is running in OpenCms.

Parameters:

req - the current request

Returns:

true if the request is running in OpenCms, false otherwise

isNotModifiedSince

public static boolean isNotModifiedSince(javax.servlet.http.HttpServletRequest req,
                                         long dateLastModified)

Checks if the request has the "If-Modified-Since" header set, and if so, if the header date value is equal to the provided last modification date.

Parameters:

req - the request to set the "If-Modified-Since" date header from

dateLastModified - the date to compare the header with

Returns:

true if the header is set and the header date is equal to the provided date

removeController

public static void removeController(javax.servlet.ServletRequest req)

Removes the controller attribute from a request.

Parameters:

req - the request to remove the controller from

setController

public static void setController(javax.servlet.ServletRequest req,
                                 CmsFlexController controller)

Stores the given controller in the given request (using a request attribute).

Parameters:

req - the request where to store the controller in

controller - the controller to store

setDateExpiresHeader

public static void setDateExpiresHeader(javax.servlet.http.HttpServletResponse res,
                                        long dateExpires,
                                        long maxAge)

Sets the Expires date header for a given http request.

Also sets the cache-control: max-age header to the time of the expiration. A certain upper limit is imposed on the expiration date parameter to ensure the resources are not cached to long in proxies. This can be controlled by the maxAge parameter. If maxAge is lower then 0, then a default max age of 86400000 msec (1 day) is used.

Parameters:

res - the response to set the "Expires" date header for

maxAge - maximum amount of time in milliseconds the response remains valid

dateExpires - the date to set (if this is not in the future, it is ignored)

setDateLastModifiedHeader

public static void setDateLastModifiedHeader(javax.servlet.http.HttpServletResponse res,
                                             long dateLastModified)

Sets the "last modified" date header for a given http request.

Parameters:

res - the response to set the "last modified" date header for

dateLastModified - the date to set (if this is lower then 0, the current time is set)

clear

public void clear()

Clears all data of this controller.

getCmsCache

public CmsFlexCache getCmsCache()

Returns the CmsFlexCache instance where all results from this request will be cached in.

This is public so that pages like the Flex Cache Administration page have a way to access the cache object.

Returns:

the CmsFlexCache instance where all results from this request will be cached in

getCmsObject

public CmsObject getCmsObject()

Returns the wrapped CmsObject.

Returns:

the wrapped CmsObject

getCmsResource

public CmsResource getCmsResource()

This method provides access to the top-level CmsResource of the request which is of a type that supports the FlexCache, i.e. usually the CmsFile that is identical to the file uri requested by the user, not he current included element.

Returns:

the requested top-level CmsFile

getCurrentRequest

public CmsFlexRequest getCurrentRequest()

Returns the current flex request.

Returns:

the current flex request

getCurrentResponse

public CmsFlexResponse getCurrentResponse()

Returns the current flex response.

Returns:

the current flex response

getDateExpires

public long getDateExpires()

Returns the combined "expires" date for all resources read during this request.

Returns:

the combined "expires" date for all resources read during this request

getDateLastModified

public long getDateLastModified()

Returns the combined "last modified" date for all resources read during this request.

Returns:

the combined "last modified" date for all resources read during this request

getResponseStackSize

public int getResponseStackSize()

Returns the size of the response stack.

Returns:

the size of the response stack

getThrowable

public java.lang.Throwable getThrowable()

Returns an exception (Throwable) that was caught during inclusion of sub elements, or null if no exceptions where thrown in sub elements.

Returns:

an exception (Throwable) that was caught during inclusion of sub elements

getThrowableResourceUri

public java.lang.String getThrowableResourceUri()

Returns the URI of a VFS resource that caused the exception that was caught during inclusion of sub elements, might return null if no URI information was available for the exception.

Returns:

the URI of a VFS resource that caused the exception that was caught during inclusion of sub elements

getTopRequest

public javax.servlet.http.HttpServletRequest getTopRequest()

Returns the current http request.

Returns:

the current http request

getTopResponse

public javax.servlet.http.HttpServletResponse getTopResponse()

Returns the current http response.

Returns:

the current http response

isEmptyRequestList

public boolean isEmptyRequestList()

Returns true if the controller does not yet contain any requests.

Returns:

true if the controller does not yet contain any requests

isForwardMode

public boolean isForwardMode()

Returns true if this controller is currently in "forward" mode.

Returns:

true if this controller is currently in "forward" mode

isStreaming

public boolean isStreaming()

Returns true if the generated output of the response should be written to the stream directly.

Returns:

true if the generated output of the response should be written to the stream directly

isTop

public boolean isTop()

Returns true if this controller was generated as top level controller.

If a resource (e.g. a JSP) is processed and it's content is included in another resource, then this will be false.

Returns:

true if this controller was generated as top level controller

See Also:

I_CmsResourceLoader.dump(CmsObject, CmsResource, String, java.util.Locale, HttpServletRequest, HttpServletResponse), CmsJspActionElement.getContent(String)

pop

public void pop()

Removes the topmost request/response pair from the stack.

push

public void push(CmsFlexRequest req,
                 CmsFlexResponse res)

Adds another flex request/response pair to the stack.

Parameters:

req - the request to add

res - the response to add

setForwardMode

public void setForwardMode(boolean value)

Sets the value of the "forward mode" flag.

Parameters:

value - the forward mode to set

setThrowable

public java.lang.Throwable setThrowable(java.lang.Throwable throwable,
                                        java.lang.String resource)

Sets an exception (Throwable) that was caught during inclusion of sub elements.

If another exception is already set in this controller, then the additional exception is ignored.

Parameters:

throwable - the exception (Throwable) to set

resource - the URI of the VFS resource the error occurred on (might be null if unknown)

Returns:

the exception stored in the controller

suspendFlexResponse

public void suspendFlexResponse()

Puts the response in a suspended state.

updateDates

public void updateDates(long dateLastModified,
                        long dateExpires)

Updates the "last modified" date and the "expires" date for all resources read during this request with the given values.

The currently stored value for "last modified" is only updated with the new value if the new value is either larger (i.e. newer) then the stored value, or if the new value is less then zero, which indicates that the "last modified" optimization can not be used because the element is dynamic.

The stored "expires" value is only updated if the new value is smaller then the stored value.

Parameters:

dateLastModified - the value to update the "last modified" date with

dateExpires - the value to update the "expires" date with