Package org.springframework.web.servlet.support

Class AbstractFlashMapManager

java.lang.Object
org.springframework.web.servlet.support.AbstractFlashMapManager
All Implemented Interfaces:
FlashMapManager
Direct Known Subclasses:
SessionFlashMapManager
public abstract class AbstractFlashMapManager extends Object implements FlashMapManager
A base class for FlashMapManager implementations.
Since:
3.1.1
Author:
Rossen Stoyanchev, Juergen Hoeller, Sam Brannen

  • Field Details

    • logger

      protected final org.apache.commons.logging.Log logger

  • Constructor Details

    • AbstractFlashMapManager

      public AbstractFlashMapManager()

  • Method Details

    • setFlashMapTimeout

      public void setFlashMapTimeout(int flashMapTimeout)
      Set the amount of time in seconds after a FlashMap is saved (at request completion) and before it expires.

      The default value is 180 seconds.

    • getFlashMapTimeout

      public int getFlashMapTimeout()
      Return the amount of time in seconds before a FlashMap expires.

    • setUrlPathHelper

      public void setUrlPathHelper(org.springframework.web.util.UrlPathHelper urlPathHelper)
      Set the UrlPathHelper to use to match FlashMap instances to requests.

    • getUrlPathHelper

      public org.springframework.web.util.UrlPathHelper getUrlPathHelper()
      Return the UrlPathHelper implementation to use.

    • retrieveAndUpdate

      @Nullable public final FlashMap retrieveAndUpdate(HttpServletRequest request, HttpServletResponse response)
      Description copied from interface: FlashMapManager
      Find a FlashMap saved by a previous request that matches to the current request, remove it from underlying storage, and also remove other expired FlashMap instances.

      This method is invoked in the beginning of every request in contrast to FlashMapManager.saveOutputFlashMap(org.springframework.web.servlet.FlashMap, jakarta.servlet.http.HttpServletRequest, jakarta.servlet.http.HttpServletResponse), which is invoked only when there are flash attributes to be saved - i.e. before a redirect.

      Specified by:
      retrieveAndUpdate in interface FlashMapManager
      Parameters:
      request - the current request
      response - the current response
      Returns:
      a FlashMap matching the current request or null

    • isFlashMapForRequest

      protected boolean isFlashMapForRequest(FlashMap flashMap, HttpServletRequest request)
      Whether the given FlashMap matches the current request. Uses the expected request path and query parameters saved in the FlashMap.

    • saveOutputFlashMap

      public final void saveOutputFlashMap(FlashMap flashMap, HttpServletRequest request, HttpServletResponse response)
      Description copied from interface: FlashMapManager
      Save the given FlashMap, in some underlying storage and set the start of its expiration period.

      NOTE: Invoke this method prior to a redirect in order to allow saving the FlashMap in the HTTP session or in a response cookie before the response is committed.

      Specified by:
      saveOutputFlashMap in interface FlashMapManager
      Parameters:
      flashMap - the FlashMap to save
      request - the current request
      response - the current response

    • retrieveFlashMaps

      @Nullable protected abstract List<FlashMap> retrieveFlashMaps(HttpServletRequest request)
      Retrieve saved FlashMap instances from the underlying storage.
      Parameters:
      request - the current request
      Returns:
      a List with FlashMap instances, or null if none found

    • updateFlashMaps

      protected abstract void updateFlashMaps(List<FlashMap> flashMaps, HttpServletRequest request, HttpServletResponse response)
      Update the FlashMap instances in the underlying storage.
      Parameters:
      flashMaps - a (potentially empty) list of FlashMap instances to save
      request - the current request
      response - the current response

    • getFlashMapsMutex

      @Nullable protected Object getFlashMapsMutex(HttpServletRequest request)
      Obtain a mutex for modifying the FlashMap List as handled by retrieveFlashMaps(jakarta.servlet.http.HttpServletRequest) and updateFlashMaps(java.util.List<org.springframework.web.servlet.FlashMap>, jakarta.servlet.http.HttpServletRequest, jakarta.servlet.http.HttpServletResponse),

      The default implementation returns a shared static mutex. Subclasses are encouraged to return a more specific mutex, or null to indicate that no synchronization is necessary.

      Parameters:
      request - the current request
      Returns:
      the mutex to use (may be null if none applicable)
      Since:
      4.0.3