SessionFlashMapManager (Spring Framework 5.2.12.RELEASE API)

java.lang.Object
- org.springframework.web.servlet.support.AbstractFlashMapManager
- - org.springframework.web.servlet.support.SessionFlashMapManager

All Implemented Interfaces:
FlashMapManager
```
public class SessionFlashMapManager
extends AbstractFlashMapManager
```
Store and retrieve FlashMap instances to and from the HTTP session.
Since:
3.1.1
Author:
Rossen Stoyanchev, Juergen Hoeller

Field Summary
- Fields inherited from class org.springframework.web.servlet.support.AbstractFlashMapManager
  logger

Constructor Summary
Constructors
Constructor Description
SessionFlashMapManager()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected Object`	`getFlashMapsMutex(HttpServletRequest request)`	Exposes the best available session mutex.
`protected List<FlashMap>`	`retrieveFlashMaps(HttpServletRequest request)`	Retrieves saved FlashMap instances from the HTTP session, if any.
`protected void`	`updateFlashMaps(List<FlashMap> flashMaps, HttpServletRequest request, HttpServletResponse response)`	Saves the given FlashMap instances in the HTTP session.

Methods inherited from class org.springframework.web.servlet.support.AbstractFlashMapManager
getFlashMapTimeout, getUrlPathHelper, isFlashMapForRequest, retrieveAndUpdate, saveOutputFlashMap, setFlashMapTimeout, setUrlPathHelper

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SessionFlashMapManager
```
public SessionFlashMapManager()
```
- Method Detail
  - retrieveFlashMaps
```
@Nullable
protected List<FlashMap> retrieveFlashMaps(HttpServletRequest request)
```
    Retrieves saved FlashMap instances from the HTTP session, if any.
    Specified by:
    retrieveFlashMaps in class AbstractFlashMapManager
    Parameters:
    request - the current request
    Returns:
    a List with FlashMap instances, or null if none found
  - updateFlashMaps
```
protected void updateFlashMaps(List<FlashMap> flashMaps,
                               HttpServletRequest request,
                               HttpServletResponse response)
```
    Saves the given FlashMap instances in the HTTP session.
    Specified by:
    updateFlashMaps in class AbstractFlashMapManager
    Parameters:
    flashMaps - a (potentially empty) list of FlashMap instances to save
    request - the current request
    response - the current response
  - getFlashMapsMutex
```
protected Object getFlashMapsMutex(HttpServletRequest request)
```
    Exposes the best available session mutex.
    Overrides:
    getFlashMapsMutex in class AbstractFlashMapManager
    Parameters:
    request - the current request
    Returns:
    the mutex to use (may be null if none applicable)
    See Also:
    WebUtils.getSessionMutex(javax.servlet.http.HttpSession), HttpSessionMutexListener