Returns the org.scalatra.FlashMap instance for the current request.
Override to implement custom session retriever, or sanity checks if session is still active
Determines whether unused flash entries should be swept.
Determines whether unused flash entries should be swept. The default is false.
Allows an action to set key-value pairs in a transient state that is accessible only to the next action and is expired immediately after that. This is especially useful when using the POST-REDIRECT-GET pattern to trace the result of an operation.
FlashMap