com.typesafe.play.cachecontrol.ResponseServeActions
A stored response was found, but is stale.
The cache must serve the stored response immediately, and validate in the background.
If the validation has not happened after now + delta seconds, then the resource should NOT be served stale.
A stored response was found, but is stale.
The cache must serve the stored response immediately, and validate in the background.
If the validation has not happened after now + delta seconds, then the resource should NOT be served stale.