Recache

The Recache method instructs Unreal to reload data layers from disk. Calling a recache operation ensures that all active data reflects the latest content on disk.

A recache is initiated using a RecacheRequest. Unreal reports progress using RecacheResponse messages until the operation is complete.

RecacheRequest

Starts a recaching operation. Unreal will scan the default media directory and refresh its cached data layers. By default, this operations recaches all available rasters.

name	type	required	description
type	string	✓	"RecacheRequest"
rasters	array		Optional list of specific rasters to recache.

Example request:

{
  "type": "RecacheRequest",
  "rasters": ["OverviewMap", "UpdatedRaster"]
}

RecacheResponse

Sent repeatedly during the recache process to indicate progress.

name	type	description
type	string	"RecacheResponse"
index	number	Number of items processed so far.
max	number	Total number of items to process in the recache operation.

Example response:

{
  "type": "RecacheResponse",
  "index": 10,
  "max": 250
}