WorldWind Kotlin/earth.worldwind.layer.cache/GpkgBlobStore

GpkgBlobStore

GeoPackage-backed BlobStore following the OGC 3D Tiles GeoPackage Extension shape: one SQLite table per dataset, registered in gpkg_contents (data_type='3d-tiles') and gpkg_extensions (gpkg_3d_tiles). Row schema is GpkgBlobRow; the table lifecycle is owned by earth.worldwind.formats.gpkg.GpkgContentManager.openBlobStore.

Types

Companion

object Companion

Properties

tableName

val tableName: String

Functions

clear

open suspend override fun clear()

Drop every entry. Schema is preserved so subsequent puts succeed.

evict

suspend fun evict()

Run the evictionPolicy sweep. Chunked DELETE + yield so a large trim doesn't hold the SQLite connection for tens of seconds. staleAfter is refresh-only — only CachePolicy.maxEntries evicts.

get

open suspend override fun get(uri: String): BlobEntry?

Fetch a previously-stored blob. Null when uri is not in the cache.

put

abstract suspend fun put(uri: String, bytes: ByteArray, contentType: String? = null, etag: String? = null, lastModified: kotlin/time/Instant?? = null, responseUrl: String? = null)

Persist or replace the blob for uri. contentType is whatever the server returned (e.g. application/octet-stream, model/gltf-binary); null when unknown. etag and lastModified are conditional-fetch metadata the layer can consult on a future revalidation request. responseUrl is the post-redirect URL the body was actually served from — replayed via BlobEntry.responseUrl on cache hits so callers can resolve relative URIs against the body's true origin. Null when same as uri / unknown.

open suspend override fun put(uri: String, bytes: ByteArray, contentType: String?, etag: String?, lastModified: ERROR CLASS: Symbol not found for Instant??, responseUrl: String?)

remove

open suspend override fun remove(uri: String)

Drop one entry. No-op when uri is absent.

sizeBytes

open suspend override fun sizeBytes(): Long

Total stored payload size in bytes. Excludes metadata + schema overhead; close approximation suitable for budget reporting, not exact accounting.