/**
* Saves a cache entry with an uncompressed layer {@link Blob} and an additional selector digest.
* Use {@link #writeCompressedLayer(Blob)} to save a compressed layer {@link Blob}.
*
* @param uncompressedLayerBlob the layer {@link Blob}
* @param layerEntries the layer entries that make up the layer
* @return the {@link CachedLayer} for the written layer
* @throws IOException if an I/O exception occurs
*/
public async Task <CachedLayer> WriteUncompressedLayerAsync(
IBlob uncompressedLayerBlob, ImmutableArray <LayerEntry> layerEntries)
{
DescriptorDigest selector = await LayerEntriesSelector.GenerateSelectorAsync(layerEntries).ConfigureAwait(false);
return(await cacheStorageWriter.WriteUncompressedAsync(
uncompressedLayerBlob, selector).ConfigureAwait(false));
}
/**
* Retrieves the {@link CachedLayer} that was built from the {@code layerEntries}.
*
* @param layerEntries the layer entries to match against
* @return a {@link CachedLayer} that was built from {@code layerEntries}, if found
* @throws IOException if an I/O exception occurs
* @throws CacheCorruptedException if the cache is corrupted
*/
public async Task <Maybe <CachedLayer> > RetrieveAsync(ImmutableArray <LayerEntry> layerEntries)
{
DescriptorDigest selector = await LayerEntriesSelector.GenerateSelectorAsync(layerEntries).ConfigureAwait(false);
Maybe <DescriptorDigest> optionalSelectedLayerDigest = cacheStorageReader.Select(selector);
if (!optionalSelectedLayerDigest.IsPresent())
{
return(Maybe.Empty <CachedLayer>());
}
return(cacheStorageReader.Retrieve(optionalSelectedLayerDigest.Get()));
}