import java.io.InputStream;

public class DownloadAction implements ExternalResource.ContentAndMetadataAction<Object> {
    private File destination;
    private ExternalResourceMetaData metaData;
    private final ExternalResourceName source;
    private final TemporaryFileProvider temporaryFileProvider;
    @Nullable
    private final Logger logger;

                val downloadAction = DownloadAction(externalResourceName, temporaryFileProvider, null)
                externalResource.withContentIfPresent(downloadAction)

                lockingAccessCoordinator.useCache {
                    val cachedResource = externalResourceFileStore.move(externalResource.toString(), downloadAction.destination)
                    val fileInFileStore = cachedResource.file

        // Download to temporary location
        DownloadAction downloadAction = new DownloadAction(source, temporaryFileProvider, LOGGER);
        resource.withContentIfPresent(downloadAction);
        if (downloadAction.getMetaData() == null) {
            return null;
        }

        // Move into cache
        try {
            return moveIntoCache(source, downloadAction.getDestination(), fileStore, downloadAction.getMetaData());