public static async Task <TypeStoreInfo> GetOrAddTypeStoreAsync(IMd dbInfoMd, string dbId)
{
IMd typeStoreHead;
var typeStoreResult = await dbInfoMd.GetValueAsync(TYPE_STORE_HEAD_KEY).ConfigureAwait(false);
if (!typeStoreResult.HasValue)
{
typeStoreHead = await MdAccess.CreateAsync(0)
.ConfigureAwait(false);
await dbInfoMd.AddAsync(TYPE_STORE_HEAD_KEY, new StoredValue(typeStoreHead.MdLocator))
.ConfigureAwait(false);
}
else
{
var typeStoreHeadLocation = typeStoreResult.Value.Payload.Parse <MdLocator>();
typeStoreHead = (await MdAccess.LocateAsync(typeStoreHeadLocation)
.ConfigureAwait(false)).Value;
}
Task onHeadChange(MdLocator newLocation) => dbInfoMd.SetAsync(TYPE_STORE_HEAD_KEY, new StoredValue(newLocation));
var dataTree = new DataTree(typeStoreHead, onHeadChange);
return(new TypeStoreInfo(dataTree));
}
DirectoryInfo SetupDirectoryInfo(FileSystemPath path, IMd md)
{
return(new DirectoryInfo(path.Path, md.MdLocator,
(key) => md.GetValueAsync(key).GetAwaiter().GetResult(),
(key, val) => md.SetAsync(key, val).GetAwaiter().GetResult()));
}