Result <Pointer> Set(string key, StoredValue value)
{
switch (Type)
{
case MdType.Pointers:
return(new InvalidOperation <Pointer>($"Cannot set values directly on pointers. Key {key}, value type {value.ValueType}"));
case MdType.Values:
using (var db = GetRocksDb())
{
var formattedKey = GetKey(key);
var column = db.GetColumnFamily(COLUMN_FAMILY);
db.Put(formattedKey, value.Json(), cf: column);
_keys.Add(formattedKey);
}
return(Result.OK(new Pointer
{
MdLocator = this.MdLocator,
MdKey = key,
ValueType = value.ValueType
}));
default:
return(new ArgumentOutOfRange <Pointer>(nameof(Type)));
}
}
// It will return the direct pointer to the stored value
// which makes it readily available for indexing at higher levels.
Result <Pointer> Add(string key, StoredValue value)
{
if (IsFull)
{
return(new MdOutOfEntriesError <Pointer>($"Filled: {Count}/{MdMetadata.Capacity}"));
}
switch (Type)
{
case MdType.Pointers:
if (Count == 0)
{
return(ExpandLevel(key, value));
}
IMd target;
using (var db = GetRocksDb())
{
var column = db.GetColumnFamily(COLUMN_FAMILY);
var stored = db.Get(GetKey(Count), cf: column);
if (value == null)
{
return(new KeyNotFound <Pointer>($"Key: {key} in {_data.LocatorString}"));
}
var pointer = value.Parse <StoredValue>().Payload.Parse <Pointer>();
target = Locate(pointer.MdLocator);
}
if (target.IsFull)
{
return(ExpandLevel(key, value));
}
return((target as LocalMd).Add(key, value));
case MdType.Values:
using (var db = GetRocksDb())
{
var formattedKey = GetKey(key);
var column = db.GetColumnFamily(COLUMN_FAMILY);
var stored = db.Get(formattedKey, cf: column);
//if (stored != null)
// return new ValueAlreadyExists<Pointer>($"Key: {key}.");
if (stored == null)
{
db.Put(formattedKey, value.Json(), cf: column);
db.Put($"{_data.LocatorString}_Count", $"{++Count}", cf: column);
_keys.Add(formattedKey);
}
else if (!_keys.Contains(formattedKey))
{
_keys.Add(formattedKey);
}
}
return(Result.OK(new Pointer
{
MdLocator = this.MdLocator,
MdKey = key,
ValueType = value.ValueType
}));
default:
return(new ArgumentOutOfRange <Pointer>(nameof(Type)));
}
}
