public Task Load(ConcurrentChain chain)
{
Guard.Assert(chain.Tip == chain.Genesis);
return(_Session.Do(() =>
{
ChainedBlock tip = null;
bool first = true;
foreach (var row in _Session.Transaction.SelectForward <int, BlockHeader>("Chain"))
{
if (tip != null && row.Value.HashPrevBlock != tip.HashBlock)
{
break;
}
tip = new ChainedBlock(row.Value, null, tip);
if (first)
{
first = false;
Guard.Assert(tip.HashBlock == chain.Genesis.HashBlock); // can't swap networks
}
}
if (tip == null)
{
return;
}
_Locator = tip.GetLocator();
chain.SetTip(tip);
}));
}
protected override Task <byte[]> GetBytes(string key)
{
Guard.NotEmpty(key, nameof(key));
return(_Session.Do(() =>
{
var row = _Session.Transaction.Select <string, byte[]>(_Name, key);
if (row == null || !row.Exists)
{
return null;
}
return row.Value;
}));
}
public DBreezeNoSqlRepository(string name, string folder)
{
Guard.NotEmpty(name, nameof(name));
Guard.NotEmpty(folder, nameof(folder));
_Name = name;
_Session = new DBreezeSingleThreadSession(name, folder);
_Session.Do(() =>
{
_Session.Transaction.ValuesLazyLoadingIsOn = false;
});
}
