public void TestDBreezeInsertOrder()
{
using (NodeContext ctx = NodeContext.Create(this))
{
using (var engine = new DBreeze.DBreezeEngine(ctx.FolderName + "/2"))
{
var data = new[]
{
new uint256(3),
new uint256(2),
new uint256(2439425),
new uint256(5),
new uint256(243945),
new uint256(10),
new uint256(Hashes.Hash256(new byte[0])),
new uint256(Hashes.Hash256(new byte[] { 1 })),
new uint256(Hashes.Hash256(new byte[] { 2 })),
};
Array.Sort(data, new UInt256Comparer());
using (DBreeze.Transactions.Transaction tx = engine.GetTransaction())
{
foreach (uint256 d in data)
{
tx.Insert("Table", d.ToBytes(false), d.ToBytes());
}
tx.Commit();
}
var data2 = new uint256[data.Length];
using (DBreeze.Transactions.Transaction tx = engine.GetTransaction())
{
int i = 0;
foreach (Row <byte[], byte[]> row in tx.SelectForward <byte[], byte[]>("Table"))
{
data2[i++] = new uint256(row.Key, false);
}
}
Assert.True(data.SequenceEqual(data2));
}
}
}
public void DBreezeEngineAbleToAccessExistingTransactionData()
{
string dir = CreateTestDir(this);
uint256[] data = SetupTransactionData(dir);
using (var engine = new DBreezeEngine(dir))
{
using (DBreeze.Transactions.Transaction transaction = engine.GetTransaction())
{
var data2 = new uint256[data.Length];
int i = 0;
foreach (Row<int, byte[]> row in transaction.SelectForward<int, byte[]>("Table"))
{
data2[i++] = new uint256(row.Value, false);
}
Assert.True(data.SequenceEqual(data2));
}
}
}
public Task LoadAsync(ConcurrentChain chain)
{
Guard.Assert(chain.Tip == chain.Genesis);
Task task = Task.Run(() =>
{
using (DBreeze.Transactions.Transaction transaction = this.dbreeze.GetTransaction())
{
ChainedBlock tip = null;
bool first = true;
foreach (Row <int, BlockHeader> row in 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;
}
this.locator = tip.GetLocator();
chain.SetTip(tip);
}
});
return(task);
}
