private async Task <Chunk> GetChunkAtAsync([NotNull] IFdbTransaction trans, long offset)
{
Contract.Requires(trans != null && offset >= 0);
var chunkKey = await trans.GetKeyAsync(FdbKeySelector.LastLessOrEqual(DataKey(offset))).ConfigureAwait(false);
if (chunkKey.IsNull)
{ // nothing before (sparse)
return(default(Chunk));
}
if (chunkKey < DataKey(0))
{ // off beginning
return(default(Chunk));
}
long chunkOffset = DataKeyOffset(chunkKey);
Slice chunkData = await trans.GetAsync(chunkKey).ConfigureAwait(false);
if (chunkOffset + chunkData.Count <= offset)
{ // in sparse region after chunk
return(default(Chunk));
}
return(new Chunk(chunkKey, chunkData, chunkOffset));
}
private async Task Scenario5(IFdbTransaction tr)
{
var location = FdbSubspace.Create(Slice.FromAscii("TEST"));
//tr.Set(location.Pack(42), Slice.FromString("42"));
//tr.Set(location.Pack(50), Slice.FromString("50"));
//tr.Set(location.Pack(60), Slice.FromString("60"));
var x = await tr.GetKeyAsync(FdbKeySelector.LastLessThan(location.Pack(49)));
Console.WriteLine(x);
tr.Set(location.Pack("FOO"), Slice.FromString("BAR"));
}
private async Task Scenario5(IFdbTransaction tr)
{
var location = FdbSubspace.Create(Slice.FromAscii("TEST"));
//tr.Set(location.Pack(42), Slice.FromString("42"));
//tr.Set(location.Pack(50), Slice.FromString("50"));
//tr.Set(location.Pack(60), Slice.FromString("60"));
var x = await tr.GetKeyAsync(FdbKeySelector.LastLessThan(location.Pack(49)));
Console.WriteLine(x);
tr.Set(location.Pack("FOO"), Slice.FromString("BAR"));
}
public virtual Task <Slice> GetKeyAsync(KeySelector selector)
{
ThrowIfDisposed();
return(m_transaction.GetKeyAsync(selector));
}
private async Task<Chunk> GetChunkAtAsync(IFdbTransaction trans, long offset)
{
Contract.Requires(trans != null && offset >= 0);
var chunkKey = await trans.GetKeyAsync(FdbKeySelector.LastLessOrEqual(DataKey(offset))).ConfigureAwait(false);
if (chunkKey.IsNull)
{ // nothing before (sparse)
return default(Chunk);
}
if (chunkKey < DataKey(0))
{ // off beginning
return default(Chunk);
}
long chunkOffset = DataKeyOffset(chunkKey);
Slice chunkData = await trans.GetAsync(chunkKey).ConfigureAwait(false);
if (chunkOffset + chunkData.Count <= offset)
{ // in sparse region after chunk
return default(Chunk);
}
return new Chunk(chunkKey, chunkData, chunkOffset);
}