public byte[] Get(Span <byte> key)
{
if (_manifest == null)
{
throw new InvalidOperationException("No manifest for database. Did you open it?");
}
if (_newMemCache == null)
{
throw new InvalidOperationException("No current memory cache for database. Did you open it?");
}
ResultStatus result = _newMemCache.Get(key);
if (result.State == ResultState.Deleted || result.State == ResultState.Exist)
{
if (result.Data == ReadOnlySpan <byte> .Empty)
{
return(null);
}
return(result.Data.ToArray());
}
result = _manifest.Get(key);
if (result.Data == ReadOnlySpan <byte> .Empty)
{
return(null);
}
return(result.Data.ToArray());
}
public byte[] Get(Span <byte> key)
{
_dbLock.EnterReadLock();
try
{
if (_manifest == null)
{
throw new InvalidOperationException("No manifest for database. Did you open it?");
}
if (_memCache == null)
{
throw new InvalidOperationException("No current memory cache for database. Did you open it?");
}
ResultStatus result = _memCache.Get(key);
if (result.State == ResultState.Deleted || result.State == ResultState.Exist)
{
if (result.Data == ReadOnlySpan <byte> .Empty)
{
return(null);
}
return(result.Data.ToArray());
}
MemCache imm = _immutableMemCache;
if (imm != null)
{
result = imm.Get(key);
if (result.State == ResultState.Deleted || result.State == ResultState.Exist)
{
if (result.Data == ReadOnlySpan <byte> .Empty)
{
return(null);
}
return(result.Data.ToArray());
}
}
result = _manifest.Get(key);
if (result.Data == ReadOnlySpan <byte> .Empty)
{
return(null);
}
return(result.Data.ToArray());
}
finally
{
_dbLock.ExitReadLock();
}
}