/// <inheritdoc />
public Task <long> GetReadVersionAsync(CancellationToken ct)
{
var future = FdbNative.TransactionGetReadVersion(m_handle);
return(FdbFuture.CreateTaskFromHandle(future,
(h) =>
{
long version;
var err = Fdb.BindingVersion < 620
? FdbNative.FutureGetVersion(h, out version)
: FdbNative.FutureGetInt64(h, out version);
#if DEBUG_TRANSACTIONS
Debug.WriteLine("FdbTransaction[" + m_id + "].GetReadVersion() => err=" + err + ", version=" + version);
#endif
Fdb.DieOnError(err);
return version;
},
ct
));
}
/// <inheritdoc />
public Task <long> GetApproximateSizeAsync(CancellationToken ct)
{
// API was introduced in 6.2
if (Fdb.ApiVersion < 620)
{
throw new NotSupportedException($"The GetApproximateSize method is only available for version 6.2 or greater. Your application has selected API version {Fdb.ApiVersion} which is too low. You willl need to select API version 620 or greater.");
}
//TODO: for lesser version, maybe we could return our own estimation?
var future = FdbNative.TransactionGetReadVersion(m_handle);
return(FdbFuture.CreateTaskFromHandle(future,
(h) =>
{
var err = FdbNative.FutureGetInt64(h, out long size);
#if DEBUG_TRANSACTIONS
Debug.WriteLine("FdbTransaction[" + m_id + "].GetApproximateSize() => err=" + err + ", size=" + size);
#endif
Fdb.DieOnError(err);
return size;
},
ct
));
}