public void JoinTransaction()
{
TransactionInfo info = TransactionContext.GetRequiredTransactionInfo <TransactionInfo>();
logger.Info($"Grain {grain} is joining transaction {info.TransactionId}.");
// are we already part of the transaction?
if (this.transactions.Contains(info.TransactionId))
{
return;
}
TransactionalResourceVersion readVersion;
if (!TryGetVersion(info.TransactionId, out readVersion))
{
throw new OrleansTransactionVersionDeletedException(info.TransactionId.ToString());
}
if (info.IsReadOnly && readVersion.TransactionId > this.stableVersion)
{
throw new OrleansTransactionUnstableVersionException(info.TransactionId.ToString());
}
info.RecordRead(transactionalResource, readVersion, this.stableVersion);
writeLowerBound = Math.Max(writeLowerBound, info.TransactionId - 1);
if (this.version.TransactionId > info.TransactionId || this.writeLowerBound >= info.TransactionId)
{
throw new OrleansTransactionWaitDieException(info.TransactionId.ToString());
}
TransactionalResourceVersion nextVersion = TransactionalResourceVersion.Create(info.TransactionId,
this.version.TransactionId == info.TransactionId ? this.version.WriteNumber + 1 : 1);
info.RecordWrite(transactionalResource, this.version, this.stableVersion);
this.version = nextVersion;
this.transactions.Remove(info.TransactionId);
}
private bool TryGetVersion(long transactionId, out TransactionalResourceVersion readVersion)
{
readVersion = this.version;
return(this.version.TransactionId <= transactionId);
}