public LeaseTxResult Write(Ballot ballot, Lease lease)
{
var ackFilter = new LeaderElectionMessageFilter(ballot, m => m.GetPayload<LeaseAckWriteMessage>(), synodConfig);
var nackFilter = new LeaderElectionMessageFilter(ballot, m => m.GetPayload<LeaseNackWriteMessage>(), synodConfig);
var awaitableAckFilter = new AwaitableMessageStreamFilter(ackFilter.Match, m => m.GetPayload<LeaseAckWriteMessage>(), GetQuorum());
var awaitableNackFilter = new AwaitableMessageStreamFilter(nackFilter.Match, m => m.GetPayload<LeaseNackWriteMessage>(), GetQuorum());
using (ackWriteStream.Subscribe(awaitableAckFilter))
{
using (nackWriteStream.Subscribe(awaitableNackFilter))
{
intercomMessageHub.Broadcast(CreateWriteMessage(ballot, lease));
var index = WaitHandle.WaitAny(new[] {awaitableAckFilter.Filtered, awaitableNackFilter.Filtered},
leaseConfig.NodeResponseTimeout);
if (ReadNotAcknowledged(index))
{
return new LeaseTxResult {TxOutcome = TxOutcome.Abort};
}
return new LeaseTxResult
{
TxOutcome = TxOutcome.Commit,
// NOTE: needed???
Lease = lease
};
}
}
}
public LeaseTxResult Read(Ballot ballot)
{
var ackFilter = new LeaderElectionMessageFilter(ballot, m => m.GetPayload<LeaseAckReadMessage>(), synodConfig);
var nackFilter = new LeaderElectionMessageFilter(ballot, m => m.GetPayload<LeaseNackReadMessage>(), synodConfig);
var awaitableAckFilter = new AwaitableMessageStreamFilter(ackFilter.Match, m => m.GetPayload<LeaseAckReadMessage>(), GetQuorum());
var awaitableNackFilter = new AwaitableMessageStreamFilter(nackFilter.Match, m => m.GetPayload<LeaseNackReadMessage>(), GetQuorum());
using (ackReadStream.Subscribe(awaitableAckFilter))
{
using (nackReadStream.Subscribe(awaitableNackFilter))
{
var message = CreateReadMessage(ballot);
intercomMessageHub.Broadcast(message);
var index = WaitHandle.WaitAny(new[] {awaitableAckFilter.Filtered, awaitableNackFilter.Filtered},
leaseConfig.NodeResponseTimeout);
if (ReadNotAcknowledged(index))
{
return new LeaseTxResult {TxOutcome = TxOutcome.Abort};
}
var lease = awaitableAckFilter
.MessageStream
.Select(m => m.GetPayload<LeaseAckReadMessage>())
.Max(p => CreateLastWrittenLease(p))
.Lease;
return new LeaseTxResult
{
TxOutcome = TxOutcome.Commit,
Lease = lease
};
}
}
}
