private void OnVoterConfirmation()
{
TransactionOperationContext context;
if (_hasNewTopology.Lower())
{
ClusterTopology clusterTopology;
using (_engine.ContextPool.AllocateOperationContext(out context))
using (context.OpenReadTransaction())
{
clusterTopology = _engine.GetTopology(context);
}
if (clusterTopology.Contains(_engine.LeaderTag) == false)
{
TaskExecutor.CompleteAndReplace(ref _newEntriesArrived);
_engine.SetNewState(RachisState.Passive, this, Term,
"I was kicked out of the cluster and moved to passive mode");
return;
}
RefreshAmbassadors(clusterTopology);
}
var maxIndexOnQuorum = GetMaxIndexOnQuorum(VotersMajority);
if (_lastCommit >= maxIndexOnQuorum ||
maxIndexOnQuorum == 0)
{
return; // nothing to do here
}
bool changedFromLeaderElectToLeader;
using (_engine.ContextPool.AllocateOperationContext(out context))
using (context.OpenWriteTransaction())
{
_lastCommit = _engine.GetLastCommitIndex(context);
if (_lastCommit >= maxIndexOnQuorum ||
maxIndexOnQuorum == 0)
{
return; // nothing to do here
}
if (_engine.GetTermForKnownExisting(context, maxIndexOnQuorum) < Term)
{
return;// can't commit until at least one entry from our term has been published
}
changedFromLeaderElectToLeader = _engine.TakeOffice();
maxIndexOnQuorum = _engine.Apply(context, maxIndexOnQuorum, this, Stopwatch.StartNew());
context.Transaction.Commit();
_lastCommit = maxIndexOnQuorum;
}
foreach (var kvp in _entries)
{
if (kvp.Key > _lastCommit)
{
continue;
}
if (_entries.TryRemove(kvp.Key, out CommandState value))
{
TaskExecutor.Execute(o =>
{
var tuple = (CommandState)o;
if (tuple.OnNotify != null)
{
tuple.OnNotify(tuple.TaskCompletionSource);
return;
}
tuple.TaskCompletionSource.TrySetResult((tuple.CommandIndex, tuple.Result));
}, value);
}
}
if (_entries.Count != 0)
{
// we have still items to process, run them in 1 node cluster
// and speed up the followers ambassadors if they can
_newEntry.Set();
}
if (changedFromLeaderElectToLeader)
{
_engine.LeaderElectToLeaderChanged();
}
}
