public void OnStart()
{
service.OnStart(this);
CountersReader counters = aeron.CountersReader();
int recoveryCounterId = AwaitRecoveryCounterId(counters);
isRecovering = true;
CheckForSnapshot(counters, recoveryCounterId);
CheckForReplay(counters, recoveryCounterId);
isRecovering = false;
JoinActiveLog(counters);
roleCounter = AwaitClusterRoleCounter(counters);
role = (ClusterRole)roleCounter.Get();
if (ClusterRole.Leader == role)
{
foreach (ClientSession session in sessionByIdMap.Values)
{
session.Connect(aeron);
}
}
}
private void JoinActiveLog()
{
CountersReader counters = aeron.CountersReader();
int commitPositionId = _activeLogEvent.commitPositionId;
if (!CommitPos.IsActive(counters, commitPositionId))
{
throw new ClusterException("CommitPos counter not active: " + commitPositionId);
}
Subscription logSubscription = aeron.AddSubscription(_activeLogEvent.channel, _activeLogEvent.streamId);
_consensusModuleProxy.Ack(CommitPos.GetLogPosition(counters, commitPositionId), ackId++, serviceId);
Image image = AwaitImage(_activeLogEvent.sessionId, logSubscription);
heartbeatCounter.SetOrdered(epochClock.Time());
_activeLogEvent = null;
logAdapter = new BoundedLogAdapter(image, new ReadableCounter(counters, commitPositionId), this);
Role((ClusterRole)roleCounter.Get());
foreach (ClientSession session in sessionByIdMap.Values)
{
if (ClusterRole.Leader == role)
{
if (ctx.IsRespondingService())
{
session.Connect(aeron);
}
session.ResetClosing();
}
else
{
session.Disconnect();
}
}
}
public int DoWork()
{
int workCount = 0;
if (CheckForClockTick())
{
PollServiceAdapter();
workCount += 1;
}
if (null != logAdapter.Image())
{
int polled = logAdapter.Poll(commitPosition.Get());
if (0 == polled && logAdapter.IsDone())
{
CloseLog();
}
workCount += polled;
}
return(workCount);
}
private void JoinActiveLog()
{
if (null != logAdapter)
{
if (!logAdapter.IsCaughtUp())
{
return;
}
logAdapter.Dispose();
logAdapter = null;
}
CountersReader counters = aeron.CountersReader();
int commitPositionId = newActiveLogEvent.commitPositionId;
if (!CommitPos.IsActive(counters, commitPositionId))
{
throw new System.InvalidOperationException("CommitPos counter not active: " + commitPositionId);
}
int logSessionId = newActiveLogEvent.sessionId;
leadershipTermId = newActiveLogEvent.leadershipTermId;
termBaseLogPosition = CommitPos.GetTermBaseLogPosition(counters, commitPositionId);
Subscription logSubscription = aeron.AddSubscription(newActiveLogEvent.channel, newActiveLogEvent.streamId);
if (newActiveLogEvent.ackBeforeImage)
{
serviceControlPublisher.AckAction(termBaseLogPosition, leadershipTermId, serviceId, ClusterAction.READY);
}
Image image = AwaitImage(logSessionId, logSubscription);
heartbeatCounter.SetOrdered(epochClock.Time());
if (!newActiveLogEvent.ackBeforeImage)
{
serviceControlPublisher.AckAction(termBaseLogPosition, leadershipTermId, serviceId, ClusterAction.READY);
}
newActiveLogEvent = null;
logAdapter = new BoundedLogAdapter(image, new ReadableCounter(counters, commitPositionId), this);
Role((ClusterRole)roleCounter.Get());
foreach (ClientSession session in sessionByIdMap.Values)
{
if (ClusterRole.Leader == role)
{
session.Connect(aeron);
}
else
{
session.Disconnect();
}
}
}
public int Poll()
{
return(image.BoundedControlledPoll(fragmentAssembler, upperBound.Get(), FRAGMENT_LIMIT));
}
public bool IsCaughtUp()
{
return(image.Position() >= upperBound.Get());
}