protected override void DoBeforeConsuming(ConsumerLeaseKey key, long correlationId)
{
ISchedulePolicy noEndpointSchedulePolicy = new ExponentialSchedulePolicy(Config.NoEndpointWaitBaseMillis, Config.NoEndpointWaitMaxMillis);
pullMessagesTask.WriteFullFence(new DefaultPullMessagesTask(correlationId, noEndpointSchedulePolicy, this));
}
private void StartConsuming(ConsumerLeaseKey key, long correlationId)
{
ConsumerNotifier.Register(correlationId, Context);
DoBeforeConsuming(key, correlationId);
msgs.Clear();
ISchedulePolicy noMessageSchedulePolicy = new ExponentialSchedulePolicy(Config.NoMessageWaitBaseMillis, Config.NoMessageWaitMaxMillis);
while (!IsClosed() && !leaseRef.ReadFullFence().Expired)
{
try
{
// if leaseRemainingTime < stopConsumerTimeMillsBeforLeaseExpired, stop
if (leaseRef.ReadFullFence().RemainingTime <= Config.StopConsumerTimeMillsBeforLeaseExpired)
{
break;
}
if (msgs.Count == 0)
{
SchedulePullMessagesTask();
}
if (msgs.Count != 0)
{
ConsumeMessages(correlationId);
noMessageSchedulePolicy.Succeess();
}
else
{
noMessageSchedulePolicy.Fail(true);
}
}
catch (Exception e)
{
log.Error(string.Format("Exception occurred while consuming message(topic={0}, partition={1}, groupId={2}, sessionId={3})",
Context.Topic.Name, PartitionId, Context.GroupId, Context.SessionId), e);
}
}
ConsumerNotifier.Deregister(correlationId);
leaseRef.WriteFullFence(null);
DoAfterConsuming(key, correlationId);
}