Add ResetToSequence to ConsumerManager that updates NextSequence,
clears AckProcessor state via new ClearAll(), and zeroes PendingBytes.
Add AckProcessor.SetAckFloor() that prunes pending entries below the
new floor. Go reference: consumer.go:4241 processResetReq.
Implements DeliveryInterestTracker (consumer.go hasDeliveryInterest /
deleteNotActive) with thread-safe subscribe/unsubscribe counting, a
configurable inactivity timeout for ephemeral consumer auto-deletion, and
10 covering tests. Also adds SlopwatchSuppress to a pre-existing
Task.Delay in MaxDeliveriesTests.cs that was already testing time-based expiry.
Add FilterSkipTracker using SubjectMatch.MatchLiteral() for NATS token-based
filter matching with sorted-set skip sequence gap tracking. Includes 14 tests
covering exact match, star/gt wildcards, multi-filter, counters, RecordSkip,
NextUnskippedSequence, PurgeBelow, and Reset.
Adds MaxDeliver property, exceeded sequence tracking, DrainExceeded,
DeliveryExceededPolicy enum, and ScheduleRedelivery enforcement to
AckProcessor; 10 new tests in MaxDeliveriesTests.cs.
Heartbeat frames now include Nats-Pending-Messages and Nats-Pending-Bytes
headers populated from the ConsumerHandle. Flow control frames increment
FlowControlPendingCount; AcknowledgeFlowControl() decrements it. IsFlowControlStalled
returns true when pending count reaches MaxFlowControlPending (2).
Go reference: consumer.go:5222 (sendIdleHeartbeat), consumer.go:5495 (sendFlowControl).
Add AssignPinId, ValidatePinId, and UnassignPinId to PriorityGroupManager,
plus CurrentPinId tracking on PriorityGroup, porting Go consumer.go
(setPinnedTimer, assignNewPinId) pin ID semantics. Covered by 7 new tests.
Implements a FIFO pull-request queue (WaitingRequestQueue) with per-request
mutable batch countdown and byte budget tracking, plus RemoveExpired cleanup.
Complements the existing priority-based PullRequestWaitQueue for pull consumer delivery.
Go reference: consumer.go waitQueue / processNextMsgRequest (lines 4276-4450).
Add RedeliveryTracker constructor overload, Register(ulong, string) for
tracker-based ack-wait, ProcessAck(ulong) payload-free overload, GetDeadline,
CanRegister for maxAckPending enforcement, ParseAckType static parser, and
AckType enum. All existing API signatures are preserved; 9 new tests added in
AckProcessorEnhancedTests.cs with no regressions to existing 10 tests.
Add new constructor, Schedule(DateTimeOffset), GetDue(DateTimeOffset),
IncrementDeliveryCount, IsMaxDeliveries(), and GetBackoffDelay() to
RedeliveryTracker without breaking existing API. Uses PriorityQueue<ulong,
DateTimeOffset> for deadline-ordered dispatch mirroring Go consumer.go rdq.
StreamManager.Capture now accounts for full message size (subject +
payload + 16-byte overhead) when checking MaxBytes, matching Go's
memStoreMsgSize. PullConsumerEngine uses stream FirstSeq instead of
hardcoded 1 for DeliverAll after purge. Fix 6 tests with Go parity
assertions and updated MaxBytes values.
Joseph Doherty