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feat: enforce jetstream ack and redelivery semantics

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This commit is contained in:
Joseph Doherty
2026-02-23 06:09:26 -05:00
parent fecb51095f
commit d3aad48096
7 changed files with 104 additions and 7 deletions
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17
tests/NATS.Server.Tests/JetStreamAckRedeliveryTests.cs Normal file
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@@ -0,0 +1,17 @@
namespace NATS.Server.Tests;
public class JetStreamAckRedeliveryTests
{
[Fact]
public async Task Unacked_message_is_redelivered_after_ack_wait()
{
await using var fixture = await JetStreamApiFixture.StartWithAckExplicitConsumerAsync(ackWaitMs: 50);
await fixture.PublishAndGetAckAsync("orders.created", "1");
var first = await fixture.FetchAsync("ORDERS", "PULL", batch: 1);
var second = await fixture.FetchAfterDelayAsync("ORDERS", "PULL", delayMs: 75, batch: 1);
second.Messages.Single().Sequence.ShouldBe(first.Messages.Single().Sequence);
second.Messages.Single().Redelivered.ShouldBeTrue();
}
}

18
tests/NATS.Server.Tests/JetStreamApiFixture.cs
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@@ -53,6 +53,14 @@ internal sealed class JetStreamApiFixture : IAsyncDisposable
return fixture;
}
public static async Task<JetStreamApiFixture> StartWithAckExplicitConsumerAsync(int ackWaitMs)
{
var fixture = await StartWithStreamAsync("ORDERS", "orders.*");
_ = await fixture.CreateConsumerAsync("ORDERS", "PULL", "orders.created",
ackPolicy: AckPolicy.Explicit, ackWaitMs: ackWaitMs);
return fixture;
}
public Task<PubAck> PublishAndGetAckAsync(string subject, string payload, string? msgId = null, bool expectError = false)
{
if (_publisher.TryCapture(subject, Encoding.UTF8.GetBytes(payload), msgId, out var ack))
@@ -83,9 +91,9 @@ internal sealed class JetStreamApiFixture : IAsyncDisposable
return _streamManager.GetStateAsync(streamName, default).AsTask();
}
public Task<JetStreamApiResponse> CreateConsumerAsync(string stream, string durableName, string filterSubject, bool push = false, int heartbeatMs = 0)
public Task<JetStreamApiResponse> CreateConsumerAsync(string stream, string durableName, string filterSubject, bool push = false, int heartbeatMs = 0, AckPolicy ackPolicy = AckPolicy.None, int ackWaitMs = 30_000)
{
var payload = $@"{{""durable_name"":""{durableName}"",""filter_subject"":""{filterSubject}"",""push"":{push.ToString().ToLowerInvariant()},""heartbeat_ms"":{heartbeatMs}}}";
var payload = $@"{{""durable_name"":""{durableName}"",""filter_subject"":""{filterSubject}"",""push"":{push.ToString().ToLowerInvariant()},""heartbeat_ms"":{heartbeatMs},""ack_policy"":""{ackPolicy.ToString().ToLowerInvariant()}"",""ack_wait_ms"":{ackWaitMs}}}";
return RequestLocalAsync($"$JS.API.CONSUMER.CREATE.{stream}.{durableName}", payload);
}
@@ -100,6 +108,12 @@ internal sealed class JetStreamApiFixture : IAsyncDisposable
return _consumerManager.FetchAsync(stream, durableName, batch, _streamManager, default).AsTask();
}
public async Task<PullFetchBatch> FetchAfterDelayAsync(string stream, string durableName, int delayMs, int batch)
{
await Task.Delay(delayMs);
return await FetchAsync(stream, durableName, batch);
}
public Task<PushFrame> ReadPushFrameAsync(string stream = "ORDERS", string durableName = "PUSH")
{
var frame = _consumerManager.ReadPushFrame(stream, durableName);