public async Task Given_subscribed_When_unsubscribing_sync_It_should_not_get_any_further_messages()
{
var subject = GenerateSubject();
var interceptCount = 0;
var subscription = _client.Sub(subject, stream => stream.Subscribe(NatsObserver.Delegating <MsgOp>(msg =>
{
Interlocked.Increment(ref interceptCount);
ReleaseOne();
})));
await _client.PubAsync(subject, "Test1");
WaitOne();
await _client.PubAsync(subject, "Test2");
WaitOne();
await _client.UnsubAsync(subscription.SubscriptionInfo);
await _client.PubAsync(subject, "Test3");
WaitOne();
interceptCount.Should().Be(2);
}
public async Task Given_subscribed_When_unsubscribing_async_It_should_not_get_any_further_messages()
{
var subject = Context.GenerateSubject();
_sync = Sync.MaxOne();
_client = await Context.ConnectClientAsync();
var s = _client.Sub(subject, stream => stream.Subscribe(NatsObserver.Delegating <MsgOp>(msg => _sync.Release(msg))));
await Context.DelayAsync();
await _client.PubAsync(subject, "Test1");
_sync.WaitForAny();
await _client.PubAsync(subject, "Test2");
_sync.WaitForAny();
await _client.UnsubAsync(s.SubscriptionInfo);
await _client.PubAsync(subject, "Test3");
await Context.DelayAsync();
_sync.InterceptedCount.Should().Be(2);
}
/// <summary>
/// Starts the subscription
/// </summary>
/// <summary>
/// Starts the subscription
/// </summary>
public async Task Start()
{
if (_disposed)
{
throw new ObjectDisposedException($"{typeof(JsonRpcSubscription).FullName}@{this.GetHashCode()}");
}
if (!_client.IsConnected)
{
_client.Connect();
}
if (_subscription != null)
{
await _client.UnsubAsync(_subscription);
_subscription = null;
}
_subscription = await _client.SubAsync(_sInfo, stream => stream.Subscribe(msg =>
{
try
{
byte[] resp = OnMessage(msg.Payload);
_client.Pub(msg.ReplyTo, resp);
}
catch (Exception ex)
{
_logger?.LogError(ex, "Error publishing NATS message");
}
}, error => {
_logger?.LogError(error, "Fatal error in NATS subscription handler");
}));
}
public async Task Client_Should_be_able_to_unsub_from_a_subject()
{
var subject = Context.GenerateSubject();
var nr1Received = new ConcurrentQueue <MsgOp>();
var nr2Received = new ConcurrentQueue <MsgOp>();
var nr3Received = new ConcurrentQueue <MsgOp>();
var subInfo1 = new SubscriptionInfo(subject);
var subInfo2 = new SubscriptionInfo(subject);
var subInfo3 = new SubscriptionInfo(subject);
_sync = Sync.MaxThree();
await ConnectAllClients();
_client1.OpStream.OfType <MsgOp>().Subscribe(msg =>
{
_client1.Unsub(subInfo1);
nr1Received.Enqueue(msg);
_sync.Release(msg);
});
_client1.Sub(subInfo1);
_client2.OpStream.OfType <MsgOp>().Subscribe(async msg =>
{
await _client2.UnsubAsync(subInfo2);
nr2Received.Enqueue(msg);
_sync.Release(msg);
});
_client2.Sub(subInfo2);
_client3.OpStream.OfType <MsgOp>().Subscribe(msg =>
{
nr3Received.Enqueue(msg);
_sync.Release(msg);
});
_client3.Sub(subInfo3);
await Context.DelayAsync();
_client1.Pub(subject, "mess1");
_sync.WaitForAll();
_client3.Unsub(subInfo3);
await Context.DelayAsync();
_client1.Pub(subject, "mess2");
await Context.DelayAsync();
_sync.InterceptedCount.Should().Be(3);
nr1Received.Should().HaveCount(1);
nr2Received.Should().HaveCount(1);
nr3Received.Should().HaveCount(1);
}
public async Task Client_Should_be_able_to_unsub_from_a_subject()
{
const string subject = "Test";
var nr1ReceiveCount = 0;
var nr2ReceiveCount = 0;
var nr3ReceiveCount = 0;
var subInfo1 = new SubscriptionInfo(subject);
var subInfo2 = new SubscriptionInfo(subject);
var subInfo3 = new SubscriptionInfo(subject);
_client1.OpStream.OfType <MsgOp>().Subscribe(msg =>
{
_client1.Unsub(subInfo1);
Interlocked.Increment(ref nr1ReceiveCount);
ReleaseOne();
});
_client1.Sub(subInfo1);
_client2.OpStream.OfType <MsgOp>().Subscribe(async msg =>
{
await _client2.UnsubAsync(subInfo2);
Interlocked.Increment(ref nr2ReceiveCount);
ReleaseOne();
});
_client2.Sub(subInfo2);
_client3.OpStream.OfType <MsgOp>().Subscribe(msg =>
{
Interlocked.Increment(ref nr3ReceiveCount);
ReleaseOne();
});
_client3.Sub(subInfo3);
_client1.Pub(subject, "mess1");
WaitOne();
WaitOne();
WaitOne();
_client3.Unsub(subInfo3);
await DelayAsync();
_client1.Pub(subject, "mess2");
await DelayAsync();
nr1ReceiveCount.Should().Be(1);
nr2ReceiveCount.Should().Be(1);
nr3ReceiveCount.Should().Be(1);
}