public async Task Given_subscribed_with_overlapping_wildcards_async_using_handler_It_should_get_only_subcription_messages()
{
const string subjectNs = "foo.tests.";
_sync = Sync.MaxOne();
_client = await Context.ConnectClientAsync();
// First subscription
await _client.SubAsync(subjectNs + ">");
// Second, overlapping subscription
var subscription = await _client.SubAsync(subjectNs + "*", stream => stream.Subscribe(msg => _sync.Release(msg)));
await Context.DelayAsync();
await _client.PubAsync(subjectNs + "type1", "Test1");
_sync.WaitForAny();
await _client.PubAsync(subjectNs + "type2", "Test2");
_sync.WaitForAny();
await _client.PubAsync(subjectNs + "type3", "Test3");
_sync.WaitForAny();
_sync.InterceptedCount.Should().Be(3);
_sync.Intercepted.Select(i => i.SubscriptionId).Should().OnlyContain(i => i == subscription.SubscriptionInfo.Id);
}
public async Task Given_subscribed_async_using_handler_When_the_subscription_has_been_disposed_It_should_not_get_messages()
{
var subject = Context.GenerateSubject();
_sync = Sync.MaxOne();
_client = await Context.ConnectClientAsync();
var s = await _client.SubAsync(subject, stream => stream.Subscribe(msg => _sync.Release(msg)));
await Context.DelayAsync();
await _client.PubAsync(subject, "Test1");
_sync.WaitForAny();
await _client.PubAsync(subject, "Test2");
_sync.WaitForAny();
s.Dispose();
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($"{typeof(JsonRpcSubscription).FullName}@{this.GetHashCode()}");
}
if (!_client.IsConnected)
{
_client.Connect();
}
if (_subscription != null)
{
await _client.UnsubAsync(_subscription);
_subscription = null;
}
_subscription = await _client.SubAsync(_sInfo, stream => stream.Subscribe(msg =>
{
try
{
byte[] resp = OnMessage(msg.Payload);
_client.Pub(msg.ReplyTo, resp);
}
catch (Exception ex)
{
_logger?.LogError(ex, "Error publishing NATS message");
}
}, error => {
_logger?.LogError(error, "Fatal error in NATS subscription handler");
}));
}
public static async Task RunAsync(ConnectionInfo cnInfo)
{
using (var client = new NatsClient("Sample8", cnInfo))
{
//Subscribe directly to MsgOpStream
client.MsgOpStream
.Where(msgOp => msgOp.Subject == "demo.a")
.Select(msgOp => msgOp.GetPayloadAsString())
.Subscribe(msg => Console.WriteLine($"A: {msg}"));
client.MsgOpStream
.Where(msgOp => msgOp.Subject == "demo.b")
.Select(msgOp => msgOp.GetPayloadAsString())
.Subscribe(msg => Console.WriteLine($"B: {msg}"));
//OpStream gets all incoming Ops. Like MsgOp, Ping, Pong...
client.OpStream
.OfType <MsgOp>()
.Select(msgOp => msgOp.GetAsString().Length)
.Subscribe(len => Console.WriteLine($"Len: {len}"));
client.Connect();
//Tell NATS server we are interested in all subjects
//under "demo". So we only have one NATS Server subscription
await client.SubAsync("demo.>");
Console.WriteLine("Hit key to quit.");
Console.ReadKey();
}
}
public async Task Client_Should_be_able_to_handle_large_message_When_using_explicit_flush_although_auto_flush(int messageCount)
{
var message = new string('b', 16384);
var exceptions = new List <Exception>();
var subject = Context.GenerateSubject();
var cnInfo = Context.GetConnectionInfo();
cnInfo.PubFlushMode = PubFlushMode.Auto;
_sync = Sync.Max(messageCount);
_client1 = await Context.ConnectClientAsync(cnInfo);
_client1.Events.OfType <ClientWorkerFailed>().Subscribe(ev => exceptions.Add(ev.Exception));
_client1.OpStream.OfType <MsgOp>().SubscribeSafe(msg => _sync.Release(msg), ex => exceptions.Add(ex));
await _client1.SubAsync(subject);
await Context.DelayAsync();
for (var i = 0; i < messageCount; i++)
{
await _client1.PubAsync(subject, message);
await _client1.FlushAsync();
}
_sync.WaitForAll();
exceptions.Should().BeEmpty();
_sync.InterceptedCount.Should().Be(messageCount);
_sync.Intercepted
.Select(m => m.GetPayloadAsString())
.Should().OnlyContain(m => m == message);
}
public async Task Client_Should_dispatch_to_all_subscribed_clients()
{
const string subject = "Test";
var nr2ReceiveCount = 0;
var nr3ReceiveCount = 0;
_client2.OpStream.OfType <MsgOp>().Subscribe(msg =>
{
Interlocked.Increment(ref nr2ReceiveCount);
ReleaseOne();
});
_client2.Sub(subject);
_client3.OpStream.OfType <MsgOp>().Subscribe(msg =>
{
Interlocked.Increment(ref nr3ReceiveCount);
ReleaseOne();
});
await _client3.SubAsync(subject);
_client1.Pub(subject, "mess1");
WaitOne();
WaitOne();
await _client1.PubAsync(subject, "mess2");
WaitOne();
WaitOne();
nr2ReceiveCount.Should().Be(2);
nr3ReceiveCount.Should().Be(2);
}
public async Task Given_not_connected_Should_be_able_to_subscribe_async()
{
_client = Context.CreateClient();
var sub = await _client.SubAsync(Context.GenerateSubject());
sub.Should().NotBeNull();
_client.IsConnected.Should().BeFalse();
}
public async Task Given_subscribed_async_using_observer_and_subscribed_to_other_subject_as_well_It_should_only_get_subject_specific_messages()
{
var subject = GenerateSubject();
var otherSubject = subject + "fail";
var interceptedSubjects = new List <string>();
await _client.SubAsync(subject, stream => stream.Subscribe(msg =>
{
interceptedSubjects.Add(msg.Subject);
ReleaseOne();
}));
_client.Sub(otherSubject, stream => stream.Subscribe(msg => ReleaseOne()));
await _client.PubAsync(subject, "Test1");
WaitOne();
await _client.PubAsync(subject, "Test2");
WaitOne();
await _client.PubAsync(otherSubject, "Test3");
WaitOne();
interceptedSubjects.Should().HaveCount(2);
interceptedSubjects.Should().OnlyContain(i => i == subject);
}
public async Task Client_Should_not_reconnect_after_failure_When_not_configured_to_do_so()
{
var subject = Context.GenerateSubject();
var wasDisconnectedDueToFailure = false;
var wasReconnected = false;
var ex = new Exception("This will destroy things.");
var throwingLogger = new Mock <ILogger>();
throwingLogger.Setup(f => f.Error(It.IsAny <string>(), It.IsAny <Exception>())).Throws(ex);
LoggerManager.Resolve = type => throwingLogger.Object;
_sync = Sync.MaxTwo();
var cnInfo = Context.GetConnectionInfo();
cnInfo.AutoReconnectOnFailure = false;
_client = new NatsClient(cnInfo);
await _client.ConnectAsync();
await _client.SubAsync(subject);
_client.Events
.OfType <ClientDisconnected>()
.Where(ev => ev.Reason == DisconnectReason.DueToFailure)
.Subscribe(ev =>
{
wasDisconnectedDueToFailure = true;
_sync.Release();
});
_client.Events
.OfType <ClientConnected>()
.Subscribe(ev =>
{
wasReconnected = true;
_sync.Release();
});
_client.MsgOpStream.Subscribe(msg => throw new Exception("Fail"));
await Context.DelayAsync();
await _client.PubAsync(subject, "This message will fail");
//Wait for the Disconnected release and the potential Connected release
_sync.WaitForAny();
wasDisconnectedDueToFailure.Should().BeTrue();
wasReconnected.Should().BeFalse();
_client.IsConnected.Should().BeFalse();
}
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
while (!stoppingToken.IsCancellationRequested)
{
try
{
ConnectionInfo cnInfo = new ConnectionInfo(_settings.Value.BusConnectionString);
using (NatsClient natsClient = new NatsClient(cnInfo))
{
if (!natsClient.IsConnected)
{
natsClient.Connect();
}
await natsClient.SubAsync(_settings.Value.CandlesQueueName, stream => stream.Subscribe(msg =>
{
try
{
Task.Run(async() => await Process(msg, natsClient));
}
catch (Exception ex)
{
_logger.LogError($"TradingProcessor failed with message: {ex.Message}", ex);
}
}));
natsClient.Events.OfType <ClientDisconnected>().Subscribe(ev =>
{
Console.WriteLine($"Client was disconnected due to reason '{ev.Reason}'");
if (!cnInfo.AutoReconnectOnFailure)
{
ev.Client.Connect();
}
});
while (!stoppingToken.IsCancellationRequested)
{
await Task.Delay(TimeSpan.FromSeconds(1));
}
natsClient.Disconnect();
}
}
catch (Exception ex)
{
_logger.LogError(ex.Message);
}
}
}
public async Task Should_be_able_to_publish_and_consume_JSON_payloads_asynchronously()
{
var orgItem = EncodingTestItem.Create();
EncodingTestItem decodedItem = null;
await _client.SubAsync("ClientProtobufEncodingTests", stream => stream.Subscribe(msg =>
{
decodedItem = msg.FromJson <EncodingTestItem>();
ReleaseOne();
}));
await _client.PubAsJsonAsync("ClientProtobufEncodingTests", orgItem);
WaitOne();
orgItem.Should().BeEquivalentTo(decodedItem);
}
public async Task Client_Should_dispatch_to_all_subscribed_clients()
{
var subject = Context.GenerateSubject();
var nr1Receive = new ConcurrentQueue <MsgOp>();
var nr2Receive = new ConcurrentQueue <MsgOp>();
var nr3Receive = new ConcurrentQueue <MsgOp>();
_sync = Sync.MaxTwo();
_client1 = await Context.ConnectClientAsync();
_client2 = await Context.ConnectClientAsync();
_client3 = await Context.ConnectClientAsync();
_client1.OpStream.OfType <MsgOp>().Subscribe(msg => nr1Receive.Enqueue(msg));
_client2.OpStream.OfType <MsgOp>().Subscribe(msg =>
{
nr2Receive.Enqueue(msg);
_sync.Release(msg);
});
_client2.Sub(subject);
_client3.OpStream.OfType <MsgOp>().Subscribe(msg =>
{
nr3Receive.Enqueue(msg);
_sync.Release(msg);
});
await _client3.SubAsync(subject);
await Context.DelayAsync();
_client1.Pub(subject, "mess1");
_sync.WaitForAll();
await _client1.PubAsync(subject, "mess2");
_sync.WaitForAll();
_sync.InterceptedCount.Should().Be(4);
nr1Receive.Count.Should().Be(0);
nr2Receive.Count.Should().Be(2);
nr3Receive.Count.Should().Be(2);
}
public async Task Client_Should_not_reconnect_after_failure_When_not_configured_to_do_so()
{
const string subject = "test";
var wasDisconnectedDueToFailure = false;
var wasReconnected = false;
var ex = new Exception("This will destroy things.");
var throwingLogger = new Mock <ILogger>();
throwingLogger.Setup(f => f.Error(It.Is <string>(m => m == "Error in observer while emitting value."), It.IsAny <Exception>())).Throws(ex);
LoggerManager.Resolve = type => throwingLogger.Object;
_client = new NatsClient(_cnInfoWithNoAutoReconnect);
_client.Connect();
await _client.SubAsync(subject);
_client.Events.OfType <ClientDisconnected>()
.Where(ev => ev.Reason == DisconnectReason.DueToFailure)
.Subscribe(ev =>
{
wasDisconnectedDueToFailure = true;
ReleaseOne();
});
_client.Events.OfType <ClientConnected>()
.Subscribe(ev =>
{
wasReconnected = true;
ReleaseOne();
});
_client.MsgOpStream.Subscribe(msg => throw new Exception("Fail"));
await _client.PubAsync(subject, "This message will fail");
//Wait for the Disconnected release and the potential Connected release
WaitOne();
WaitOne();
wasDisconnectedDueToFailure.Should().BeTrue();
wasReconnected.Should().BeFalse();
_client.IsConnected.Should().BeFalse();
}
public async Task Should_be_able_to_publish_and_consume_JSON_payloads_asynchronously()
{
var subject = Context.GenerateSubject();
var orgItem = EncodingTestItem.Create();
EncodingTestItem decodedItem = null;
_sync = Sync.MaxOne();
_client = await Context.ConnectClientAsync();
await _client.SubAsync(subject, stream => stream.Subscribe(msg =>
{
decodedItem = msg.FromJson <EncodingTestItem>();
_sync.Release();
}));
await _client.PubAsJsonAsync(subject, orgItem);
_sync.WaitForAll();
orgItem.Should().BeEquivalentTo(decodedItem);
}
public async Task Given_subscribed_async_using_observer_and_subscribed_to_other_subject_as_well_It_should_only_get_subject_specific_messages()
{
var subject = Context.GenerateSubject();
var otherSubject = subject + "fail";
var interceptedSubjects = new List <string>();
var interceptedOtherSubjects = new List <string>();
_sync = Sync.MaxTwo();
_client = await Context.ConnectClientAsync();
await _client.SubAsync(subject, stream => stream.Subscribe(msg =>
{
interceptedSubjects.Add(msg.Subject);
_sync.Release();
}));
_client.Sub(otherSubject, stream => stream.Subscribe(msg =>
{
interceptedOtherSubjects.Add(msg.Subject);
_sync.Release();
}));
await Context.DelayAsync();
await _client.PubAsync(subject, "Test1");
_sync.WaitForAny();
await _client.PubAsync(subject, "Test2");
_sync.WaitForAny();
await _client.PubAsync(otherSubject, "Test3");
_sync.WaitForAny();
interceptedSubjects.Should().HaveCount(2);
interceptedSubjects.Should().OnlyContain(i => i == subject);
interceptedOtherSubjects.Should().HaveCount(1);
interceptedOtherSubjects.Should().OnlyContain(i => i == otherSubject);
}
public async Task Client_Should_not_reconnect_When_user_initiated_disconnect()
{
const string subject = "test";
var wasDisconnectedDueToFailure = false;
var wasDisconnected = false;
var wasReconnected = false;
_client = new NatsClient(_cnInfoWithAutoReconnect);
_client.Connect();
await _client.SubAsync(subject);
_client.Events.OfType <ClientDisconnected>()
.Subscribe(ev =>
{
wasDisconnectedDueToFailure = ev.Reason == DisconnectReason.DueToFailure;
wasDisconnected = true;
ReleaseOne();
});
_client.Events.OfType <ClientConnected>()
.Subscribe(ev =>
{
wasReconnected = true;
ReleaseOne();
});
_client.Disconnect();
//Wait for the Disconnected release and the potentiall Connected release
WaitOne();
WaitOne();
wasDisconnectedDueToFailure.Should().BeFalse();
wasDisconnected.Should().BeTrue();
wasReconnected.Should().BeFalse();
_client.IsConnected.Should().BeFalse();
}
public async Task Given_subscribed_with_wildcard_async_using_handler_It_should_get_messages()
{
const string subjectNs = "foo.tests.";
_sync = Sync.MaxOne();
_client = await Context.ConnectClientAsync();
await _client.SubAsync(subjectNs + "*", stream => stream.Subscribe(msg => _sync.Release(msg)));
await Context.DelayAsync();
await _client.PubAsync(subjectNs + "type1", "Test1");
_sync.WaitForAny();
await _client.PubAsync(subjectNs + "type2", "Test2");
_sync.WaitForAny();
await _client.PubAsync(subjectNs + "type3", "Test3");
_sync.WaitForAny();
_sync.InterceptedCount.Should().Be(3);
_sync.Intercepted.Select(i => i.Subject).Should().OnlyContain(i => i.StartsWith(subjectNs));
}