public void TestOrderedConsumerAsync()
{
Console.SetOut(new ConsoleWriter(output));
Context.RunInJsServer(c =>
{
// Setup
IJetStream js = c.CreateJetStreamContext();
string subject = Subject(222);
CreateMemoryStream(c, Stream(222), subject);
// Get this in place before any subscriptions are made
JetStream.PushMessageManagerFactoryImpl =
(conn, so, cc, queueMode, syncMode) =>
new OrderedTestDropSimulator(conn, so, cc, queueMode, syncMode);
// The options will be used in various ways
PushSubscribeOptions pso = PushSubscribeOptions.Builder().WithOrdered(true).Build();
// Test queue exception
void DummyTestHandler(object sender, MsgHandlerEventArgs args)
{
}
NATSJetStreamClientException e = Assert.Throws <NATSJetStreamClientException>(() => js.PushSubscribeAsync(subject, QUEUE, DummyTestHandler, false, pso));
Assert.Contains(JsSubOrderedNotAllowOnQueues.Id, e.Message);
// Setup async subscription
CountdownEvent latch = new CountdownEvent(6);
InterlockedInt received = new InterlockedInt();
InterlockedLong[] ssFlags = new InterlockedLong[6];
InterlockedLong[] csFlags = new InterlockedLong[6];
void TestHandler(object sender, MsgHandlerEventArgs args)
{
int i = received.Increment() - 1;
ssFlags[i] = new InterlockedLong((long)args.msg.MetaData.StreamSequence);
csFlags[i] = new InterlockedLong((long)args.msg.MetaData.ConsumerSequence);
latch.Signal();
}
js.PushSubscribeAsync(subject, TestHandler, false, pso);
Thread.Sleep(1000);
// Published messages will be intercepted by the OrderedTestDropSimulator
JsPublish(js, subject, 101, 6);
// wait for the messages
latch.Wait();
// Loop through the messages to make sure I get stream sequence 1 to 6
ulong expectedStreamSeq = 1;
while (expectedStreamSeq <= 6)
{
int idx = (int)expectedStreamSeq - 1;
Assert.Equal(expectedStreamSeq, (ulong)ssFlags[idx].Read());
Assert.Equal(ExpectedConSeqNums[idx], (ulong)csFlags[idx].Read());
++expectedStreamSeq;
}
});
}
public void TestQueueSubWorkflow()
{
Context.RunInJsServer(c =>
{
// create the stream.
CreateDefaultTestStream(c);
// Create our JetStream context.
IJetStream js = c.CreateJetStreamContext();
// Setup the subscribers
// - the PushSubscribeOptions can be re-used since all the subscribers are the same
// - use a concurrent integer to track all the messages received
// - have a list of subscribers and threads so I can track them
PushSubscribeOptions pso = PushSubscribeOptions.Builder().WithDurable(DURABLE).Build();
InterlockedLong allReceived = new InterlockedLong();
IList <JsQueueSubscriber> subscribers = new List <JsQueueSubscriber>();
IList <Thread> subThreads = new List <Thread>();
for (int id = 1; id <= 3; id++)
{
// setup the subscription
IJetStreamPushSyncSubscription sub = js.PushSubscribeSync(SUBJECT, QUEUE, pso);
// create and track the runnable
JsQueueSubscriber qs = new JsQueueSubscriber(100, js, sub, allReceived);
subscribers.Add(qs);
// create, track and start the thread
Thread t = new Thread(qs.Run);
subThreads.Add(t);
t.Start();
}
c.Flush(DefaultTimeout); // flush outgoing communication with/to the server
// create and start the publishing
Thread pubThread = new Thread(new JsPublisher(js, 100).Run);
pubThread.Start();
// wait for all threads to finish
pubThread.Join(5000);
foreach (Thread t in subThreads)
{
t.Join(5000);
}
ISet <string> uniqueDatas = new HashSet <string>();
// count
int count = 0;
foreach (JsQueueSubscriber qs in subscribers)
{
int r = qs.received;
Assert.True(r > 0);
count += r;
foreach (string s in qs.datas)
{
Assert.True(uniqueDatas.Add(s));
}
}
Assert.Equal(100, count);
});
}
public void TestDeliverSubjectValidation()
{
Assert.Null(PushSubscribeOptions.Builder()
.WithDeliverSubject(null)
.WithConfiguration(ConsumerConfiguration.Builder().WithDeliverSubject(null).Build())
.Build()
.DeliverSubject);
Assert.Equal("y", PushSubscribeOptions.Builder()
.WithDeliverSubject(null)
.WithConfiguration(ConsumerConfiguration.Builder().WithDeliverSubject("y").Build())
.Build()
.DeliverSubject);
Assert.Equal("x", PushSubscribeOptions.Builder()
.WithDeliverSubject("x")
.WithConfiguration(ConsumerConfiguration.Builder().WithDeliverSubject(null).Build())
.Build()
.DeliverSubject);
Assert.Equal("x", PushSubscribeOptions.Builder()
.WithDeliverSubject("x")
.WithConfiguration(ConsumerConfiguration.Builder().WithDeliverSubject("x").Build())
.Build()
.DeliverSubject);
Assert.Throws <NATSJetStreamClientException>(() => PushSubscribeOptions.Builder()
.WithDeliverSubject("x")
.WithConfiguration(ConsumerConfiguration.Builder().WithDeliverSubject("y").Build())
.Build());
}
private void ChangeExPush(IJetStream js, ConsumerConfiguration.ConsumerConfigurationBuilder builder, String changedField)
{
NATSJetStreamClientException e = Assert.Throws <NATSJetStreamClientException>(
() => js.PushSubscribeSync(SUBJECT, PushSubscribeOptions.Builder().WithConfiguration(builder.Build()).Build()));
_ChangeEx(e, changedField);
}
public void TestDurableValidation()
{
// push
Assert.Null(PushSubscribeOptions.Builder()
.WithDurable(null)
.WithConfiguration(ConsumerConfiguration.Builder().WithDurable(null).Build())
.Build()
.Durable);
Assert.Equal("y", PushSubscribeOptions.Builder()
.WithDurable(null)
.WithConfiguration(ConsumerConfiguration.Builder().WithDurable("y").Build())
.Build()
.Durable);
Assert.Equal("x", PushSubscribeOptions.Builder()
.WithDurable("x")
.WithConfiguration(ConsumerConfiguration.Builder().WithDurable(null).Build())
.Build()
.Durable);
Assert.Equal("x", PushSubscribeOptions.Builder()
.WithDurable("x")
.WithConfiguration(ConsumerConfiguration.Builder().WithDurable("x").Build())
.Build()
.Durable);
Assert.Throws <NATSJetStreamClientException>(() => PushSubscribeOptions.Builder()
.WithDurable("x")
.WithConfiguration(ConsumerConfiguration.Builder().WithDurable("y").Build())
.Build());
Assert.Null(PushSubscribeOptions.Builder().Build().Durable);
// pull
Assert.Equal("y", PullSubscribeOptions.Builder()
.WithDurable(null)
.WithConfiguration(ConsumerConfiguration.Builder().WithDurable("y").Build())
.Build()
.Durable);
Assert.Equal("x", PullSubscribeOptions.Builder()
.WithDurable("x")
.WithConfiguration(ConsumerConfiguration.Builder().WithDurable(null).Build())
.Build()
.Durable);
Assert.Equal("x", PullSubscribeOptions.Builder()
.WithDurable("x")
.WithConfiguration(ConsumerConfiguration.Builder().WithDurable("x").Build())
.Build()
.Durable);
Assert.Throws <NATSJetStreamClientException>(() => PullSubscribeOptions.Builder()
.WithDurable("x")
.WithConfiguration(ConsumerConfiguration.Builder().WithDurable("y").Build())
.Build());
}
public void TestPushSyncFlowControl()
{
InterlockedInt fcps = new InterlockedInt();
Action <Options> optionsModifier = opts =>
{
opts.FlowControlProcessedEventHandler = (sender, args) => { fcps.Increment(); };
};
Context.RunInJsServer(new TestServerInfo(TestSeedPorts.AutoPort.Increment()), optionsModifier, c =>
{
// create the stream.
CreateDefaultTestStream(c);
// Create our JetStream context.
IJetStream js = c.CreateJetStreamContext();
byte[] data = new byte[8192];
int MSG_COUNT = 1000;
for (int x = 100_000; x < MSG_COUNT + 100_000; x++)
{
byte[] fill = Encoding.ASCII.GetBytes("" + x);
Array.Copy(fill, 0, data, 0, 6);
js.Publish(new Msg(SUBJECT, data));
}
InterlockedInt count = new InterlockedInt();
HashSet <string> set = new HashSet <string>();
ConsumerConfiguration cc = ConsumerConfiguration.Builder().WithFlowControl(1000).Build();
PushSubscribeOptions pso = PushSubscribeOptions.Builder().WithConfiguration(cc).Build();
IJetStreamPushSyncSubscription ssub = js.PushSubscribeSync(SUBJECT, pso);
for (int x = 0; x < MSG_COUNT; x++)
{
Msg msg = ssub.NextMessage(1000);
byte[] fill = new byte[6];
Array.Copy(msg.Data, 0, fill, 0, 6);
string id = Encoding.ASCII.GetString(fill);
if (set.Add(id))
{
count.Increment();
}
msg.Ack();
}
Assert.Equal(MSG_COUNT, count.Read());
Assert.True(fcps.Read() > 0);
});
}
public void TestJetStreamPushEphemeral(string deliverSubject)
{
Context.RunInJsServer(c =>
{
// create the stream.
CreateDefaultTestStream(c);
// Create our JetStream context.
IJetStream js = c.CreateJetStreamContext();
// publish some messages
JsPublish(js, SUBJECT, 1, 5);
// Build our subscription options.
PushSubscribeOptions options = PushSubscribeOptions.Builder()
.WithDeliverSubject(deliverSubject)
.Build();
// Subscription 1
IJetStreamPushSyncSubscription sub = js.PushSubscribeSync(SUBJECT, options);
AssertSubscription(sub, STREAM, null, deliverSubject, false);
c.Flush(DefaultTimeout); // flush outgoing communication with/to the server
IList <Msg> messages1 = ReadMessagesAck(sub);
int total = messages1.Count;
ValidateRedAndTotal(5, messages1.Count, 5, total);
// read again, nothing should be there
IList <Msg> messages0 = ReadMessagesAck(sub);
total += messages0.Count;
ValidateRedAndTotal(0, messages0.Count, 5, total);
sub.Unsubscribe();
// Subscription 2
sub = js.PushSubscribeSync(SUBJECT, options);
c.Flush(DefaultTimeout); // flush outgoing communication with/to the server
// read what is available, same messages
IList <Msg> messages2 = ReadMessagesAck(sub);
total = messages2.Count;
ValidateRedAndTotal(5, messages2.Count, 5, total);
// read again, nothing should be there
messages0 = ReadMessagesAck(sub);
total += messages0.Count;
ValidateRedAndTotal(0, messages0.Count, 5, total);
AssertSameMessages(messages1, messages2);
});
}
public void TestJetStreamSubscribeErrors()
{
Context.RunInJsServer(c =>
{
IJetStream js = c.CreateJetStreamContext();
// stream not found
PushSubscribeOptions psoInvalidStream = PushSubscribeOptions.Builder().WithStream(STREAM).Build();
Assert.Throws <NATSJetStreamException>(() => js.PushSubscribeSync(SUBJECT, psoInvalidStream));
void AssertThrowsForSubject(Func <object> testCode)
{
ArgumentException ae = Assert.Throws <ArgumentException>(testCode);
Assert.StartsWith("Subject", ae.Message);
}
void AssertThrowsForQueue(Func <object> testCode)
{
ArgumentException ae = Assert.Throws <ArgumentException>(testCode);
Assert.StartsWith("Queue", ae.Message);
}
void AssertThrowsForHandler(Func <object> testCode)
{
ArgumentNullException ae = Assert.Throws <ArgumentNullException>(testCode);
Assert.Equal("Handler", ae.ParamName);
}
// subject
AssertThrowsForSubject(() => js.PushSubscribeSync(HasSpace));
AssertThrowsForSubject(() => js.PushSubscribeSync(null, (PushSubscribeOptions)null));
AssertThrowsForSubject(() => js.PushSubscribeSync(HasSpace, Plain));
AssertThrowsForSubject(() => js.PushSubscribeSync(null, Plain, null));
AssertThrowsForSubject(() => js.PushSubscribeAsync(HasSpace, null, false));
AssertThrowsForSubject(() => js.PushSubscribeAsync(HasSpace, null, false, null));
AssertThrowsForSubject(() => js.PushSubscribeAsync(HasSpace, Plain, null, false));
AssertThrowsForSubject(() => js.PushSubscribeAsync(HasSpace, Plain, null, false, null));
// queue
AssertThrowsForQueue(() => js.PushSubscribeSync(Plain, HasSpace));
AssertThrowsForQueue(() => js.PushSubscribeSync(Plain, HasSpace, null));
AssertThrowsForQueue(() => js.PushSubscribeAsync(Plain, HasSpace, null, false));
AssertThrowsForQueue(() => js.PushSubscribeAsync(Plain, HasSpace, null, false, null));
// handler
AssertThrowsForHandler(() => js.PushSubscribeAsync(Plain, null, false));
AssertThrowsForHandler(() => js.PushSubscribeAsync(Plain, null, false, null));
AssertThrowsForHandler(() => js.PushSubscribeAsync(Plain, Plain, null, false));
AssertThrowsForHandler(() => js.PushSubscribeAsync(Plain, Plain, null, false, null));
});
}
public void TestBindDurableDeliverSubject()
{
Context.RunInJsServer(c =>
{
CreateDefaultTestStream(c);
IJetStream js = c.CreateJetStreamContext();
IJetStreamManagement jsm = c.CreateJetStreamManagementContext();
// create a durable push subscriber - has deliver subject
ConsumerConfiguration ccDurPush = ConsumerConfiguration.Builder()
.WithDurable(Durable(1))
.WithDeliverSubject(Deliver(1))
.Build();
jsm.AddOrUpdateConsumer(STREAM, ccDurPush);
// create a durable pull subscriber - notice no deliver subject
ConsumerConfiguration ccDurPull = ConsumerConfiguration.Builder()
.WithDurable(Durable(2))
.Build();
jsm.AddOrUpdateConsumer(STREAM, ccDurPull);
// try to pull subscribe against a push durable
NATSJetStreamClientException e = Assert.Throws <NATSJetStreamClientException>(
() => js.PullSubscribe(SUBJECT, PullSubscribeOptions.Builder().WithDurable(Durable(1)).Build()));
Assert.Contains(JsSubConsumerAlreadyConfiguredAsPush.Id, e.Message);
// try to pull bind against a push durable
e = Assert.Throws <NATSJetStreamClientException>(
() => js.PullSubscribe(SUBJECT, PullSubscribeOptions.BindTo(STREAM, Durable(1))));
Assert.Contains(JsSubConsumerAlreadyConfiguredAsPush.Id, e.Message);
// this one is okay
IJetStreamPullSubscription sub = js.PullSubscribe(SUBJECT, PullSubscribeOptions.Builder().WithDurable(Durable(2)).Build());
sub.Unsubscribe(); // so I can re-use the durable
// try to push subscribe against a pull durable
e = Assert.Throws <NATSJetStreamClientException>(
() => js.PushSubscribeSync(SUBJECT, PushSubscribeOptions.Builder().WithDurable(Durable(2)).Build()));
Assert.Contains(JsSubConsumerAlreadyConfiguredAsPull.Id, e.Message);
// try to push bind against a pull durable
e = Assert.Throws <NATSJetStreamClientException>(
() => js.PushSubscribeSync(SUBJECT, PushSubscribeOptions.BindTo(STREAM, Durable(2))));
Assert.Contains(JsSubConsumerAlreadyConfiguredAsPull.Id, e.Message);
// this one is okay
js.PushSubscribeSync(SUBJECT, PushSubscribeOptions.Builder().WithDurable(Durable(1)).Build());
});
}
public void TestOrderedConsumerSync()
{
Console.SetOut(new ConsoleWriter(output));
Context.RunInJsServer(c =>
{
// Setup
IJetStream js = c.CreateJetStreamContext();
string subject = Subject(111);
CreateMemoryStream(c, Stream(111), subject);
// Get this in place before any subscriptions are made
JetStream.PushMessageManagerFactoryImpl =
(conn, so, cc, queueMode, syncMode) =>
new OrderedTestDropSimulator(conn, so, cc, queueMode, syncMode);
// The options will be used in various ways
PushSubscribeOptions pso = PushSubscribeOptions.Builder().WithOrdered(true).Build();
// Test queue exception
NATSJetStreamClientException e = Assert.Throws <NATSJetStreamClientException>(() => js.PushSubscribeSync(subject, QUEUE, pso));
Assert.Contains(JsSubOrderedNotAllowOnQueues.Id, e.Message);
// Setup sync subscription
IJetStreamPushSyncSubscription sub = js.PushSubscribeSync(subject, pso);
Thread.Sleep(1000);
// Published messages will be intercepted by the OrderedTestDropSimulator
JsPublish(js, subject, 101, 6);
ulong streamSeq = 1;
while (streamSeq < 7)
{
Msg m = sub.NextMessage(1000);
if (m != null)
{
Assert.Equal(streamSeq, m.MetaData.StreamSequence);
Assert.Equal(ExpectedConSeqNums[streamSeq - 1], m.MetaData.ConsumerSequence);
++streamSeq;
}
}
sub.Unsubscribe();
EnsureNotBound(sub);
});
}
public void TestJetStreamPushDurableSubAsync()
{
Context.RunInJsServer(c =>
{
// create the stream.
CreateDefaultTestStream(c);
// Create our JetStream context.
IJetStream js = c.CreateJetStreamContext();
IJetStreamManagement jsm = c.CreateJetStreamManagementContext();
// publish some messages
JsPublish(js, SUBJECT, 5);
// Build our subscription options normally
PushSubscribeOptions optionsSync1 = PushSubscribeOptions.Builder()
.WithDurable(Durable(1))
.WithDeliverSubject(Deliver(1))
.Build();
_testPushDurableSubAsync(js, h => js.PushSubscribeAsync(SUBJECT, h, false, optionsSync1));
// bind long form
jsm.AddOrUpdateConsumer(STREAM,
ConsumerConfiguration.Builder()
.WithDurable(Durable(2))
.WithDeliverSubject(Deliver(2))
.Build());
PushSubscribeOptions options2 = PushSubscribeOptions.Builder()
.WithStream(STREAM)
.WithDurable(Durable(2))
.WithBind(true)
.Build();
_testPushDurableSubAsync(js, h => js.PushSubscribeAsync(null, h, false, options2));
// bind short form
jsm.AddOrUpdateConsumer(STREAM,
ConsumerConfiguration.Builder()
.WithDurable(Durable(3))
.WithDeliverSubject(Deliver(3))
.Build());
PushSubscribeOptions options3 = PushSubscribeOptions.BindTo(STREAM, Durable(3));
_testPushDurableSubAsync(js, h => js.PushSubscribeAsync(null, h, false, options3));
});
}
private void VisitSubject(string subject, DeliverPolicy deliverPolicy, bool headersOnly, bool ordered, Action <Msg> action)
{
PushSubscribeOptions pso = PushSubscribeOptions.Builder()
.WithOrdered(ordered)
.WithConfiguration(
ConsumerConfiguration.Builder()
.WithAckPolicy(AckPolicy.None)
.WithDeliverPolicy(deliverPolicy)
.WithHeadersOnly(headersOnly)
.Build())
.Build();
IJetStreamPushSyncSubscription sub = js.PushSubscribeSync(subject, pso);
try
{
bool lastTimedOut = false;
ulong pending = sub.GetConsumerInformation().CalculatedPending;
while (pending > 0) // no need to loop if nothing pending
{
try
{
Msg m = sub.NextMessage(js.Timeout);
action.Invoke(m);
if (--pending == 0)
{
return;
}
lastTimedOut = false;
}
catch (NATSTimeoutException)
{
if (lastTimedOut)
{
return; // two timeouts in a row is enough
}
lastTimedOut = true;
}
}
}
finally
{
sub.Unsubscribe();
}
}
public void TestBindExceptions()
{
Context.RunInJsServer(c =>
{
CreateDefaultTestStream(c);
Assert.Throws <ArgumentException>(
() => PushSubscribeOptions.Builder().WithStream(STREAM).WithBind(true).Build());
Assert.Throws <ArgumentException>(
() => PushSubscribeOptions.Builder().WithDurable(DURABLE).WithBind(true).Build());
Assert.Throws <ArgumentException>(
() => PushSubscribeOptions.Builder().WithStream(String.Empty).WithBind(true).Build());
Assert.Throws <ArgumentException>(
() => PushSubscribeOptions.Builder().WithStream(STREAM).WithDurable(String.Empty).WithBind(true).Build());
});
}
public void TestPushFieldValidation()
{
PushSubscribeOptions.PushSubscribeOptionsBuilder builder = PushSubscribeOptions.Builder();
Assert.Throws <ArgumentException>(() => builder.WithStream(HasDot).Build());
Assert.Throws <ArgumentException>(() => builder.WithDurable(HasDot).Build());
ConsumerConfiguration ccBadDur = ConsumerConfiguration.Builder().WithDurable(HasDot).Build();
Assert.Throws <ArgumentException>(() => builder.WithConfiguration(ccBadDur).Build());
// durable directly
PushSubscribeOptions.Builder().WithDurable(DURABLE).Build();
// in configuration
ConsumerConfiguration cc = ConsumerConfiguration.Builder().WithDurable(DURABLE).Build();
PushSubscribeOptions.Builder().WithConfiguration(cc).Build();
// new helper
ConsumerConfiguration.Builder().WithDurable(DURABLE).BuildPushSubscribeOptions();
}
public void TestPushAffirmative()
{
PushSubscribeOptions so = PushSubscribeOptions.Builder().Build();
// starts out all null which is fine
Assert.Null(so.Stream);
Assert.Null(so.Durable);
Assert.Null(so.DeliverSubject);
so = PushSubscribeOptions.Builder()
.WithStream(STREAM).WithDurable(DURABLE).WithDeliverSubject(DELIVER).Build();
Assert.Equal(STREAM, so.Stream);
Assert.Equal(DURABLE, so.Durable);
Assert.Equal(DELIVER, so.DeliverSubject);
// demonstrate that you can clear the builder
so = PushSubscribeOptions.Builder()
.WithStream(null).WithDeliverSubject(null).WithDurable(null).Build();
Assert.Null(so.Stream);
Assert.Null(so.Durable);
Assert.Null(so.DeliverSubject);
Assert.False(so.Pull);
}
public static void Main(string[] args)
{
ArgumentHelper helper = new ArgumentHelperBuilder("NATS JetStream Push Subscribe Bind Durable", args, Usage)
.DefaultStream("fs-stream")
.DefaultSubject("fs-subject")
.Build();
string subjectWild = helper.Subject + ".*";
string subjectA = helper.Subject + ".A";
string subjectB = helper.Subject + ".B";
try
{
using (IConnection c = new ConnectionFactory().CreateConnection(helper.MakeOptions()))
{
// Create a JetStreamManagement context.
IJetStreamManagement jsm = c.CreateJetStreamManagementContext();
// Use the utility to create a stream stored in memory.
JsUtils.CreateStreamExitWhenExists(jsm, helper.Stream, subjectWild);
// Create our JetStream context to publish and receive JetStream messages.
IJetStream js = c.CreateJetStreamContext();
JsUtils.Publish(js, subjectA, 1);
JsUtils.Publish(js, subjectB, 1);
JsUtils.Publish(js, subjectA, 1);
JsUtils.Publish(js, subjectB, 1);
// 1. create a subscription that subscribes to the wildcard subject
ConsumerConfiguration cc = ConsumerConfiguration.Builder()
.WithAckPolicy(AckPolicy.None) // don't want to worry about acking messages.
.Build();
PushSubscribeOptions pso = PushSubscribeOptions.Builder()
.WithConfiguration(cc)
.Build();
IJetStreamPushSyncSubscription sub = js.PushSubscribeSync(subjectWild, pso);
c.Flush(5000);
Msg m = sub.NextMessage(1000);
Console.WriteLine("\n1A1. Message should be from '" + subjectA + "', Sequence #1. " +
"It was: '" + m.Subject + "', Seq #" + m.MetaData.StreamSequence);
m = sub.NextMessage(1000);
Console.WriteLine("1B2. Message should be from '" + subjectB + "', Sequence #2. " +
"It was: '" + m.Subject + "', Seq #" + m.MetaData.StreamSequence);
m = sub.NextMessage(1000);
Console.WriteLine("1A3. Message should be from '" + subjectA + "', Sequence #3. " +
"It was: '" + m.Subject + "', Seq #" + m.MetaData.StreamSequence);
m = sub.NextMessage(1000);
Console.WriteLine("1B4. Message should be from '" + subjectB + "', Sequence #4. " +
"It was: '" + m.Subject + "', Seq #" + m.MetaData.StreamSequence);
// 2. create a subscription that subscribes only to the A subject
cc = ConsumerConfiguration.Builder()
.WithAckPolicy(AckPolicy.None) // don't want to worry about acking messages.
.WithFilterSubject(subjectA)
.Build();
pso = PushSubscribeOptions.Builder()
.WithConfiguration(cc)
.Build();
sub = js.PushSubscribeSync(subjectWild, pso);
c.Flush(5000);
m = sub.NextMessage(1000);
Console.WriteLine("\n2A1. Message should be from '" + subjectA + "', Sequence #1. " +
"It was: '" + m.Subject + "', Seq #" + m.MetaData.StreamSequence);
m = sub.NextMessage(1000);
Console.WriteLine("2A3. Message should be from '" + subjectA + "', Sequence #3. " +
"It was: '" + m.Subject + "', Seq #" + m.MetaData.StreamSequence);
try
{
sub.NextMessage(1000);
Console.WriteLine("2x. NOPE! Should not have gotten here");
}
catch (NATSTimeoutException) // timeout means there are no messages available
{
Console.WriteLine("2x. There was no message available.");
}
// 3. create a subscription that subscribes only to the A subject
cc = ConsumerConfiguration.Builder()
.WithAckPolicy(AckPolicy.None) // don't want to worry about acking messages.
.WithFilterSubject(subjectB)
.Build();
pso = PushSubscribeOptions.Builder()
.WithConfiguration(cc)
.Build();
sub = js.PushSubscribeSync(subjectWild, pso);
c.Flush(5000);
m = sub.NextMessage(1000);
Console.WriteLine("\n3A2. Message should be from '" + subjectB + "', Sequence #2. " +
"It was: '" + m.Subject + "', Seq #" + m.MetaData.StreamSequence);
m = sub.NextMessage(1000);
Console.WriteLine("3A4. Message should be from '" + subjectB + "', Sequence #4. " +
"It was: '" + m.Subject + "', Seq #" + m.MetaData.StreamSequence);
try
{
sub.NextMessage(1000);
Console.WriteLine("3x. NOPE! Should not have gotten here");
}
catch (NATSTimeoutException) // timeout means there are no messages available
{
Console.WriteLine("3x. There was no message available.");
}
Console.WriteLine();
// delete the stream since we are done with it.
jsm.DeleteStream(helper.Stream);
}
}
catch (Exception ex)
{
helper.ReportException(ex);
}
}
public void TestFilterSubjectEphemeral()
{
Context.RunInJsServer(c =>
{
// Create our JetStream context.
IJetStream js = c.CreateJetStreamContext();
string subjectWild = SUBJECT + ".*";
string subjectA = SUBJECT + ".A";
string subjectB = SUBJECT + ".B";
// create the stream.
CreateMemoryStream(c, STREAM, subjectWild);
JsPublish(js, subjectA, 1);
JsPublish(js, subjectB, 1);
JsPublish(js, subjectA, 1);
JsPublish(js, subjectB, 1);
// subscribe to the wildcard
ConsumerConfiguration cc = ConsumerConfiguration.Builder().WithAckPolicy(AckPolicy.None).Build();
PushSubscribeOptions pso = PushSubscribeOptions.Builder().WithConfiguration(cc).Build();
IJetStreamPushSyncSubscription sub = js.PushSubscribeSync(subjectWild, pso);
c.Flush(1000);
Msg m = sub.NextMessage(1000);
Assert.Equal(subjectA, m.Subject);
Assert.Equal(1U, m.MetaData.StreamSequence);
m = sub.NextMessage(1000);
Assert.Equal(subjectB, m.Subject);
Assert.Equal(2U, m.MetaData.StreamSequence);
m = sub.NextMessage(1000);
Assert.Equal(subjectA, m.Subject);
Assert.Equal(3U, m.MetaData.StreamSequence);
m = sub.NextMessage(1000);
Assert.Equal(subjectB, m.Subject);
Assert.Equal(4U, m.MetaData.StreamSequence);
// subscribe to A
cc = ConsumerConfiguration.Builder().WithFilterSubject(subjectA).WithAckPolicy(AckPolicy.None).Build();
pso = PushSubscribeOptions.Builder().WithConfiguration(cc).Build();
sub = js.PushSubscribeSync(subjectWild, pso);
c.Flush(1000);
m = sub.NextMessage(1000);
Assert.Equal(subjectA, m.Subject);
Assert.Equal(1U, m.MetaData.StreamSequence);
m = sub.NextMessage(1000);
Assert.Equal(subjectA, m.Subject);
Assert.Equal(3U, m.MetaData.StreamSequence);
Assert.Throws <NATSTimeoutException>(() => sub.NextMessage(1000));
// subscribe to B
cc = ConsumerConfiguration.Builder().WithFilterSubject(subjectB).WithAckPolicy(AckPolicy.None).Build();
pso = PushSubscribeOptions.Builder().WithConfiguration(cc).Build();
sub = js.PushSubscribeSync(subjectWild, pso);
c.Flush(1000);
m = sub.NextMessage(1000);
Assert.Equal(subjectB, m.Subject);
Assert.Equal(2U, m.MetaData.StreamSequence);
m = sub.NextMessage(1000);
Assert.Equal(subjectB, m.Subject);
Assert.Equal(4U, m.MetaData.StreamSequence);
Assert.Throws <NATSTimeoutException>(() => sub.NextMessage(1000));
});
}
public void TestJetStreamSubscribe()
{
Context.RunInJsServer(c =>
{
IJetStream js = c.CreateJetStreamContext();
IJetStreamManagement jsm = c.CreateJetStreamManagementContext();
CreateDefaultTestStream(jsm);
JsPublish(js);
// default ephemeral subscription.
IJetStreamPushSyncSubscription s = js.PushSubscribeSync(SUBJECT);
Msg m = s.NextMessage(DefaultTimeout);
Assert.NotNull(m);
Assert.Equal(DATA, Encoding.UTF8.GetString(m.Data));
IList <String> names = jsm.GetConsumerNames(STREAM);
Assert.Equal(1, names.Count);
// default subscribe options // ephemeral subscription.
s = js.PushSubscribeSync(SUBJECT, PushSubscribeOptions.Builder().Build());
m = s.NextMessage(DefaultTimeout);
Assert.NotNull(m);
Assert.Equal(DATA, Encoding.UTF8.GetString(m.Data));
names = jsm.GetConsumerNames(STREAM);
Assert.Equal(2, names.Count);
// set the stream
PushSubscribeOptions pso = PushSubscribeOptions.Builder()
.WithStream(STREAM).WithDurable(DURABLE).Build();
s = js.PushSubscribeSync(SUBJECT, pso);
m = s.NextMessage(DefaultTimeout);
Assert.NotNull(m);
Assert.Equal(DATA, Encoding.UTF8.GetString(m.Data));
names = jsm.GetConsumerNames(STREAM);
Assert.Equal(3, names.Count);
// coverage
js.PushSubscribeSync(SUBJECT);
js.PushSubscribeSync(SUBJECT, (PushSubscribeOptions)null);
js.PushSubscribeSync(SUBJECT, QUEUE, null);
js.PushSubscribeAsync(SUBJECT, (o, a) => {}, false);
js.PushSubscribeAsync(SUBJECT, (o, a) => {}, false, null);
js.PushSubscribeAsync(SUBJECT, QUEUE, (o, a) => {}, false, null);
// bind with w/o subject
jsm.AddOrUpdateConsumer(STREAM,
ConsumerConfiguration.Builder()
.WithDurable(Durable(101))
.WithDeliverSubject(Deliver(101))
.Build());
PushSubscribeOptions psoBind = PushSubscribeOptions.BindTo(STREAM, Durable(101));
js.PushSubscribeSync(null, psoBind).Unsubscribe();
js.PushSubscribeSync("", psoBind).Unsubscribe();
js.PushSubscribeAsync(null, (o, a) => { }, false, psoBind).Unsubscribe();
js.PushSubscribeAsync("", (o, a) => { }, false, psoBind);
jsm.AddOrUpdateConsumer(STREAM,
ConsumerConfiguration.Builder()
.WithDurable(Durable(102))
.WithDeliverSubject(Deliver(102))
.WithDeliverGroup(Queue(102))
.Build());
psoBind = PushSubscribeOptions.BindTo(STREAM, Durable(102));
js.PushSubscribeSync(null, Queue(102), psoBind).Unsubscribe();
js.PushSubscribeSync("", Queue(102), psoBind).Unsubscribe();
js.PushSubscribeAsync(null, Queue(102), (o, a) => { }, false, psoBind).Unsubscribe();
js.PushSubscribeAsync("", Queue(102), (o, a) => { }, false, psoBind);
});
}
public void TestDeliveryPolicy()
{
Context.RunInJsServer(c =>
{
IJetStreamManagement jsm = c.CreateJetStreamManagementContext();
IJetStream js = c.CreateJetStreamContext();
CreateMemoryStream(jsm, STREAM, SUBJECT_STAR);
string subjectA = SubjectDot("A");
string subjectB = SubjectDot("B");
js.Publish(subjectA, DataBytes(1));
js.Publish(subjectA, DataBytes(2));
Thread.Sleep(1500);
js.Publish(subjectA, DataBytes(3));
js.Publish(subjectB, DataBytes(91));
js.Publish(subjectB, DataBytes(92));
// DeliverPolicy.All
PushSubscribeOptions pso = PushSubscribeOptions.Builder()
.WithConfiguration(ConsumerConfiguration.Builder().WithDeliverPolicy(DeliverPolicy.All).Build())
.Build();
IJetStreamPushSyncSubscription sub = js.PushSubscribeSync(subjectA, pso);
Msg m1 = sub.NextMessage(1000);
AssertMessage(m1, 1);
Msg m2 = sub.NextMessage(1000);
AssertMessage(m2, 2);
Msg m3 = sub.NextMessage(1000);
AssertMessage(m3, 3);
// DeliverPolicy.Last
pso = PushSubscribeOptions.Builder()
.WithConfiguration(ConsumerConfiguration.Builder().WithDeliverPolicy(DeliverPolicy.Last).Build())
.Build();
sub = js.PushSubscribeSync(subjectA, pso);
Msg m = sub.NextMessage(1000);
AssertMessage(m, 3);
AssertNoMoreMessages(sub);
// DeliverPolicy.New - No new messages between subscribe and next message
pso = PushSubscribeOptions.Builder()
.WithConfiguration(ConsumerConfiguration.Builder().WithDeliverPolicy(DeliverPolicy.New).Build())
.Build();
sub = js.PushSubscribeSync(subjectA, pso);
AssertNoMoreMessages(sub);
// DeliverPolicy.New - New message between subscribe and next message
sub = js.PushSubscribeSync(subjectA, pso);
js.Publish(subjectA, DataBytes(4));
m = sub.NextMessage(1000);
AssertMessage(m, 4);
// DeliverPolicy.ByStartSequence
pso = PushSubscribeOptions.Builder()
.WithConfiguration(ConsumerConfiguration.Builder()
.WithDeliverPolicy(DeliverPolicy.ByStartSequence)
.WithStartSequence(3)
.Build())
.Build();
sub = js.PushSubscribeSync(subjectA, pso);
m = sub.NextMessage(1000);
AssertMessage(m, 3);
m = sub.NextMessage(1000);
AssertMessage(m, 4);
// DeliverPolicy.ByStartTime
pso = PushSubscribeOptions.Builder()
.WithConfiguration(ConsumerConfiguration.Builder()
.WithDeliverPolicy(DeliverPolicy.ByStartTime)
.WithStartTime(m3.MetaData.Timestamp.AddSeconds(-1))
.Build())
.Build();
sub = js.PushSubscribeSync(subjectA, pso);
m = sub.NextMessage(1000);
AssertMessage(m, 3);
m = sub.NextMessage(1000);
AssertMessage(m, 4);
// DeliverPolicy.LastPerSubject
pso = PushSubscribeOptions.Builder()
.WithConfiguration(ConsumerConfiguration.Builder()
.WithDeliverPolicy(DeliverPolicy.LastPerSubject)
.WithFilterSubject(subjectA)
.Build())
.Build();
sub = js.PushSubscribeSync(subjectA, pso);
m = sub.NextMessage(1000);
AssertMessage(m, 4);
// DeliverPolicy.ByStartSequence with a deleted record
PublishAck pa4 = js.Publish(subjectA, DataBytes(4));
PublishAck pa5 = js.Publish(subjectA, DataBytes(5));
js.Publish(subjectA, DataBytes(6));
jsm.DeleteMessage(STREAM, pa4.Seq);
jsm.DeleteMessage(STREAM, pa5.Seq);
pso = ConsumerConfiguration.Builder()
.WithDeliverPolicy(DeliverPolicy.ByStartSequence)
.WithStartSequence(pa4.Seq)
.BuildPushSubscribeOptions();
sub = js.PushSubscribeSync(subjectA, pso);
m = sub.NextMessage(1000);
AssertMessage(m, 6);
});
}
public KeyValueWatchSubscription(KeyValue kv, string keyPattern,
IKeyValueWatcher watcher, params KeyValueWatchOption[] watchOptions)
{
string subject = kv.RawKeySubject(keyPattern);
// figure out the result options
bool headersOnly = false;
bool includeDeletes = true;
DeliverPolicy deliverPolicy = DeliverPolicy.LastPerSubject;
foreach (KeyValueWatchOption wo in watchOptions)
{
switch (wo)
{
case KeyValueWatchOption.MetaOnly: headersOnly = true; break;
case KeyValueWatchOption.IgnoreDelete: includeDeletes = false; break;
case KeyValueWatchOption.UpdatesOnly: deliverPolicy = DeliverPolicy.New; break;
case KeyValueWatchOption.IncludeHistory: deliverPolicy = DeliverPolicy.All; break;
}
}
if (deliverPolicy == DeliverPolicy.New)
{
endOfDataSent = new InterlockedBoolean(true);
watcher.EndOfData();
}
else
{
KeyValueEntry kveCheckPending = kv._kvGetLastMessage(keyPattern);
if (kveCheckPending == null)
{
endOfDataSent = new InterlockedBoolean(true);
watcher.EndOfData();
}
else
{
endOfDataSent = new InterlockedBoolean(false);
}
}
PushSubscribeOptions pso = PushSubscribeOptions.Builder()
.WithStream(kv.StreamName)
.WithOrdered(true)
.WithConfiguration(
ConsumerConfiguration.Builder()
.WithAckPolicy(AckPolicy.None)
.WithDeliverPolicy(deliverPolicy)
.WithHeadersOnly(headersOnly)
.WithFilterSubject(subject)
.Build())
.Build();
EventHandler <MsgHandlerEventArgs> handler = (sender, args) =>
{
KeyValueEntry kve = new KeyValueEntry(args.msg);
if (includeDeletes || kve.Operation.Equals(KeyValueOperation.Put))
{
watcher.Watch(kve);
}
if (endOfDataSent.IsFalse() && kve.Delta == 0)
{
endOfDataSent.Set(true);
watcher.EndOfData();
}
};
sub = kv.js.PushSubscribeAsync(subject, handler, false, pso);
if (endOfDataSent.IsFalse())
{
ulong pending = sub.GetConsumerInformation().CalculatedPending;
if (pending == 0)
{
endOfDataSent.Set(true);
watcher.EndOfData();
}
}
}
public void TestAcks()
{
Context.RunInJsServer(c =>
{
// create the stream.
CreateDefaultTestStream(c);
// Create our JetStream context.
IJetStream js = c.CreateJetStreamContext();
ConsumerConfiguration cc = ConsumerConfiguration.Builder().WithAckWait(1500).Build();
// Build our subscription options.
PushSubscribeOptions options = PushSubscribeOptions.Builder()
.WithConfiguration(cc)
.Build();
IJetStreamPushSyncSubscription sub = js.PushSubscribeSync(SUBJECT, options);
c.Flush(DefaultTimeout); // flush outgoing communication with/to the server
// TERM
JsPublish(js, SUBJECT, "TERM", 1);
Msg m = sub.NextMessage(DefaultTimeout);
Assert.NotNull(m);
Assert.Equal("TERM1", Encoding.ASCII.GetString(m.Data));
m.Term();
AssertNoMoreMessages(sub);
// Ack Wait timeout
JsPublish(js, SUBJECT, "WAIT", 1);
m = sub.NextMessage(DefaultTimeout);
Assert.NotNull(m);
Assert.Equal("WAIT1", Encoding.ASCII.GetString(m.Data));
Thread.Sleep(2000);
m.Ack();
m = sub.NextMessage(DefaultTimeout);
Assert.NotNull(m);
Assert.Equal("WAIT1", Encoding.ASCII.GetString(m.Data));
// In Progress
JsPublish(js, SUBJECT, "PRO", 1);
m = sub.NextMessage(DefaultTimeout);
Assert.NotNull(m);
Assert.Equal("PRO1", Encoding.ASCII.GetString(m.Data));
m.InProgress();
Thread.Sleep(750);
m.InProgress();
Thread.Sleep(750);
m.InProgress();
Thread.Sleep(750);
m.InProgress();
Thread.Sleep(750);
m.Ack();
AssertNoMoreMessages(sub);
// ACK Sync
JsPublish(js, SUBJECT, "ACKSYNC", 1);
m = sub.NextMessage(DefaultTimeout);
Assert.NotNull(m);
Assert.Equal("ACKSYNC1", Encoding.ASCII.GetString(m.Data));
m.AckSync(DefaultTimeout);
AssertNoMoreMessages(sub);
// NAK
JsPublish(js, SUBJECT, "NAK", 1);
m = sub.NextMessage(DefaultTimeout);
Assert.NotNull(m);
Assert.Equal("NAK1", Encoding.ASCII.GetString(m.Data));
m.Nak();
m = sub.NextMessage(DefaultTimeout);
Assert.NotNull(m);
Assert.Equal("NAK1", Encoding.ASCII.GetString(m.Data));
m.Ack();
AssertNoMoreMessages(sub);
JsPublish(js, SUBJECT, "NAK", 2, 1);
m = sub.NextMessage(1000);
Assert.NotNull(m);
Assert.Equal("NAK2", Encoding.ASCII.GetString(m.Data));
m.NakWithDelay(3000);
Assert.Throws <NATSTimeoutException>(() => sub.NextMessage(500));
m = sub.NextMessage(3000);
Assert.NotNull(m);
Assert.Equal("NAK2", Encoding.ASCII.GetString(m.Data));
m.Ack();
Assert.Throws <NATSTimeoutException>(() => sub.NextMessage(500));
JsPublish(js, SUBJECT, "NAK", 3, 1);
m = sub.NextMessage(1000);
Assert.NotNull(m);
Assert.Equal("NAK3", Encoding.ASCII.GetString(m.Data));
m.NakWithDelay(Duration.OfSeconds(3)); // coverage to use both nakWithDelay
Assert.Throws <NATSTimeoutException>(() => sub.NextMessage(500));
m = sub.NextMessage(3000);
Assert.NotNull(m);
Assert.Equal("NAK3", Encoding.ASCII.GetString(m.Data));
m.Ack();
Assert.Throws <NATSTimeoutException>(() => sub.NextMessage(500));
});
}
public void TestPushAsyncFlowControl()
{
InterlockedInt fcps = new InterlockedInt();
Action <Options> optionsModifier = opts =>
{
opts.FlowControlProcessedEventHandler = (sender, args) =>
{
fcps.Increment();
};
};
Context.RunInJsServer(new TestServerInfo(TestSeedPorts.AutoPort.Increment()), optionsModifier, c =>
{
// create the stream.
CreateDefaultTestStream(c);
// Create our JetStream context.
IJetStream js = c.CreateJetStreamContext();
byte[] data = new byte[8192];
int msgCount = 1000;
for (int x = 100_000; x < msgCount + 100_000; x++)
{
byte[] fill = Encoding.ASCII.GetBytes("" + x);
Array.Copy(fill, 0, data, 0, 6);
js.Publish(new Msg(SUBJECT, data));
}
InterlockedInt count = new InterlockedInt();
HashSet <string> set = new HashSet <string>();
CountdownEvent latch = new CountdownEvent(msgCount);
// create our message handler, does not ack
void Handler(object sender, MsgHandlerEventArgs args)
{
byte[] fill = new byte[6];
Array.Copy(args.Message.Data, 0, fill, 0, 6);
string id = Encoding.ASCII.GetString(fill);
if (set.Add(id))
{
count.Increment();
}
args.Message.Ack();
latch.Signal();
}
// subscribe using the handler
ConsumerConfiguration cc = ConsumerConfiguration.Builder().WithFlowControl(1000).Build();
PushSubscribeOptions pso = PushSubscribeOptions.Builder().WithConfiguration(cc).Build();
js.PushSubscribeAsync(SUBJECT, Handler, false, pso);
// wait for messages to arrive using the countdown latch.
latch.Wait();
Assert.Equal(msgCount, count.Read());
Assert.True(fcps.Read() > 0);
});
}
public void TestHandlerAutoAck()
{
Context.RunInJsServer(c =>
{
// create the stream.
CreateDefaultTestStream(c);
// Create our JetStream context.
IJetStream js = c.CreateJetStreamContext();
// publish some messages
JsPublish(js, SUBJECT, 10);
// 1. auto ack true
CountdownEvent latch1 = new CountdownEvent(10);
int handlerReceived1 = 0;
// create our message handler, does not ack
void Handler1(object sender, MsgHandlerEventArgs args)
{
handlerReceived1++;
latch1.Signal();
}
// subscribe using the handler, auto ack true
PushSubscribeOptions pso1 = PushSubscribeOptions.Builder()
.WithDurable(Durable(1)).Build();
IJetStreamPushAsyncSubscription asub = js.PushSubscribeAsync(SUBJECT, Handler1, true, pso1);
// wait for messages to arrive using the countdown latch.
latch1.Wait();
Assert.Equal(10, handlerReceived1);
asub.Unsubscribe();
// check that all the messages were read by the durable
IJetStreamPushSyncSubscription ssub = js.PushSubscribeSync(SUBJECT, pso1);
AssertNoMoreMessages(ssub);
// 2. auto ack false
CountdownEvent latch2 = new CountdownEvent(10);
int handlerReceived2 = 0;
// create our message handler, also does not ack
void Handler2(object sender, MsgHandlerEventArgs args)
{
handlerReceived2++;
latch2.Signal();
}
// subscribe using the handler, auto ack false
ConsumerConfiguration cc = ConsumerConfiguration.Builder().WithAckWait(500).Build();
PushSubscribeOptions pso2 = PushSubscribeOptions.Builder()
.WithDurable(Durable(2)).WithConfiguration(cc).Build();
asub = js.PushSubscribeAsync(SUBJECT, Handler2, false, pso2);
// wait for messages to arrive using the countdown latch.
latch2.Wait();
Assert.Equal(10, handlerReceived2);
Thread.Sleep(2000); // just give it time for the server to realize the messages are not ack'ed
asub.Unsubscribe();
// check that we get all the messages again
ssub = js.PushSubscribeSync(SUBJECT, pso2);
Assert.Equal(10, ReadMessagesAck(ssub).Count);
});
}
private void ChangeOkPush(IJetStream js, ConsumerConfiguration.ConsumerConfigurationBuilder builder)
{
js.PushSubscribeSync(SUBJECT, PushSubscribeOptions.Builder().WithConfiguration(builder.Build()).Build()).Unsubscribe();
}
public static void Main(string[] args)
{
ArgumentHelper helper = new ArgumentHelperBuilder("Push Subscribe Basic Sync", args, Usage)
.DefaultStream("example-stream")
.DefaultSubject("example-subject")
.DefaultCount(0, true) // true indicated 0 means unlimited
// .DefaultDurable("push-sub-basic-sync-durable")
.Build();
int count = helper.Count < 1 ? int.MaxValue : helper.Count;
try
{
using (IConnection c = new ConnectionFactory().CreateConnection(helper.MakeOptions()))
{
// The stream (and data) must exist
JsUtils.ExitIfStreamNotExists(c, helper.Stream);
// Create our JetStream context.
IJetStream js = c.CreateJetStreamContext();
// Build our subscription options.
// * A push subscription means the server will "push" us messages.
// * Durable means the server will remember where we are if we use that name.
// * Durable can by null or empty, the builder treats them the same.
// * The stream name is not technically required. If it is not provided, the
// code building the subscription will look it up by making a request to the server.
// If you know the stream name, you might as well supply it and save a trip to the server.
PushSubscribeOptions so = PushSubscribeOptions.Builder()
.WithStream(helper.Stream)
.WithDurable(helper.Durable) // it's okay if this is null, the builder handles it
.Build();
// Subscribe synchronously, then just wait for messages.
IJetStreamPushSyncSubscription sub = js.PushSubscribeSync(helper.Subject, so);
c.Flush(5000);
int red = 0;
while (count > 0)
{
try
{
Msg msg = sub.NextMessage(1000);
Console.WriteLine("\nMessage Received:");
if (msg.HasHeaders)
{
Console.WriteLine(" Headers:");
foreach (string key in msg.Header.Keys)
{
foreach (string value in msg.Header.GetValues(key))
{
Console.WriteLine($" {key}: {value}");
}
}
}
Console.WriteLine(" Subject: {0}\n Data: {1}\n", msg.Subject, Encoding.UTF8.GetString(msg.Data));
Console.WriteLine(" " + msg.MetaData);
// Because this is a synchronous subscriber, there's no auto-ack.
// The default Consumer Configuration AckPolicy is Explicit
// so we need to ack the message or it'll be redelivered.
msg.Ack();
++red;
--count;
}
catch (NATSTimeoutException) // timeout means there are no messages available
{
count = 0; // ran out of messages
}
}
Console.WriteLine("\n" + red + " message(s) were received.\n");
sub.Unsubscribe();
c.Flush(5000);
}
}
catch (Exception ex)
{
helper.ReportException(ex);
}
}
public void TestMoreCreateSubscriptionErrors()
{
Context.RunInJsServer(c =>
{
// Create our JetStream context.
IJetStream js = c.CreateJetStreamContext();
NATSJetStreamClientException e = Assert.Throws <NATSJetStreamClientException>(() => js.PushSubscribeSync(SUBJECT));
Assert.Contains(JsSubNoMatchingStreamForSubject.Id, e.Message);
// create the stream.
CreateDefaultTestStream(c);
// general pull push validation
ConsumerConfiguration ccPush = ConsumerConfiguration.Builder().WithDurable("pulldur").WithDeliverGroup("cantHave").Build();
PullSubscribeOptions pullCantHaveDlvrGrp = PullSubscribeOptions.Builder().WithConfiguration(ccPush).Build();
e = Assert.Throws <NATSJetStreamClientException>(() => js.PullSubscribe(SUBJECT, pullCantHaveDlvrGrp));
Assert.Contains(JsSubPullCantHaveDeliverGroup.Id, e.Message);
ccPush = ConsumerConfiguration.Builder().WithDurable("pulldur").WithDeliverSubject("cantHave").Build();
PullSubscribeOptions pullCantHaveDlvrSub = PullSubscribeOptions.Builder().WithConfiguration(ccPush).Build();
e = Assert.Throws <NATSJetStreamClientException>(() => js.PullSubscribe(SUBJECT, pullCantHaveDlvrSub));
Assert.Contains(JsSubPullCantHaveDeliverSubject.Id, e.Message);
ccPush = ConsumerConfiguration.Builder().WithMaxPullWaiting(1).Build();
PushSubscribeOptions pushSo = PushSubscribeOptions.Builder().WithConfiguration(ccPush).Build();
e = Assert.Throws <NATSJetStreamClientException>(() => js.PushSubscribeSync(SUBJECT, pushSo));
Assert.Contains(JsSubPushCantHaveMaxPullWaiting.Id, e.Message);
ccPush = ConsumerConfiguration.Builder().WithMaxPullWaiting(-1).Build();
pushSo = PushSubscribeOptions.Builder().WithConfiguration(ccPush).Build();
js.PushSubscribeSync(SUBJECT, pushSo);
ccPush = ConsumerConfiguration.Builder().WithMaxBatch(1).Build();
pushSo = PushSubscribeOptions.Builder().WithConfiguration(ccPush).Build();
e = Assert.Throws <NATSJetStreamClientException>(() => js.PushSubscribeSync(SUBJECT, pushSo));
ccPush = ConsumerConfiguration.Builder().WithMaxBatch(-1).Build();
pushSo = PushSubscribeOptions.Builder().WithConfiguration(ccPush).Build();
js.PushSubscribeSync(SUBJECT, pushSo);
Assert.Contains(JsSubPushCantHaveMaxBatch.Id, e.Message);
ccPush = ConsumerConfiguration.Builder().WithMaxBytes(1).Build();
pushSo = PushSubscribeOptions.Builder().WithConfiguration(ccPush).Build();
e = Assert.Throws <NATSJetStreamClientException>(() => js.PushSubscribeSync(SUBJECT, pushSo));
ccPush = ConsumerConfiguration.Builder().WithMaxBytes(-1).Build();
pushSo = PushSubscribeOptions.Builder().WithConfiguration(ccPush).Build();
js.PushSubscribeSync(SUBJECT, pushSo);
Assert.Contains(JsSubPushCantHaveMaxBytes.Id, e.Message);
// create some consumers
PushSubscribeOptions psoDurNoQ = PushSubscribeOptions.Builder().WithDurable("durNoQ").Build();
js.PushSubscribeSync(SUBJECT, psoDurNoQ);
PushSubscribeOptions psoDurYesQ = PushSubscribeOptions.Builder().WithDurable("durYesQ").Build();
js.PushSubscribeSync(SUBJECT, "yesQ", psoDurYesQ);
// already bound
e = Assert.Throws <NATSJetStreamClientException>(() => js.PushSubscribeSync(SUBJECT, psoDurNoQ));
Assert.Contains(JsSubConsumerAlreadyBound.Id, e.Message);
// queue match
PushSubscribeOptions qmatch = PushSubscribeOptions.Builder()
.WithDurable("qmatchdur").WithDeliverGroup("qmatchq").Build();
e = Assert.Throws <NATSJetStreamClientException>(() => js.PushSubscribeSync(SUBJECT, "qnotmatch", qmatch));
Assert.Contains(JsSubQueueDeliverGroupMismatch.Id, e.Message);
// queue vs config
e = Assert.Throws <NATSJetStreamClientException>(() => js.PushSubscribeSync(SUBJECT, "notConfigured", psoDurNoQ));
Assert.Contains(JsSubExistingConsumerNotQueue.Id, e.Message);
PushSubscribeOptions psoNoVsYes = PushSubscribeOptions.Builder().WithDurable("durYesQ").Build();
e = Assert.Throws <NATSJetStreamClientException>(() => js.PushSubscribeSync(SUBJECT, psoNoVsYes));
Assert.Contains(JsSubExistingConsumerIsQueue.Id, e.Message);
PushSubscribeOptions psoYesVsNo = PushSubscribeOptions.Builder().WithDurable("durYesQ").Build();
e = Assert.Throws <NATSJetStreamClientException>(() => js.PushSubscribeSync(SUBJECT, "qnotmatch", psoYesVsNo));
Assert.Contains(JsSubExistingQueueDoesNotMatchRequestedQueue.Id, e.Message);
// flow control heartbeat push / pull
ConsumerConfiguration ccFc = ConsumerConfiguration.Builder().WithDurable("ccFcDur").WithFlowControl(1000).Build();
ConsumerConfiguration ccHb = ConsumerConfiguration.Builder().WithDurable("ccHbDur").WithIdleHeartbeat(1000).Build();
PullSubscribeOptions psoPullCcFc = PullSubscribeOptions.Builder().WithConfiguration(ccFc).Build();
e = Assert.Throws <NATSJetStreamClientException>(() => js.PullSubscribe(SUBJECT, psoPullCcFc));
Assert.Contains(JsSubFcHbNotValidPull.Id, e.Message);
PullSubscribeOptions psoPullCcHb = PullSubscribeOptions.Builder().WithConfiguration(ccHb).Build();
e = Assert.Throws <NATSJetStreamClientException>(() => js.PullSubscribe(SUBJECT, psoPullCcHb));
Assert.Contains(JsSubFcHbNotValidPull.Id, e.Message);
PushSubscribeOptions psoPushCcFc = PushSubscribeOptions.Builder().WithConfiguration(ccFc).Build();
e = Assert.Throws <NATSJetStreamClientException>(() => js.PushSubscribeSync(SUBJECT, "cantHaveQ", psoPushCcFc));
Assert.Contains(JsSubFcHbHbNotValidQueue.Id, e.Message);
PushSubscribeOptions psoPushCcHb = PushSubscribeOptions.Builder().WithConfiguration(ccHb).Build();
e = Assert.Throws <NATSJetStreamClientException>(() => js.PushSubscribeSync(SUBJECT, "cantHaveQ", psoPushCcHb));
Assert.Contains(JsSubFcHbHbNotValidQueue.Id, e.Message);
});
}
public static void Main(string[] args)
{
ArgumentHelper helper = new ArgumentHelperBuilder("NATS JetStream Push Subscribe Bind Durable", args, Usage)
.DefaultStream("fs-stream")
.DefaultSubject("fs-subject")
.Build();
string subjectNoAck = helper.Subject + "noack";
string subjectAck = helper.Subject + "ack";
string deliverNoAck = helper.DeliverSubject + "noack";
string deliverAck = helper.DeliverSubject + "ack";
try
{
using (IConnection c = new ConnectionFactory().CreateConnection(helper.MakeOptions()))
{
// Create a JetStreamManagement context.
IJetStreamManagement jsm = c.CreateJetStreamManagementContext();
// Use the utility to create a stream stored in memory.
JsUtils.CreateStreamExitWhenExists(jsm, helper.Stream, subjectNoAck, subjectAck);
// Create our JetStream context.
IJetStream js = c.CreateJetStreamContext();
// The server uses the delivery subject as both an inbox for a JetStream subscription
// and as a core nats messages subject.
// BUT BE CAREFUL. THIS IS STILL A JETSTREAM SUBJECT AND ALL MESSAGES
// ADHERE TO THE ACK POLICY
// NoAck 1. Set up the noAck consumer / deliver subject configuration
ConsumerConfiguration cc = ConsumerConfiguration.Builder()
.WithAckPolicy(AckPolicy.None)
.WithAckWait(1000)
.Build();
PushSubscribeOptions pso = PushSubscribeOptions.Builder()
.WithDeliverSubject(deliverNoAck)
.WithConfiguration(cc)
.Build();
// NoAck 2. Set up the JetStream and core subscriptions
// Notice the JetStream subscribes to the real subject
// and the core subscribes to the delivery subject
// Order matters, you must do the JetStream subscribe first
// But you also must make sure the core sub is made
// before messages are published
IJetStreamPushSyncSubscription jsSub = js.PushSubscribeSync(subjectNoAck, pso);
c.Flush(5000);
ISyncSubscription coreSub = c.SubscribeSync(deliverNoAck);
// NoAck 3. JsUtils.Publish to the real subject
JsUtils.Publish(js, subjectNoAck, "A", 1);
// NoAck 4. Read the message with the js no ack subscription. No need to ack
Msg msg = jsSub.NextMessage(1000);
PrintMessage("\nNoAck 4. Read w/JetStream sub", msg);
// NoAck 5. Read the message with the core subscription on the
// no ack deliver subject. Since this message is a JetStream
// message we could ack. But we don't have to since the consumer
// was setup as AckPolicy None
msg = coreSub.NextMessage(1000);
PrintMessage("NoAck 5. Read w/core sub", msg);
// NoAck 6. Thread.Sleep longer than the ack wait period to check and make sure the
// message is not replayed
Thread.Sleep(1100);
try
{
coreSub.NextMessage(1000);
Console.WriteLine("NoAck 6. NOPE! Should not have gotten here");
}
catch (NATSTimeoutException) // timeout means there are no messages available
{
Console.WriteLine("NoAck 6. Read w/core sub.\nAck Policy is none so no replay even though message was not Ack'd.\nThere was no message available.");
}
// Ack 1. Set up the Ack consumer / deliver subject configuration
cc = ConsumerConfiguration.Builder()
.WithAckPolicy(AckPolicy.Explicit)
.WithAckWait(1000)
.Build();
pso = PushSubscribeOptions.Builder()
.WithDeliverSubject(deliverAck)
.WithConfiguration(cc)
.Build();
// Ack 2. Set up the JetStream and core subscriptions
jsSub = js.PushSubscribeSync(subjectAck, pso);
c.Flush(5000);
coreSub = c.SubscribeSync(deliverAck);
// Ack 3. JsUtils.Publish to the real subject
JsUtils.Publish(js, subjectAck, "B", 1);
// Ack 4. Read the message with the js no ack subscription. No need to ack
msg = jsSub.NextMessage(1000);
PrintMessage("\nAck 4. Read w/JetStream sub", msg);
// Ack 5. Read the message with the core subscription on the
// ack deliver subject.
// Even though it is read on a core subscription
// it still is a JetStream message. Don't ack this time
msg = coreSub.NextMessage(1000);
PrintMessage("Ack 5. Read w/core sub", msg);
// Ack 6. Thread.Sleep longer than the ack wait period to check and
// see that the message is re-delivered. Ack this time.
Thread.Sleep(1100);
msg = coreSub.NextMessage(1000);
msg.Ack();
PrintMessage("Ack 6. Read w/core sub.\nWasn't Ack'd after step 'Ack 5.' so message was replayed.", msg);
// Ack 7. Thread.Sleep longer than the ack wait period. The message
// is not re-delivered this time
Thread.Sleep(1100);
try
{
coreSub.NextMessage(1000);
Console.WriteLine("Ack 7. NOPE! Should not have gotten here");
}
catch (NATSTimeoutException) // timeout means there are no messages available
{
Console.WriteLine("Ack 7. Read w/core sub.\nMessage received by core sub in step 'Ack 6.' was JetStream so it was Ack'd and therefore not replayed.\nThere was no message available.", msg);
}
// delete the stream since we are done with it.
jsm.DeleteStream(helper.Stream);
}
}
catch (Exception ex)
{
helper.ReportException(ex);
}
}