public static void Main(string[] args)
{
ArgumentHelper helper = new ArgumentHelperBuilder("Pull Subscription using primitive Expires In", args, Usage)
.DefaultStream("fetch-stream")
.DefaultSubject("fetch-subject")
.DefaultDurable("fetch-durable")
.DefaultCount(15)
.Build();
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, helper.Subject);
// Create our JetStream context.
IJetStream js = c.CreateJetStreamContext();
// Start publishing the messages, don't wait for them to finish, simulating an outside producer.
JsUtils.PublishInBackground(js, helper.Subject, "fetch-message", helper.Count);
// Build our consumer configuration and subscription options.
// make sure the ack wait is sufficient to handle the reading and processing of the batch.
// Durable is REQUIRED for pull based subscriptions
ConsumerConfiguration cc = ConsumerConfiguration.Builder()
.WithAckWait(2500)
.Build();
PullSubscribeOptions pullOptions = PullSubscribeOptions.Builder()
.WithDurable(helper.Durable) // required
.WithConfiguration(cc)
.Build();
// subscribe
IJetStreamPullSubscription sub = js.PullSubscribe(helper.Subject, pullOptions);
c.Flush(1000);
int red = 0;
while (red < helper.Count)
{
IList <Msg> list = sub.Fetch(10, 1000);
foreach (Msg m in list)
{
Console.WriteLine($"{++red}. Message: {m}");
m.Ack();
}
}
// delete the stream since we are done with it.
jsm.DeleteStream(helper.Stream);
}
}
catch (Exception ex)
{
helper.ReportException(ex);
}
}
public static void Main(string[] args)
{
ArgumentHelper helper = new ArgumentHelperBuilder("Pull Subscription using primitive Expires In", args, Usage)
.DefaultStream("expires-in-stream")
.DefaultSubject("expires-in-subject")
.DefaultDurable("expires-in-durable")
.DefaultCount(15)
.Build();
try
{
using (IConnection c = new ConnectionFactory().CreateConnection(helper.MakeOptions()))
{
// Create a JetStreamManagement context.
IJetStreamManagement jsm = c.CreateJetStreamManagementContext();
// Use the utility to create a stream stored in memory.
JsUtils.CreateStreamExitWhenExists(jsm, helper.Stream, helper.Subject);
// Create our JetStream context.
IJetStream js = c.CreateJetStreamContext();
// Start publishing the messages, don't wait for them to finish, simulating an outside producer.
JsUtils.PublishInBackground(js, helper.Subject, "expires-in-message", helper.Count);
// Build our subscription options. Durable is REQUIRED for pull based subscriptions
PullSubscribeOptions pullOptions = PullSubscribeOptions.Builder()
.WithDurable(helper.Durable) // required
.Build();
// subscribe
IJetStreamPullSubscription sub = js.PullSubscribe(helper.Subject, pullOptions);
c.Flush(1000);
bool keepGoing = true;
int red = 0;
while (keepGoing && red < helper.Count)
{
sub.PullExpiresIn(10, 1000);
int round = 0;
while (keepGoing && round < 10)
{
try
{
Msg m = sub.NextMessage(1000); // first message
Console.WriteLine($"{++red}. Message: {m}");
m.Ack();
round++;
}
catch (NATSTimeoutException) // timeout means there are no messages available
{
keepGoing = false;
}
}
}
// delete the stream since we are done with it.
jsm.DeleteStream(helper.Stream);
}
}
catch (Exception ex)
{
helper.ReportException(ex);
}
}