public static void Main(string[] args)
{
ArgumentHelper helper = new ArgumentHelperBuilder("JetStream Manage Streams", args, Usage)
.DefaultStream("manage-stream-")
.DefaultSubject("manage-subject-")
.Build();
string stream1 = helper.Stream + "1";
string stream2 = helper.Stream + "2";
string subject1 = helper.Subject + "1";
string subject2 = helper.Subject + "2";
string subject3 = helper.Subject + "3";
string subject4 = helper.Subject + "4";
try
{
using (IConnection c = new ConnectionFactory().CreateConnection(helper.MakeOptions()))
{
// Create a JetStreamManagement context.
IJetStreamManagement jsm = c.CreateJetStreamManagementContext();
// we want to be able to completely create and delete the streams
// so don't want to work with existing streams
JsUtils.ExitIfStreamExists(jsm, stream1);
JsUtils.ExitIfStreamExists(jsm, stream2);
// 1. Create (add) a stream with a subject
Console.WriteLine("\n----------\n1. Configure And Add Stream 1");
StreamConfiguration streamConfig = StreamConfiguration.Builder()
.WithName(stream1)
.WithSubjects(subject1)
// .WithRetentionPolicy(...)
// .WithMaxConsumers(...)
// .WithMaxBytes(...)
// .WithMaxAge(...)
// .WithMaxMsgSize(...)
.WithStorageType(StorageType.Memory)
// .WithReplicas(...)
// .WithNoAck(...)
// .WithTemplateOwner(...)
// .WithDiscardPolicy(...)
.Build();
StreamInfo streamInfo = jsm.AddStream(streamConfig);
PrintUtils.PrintStreamInfo(streamInfo);
// 2. Update stream, in this case add a subject
// Thre are very few properties that can actually
// - StreamConfiguration is immutable once created
// - but the builder can help with that.
Console.WriteLine("----------\n2. Update Stream 1");
streamConfig = StreamConfiguration.Builder(streamInfo.Config)
.AddSubjects(subject2).Build();
streamInfo = jsm.UpdateStream(streamConfig);
PrintUtils.PrintStreamInfo(streamInfo);
// 3. Create (add) another stream with 2 subjects
Console.WriteLine("----------\n3. Configure And Add Stream 2");
streamConfig = StreamConfiguration.Builder()
.WithName(stream2)
.WithSubjects(subject3, subject4)
.WithStorageType(StorageType.Memory)
.Build();
streamInfo = jsm.AddStream(streamConfig);
PrintUtils.PrintStreamInfo(streamInfo);
// 4. Get information on streams
// 4.0 publish some message for more interesting stream state information
// - SUBJECT1 is associated with STREAM1
// 4.1 getStreamInfo on a specific stream
// 4.2 get a list of all streams
// 4.3 get a list of StreamInfo's for all streams
Console.WriteLine("----------\n4.1 getStreamInfo");
JsUtils.Publish(c, subject1, 5);
streamInfo = jsm.GetStreamInfo(stream1);
PrintUtils.PrintStreamInfo(streamInfo);
Console.WriteLine("----------\n4.2 getStreamNames");
IList <String> streamNames = jsm.GetStreamNames();
PrintUtils.PrintObject(streamNames);
Console.WriteLine("----------\n4.3 getStreams");
IList <StreamInfo> streamInfos = jsm.GetStreams();
PrintUtils.PrintStreamInfoList(streamInfos);
// 5. Purge a stream of it's messages
Console.WriteLine("----------\n5. Purge stream");
PurgeResponse purgeResponse = jsm.PurgeStream(stream1);
PrintUtils.PrintObject(purgeResponse);
// 6. Delete the streams
// Subsequent calls to getStreamInfo, deleteStream or purgeStream
// will throw a JetStreamApiException "stream not found [10059]"
Console.WriteLine("----------\n6. Delete streams");
jsm.DeleteStream(stream1);
jsm.DeleteStream(stream2);
// 7. Try to delete the consumer again and get the exception
Console.WriteLine("----------\n7. Delete stream again");
try
{
jsm.DeleteStream(stream1);
}
catch (NATSJetStreamException e)
{
Console.WriteLine($"Exception was: '{e.ErrorDescription}'");
}
Console.WriteLine("----------\n");
}
}
catch (Exception ex)
{
helper.ReportException(ex);
}
}