private static void Transaction(PulsarClient pulsarClient)
{
var txn = (Transaction)pulsarClient.NewTransaction().WithTransactionTimeout(TimeSpan.FromMinutes(5)).Build();
var producer = pulsarClient.NewProducer(new ProducerConfigBuilder <byte[]>()
.SendTimeout(0)
.Topic(myTopic));
var consumer = pulsarClient.NewConsumer(new ConsumerConfigBuilder <byte[]>()
.Topic(myTopic)
.ForceTopicCreation(true)
.SubscriptionName("myTopic-sub"));
for (var i = 0; i < 10; i++)
{
var text = $"tuts-{i}";
var data = Encoding.UTF8.GetBytes(text);
producer.NewMessage(txn).Value(data).Send();
Console.WriteLine($"produced: {text}");
}
var pool = ArrayPool <byte> .Shared;
//Should not consume messages as the transaction is not committed yet
for (var i = 0; i < 10; ++i)
{
var message = (Message <byte[]>)consumer.Receive();
if (message != null)
{
var payload = pool.Rent((int)message.Data.Length);
Array.Copy(sourceArray: message.Data.ToArray(), destinationArray: payload, length: (int)message.Data.Length);
consumer.Acknowledge(message);
var res = Encoding.UTF8.GetString(message.Data);
Console.WriteLine($"[1] message '{res}' from topic: {message.TopicName}");
}
}
txn.Commit();
for (var i = 0; i < 10; i++)
{
var message = (Message <byte[]>)consumer.Receive();
if (message != null)
{
var payload = pool.Rent((int)message.Data.Length);
Array.Copy(sourceArray: message.Data.ToArray(), destinationArray: payload, length: (int)message.Data.Length);
consumer.Acknowledge(message);
var res = Encoding.UTF8.GetString(message.Data);
Console.WriteLine($"[2] message '{res}' from topic: {message.TopicName}");
}
}
}
