public void ConsumeOneByOne()
{
var factory = new ConnectionFactory()
{
HostName = "localhost"
};
using var connection = factory.CreateConnection();
using var channel = connection.CreateModel();
channel.QueueDeclare(queue: "hello",
durable: false,
exclusive: false,
autoDelete: false,
arguments: null);
var consumer = new EventingBasicConsumer(channel);
var finalDatabaseRepository = new ReactiveBatchRepository(new SQLiteDatabase(nameof(ConsumeOneByOne)));
consumer.Received += (model, ea) =>
{
var body = ea.Body;
var message = Encoding.UTF8.GetString(body.ToArray());
finalDatabaseRepository.InsertData(int.Parse(message)).Wait();
channel.BasicAck(ea.DeliveryTag, false);
};
channel.BasicConsume(queue: "hello",
autoAck: false,
consumer: consumer);
Thread.Sleep(TimeSpan.FromSeconds(10));
}
public void ConsumePreFetchWithFinalRepository()
{
var factory = new ConnectionFactory()
{
HostName = "localhost"
};
using var connection = factory.CreateConnection();
using var channel = connection.CreateModel();
channel.QueueDeclare(queue: "hello",
durable: false,
exclusive: false,
autoDelete: false,
arguments: null);
channel.BasicQos(0, 10000, false);
var consumer = new EventingBasicConsumer(channel);
var receiver = Observable.FromEventPattern <EventHandler <BasicDeliverEventArgs>, BasicDeliverEventArgs>(
h => consumer.Received += h,
h => consumer.Received -= h);
var finalDatabaseRepository =
new ReactiveBatchRepository(new SQLiteDatabase(nameof(ConsumePreFetchWithFinalRepository)));
using var eventHandlingFlow = receiver
.Select(@event => Observable.FromAsync(async() =>
{
var item = int.Parse(Encoding.UTF8.GetString(@event.EventArgs.Body.ToArray()));
await finalDatabaseRepository.InsertData(item).ConfigureAwait(false);
channel.BasicAck(@event.EventArgs.DeliveryTag, false);
}))
.Merge()
.Subscribe();
channel.BasicConsume(queue: "hello",
autoAck: false,
consumer: consumer);
Thread.Sleep(TimeSpan.FromSeconds(10));
}