Masstransit How to disconnect from from RabbitMq - masstransit

Question

I am using Masstransit with RabbitMQ. As part of some deployment procedure, At some point in time I need my service to disconnect and stop receiving any messages.
Assuming that I won't need the bus until the next restart of the service, will it be Ok to use bus.StopAsync()?
Is there a way to get list of end points and then remove them from listining ?

Answer 1

You should StopAsync the bus, and then when ready, call StartAsync to bring it back up (or start it at the next service restart).

Answer 2

To stop receiving messages without stopping the buss I needed a solution that will avoid the consume message pipeline from consuming any type of message. I tried with observers but unsuccessfully. My solution came up with custom consuming message filter.
The filter part looks like this
public class ComsumersBlockingFilter<T> :
IFilter<ConsumeContext<T>>
where T : class
{
public void Probe(ProbeContext context)
{
var scope = context.CreateFilterScope("messageFilter");
}
public async Task Send(ConsumeContext<T> context, IPipe<ConsumeContext<T>> next)
{
// Check if the service is degraded (true for this demo)
var isServiceDegraded = true;
if (isServiceDegraded)
{
//Suspend the message for 5 seconds
await Task.Delay(TimeSpan.FromMilliseconds(5000), context.CancellationToken);
if (!context.CancellationToken.IsCancellationRequested)
{
//republish the message
await context.Publish(context.Message);
Console.WriteLine($"Message {context.MessageId} has been republished");
}
// NotifyConsumed to avoid skipped message
await context.NotifyConsumed(TimeSpan.Zero, "messageFilter");
}
else
{
//Next filter in the pipe is called
await next.Send(context);
}
}
}
The main idea is to delay with cancellation token and the republish the message. After that call contect.NotifyConsumed to avoid the next pipeline filters and return normally.