Why is JobConsumer not being hit/run? - rabbitmq

Question

I am trying out the new MassTransit IJobConsumer implementation, and although I've tried to follow the documentation, the JobConsumer I have written is never being run/hit.
I have:
created the JobConsumer which has a run method that runs the code I need it to
public class CalculationStartRunJobConsumer : IJobConsumer<ICalculationStartRun>
{
private readonly ICalculationRunQueue runQueue;
public CalculationStartRunJobConsumer(ICalculationRunQueue runQueue)
{
this.runQueue = runQueue;
}
public Task Run(JobContext<ICalculationStartRun> context)
{
return Task.Run(
() =>
{
var longRunningJob = new LongRunningJob<ICalculationStartRun>
{
Job = context.Job,
CancellationToken = context.CancellationToken,
JobId = context.JobId,
};
runQueue.StartSpecial(longRunningJob);
},
context.CancellationToken);
}
}
I have registered that consumer trying both ConnectReceiveEndpoint and AddConsumer
Configured the ServiceInstance as shown in the documentation
services.AddMassTransit(busRegistrationConfigurator =>
{
// TODO: Get rid of this ugly if statement.
if (consumerTypes != null)
{
foreach (var consumerType in consumerTypes)
{
busRegistrationConfigurator.AddConsumer(consumerType);
}
}
if(requestClientType != null)
{
busRegistrationConfigurator.AddRequestClient(requestClientType);
}
busRegistrationConfigurator.UsingRabbitMq((context, cfg) =>
{
cfg.UseNewtonsoftJsonSerializer();
cfg.UseNewtonsoftJsonDeserializer();
cfg.ConfigureNewtonsoftJsonSerializer(settings =>
{
// The serializer by default omits fields that are set to their default value, but this causes unintended effects
settings.NullValueHandling = NullValueHandling.Include;
settings.DefaultValueHandling = DefaultValueHandling.Include;
return settings;
});
cfg.Host(
messagingHostInfo.HostAddress,
hostConfigurator =>
{
hostConfigurator.Username(messagingHostInfo.UserName);
hostConfigurator.Password(messagingHostInfo.Password);
});
cfg.ServiceInstance(instance =>
{
instance.ConfigureJobServiceEndpoints(serviceCfg =>
{
serviceCfg.FinalizeCompleted = true;
});
instance.ConfigureEndpoints(context);
});
});
});
Seen that the queue for the job does appear in the queue for RabbitMQ
When I call .Send to send a message to that queue, it does not activate the Run method on the JobConsumer.
public async Task Send<T>(string queueName, T message) where T : class
{
var endpointUri = GetEndpointUri(messagingHostInfo.HostAddress, queueName);
var sendEndpoint = await bus.GetSendEndpoint(endpointUri);
await sendEndpoint.Send(message);
}
Can anyone help?
Software
MassTransit 8.0.2
MassTransit.RabbitMq 8.0.2
MassTransit.NewtonsoftJson 8.0.2
.NET6
Using in-memory for JobConsumer

Answer 1

The setup of any type of repository for long running jobs is missing. We needed to either:
explicitly specify that it was using InMemory (missing from the docs)
Setup saga repositories using e.g. EF Core.
As recommended by MassTransit, we went with the option of setting up saga repositories by implementing databases and interacting with them using EF Core.