Follow-up question - I saw some activity around the load balancer in
SVN after my last message and dug into it and discovered the
LoadBalancerHost and it's accompanying
RemoteAppDomainLoadBalancerHost. I'm not using this for my load
balancer, yet it's still working - so I'm wondering what it is exactly
that I've got going here... My workers are configured with load
balancer endpoints but I'm not sure how the messages are getting sent
to the worker queues without the MsmqLoadBalancer in play. I've been
going through the RSB code but I'm not exactly sure of the flow at
this point.
In any event - when I do try to use the LoadBalancerHost or the remote
app domain loader it complains about the endpoint and threadCount
properties that it's dependent on. I saw in the unit tests how you're
manually specifying these values when configuring the container, but I
don't have hook to do this with the LoadBalancerHost as it doesn't use
a bootstrapper to configure the host before starting it, even if you
specify one. I have the facility configuration in my config file,
obviously, but it's not picking it up for some reason:
public void Start()
{
var container = new WindsorContainer(new XmlInterpreter());
container.Kernel.AddFacility("rhino.esb", new RhinoServiceBusFacility());
container.AddComponent<MsmqLoadBalancer>();
loadBalancer = container.Resolve<MsmqLoadBalancer>();
}
It blows up on the Resolve call. What am I missing?
I'm assuming that if I can get this working that the new KnownWorkers
public property on MsmqLoadBalancer would be the solution to my
question below, where I want to know the number of workers
participating in a load balanced scenario, correct?
Thanks,
Matt
On Wed, Jan 28, 2009 at 11:05 AM, Matt Burton <[email protected]> wrote:
> I have a scenario where I want to have multiple subscribers to a
> message such that when the message is published each picks it up and
> processes it independently. In terms of config I don't want to have
> the publisher know about each worker node, so I was able to get the
> load balancer concept running and it works just as I had hoped.
>
> Question - the scenario I'm proving out here is one where I'm
> provisioning software to machines, so that I receive a request to
> provision a new tenant and then I publish a message to create a new
> web site for that tenant on N machines. I want to be able to throw a
> new box into the mix and have it participate in the process
> automatically. It would be nice to know whether or not the
> provisioning of the web site was successful on each machine and base
> the completion of the saga on whether or not all boxes chimed in
> saying they were successful. In order to do that, however, I'd need to
> know how many servers were participating, something which looks like
> it would require some tinkering around with the actual subscription
> queues themselves to figure out.
>
> What would you advise in this scenario? Fire and forget for
> provisioning the sites - depend on an external solution to monitor
> errors? Or do I have the workers send back a thumbs up saying that
> they did their job and when all report back call it good? If so, what
> are my options for determining the number of subscribers in the load
> balanced scenario?
>
> Thanks,
> Matt
>
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