Service fabric more than one communication listener for service remoting

Question

I am developing few micro services using Azure Service Fabric. I have some use cases which need the communication between micro services and I read about service remoting https://docs.microsoft.com/en-us/azure/service-fabric/service-fabric-reliable-services-communication-remoting. I just wanted to know is it possible to support more than one listeners in a SF application. E.g. I have an existing stateless web api SF application which is having a listener like below

protected override IEnumerable<ServiceInstanceListener> CreateServiceInstanceListeners()
    {
        return new ServiceInstanceListener[]
        {
            new ServiceInstanceListener(serviceContext => new OwinCommunicationListener(Startup.ConfigureApp, serviceContext, ServiceEventSource.Current, "ServiceEndpoint"))
        };
    }

To the above list, I need to add a ServiceRemotingListener so that I can expose some data from Micro service for others. Is it possible or anything wrong with approach. I have done the Reverse proxy based communication, but bit concerned with the performance(since I am planning to perform a real time read operation from Service 1 to Service 2).

Wouter B Wouter B · Accepted Answer · 2017-06-07T07:04:04

In your CreateServiceInstanceListeners method you are returning an array of listeners. This means that it is possible to create multiple listeners. Just add it like you would with any other array:

protected override IEnumerable<ServiceInstanceListener> CreateServiceInstanceListeners()
{
    return new ServiceInstanceListener[]
    {
        new ServiceInstanceListener(serviceContext => this.CreateServiceRemotingListener(serviceContext), "RemotingListener"),
        new ServiceInstanceListener(serviceContext => new OwinCommunicationListener(Startup.ConfigureApp, serviceContext, ServiceEventSource.Current, "ServiceEndpoint"))
    };
}

Note that even though the listener name is an optional parameter, you have to give your listeners a name. I've also experienced some problems with the service proxy trying to connect to the other endpoint. In order to solve this declare the remoting listener first and your other listeners second.

Service fabric more than one communication listener for service remoting

1 Answers