Jul 2, 2018

Pass Dynamics 365 execution context to ASB (TwoWay), use Listner and retrieve back via Azure Aware Plug-in

Last time we understood how to pass the Dynamics 365 Plug-in context to Azure Service Bus without a Queue, but with a Listener. Let's extend our experience by using a TwoWay Designation type and Azure Aware Plug-in to retrieve contact back from end-point.

a) Register TwoWay Endpoint

As we did many times, Copy the Connection String from Policy of Azure Service Bus.


Now copy in the Service End Point entry of Plug-in Registration Tool.


In resulting detail page, change do below changes;
a. Select TwoWay for the Designation Type
b. Add https: to Namespace Address
c. Give a name to Path.


b) Implement Listener

Now implement below Listener code in new Console Application.

Need to install below Nuget Packages;
a. Microsoft.Crm.Sdk.CoreAssemblies
b. WindowsAzure.ServiceBus

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.Xrm.Sdk;
using Microsoft.ServiceBus.Messaging;
using System.Runtime.Remoting.Contexts;
using System.ServiceModel;
using Microsoft.ServiceBus;

namespace AsbListnerTwoWay
{
    class Program
    {
        static void Main(string[] args)
        {
            string asbAccessKeyName = "Sum1ServiceBusPolicy";
            string asbAccessKey = "7WxSLRMvYF0A3HbLUgfQeqIEb1eKsHgg5mrUwc=";
            string asbEndPoint = "https://sumeservicebus1.servicebus.windows.net";

            var serviceHost = new ServiceHost(typeof(TwoWayServiceEndpoint));
            var transportClient = new TransportClientEndpointBehavior(TokenProvider.CreateSharedAccessSignatureTokenProvider(asbAccessKeyName, asbAccessKey));
            serviceHost.AddServiceEndpoint(typeof(ITwoWayServiceEndpointPlugin), new WS2007HttpRelayBinding(), asbEndPoint).EndpointBehaviors.Add(transportClient);
            serviceHost.Open();
            Console.ReadLine();
        }
    }

    public class TwoWayServiceEndpoint : ITwoWayServiceEndpointPlugin
    {
        string ITwoWayServiceEndpointPlugin.Execute(RemoteExecutionContext executionContext)
        {
            string message = executionContext.PrimaryEntityId.ToString();
            Console.WriteLine("Record Id : {0}", message);
            return message;
        }
    }
}

c) Implement Azure Aware Plug-in

Now read Service End Point Id by going to properties of the entry we created in first step as below;


..and implement a Plug-code (for Account Post Create). This code consist of Service End Point reference which uses the Id we read above.

using System;
using Microsoft.Xrm.Sdk;

namespace SumeTrial3Plugin
{
    public class AccountPostCreate : IPlugin
    {
        public void Execute(IServiceProvider serviceProvider)
        {
            Guid serviceEndPointId = new Guid("63c5c746-e07d-e811-a967-000d3ad1c0d2");
            IPluginExecutionContext pluginContext = 
                (IPluginExecutionContext)serviceProvider.GetService(typeof(IPluginExecutionContext));
            ITracingService tracingService = (ITracingService)serviceProvider.GetService(typeof(ITracingService));
            IServiceEndpointNotificationService service = 
                (IServiceEndpointNotificationService)serviceProvider.GetService(typeof(IServiceEndpointNotificationService));

            try
            {
                tracingService.Trace("Passing Context to Service Endpoint");
                string response = service.Execute(new EntityReference("serviceendpoint",serviceEndPointId), pluginContext);
                if (!String.IsNullOrEmpty(response))
                {
                    tracingService.Trace("response : {0}", response);
                }
                tracingService.Trace("Plug-in completed");
            }

            catch (Exception ex)
            {
                tracingService.Trace("Error: {0}", ex.Message);
                throw;
            }
        }
    }
}

Then register this plug-in as usual through Plug-in registration tool.


d) Test the operation

Now execute the Console Application (Listener) and Create an Account in Dynamics 365. You will notice below two;

1) Console Application/ Listener program pics the Context and write the Id.


2) If you check, Plug-in Trace Log, you will see the response has been retrieved by the Plug-in back.


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