selfhosting WCF service in WorkerRole

WorkerRole.cs

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Diagnostics;
using System.Linq;
using System.Net;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Threading;
using Microsoft.WindowsAzure;
using Microsoft.WindowsAzure.Diagnostics;
using Microsoft.WindowsAzure.ServiceRuntime;
using Microsoft.WindowsAzure.Storage;
using WcfWorkerRole.Impl;

namespace WcfWorkerRole
{
    public class WorkerRole : RoleEntryPoint
    {
        private WebServiceHost _serviceHost;

        public override void Run()
        {
            // This is a sample worker implementation. Replace with your logic.
            Trace.TraceInformation("WcfWorkerRole entry point called", "Information");

            base.Run();
        }

        public override bool OnStart()
        {
            // Set the maximum number of concurrent connections 
            ServicePointManager.DefaultConnectionLimit = 12;

            // For information on handling configuration changes
            // see the MSDN topic at http://go.microsoft.com/fwlink/?LinkId=166357.

            StartWCFService();

            return base.OnStart();
        }
        private void StartWCFService()
        {
            Trace.TraceInformation("Starting WCF service host...");
            IPEndPoint endpoint = GetInstanceEndpoint("httpIn");
            var address = new Uri(string.Format("http://{0}/", endpoint));

            _serviceHost = new WebServiceHost(typeof(ProductsService), address);

            try
            {
                _serviceHost.Open();
                Trace.TraceInformation("WCF service host started successfully.");
            }
            catch (TimeoutException timeoutException)
            {
                Trace.TraceError("The service operation timed out. {0}", timeoutException.Message);
            }
            catch (CommunicationException communicationException)
            {
                Trace.TraceError("Could not start WCF service host. {0}", communicationException.Message);
            }
        }


        private static IPEndPoint GetInstanceEndpoint(string endpointName)
        {
            if (RoleEnvironment.IsAvailable)
            {
                return RoleEnvironment.CurrentRoleInstance.InstanceEndpoints[endpointName].IPEndpoint;
            }
            return new IPEndPoint(IPAddress.Loopback, int.Parse(ConfigurationManager.AppSettings[endpointName]));
        }


    }
}