ServiceRouteHandler.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / System.ServiceModel.Activation / System / ServiceModel / Activation / ServiceRouteHandler.cs / 1305376 / ServiceRouteHandler.cs
                        
                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------

namespace System.ServiceModel.Activation 
{
    using System; 
    using System.Collections; 
    using System.Collections.Generic;
    using System.Diagnostics; 
    using System.Globalization;
    using System.Linq;
    using System.Runtime;
    using System.ServiceModel; 
    using System.ServiceModel.Activation;
    using System.ServiceModel.Diagnostics; 
    using System.ServiceModel.Diagnostics.Application; 
    using System.Web;
    using System.Web.Hosting; 
    using System.Web.Routing;

    class ServiceRouteHandler : IRouteHandler
    { 
        string baseAddress;
        IHttpHandler handler; 
        object locker = new object(); 
        [Fx.Tag.Cache(
                typeof(ServiceDeploymentInfo), 
                Fx.Tag.CacheAttrition.None,
                Scope = "instance of declaring class",
                SizeLimit = "unbounded",
                Timeout = "infinite" 
                )]
        static Hashtable routeServiceTable = new Hashtable(StringComparer.CurrentCultureIgnoreCase); 
 
        public ServiceRouteHandler(string baseAddress, ServiceHostFactoryBase serviceHostFactory, Type webServiceType)
        { 
            this.baseAddress = string.Format(CultureInfo.CurrentCulture, "~/{0}", baseAddress);
            if (webServiceType == null)
            {
                throw FxTrace.Exception.AsError(new ArgumentNullException("webServiceType")); 
            }
            if (serviceHostFactory == null) 
            { 
                throw FxTrace.Exception.AsError(new ArgumentNullException("serviceHostFactory"));
            } 
            string serviceType = webServiceType.AssemblyQualifiedName;

            AddServiceInfo(this.baseAddress, new ServiceDeploymentInfo(this.baseAddress, serviceHostFactory, serviceType));
        } 

        public IHttpHandler GetHttpHandler(RequestContext requestContext) 
        { 
            // we create httphandler only we the request map to the corresponding route.
            // we thus do not need to check whether the baseAddress has been added 
            // even though Asp.Net allows duplicated routes but it picks the first match
            if (handler == null)
            {
                // use local lock to prevent multiple httphanders from being created 
                lock (locker)
                { 
                    if (handler == null) 
                    {
                        handler = new AspNetRouteServiceHttpHandler(this.baseAddress); 
                        MarkRouteAsActive(this.baseAddress);
                    }
                }
            } 
            return handler;
        } 
 
        static void AddServiceInfo(string virtualPath, ServiceDeploymentInfo serviceInfo)
        { 
            Fx.Assert(!string.IsNullOrEmpty(virtualPath), "virtualPath should not be empty or null");
            Fx.Assert(serviceInfo != null, "serviceInfo should not be null");
            // We cannot support dulicated route routes even Asp.Net route allows it
            try 
            {
                routeServiceTable.Add(virtualPath, serviceInfo); 
            } 
            catch (ArgumentException)
            { 
                throw FxTrace.Exception.Argument("virtualPath", SR.Hosting_RouteHasAlreadyBeenAdded(virtualPath));
            }
        }
 
        public static ServiceDeploymentInfo GetServiceInfo(string normalizedVirtualPath)
        { 
            return (ServiceDeploymentInfo)routeServiceTable[normalizedVirtualPath]; 
        }
 
        public static bool IsActiveAspNetRoute(string virtualPath)
        {
            bool isRouteService = false;
            if (!string.IsNullOrEmpty(virtualPath)) 
            {
                ServiceDeploymentInfo serviceInfo = (ServiceDeploymentInfo)routeServiceTable[virtualPath]; 
                if (serviceInfo != null) 
                {
                    isRouteService = serviceInfo.MessageHandledByRoute; 
                }
            }
            return isRouteService;
        } 

        // A route in routetable does not always mean the route will be picked 
        // we update IsRouteService only when Asp.Net picks this route 
        public static void MarkRouteAsActive(string normalizedVirtualPath)
        { 
            ServiceDeploymentInfo serviceInfo = (ServiceDeploymentInfo)routeServiceTable[normalizedVirtualPath];
            if (serviceInfo != null)
            {
                serviceInfo.MessageHandledByRoute = true; 
            }
        } 
        // a route should be marked as inactive in the case that CBA should be used 
        public static void MarkARouteAsInactive(string normalizedVirtualPath)
        { 
            ServiceDeploymentInfo serviceInfo = (ServiceDeploymentInfo)routeServiceTable[normalizedVirtualPath];
            if (serviceInfo != null)
            {
                serviceInfo.MessageHandledByRoute = false; 
            }
        } 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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ServiceRouteHandler.cs source code in C# .NET

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