Windsor IHandlerSelector in RIA Services Visual Studio 2010 Beta2 - castle-windsor

Question

I want to implement multi tenancy using Windsor and i don't know how to handle this situation:
i succesfully used this technique in plain ASP.NET MVC projects and thought incorporating in a RIA Services project would be similar.
So i used IHandlerSelector, registered some components and wrote an ASP.NET MVC view to verify it works in a plain ASP.NET MVC environment. And it did!
Next step was to create a DomainService which got an IRepository injected in the constructor. This service is hosted in the ASP.NET MVC application. And it actually ... works:i can get data out of it to a Silverlight application.
Sample snippet:
public OrganizationDomainService(IRepository<Culture> cultureRepository)
{
this.cultureRepository = cultureRepository;
}
Last step is to see if it works multi-tenant-like: it does not! The weird thing is this:
using some line of code and writing debug messages in a log file i verified that the correct handler is selected! BUT this handler seems not to be injected in the DomainService. I ALWAYS get the first handler (that's the logic in my SelectHandler)
Can anybody verify this behavior? Is injection not working in RIA Services? Or am i missing something basic??
Development environment: Visual Studio 2010 Beta2
Thanks in advance

Answer 1

So it seems i did a very weird thing in my OrganizationDomainServiceFactory.
The code which did NOT work is this:
public DomainService CreateDomainService(Type domainServiceType, DomainServiceContext context )
{
WindsorContainer container = new WindsorContainer(new XmlInterpreter(new ConfigResource("castle")));
IRepository<Culture> cultureRepository = container.Resolve<IRepository<Culture>>();
IRepository<Currency> currencyRepository = container.Resolve<IRepository<Currency>>();
DomainService ds = (DomainService)Activator.CreateInstance(domainServiceType, new object[] { cultureRepository,currencyRepository });
ds.Initialize(context);
return ds;
}
This is apparently not working, because of the creation of a new Container (which should not take place).
OK! So i thought i try to use ServiceLocator to get a reference to the Windsor Container (used in the WindsorControllerFactory - that's how i call it ... in the boot up of the ASP.NET MVC application), and changed the code to this:
public DomainService CreateDomainService(Type domainServiceType, DomainServiceContext context )
{
IRepository<Culture> cultureRepository = ServiceLocator.Current.GetInstance<IRepository<Culture>>();
IRepository<Currency> currencyRepository = ServiceLocator.Current.GetInstance<IRepository<Currency>>();
DomainService ds = (DomainService)Activator.CreateInstance(domainServiceType, new object[] { cultureRepository,currencyRepository });
ds.Initialize(context);
return ds;
}
and guess what: it works(!!!) multi-tenancy as it should be!
The only thing i don't know is: is there another way to "inject" the container (constructor injection seems not to work here , the compiler complains)
BTW: moved the project from VS2010Beta2 to VS2010RC (with RIA Services support), but this should not affect the outcome!

Answer 2

Yes i have seen this thread and i already have implemented this.
Firstly have in mind that i have used this line in Global.asax.cs to get the RIA services properly behave (hosted in an ASP.NET MVC view)
routes.IgnoreRoute("{*allsvc}", new { allsvc = #".*\.svc(/.*)?" });
Here is some code:
public class HostBasedComponentSelector : IHandlerSelector
{
private readonly Type[] selectableTypes;
public HostBasedComponentSelector(params Type[] selectableTypes)
{
this.selectableTypes = selectableTypes;
}
public bool HasOpinionAbout(string key, Type service)
{
foreach (var type in selectableTypes)
{
if (service == type) return true;
}
return false;
}
public IHandler SelectHandler(string key, Type service, IHandler[] handlers)
{
//only for debug
StreamWriter sw = new StreamWriter(#"c:\temp\Debug.log",true);
sw.WriteLine(DateTime.Now + " " + service.Name + " " + GetHostname() );
sw.WriteLine("Available handlers");
foreach(IHandler h in handlers )
{
sw.WriteLine ("Handler "+h.ComponentModel.Name);
}
var id = string.Format("{0}:{1}", service.Name, GetHostname());
var selectedHandler = handlers.Where(h => h.ComponentModel.Name == id).FirstOrDefault() ??
GetDefaultHandler(service, handlers);
sw.WriteLine("Selected handler " + selectedHandler.ComponentModel.Name);
sw.WriteLine("----------- END ----------");
sw.Flush();
sw.Close();
return selectedHandler;
}
private IHandler GetDefaultHandler(Type service, IHandler[] handlers)
{
if (handlers.Length == 0)
{
throw new ApplicationException("No components registered for service {0} With service.Name" + service.Name);
}
return handlers[0];
}
protected string GetHostname()
{
return HttpContext.Current.Request.ServerVariables["SERVER_NAME"];
}
}
Here is the complete web.config. Notice registering the OrganizationDomainServiceFactory (it is the implementation of the article you mentioned)
<?xml version="1.0"?>
<!--
For more information on how to configure your ASP.NET application, please visit
http://go.microsoft.com/fwlink/?LinkId=152368
-->
<configuration>
<configSections>
<section name="castle" type="Castle.Windsor.Configuration.AppDomain.CastleSectionHandler,Castle.Windsor"/>
</configSections>
<connectionStrings>
<add name="ApplicationServices" connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|aspnetdb.mdf;User Instance=true" providerName="System.Data.SqlClient"/>
</connectionStrings>
<castle>
<properties>
<sqlConnStr>
<!--metadata=res://*/WebShop.csdl|res://*/WebShop.ssdl|res://*/WebShop.msl;provider=System.Data.SqlClient;provider connection string="Data Source=.\SQLEXPRESS;Initial Catalog=iWebShop;User ID=sa;Password=xxx;MultipleActiveResultSets=True"-->
</sqlConnStr>
</properties>
<components>
<component id="CommonObjectContext" service="TestRIA1.Abstract.IObjectContext, TestRIA1" type="TestRIA1.Concrete.ObjectContextAdapter, TestRIA1" lifestyle="PerWebRequest">
</component>
<component id="IConnectionStringProvider:test.gammasys.gr" service="TestRIA1.Abstract.IConnectionStringProvider, TestRIA1" type="TestRIA1.Concrete.ConnectionStringProvider, TestRIA1" lifestyle="transient">
<parameters>
<ConnectionString>
metadata=res://*/WebShop.csdl|res://*/WebShop.ssdl|res://*/WebShop.msl;provider=System.Data.SqlClient;provider connection string="Data Source=.\SQLEXPRESS;Initial Catalog=iWebShop;User ID=sa;Password=xxx;MultipleActiveResultSets=True"
</ConnectionString>
</parameters>
</component>
<component id="IConnectionStringProvider:test.deltasys.gr" service="TestRIA1.Abstract.IConnectionStringProvider, TestRIA1" type="TestRIA1.Concrete.ConnectionStringProvider, TestRIA1" lifestyle="transient">
<parameters>
<ConnectionString>
metadata=res://*/WebShop.csdl|res://*/WebShop.ssdl|res://*/WebShop.msl;provider=System.Data.SqlClient;provider connection string="Data Source=.\SQLEXPRESS;Initial Catalog=iWebShop2;User ID=sa;Password=xxx;MultipleActiveResultSets=True"
</ConnectionString>
</parameters>
</component>
<component id="Commonrepository" service="TestRIA1.Abstract.IRepository`1, TestRIA1" type="TestRIA1.Concrete.Repository`1, TestRIA1" lifestyle="PerWebRequest"/>
<component id="urlbased.handlerselector" service="Castle.MicroKernel.IHandlerSelector, Castle.MicroKernel" type="TestRIA1.HostBasedComponentSelector, TestRIA1" lifestyle="transient">
<parameters>
<selectableTypes>
<array>
<item>TestRIA1.Abstract.IConnectionStringProvider, TestRIA1</item>
</array>
</selectableTypes>
</parameters>
</component>
</components>
</castle>
<system.web>
<compilation debug="true" targetFramework="4.0">
<assemblies>
<add assembly="System.Web.Abstractions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add assembly="System.Web.Routing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add assembly="System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
</assemblies>
</compilation>
<authentication mode="Forms">
<forms loginUrl="~/Account/LogOn" timeout="2880"/>
</authentication>
<membership>
<providers>
<clear/>
<add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/"/>
</providers>
</membership>
<profile>
<providers>
<clear/>
<add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/"/>
</providers>
</profile>
<roleManager enabled="false">
<providers>
<clear/>
<add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/"/>
<add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/"/>
</providers>
</roleManager>
<pages>
<namespaces>
<add namespace="System.Web.Mvc"/>
<add namespace="System.Web.Mvc.Ajax"/>
<add namespace="System.Web.Mvc.Html"/>
<add namespace="System.Web.Routing"/>
</namespaces>
</pages>
<httpHandlers>
<add verb="*" path="*.mvc" validate="false" type="System.Web.Mvc.MvcHttpHandler"/>
</httpHandlers>
<httpModules>
<add name="PerRequestLifestyle" type="Castle.MicroKernel.Lifestyle.PerWebRequestLifestyleModule,Castle.MicroKernel " />
<add name="DomainServiceModule" type="System.Web.Ria.Services.DomainServiceHttpModule, System.Web.Ria, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
</httpModules>
</system.web>
<system.webServer>
<validation validateIntegratedModeConfiguration="false" />
<modules runAllManagedModulesForAllRequests="true">
<add name="DomainServiceModule" preCondition="managedHandler"
type="System.Web.Ria.Services.DomainServiceHttpModule, System.Web.Ria, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<remove name="PerRequestLifestyle"/>
<add name="PerRequestLifestyle" preCondition="managedHandler" type="Castle.MicroKernel.Lifestyle.PerWebRequestLifestyleModule,Castle.MicroKernel" />
<!--to get IoC initialization of DomainService -->
<add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add name="OrganizationDomainServiceFactory" type="TestRIA1.OrganizationDomainServiceFactory"/>
<!-- End of IoC initial..... -->
</modules>
<handlers>
<remove name="MvcHttpHandler" />
<add name="MvcHttpHandler" preCondition="integratedMode" verb="*"
path="*.mvc" type="System.Web.Mvc.MvcHttpHandler" />
</handlers>
</system.webServer>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35"/>
<bindingRedirect oldVersion="1.0.0.0" newVersion="2.0.0.0"/>
</dependentAssembly>
</assemblyBinding>
</runtime>
<system.serviceModel>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true" />
</system.serviceModel>
</configuration>
Hope this is enough. In case you would like to have the complete project i can send you a copy (this is a pre-production test project).
Thank you very much for the time you spend!