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using System.Runtime.CompilerServices; using Microsoft.Practices.Unity.InterceptionExtension; using Microsoft.Practices.EnterpriseLibrary.PolicyInjection.Configuration; using Microsoft.Practices.EnterpriseLibrary.Common.Configuration; using Microsoft.Practices.Unity; using Microsoft.Practices.EnterpriseLibrary.PolicyInjection; namespace ResolvingWithPolicyInjection { /// <summary> /// Extensions methods for UnityContainer /// </summary> public static class UnityContainerExtensionMethods { /// <summary> /// Resolves T and wrapps it with policy injection /// </summary> /// <typeparam name="T">the type to resolve</typeparam> /// <param name="unityContainer">the container the resolving should be done against</param> /// <returns>a resolved object wrapped with Policy Injection</returns> /// <remarks></remarks> public static T ResolveWithPolicyInjection<T>(this UnityContainer unityContainer) { // Resolve from container var resolved = unityContainer.Resolve<T>(); // Wrappa with policy injection return PolicyInjection.Wrap<T>(resolved); } /// <summary> /// Registers a type to be resolved to another /// AND configures policy injection for the type if so configured in app.config /// </summary> /// <typeparam name="TFrom">type to resolve from</typeparam> /// <typeparam name="TTo">type to resolve to</typeparam> /// <param name="unityContainer">the container the resolving should be done against</param> public static void RegisterTypeWithPolicyInjection<TFrom, TTo>(this UnityContainer unityContainer) where TTo : TFrom { // Check if policies are configured var configSource = ConfigurationSourceFactory.Create(); var policyInjectionSection = configSource.GetSection(PolicyInjectionSettings.SectionName); var policySettings = (PolicyInjectionSettings)policyInjectionSection; // add policy settings, if any, to the container if ((policySettings != null)) { policySettings.ConfigureContainer(unityContainer, configSource); } // Set up the container with interception unityContainer.Configure<Interception>().SetInterceptorFor<TFrom>(new TransparentProxyInterceptor()); // Finally register the type in the container - as normal unityContainer.RegisterType<TFrom, TTo>(); } } }

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