private ConstructorInfo GetSingleConstructor(ServiceImplementationInfo serviceImplementationInfo, Type expectedParameterType)
{
var argumentTypesDoNotMatchMessage = string.Format(
" The public constructor must at least accept an argument of type '{0}'.",
expectedParameterType);
var exceptionMessage = string.Format(
"Type '{0}' cannot be instantiated. The type must have exactly one public constructor.{1}",
serviceImplementationInfo.ImplementationType,
expectedParameterType == null ? "" : argumentTypesDoNotMatchMessage);
var constructors = serviceImplementationInfo.ImplementationType.GetConstructors();
if (constructors.Length != 1)
{
throw new InvalidOperationException(exceptionMessage);
}
var constructor = constructors.First();
if (expectedParameterType != null && constructor.GetParameters().Count(p => p.ParameterType == expectedParameterType) != 1)
{
throw new InvalidOperationException(exceptionMessage);
}
return(constructor);
}
private Func <object> CreateInstanceFactory(
Type serviceType,
ServiceImplementationInfo serviceImplementationInfo,
Func <Func <object>, object> decoratorChain)
{
Func <object> instanceFactory;
if (serviceImplementationInfo.Factory == null)
{
var isCompound = serviceImplementationInfo.RegistrationType == RegistrationType.Compound;
var expectedParameterType = isCompound ? typeof(IEnumerable <>).MakeGenericType(serviceType) : null;
var ctorInfo = GetSingleConstructor(serviceImplementationInfo, expectedParameterType);
instanceFactory = CreateInstanceFactoryFromConstructorInfo(ctorInfo, isCompound);
}
else
{
instanceFactory = serviceImplementationInfo.Factory;
}
Func <object> decoratedFactory = () => decoratorChain(instanceFactory);
switch (serviceImplementationInfo.Lifetime)
{
case LifetimeKind.Singleton:
var factoryContainer = new Lazy <object> (decoratedFactory, LazyThreadSafetyMode.ExecutionAndPublication);
return(() => factoryContainer.Value);
default:
return(decoratedFactory);
}
}
//as extension for IServiceConfigurationRegistry, or drop if did not exist before feature branch or if no longer needed. Obsolete if old API was used in many projects
/// <summary>
/// Registers factories for the specified <typeparamref name="TService"/>.
/// The factories are subsequently invoked whenever instances for the <typeparamref name="TService"/> is requested.
/// </summary>
/// <typeparam name="TService">The service type to register the factories for.</typeparam>
/// <param name="serviceConfigurationRegistry">The <see cref="IServiceConfigurationRegistry"/> with which to register the <typeparamref name="TService"/>.</param>
/// <param name="instanceFactories">The instance factories to use when resolving instances for the <typeparamref name="TService"/>. These factories
/// must return non-null instances implementing the <typeparamref name="TService"/>, otherwise an <see cref="ActivationException"/> is thrown
/// when an instance of <typeparamref name="TService"/> is requested.</param>
/// <exception cref="InvalidOperationException">Factories have already been registered or an instance of the <typeparamref name="TService"/> has
/// already been retrieved. Registering factories or concrete implementations can only be done before any instances are retrieved.</exception>
public static void RegisterMultiple <TService> (this IServiceConfigurationRegistry serviceConfigurationRegistry, IEnumerable <Func <TService> > instanceFactories)
where TService : class
{
ArgumentUtility.CheckNotNull("serviceConfigurationRegistry", serviceConfigurationRegistry);
ArgumentUtility.CheckNotNull("instanceFactories", instanceFactories);
var serviceConfigurationEntry = new ServiceConfigurationEntry(
typeof(TService),
instanceFactories.Select(f => ServiceImplementationInfo.CreateMultiple(f, LifetimeKind.InstancePerDependency)));
serviceConfigurationRegistry.Register(serviceConfigurationEntry);
}
//TODO RM-5506: register api:
//registerSingle(this IServiceConfigurationRegistry registry, Type serviceType, Type implementationType, Type[] decoratorTypes = null, LifetimeKind = Instance)
//registerMultiple(this IServiceConfigurationRegistry registry, Type serviceType, Type[] implementationType, Type[] decoratorTypes = null, LifetimeKind = Instance)
//registerCompound(this IServiceConfigurationRegistry registry, Type serviceType, Type compoundType, Type[] implementationTypes, Type[] decoratorTypes = null, LifetimeKind = Instance)
//registerSingle(this IServiceConfigurationRegistry registry, Type serviceType, Func<object> instanceFactory, Type[] decoratorTypes = null, LifetimeKind = Instance
//registerMultiple(this IServiceConfigurationRegistry registry, Type serviceType, Func<object>[] instanceFactories, Type[] decoratorTypes = null, LifetimeKind = Instance
//registerCompound(this IServiceConfigurationRegistry registry, Type serviceType, Type compoundType, Func<object>[] instanceFactories, Type[] decoratorTypes = null, LifetimeKind = Instance
/// <summary>
/// Registers factories for the specified <typeparamref name="TService"/>.
/// The factories are subsequently invoked whenever instances for the <typeparamref name="TService"/> is requested.
/// </summary>
/// <typeparam name="TService">The service type to register the factories for.</typeparam>
/// <param name="serviceConfigurationRegistry">The <see cref="IServiceConfigurationRegistry"/> with which to register the <typeparamref name="TService"/>.</param>
/// <param name="instanceFactory">The instance factory to use when resolving instances for the <typeparamref name="TService"/>. This factory
/// must return a non-null instance implementing the <typeparamref name="TService"/>, otherwise an <see cref="ActivationException"/> is thrown
/// when an instance of <typeparamref name="TService"/> is requested.</param>
/// <exception cref="InvalidOperationException">Factories have already been registered or an instance of the <typeparamref name="TService"/> has
/// already been retrieved. Registering factories or concrete implementations can only be done before any instances are retrieved.</exception>
public static void RegisterSingle <TService> (this IServiceConfigurationRegistry serviceConfigurationRegistry, Func <TService> instanceFactory)
where TService : class
{
ArgumentUtility.CheckNotNull("serviceConfigurationRegistry", serviceConfigurationRegistry);
ArgumentUtility.CheckNotNull("instanceFactory", instanceFactory);
var serviceConfigurationEntry = new ServiceConfigurationEntry(
typeof(TService),
ServiceImplementationInfo.CreateSingle(instanceFactory, LifetimeKind.InstancePerDependency));
serviceConfigurationRegistry.Register(serviceConfigurationEntry);
}
/// <summary>
/// Registers a concrete implementation for the specified <paramref name="serviceType"/>.
/// </summary>
/// <param name="serviceConfigurationRegistry">The <see cref="IServiceConfigurationRegistry"/> with which to register the <paramref name="serviceType"/>.</param>
/// <param name="serviceType">The service type to register a concrete implementation for.</param>
/// <param name="concreteImplementationType">The type of the concrete implementation to be instantiated when an instance of the
/// <paramref name="serviceType"/> is retrieved.</param>
/// <param name="lifetime">The lifetime of the instances.</param>
/// <param name="registrationType">The registration type of the implementation.</param>
/// <exception cref="InvalidOperationException">An instance of the <paramref name="serviceType"/> has already been retrieved. Registering factories
/// or concrete implementations can only be done before any instances are retrieved.</exception>
public static void Register(this IServiceConfigurationRegistry serviceConfigurationRegistry, Type serviceType, Type concreteImplementationType, LifetimeKind lifetime, RegistrationType registrationType = RegistrationType.Single)
{
ArgumentUtility.CheckNotNull("serviceConfigurationRegistry", serviceConfigurationRegistry);
ArgumentUtility.CheckNotNull("serviceType", serviceType);
ArgumentUtility.CheckNotNull("concreteImplementationType", concreteImplementationType);
var serviceImplemetation = new ServiceImplementationInfo(concreteImplementationType, lifetime, registrationType);
ServiceConfigurationEntry serviceConfigurationEntry;
try
{
serviceConfigurationEntry = new ServiceConfigurationEntry(serviceType, serviceImplemetation);
}
catch (ArgumentException ex)
{
throw new ArgumentException("Implementation type must implement service type.", "concreteImplementationType", ex);
}
serviceConfigurationRegistry.Register(serviceConfigurationEntry);
}
