/// <summary>
/// Creates new instance from the specified service type.
/// </summary>
/// <param name="serviceType">The concrete type which implements given service contract.</param>
/// <returns>
/// <see cref="ServiceDescription"/>.
/// </returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="serviceType"/> is <c>null</c>.
/// </exception>
/// <exception cref="ArgumentException">
/// <paramref name="serviceType"/> is abstract class or interface.
/// Or, <paramref name="serviceType"/> does not have service contract, that is, it is not marked by <see cref="MessagePackRpcServiceContractAttribute"/>.
/// Or, <paramref name="serviceType"/> does not have publicly visible default constructor.
/// Or, any <see cref="MessagePackRpcServiceContractAttribute"/> property of <paramref name="serviceType"/> is invalid.
/// </exception>
public static ServiceDescription FromServiceType(Type serviceType)
{
if (serviceType == null)
{
throw new ArgumentNullException("serviceType");
}
if (serviceType.IsAbstract)
{
throw new ArgumentException(
String.Format(
CultureInfo.CurrentCulture,
"Service type '{0}' is not concrete type.",
serviceType.AssemblyQualifiedName
),
"serviceType"
);
}
Contract.EndContractBlock();
var serviceContract = Attribute.GetCustomAttribute(serviceType, typeof(MessagePackRpcServiceContractAttribute), true) as MessagePackRpcServiceContractAttribute;
if (serviceContract == null)
{
throw new ArgumentException(
String.Format(
CultureInfo.CurrentCulture,
"Service type '{0}' does not have service contract.",
serviceType.AssemblyQualifiedName
),
"serviceType"
);
}
var serviceName = String.IsNullOrWhiteSpace(serviceContract.Name) ? ServiceIdentifier.TruncateGenericsSuffix(serviceType.Name) : serviceContract.Name;
var ctor = serviceType.GetConstructor(Type.EmptyTypes);
if (ctor == null)
{
throw new ArgumentException(
String.Format(
CultureInfo.CurrentCulture,
"Service type '{0}' does not have public default constructor.",
serviceType.AssemblyQualifiedName
),
"serviceType"
);
}
return
(new ServiceDescription(serviceName, Expression.Lambda <Func <object> >(Expression.New(ctor)).Compile())
{
Version = serviceContract.Version,
_serviceType = serviceType
});
}
/// <summary>
/// Initializes a new instance of the <see cref="AsyncServiceInvoker<T>"/> class.
/// </summary>
/// <param name="runtime">The <see cref="RpcServerRuntime"/> which provides runtime services.</param>
/// <param name="serviceDescription">The service description which defines target operation.</param>
/// <param name="targetOperation">The target operation to be invoked.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="runtime"/> is <c>null</c>.
/// Or, <paramref name="serviceDescription"/> is <c>null</c>.
/// Or, <paramref name="targetOperation"/> is <c>null</c>.
/// </exception>
internal AsyncServiceInvoker(RpcServerRuntime runtime, ServiceDescription serviceDescription, MethodInfo targetOperation)
{
if (runtime == null)
{
throw new ArgumentNullException("runtime");
}
if (serviceDescription == null)
{
throw new ArgumentNullException("serviceDescription");
}
if (targetOperation == null)
{
throw new ArgumentNullException("targetOperation");
}
Contract.EndContractBlock();
this._runtime = runtime;
this._serviceDescription = serviceDescription;
this._targetOperation = targetOperation;
this._operationId = ServiceIdentifier.TruncateGenericsSuffix(targetOperation.Name);
}
