public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)
{
Type returnType = null;
if (!returnTypes.TryGetValue(binder.Name, out returnType))
{
throw new Exception("Method name '" + binder.Name + "' not known.");
}
string normalizedMethodName = useFullyQualifiedMethodNames
? NameVersionHelper.GetFullyQualifiedMethodName(interfaze.Name, NameVersionHelper.GetDefaultName(binder))
: NameVersionHelper.GetDefaultName(binder);
if (returnType.Equals(typeof(Task)))
{
result = context.ScheduleTask <object>(normalizedMethodName,
NameVersionHelper.GetDefaultVersion(binder), args);
}
else
{
if (!returnType.IsGenericType)
{
throw new Exception("Return type is not a generic type. Type Name: " + returnType.FullName);
}
Type[] genericArguments = returnType.GetGenericArguments();
if (genericArguments.Length != 1)
{
throw new Exception("Generic Parameters are not equal to 1. Type Name: " + returnType.FullName);
}
MethodInfo scheduleMethod = typeof(OrchestrationContext).GetMethod("ScheduleTask",
new[] { typeof(string), typeof(string), typeof(object[]) });
MethodInfo genericScheduleMethod = scheduleMethod.MakeGenericMethod(genericArguments[0]);
result = genericScheduleMethod.Invoke(context, new object[]
{
normalizedMethodName,
NameVersionHelper.GetDefaultVersion(binder), args
});
}
return(true);
}
/// <summary>
/// Infers and adds every method in the specified interface T on the
/// passed in object as a different TaskActivity with Name set to the method name
/// and version set to an empty string. Methods can then be invoked from task orchestrations
/// by calling ScheduleTask(name, version) with name as the method name and string.Empty as the version.
/// </summary>
/// <typeparam name="T">Interface</typeparam>
/// <param name="activities">Object that implements this interface</param>
/// <param name="useFullyQualifiedMethodNames">
/// If true, the method name translation from the interface contains
/// the interface name, if false then only the method name is used
/// </param>
/// <returns></returns>
public TaskHubWorker AddTaskActivitiesFromInterface <T>(T activities, bool useFullyQualifiedMethodNames)
{
Type @interface = typeof(T);
if ([email protected])
{
throw new Exception("Contract can only be an interface.");
}
foreach (MethodInfo methodInfo in @interface.GetMethods())
{
TaskActivity taskActivity = new ReflectionBasedTaskActivity(activities, methodInfo);
ObjectCreator <TaskActivity> creator =
new NameValueObjectCreator <TaskActivity>(
NameVersionHelper.GetDefaultName(methodInfo, useFullyQualifiedMethodNames),
NameVersionHelper.GetDefaultVersion(methodInfo), taskActivity);
activityManager.Add(creator);
}
return(this);
}
/// <summary>
/// Create a new orchestration of the specified type with the specified instance id
/// </summary>
/// <param name="orchestrationType">Type that derives from TaskOrchestration</param>
/// <param name="instanceId">Instance id for the orchestration to be created, must be unique across the Task Hub</param>
/// <param name="input">Input parameter to the specified TaskOrchestration</param>
/// <returns>OrchestrationInstance that represents the orchestration that was created</returns>
public Task <OrchestrationInstance> CreateOrchestrationInstanceAsync(Type orchestrationType, string instanceId,
object input)
{
return(CreateOrchestrationInstanceAsync(NameVersionHelper.GetDefaultName(orchestrationType),
NameVersionHelper.GetDefaultVersion(orchestrationType), instanceId, input));
}
void Initialize(object obj)
{
Name = NameVersionHelper.GetDefaultName(obj);
Version = NameVersionHelper.GetDefaultVersion(obj);
}
/// <summary>
/// Create a suborchestration of the specified type with the specified instance id
/// </summary>
/// <typeparam name="T">Return Type of the TaskOrchestration.RunTask method</typeparam>
/// <param name="orchestrationType">Type of the TaskOrchestration derived class to instantiate</param>
/// <param name="instanceId">InstanceId of the suborchestration to create</param>
/// <param name="input">Input for the TaskOrchestration.RunTask method</param>
/// <returns>Task that represents the execution of the specified suborchestration</returns>
public virtual Task <T> CreateSubOrchestrationInstance <T>(Type orchestrationType, string instanceId, object input)
{
return(CreateSubOrchestrationInstance <T>(NameVersionHelper.GetDefaultName(orchestrationType),
NameVersionHelper.GetDefaultVersion(orchestrationType), instanceId, input));
}
/// <summary>
/// Schedule a TaskActivity by type.
/// </summary>
/// <typeparam name="T">Return Type of the TaskActivity.Exeute method</typeparam>
/// <param name="taskActivityType">Type that dervices from TaskActivity class</param>
/// <param name="parameters">Parameters for the TaskActivity.Execute method</param>
/// <returns>Task that represents the execution of the specified TaskActivity</returns>
public virtual Task <TResult> ScheduleTask <TResult>(Type activityType, params object[] parameters)
{
return(ScheduleTask <TResult>(NameVersionHelper.GetDefaultName(activityType),
NameVersionHelper.GetDefaultVersion(activityType), parameters));
}
/// <summary>
/// Create a suborchestration of the specified type. Also retry on failure as per supplied policy.
/// </summary>
/// <typeparam name="T">Return Type of the TaskOrchestration.RunTask method</typeparam>
/// <param name="orchestrationType">Type of the TaskOrchestration derived class to instantiate</param>
/// <param name="retryOptions">Retry policy</param>
/// <param name="input">Input for the TaskOrchestration.RunTask method</param>
/// <returns>Task that represents the execution of the specified suborchestration</returns>
public virtual Task <T> CreateSubOrchestrationInstanceWithRetry <T>(Type orchestrationType,
RetryOptions retryOptions, object input)
{
return(CreateSubOrchestrationInstanceWithRetry <T>(NameVersionHelper.GetDefaultName(orchestrationType),
NameVersionHelper.GetDefaultVersion(orchestrationType), retryOptions, input));
}