/// <summary>
/// Creates an orchestration instance, and raises an event for it, which eventually causes the OnEvent() method in the
/// orchestration to fire.
/// </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="orchestrationInput">Input parameter to the specified TaskOrchestration</param>
/// <param name="dedupeStatuses">States of previous orchestration executions to be considered while de-duping new orchestrations on the client</param>
/// <param name="eventName">Name of the event</param>
/// <param name="eventData">Data for the event</param>
/// <returns>OrchestrationInstance that represents the orchestration that was created</returns>
public Task <OrchestrationInstance> CreateOrchestrationInstanceWithRaisedEventAsync(
Type orchestrationType,
string instanceId,
object orchestrationInput,
OrchestrationStatus[] dedupeStatuses,
string eventName,
object eventData)
{
return(InternalCreateOrchestrationInstanceWithRaisedEventAsync(
NameVersionHelper.GetDefaultName(orchestrationType),
NameVersionHelper.GetDefaultVersion(orchestrationType),
instanceId,
orchestrationInput,
null,
dedupeStatuses,
eventName,
eventData));
}
public ScheduleProxy(OrchestrationContext context, Type @interface, bool useFullyQualifiedMethodNames)
{
this.context = context;
interfaze = @interface;
this.useFullyQualifiedMethodNames = useFullyQualifiedMethodNames;
//If type can be determined by name
returnTypes = interfaze.GetMethods()
.Where(method => !method.IsSpecialName)
.GroupBy(method => NameVersionHelper.GetDefaultName(method))
.Where(group => group.Select(method => method.ReturnType).Distinct().Count() == 1)
.Select(group => new
{
Name = group.Key,
ReturnType = group.Select(method => method.ReturnType).Distinct().Single()
})
.ToDictionary(info => info.Name, info => info.ReturnType);
}
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>
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>
/// 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>
/// <param name="interface">Interface type.</param>
/// <param name="activities">Object that implements the <paramref name="interface"/> 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>
public TaskHubWorker AddTaskActivitiesFromInterface(Type @interface, object activities, bool useFullyQualifiedMethodNames = false)
{
if ([email protected])
{
throw new Exception("Contract can only be an interface.");
}
if ([email protected](activities.GetType()))
{
throw new ArgumentException($"{activities.GetType().FullName} does not implement {@interface.FullName}", nameof(activities));
}
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);
this.activityManager.Add(creator);
}
return(this);
}
void Initialize(object obj)
{
this.Name = NameVersionHelper.GetDefaultName(obj);
this.Version = NameVersionHelper.GetDefaultVersion(obj);
}
/// <summary>
/// Create a sub-orchestration 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 sub-orchestration to create</param>
/// <param name="input">Input for the TaskOrchestration.RunTask method</param>
/// <returns>Task that represents the execution of the specified sub-orchestration</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="TResult">Return Type of the TaskActivity.Execute method</typeparam>
/// <param name="activityType">Type that devices 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 sub-orchestration 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 sub-orchestration</returns>
public virtual Task <T> CreateSubOrchestrationInstanceWithRetry <T>(Type orchestrationType,
RetryOptions retryOptions, object input)
{
return(CreateSubOrchestrationInstanceWithRetry <T>(NameVersionHelper.GetDefaultName(orchestrationType),
NameVersionHelper.GetDefaultVersion(orchestrationType), retryOptions, input));
}
