internal TaskOrchestrationDispatcher(MessagingFactory messagingFactory,
TrackingDispatcher trackingDispatcher,
TaskHubDescription taskHubDescription,
TaskHubWorkerSettings workerSettings,
string orchestratorEntityName,
string workerEntityName,
string trackingEntityName,
NameVersionObjectManager <TaskOrchestration> objectManager)
: base("TaskOrchestration Dispatcher", item => item.Session == null ? string.Empty : item.Session.SessionId)
{
this.taskHubDescription = taskHubDescription;
settings = workerSettings.Clone();
this.orchestratorEntityName = orchestratorEntityName;
this.workerEntityName = workerEntityName;
this.trackingEntityName = trackingEntityName;
this.messagingFactory = messagingFactory;
this.messagingFactory.PrefetchCount = PrefetchCount;
this.objectManager = objectManager;
orchestratorQueueClient = this.messagingFactory.CreateQueueClient(this.orchestratorEntityName);
workerSender = this.messagingFactory.CreateMessageSender(this.workerEntityName, this.orchestratorEntityName);
trackingDipatcher = trackingDispatcher;
if (trackingDipatcher != null)
{
isTrackingEnabled = true;
trackingSender = this.messagingFactory.CreateMessageSender(this.trackingEntityName,
this.orchestratorEntityName);
}
maxConcurrentWorkItems = settings.TaskOrchestrationDispatcherSettings.MaxConcurrentOrchestrations;
}
/// <summary>
/// Creates all the underlying entities in Service bus and Azure Storage (if specified) for
/// the TaskHubWorker and TaskHubClient's operations. If TaskHub already exists then this is a no-op
/// </summary>
public void CreateHubIfNotExists(TaskHubDescription description)
{
NamespaceManager namespaceManager = NamespaceManager.CreateFromConnectionString(connectionString);
IEnumerable <QueueDescription> queueDescriptions =
namespaceManager.GetQueues("startswith(path, '" + hubName + "') eq TRUE");
List <QueueDescription> descriptions = queueDescriptions.ToList();
if (!descriptions.Any(q => string.Equals(q.Path, orchestratorEntityName)))
{
SafeCreateQueue(namespaceManager, orchestratorEntityName, true,
description.MaxTaskOrchestrationDeliveryCount);
}
if (!descriptions.Any(q => string.Equals(q.Path, workerEntityName)))
{
SafeCreateQueue(namespaceManager, workerEntityName, false, description.MaxTaskActivityDeliveryCount);
}
if (!descriptions.Any(q => string.Equals(q.Path, trackingEntityName)))
{
SafeCreateQueue(namespaceManager, trackingEntityName, true, description.MaxTrackingDeliveryCount);
}
if (!string.IsNullOrEmpty(tableStoreConnectionString))
{
var client = new TableClient(hubName, tableStoreConnectionString);
client.CreateTableIfNotExists();
}
}
internal TrackingDispatcher(MessagingFactory messagingFactory,
TaskHubDescription taskHubDescription,
TaskHubWorkerSettings workerSettings,
string tableConnectionString,
string hubName,
string trackingEntityName)
: base("Tracking Dispatcher", item => item == null ? string.Empty : item.Session.SessionId)
{
this.taskHubDescription = taskHubDescription;
settings = workerSettings.TrackingDispatcherSettings.Clone();
this.trackingEntityName = trackingEntityName;
this.messagingFactory = messagingFactory;
this.messagingFactory.PrefetchCount = PrefetchCount;
tableClient = new TableClient(hubName, tableConnectionString);
maxConcurrentWorkItems = settings.MaxConcurrentTrackingSessions;
}
internal TaskActivityDispatcher(MessagingFactory messagingFactory,
TaskHubDescription taskHubDescription,
TaskHubWorkerSettings workerSettings,
string orchestratorQueueName,
string workerQueueName,
NameVersionObjectManager <TaskActivity> objectManager)
: base("TaskActivityDispatcher", item => item.MessageId)
{
this.taskHubDescription = taskHubDescription;
settings = workerSettings.Clone();
this.orchestratorQueueName = orchestratorQueueName;
this.workerQueueName = workerQueueName;
this.messagingFactory = messagingFactory;
this.objectManager = objectManager;
maxConcurrentWorkItems = settings.TaskActivityDispatcherSettings.MaxConcurrentActivities;
}
public void TestMaxDeliveryCountIfNew()
{
var desc = new TaskHubDescription
{
MaxTaskActivityDeliveryCount = 100,
MaxTaskOrchestrationDeliveryCount = 100,
MaxTrackingDeliveryCount = 100,
};
taskHub.CreateHubIfNotExists(desc);
TaskHubDescription retDesc = taskHub.GetTaskHubDescriptionAsync().Result;
Assert.AreEqual(desc.MaxTaskActivityDeliveryCount, retDesc.MaxTaskActivityDeliveryCount);
Assert.AreEqual(desc.MaxTaskOrchestrationDeliveryCount, retDesc.MaxTaskOrchestrationDeliveryCount);
Assert.AreEqual(desc.MaxTrackingDeliveryCount, retDesc.MaxTrackingDeliveryCount);
taskHub.DeleteHub();
}
/// <summary>
/// Creates all the underlying entities in Service bus and Azure Storage (if specified) for
/// the TaskHubWorker and TaskHubClient's operations. If TaskHub already existed then
/// it would be deleted and recreated. Instance store creation can be controlled via parameter.
/// </summary>
public void CreateHub(TaskHubDescription description, bool createInstanceStore)
{
NamespaceManager namespaceManager = NamespaceManager.CreateFromConnectionString(connectionString);
SafeDeleteQueue(namespaceManager, orchestratorEntityName);
SafeDeleteQueue(namespaceManager, workerEntityName);
SafeDeleteQueue(namespaceManager, trackingEntityName);
CreateQueue(namespaceManager, orchestratorEntityName, true, description.MaxTaskOrchestrationDeliveryCount);
CreateQueue(namespaceManager, workerEntityName, false, description.MaxTaskActivityDeliveryCount);
CreateQueue(namespaceManager, trackingEntityName, true, description.MaxTrackingDeliveryCount);
if (!string.IsNullOrEmpty(tableStoreConnectionString) && createInstanceStore)
{
var client = new TableClient(hubName, tableStoreConnectionString);
client.DeleteTableIfExists();
client.CreateTableIfNotExists();
}
}
/// <summary>
/// Starts the TaskHubWorker so it begins processing orchestrations and activities
/// </summary>
/// <returns></returns>
public TaskHubWorker Start()
{
lock (thisLock)
{
if (isStarted)
{
throw new InvalidOperationException("TaskHub is already started");
}
TaskHubDescription taskHubDescription = GetTaskHubDescription();
orchestrationDispatcher =
new TaskOrchestrationDispatcher(Utils.CreateMessagingFactory(connectionString),
string.IsNullOrEmpty(tableStoreConnectionString)
? null
: new TrackingDispatcher(
Utils.CreateMessagingFactory(connectionString),
taskHubDescription,
workerSettings,
tableStoreConnectionString, hubName,
trackingEntityName),
taskHubDescription,
workerSettings,
orchestratorEntityName, workerEntityName,
trackingEntityName, orchestrationManager);
activityDispatcher =
new TaskActivityDispatcher(
Utils.CreateMessagingFactory(connectionString),
taskHubDescription,
workerSettings,
orchestratorEntityName,
workerEntityName,
activityManager);
orchestrationDispatcher.Start();
activityDispatcher.Start();
isStarted = true;
}
return(this);
}
/// <summary>
/// Gets the TaskHubDescription for the configured TaskHub
/// </summary>
/// <returns></returns>
public async Task <TaskHubDescription> GetTaskHubDescriptionAsync()
{
NamespaceManager namespaceManager = NamespaceManager.CreateFromConnectionString(connectionString);
var description = new TaskHubDescription();
IEnumerable <QueueDescription> queueDescriptions =
await namespaceManager.GetQueuesAsync("startswith(path, '" + hubName + "') eq TRUE");
List <QueueDescription> descriptions = queueDescriptions.ToList();
QueueDescription orchestratorQueueDescription =
descriptions.Single(q => string.Equals(q.Path, orchestratorEntityName));
QueueDescription activityQueueDescription = descriptions.Single(q => string.Equals(q.Path, workerEntityName));
QueueDescription trackingQueueDescription =
descriptions.Single(q => string.Equals(q.Path, trackingEntityName));
description.MaxTaskOrchestrationDeliveryCount = orchestratorQueueDescription.MaxDeliveryCount;
description.MaxTaskActivityDeliveryCount = activityQueueDescription.MaxDeliveryCount;
description.MaxTrackingDeliveryCount = trackingQueueDescription.MaxDeliveryCount;
return(description);
}
/// <summary>
/// Creates all the underlying entities in Service bus and Azure Storage (if specified) for
/// the TaskHubWorker and TaskHubClient's operations. If TaskHub already exists then this is a no-op
/// </summary>
public void CreateHubIfNotExists()
{
CreateHubIfNotExists(TaskHubDescription.CreateDefaultDescription());
}
/// <summary>
/// Creates all the underlying entities in Service bus and Azure Storage (if specified) for
/// the TaskHubWorker and TaskHubClient's operations. If TaskHub already existed then
/// it would be deleted and recreated.
/// </summary>
public void CreateHub(TaskHubDescription description)
{
CreateHub(description, true);
}
/// <summary>
/// Creates all the underlying entities in Service bus and Azure Storage (if specified) for
/// the TaskHubWorker and TaskHubClient's operations. If TaskHub already existed then
/// it would be deleted and recreated. Instance store creation can be controlled via parameter.
/// </summary>
public void CreateHub(bool createInstanceStore)
{
CreateHub(TaskHubDescription.CreateDefaultDescription(), createInstanceStore);
}
// Management operations
/// <summary>
/// Creates all the underlying entities in Service bus and Azure Storage (if specified) for
/// the TaskHubWorker and TaskHubClient's operations. If TaskHub already existed then
/// it would be deleted and recreated.
/// </summary>
public void CreateHub()
{
CreateHub(TaskHubDescription.CreateDefaultDescription(), true);
}