void IActivityEventListener <CorrelationTokenEventArgs> .OnEvent(object sender, CorrelationTokenEventArgs dataChangeEventArgs)
{
if (sender == null)
{
throw new ArgumentException("sender");
}
if (dataChangeEventArgs == null)
{
throw new ArgumentException("dataChangeEventArgs");
}
ActivityExecutionContext context = sender as ActivityExecutionContext;
Activity activity = context.Activity;
ICollection <CorrelationProperty> correlationValues = dataChangeEventArgs.CorrelationToken.Properties;
if (dataChangeEventArgs.IsInitializing)
{
CreateSubscription(this.instanceId, context, correlationValues);
return;
}
if (queueName != null)
{
if (!CorrelationResolver.IsInitializingMember(queueName.InterfaceType, queueName.MethodName,
correlationValues == null ? null : new object[] { correlationValues }))
{
DeleteSubscription(context);
}
}
dataChangeEventArgs.CorrelationToken.UnsubscribeFromCorrelationTokenInitializedEvent(activity, this);
}
private static void CreateFollowerEntry(IServiceProvider context, Type interfaceType, string followermethodName, string initializermethodName)
{
if (!CorrelationResolver.IsInitializingMember(interfaceType, initializermethodName, null))
{
return;
}
WorkflowQueuingService queueSvcs = (WorkflowQueuingService)context.GetService(typeof(WorkflowQueuingService));
FollowerQueueCreator follower = new FollowerQueueCreator(followermethodName);
WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Information, 0, "Creating follower {0} on initializer {1}", interfaceType.Name + followermethodName, interfaceType.Name + initializermethodName);
ICollection <CorrelationProperty> corrValues = CorrelationResolver.ResolveCorrelationValues(interfaceType, initializermethodName, null, true);
EventQueueName key = new EventQueueName(interfaceType, initializermethodName, corrValues);
WorkflowQueue initializerQueue = null;
if (queueSvcs.Exists(key))
{
initializerQueue = queueSvcs.GetWorkflowQueue(key);
}
else
{
// traversed follower before initializer
initializerQueue = queueSvcs.CreateWorkflowQueue(key, true);
initializerQueue.Enabled = false;
}
initializerQueue.RegisterForQueueItemArrived(follower);
}
internal static void InvalidateCorrelationToken(Activity activity, Type interfaceType, string methodName, object[] messageArgs)
{
object correlationProvider = CorrelationResolver.GetCorrelationProvider(interfaceType);
if (correlationProvider is NonCorrelatedProvider)
{
return;
}
CorrelationToken reference = GetCorrelationToken(activity);
ICollection <CorrelationProperty> correlationvalues = CorrelationResolver.ResolveCorrelationValues(interfaceType, methodName, messageArgs, false);
if (!CorrelationResolver.IsInitializingMember(interfaceType, methodName, messageArgs))
{
if (!reference.Initialized)
{
throw new InvalidOperationException(SR.GetString(SR.Error_CorrelationNotInitialized, reference.Name, activity.QualifiedName));
}
ValidateCorrelation(reference.Properties, correlationvalues, reference.Name, activity);
return;
}
// invalidate correlation token if methodName is an initializer
reference.Initialize(activity, correlationvalues);
}
internal static IComparable ResolveQueueName(Activity activity, Type interfaceType, string methodName)
{
if (activity == null)
{
throw new ArgumentNullException("activity");
}
if (interfaceType == null)
{
throw new ArgumentNullException("interfaceType");
}
if (methodName == null)
{
throw new ArgumentNullException("methodName");
}
if (CorrelationResolver.IsInitializingMember(interfaceType, methodName, null))
{
return(new EventQueueName(interfaceType, methodName, CorrelationResolver.ResolveCorrelationValues(interfaceType, methodName, null, true)));
}
CorrelationToken correlationToken = GetCorrelationToken(activity);
if (!correlationToken.Initialized)
{
return(null);
}
return(new EventQueueName(interfaceType, methodName, correlationToken.Properties));
}
internal static IComparable ResolveQueueName(Activity activity, Type interfaceType, string methodName)
{
if (activity == null)
{
throw new ArgumentNullException("activity");
}
if (interfaceType == null)
{
throw new ArgumentNullException("interfaceType");
}
if (methodName == null)
{
throw new ArgumentNullException("methodName");
}
// resolver will check for an explicit correlation provider,
// if none present this will return an uncorrelated provider.
// note, an uncorrelated methodName will always be an initializer
if (CorrelationResolver.IsInitializingMember(interfaceType, methodName, null))
{
ICollection <CorrelationProperty> corrvalues = CorrelationResolver.ResolveCorrelationValues(interfaceType, methodName, null, true);
return(new EventQueueName(interfaceType, methodName, corrvalues));
}
CorrelationToken reference = GetCorrelationToken(activity);
if (!reference.Initialized)
{
return(null);
}
return(new EventQueueName(interfaceType, methodName, reference.Properties));
}
private EventQueueName GetKey(object[] eventArgs)
{
bool provideInitializerTokens = CorrelationResolver.IsInitializingMember(this.proxiedType, this.eventName, eventArgs);
ICollection <CorrelationProperty> predicates = CorrelationResolver.ResolveCorrelationValues(this.proxiedType, this.eventName, eventArgs, provideInitializerTokens);
return(new EventQueueName(this.proxiedType, this.eventName, predicates));
}
private static void InitializeFollowers(IServiceProvider context, Type interfaceType, string followermethodName)
{
if (!CorrelationResolver.IsInitializingMember(interfaceType, followermethodName, null))
{
foreach (EventInfo info in interfaceType.GetEvents())
{
CreateFollowerEntry(context, interfaceType, followermethodName, info.Name);
}
}
}
private static void InitializeFollowers(IServiceProvider context, Type interfaceType, string followermethodName)
{
if (CorrelationResolver.IsInitializingMember(interfaceType, followermethodName, null))
{
return;
}
EventInfo[] events = interfaceType.GetEvents();
foreach (EventInfo e in events)
{
CreateFollowerEntry(context, interfaceType, followermethodName, e.Name);
}
}
internal static void UninitializeFollowers(Type interfaceType, string initializer, WorkflowQueue initializerQueue)
{
if (CorrelationResolver.IsInitializingMember(interfaceType, initializer, null))
{
foreach (EventInfo info in interfaceType.GetEvents())
{
string name = info.Name;
if (!CorrelationResolver.IsInitializingMember(interfaceType, info.Name, null))
{
initializerQueue.UnregisterForQueueItemArrived(new FollowerQueueCreator(name));
}
}
}
}
internal static void UninitializeFollowers(Type interfaceType, string initializer, WorkflowQueue initializerQueue)
{
if (!CorrelationResolver.IsInitializingMember(interfaceType, initializer, null))
{
return;
}
EventInfo[] events = interfaceType.GetEvents();
foreach (EventInfo e in events)
{
string follower = e.Name;
if (!CorrelationResolver.IsInitializingMember(interfaceType, e.Name, null))
{
initializerQueue.UnregisterForQueueItemArrived(new FollowerQueueCreator(follower));
}
}
}
protected sealed override void Initialize(IServiceProvider provider)
{
if (provider == null)
{
throw new ArgumentNullException("provider");
}
if ((!base.IsDynamicActivity && !this.IsNestedUnderMultiInstanceContainer) || this.IsInitializingUnderMultiInstanceContainer)
{
Type interfaceType = this.InterfaceType;
string eventName = this.EventName;
IComparable comparable = null;
if (CorrelationResolver.IsInitializingMember(interfaceType, eventName, null))
{
comparable = new EventQueueName(interfaceType, eventName);
}
base.SetValue(QueueNameProperty, comparable);
CorrelationService.Initialize(provider, this, interfaceType, eventName, base.WorkflowInstanceId);
}
}
internal static void InvalidateCorrelationToken(Activity activity, Type interfaceType, string methodName, object[] messageArgs)
{
if (!(CorrelationResolver.GetCorrelationProvider(interfaceType) is NonCorrelatedProvider))
{
CorrelationToken correlationToken = GetCorrelationToken(activity);
ICollection <CorrelationProperty> followerProperties = CorrelationResolver.ResolveCorrelationValues(interfaceType, methodName, messageArgs, false);
if (!CorrelationResolver.IsInitializingMember(interfaceType, methodName, messageArgs))
{
if (!correlationToken.Initialized)
{
throw new InvalidOperationException(SR.GetString("Error_CorrelationNotInitialized", new object[] { correlationToken.Name, activity.QualifiedName }));
}
ValidateCorrelation(correlationToken.Properties, followerProperties, correlationToken.Name, activity);
}
else
{
correlationToken.Initialize(activity, followerProperties);
}
}
}
private static void CreateFollowerEntry(IServiceProvider context, Type interfaceType, string followermethodName, string initializermethodName)
{
if (CorrelationResolver.IsInitializingMember(interfaceType, initializermethodName, null))
{
WorkflowQueuingService service = (WorkflowQueuingService)context.GetService(typeof(WorkflowQueuingService));
FollowerQueueCreator eventListener = new FollowerQueueCreator(followermethodName);
WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Information, 0, "Creating follower {0} on initializer {1}", new object[] { interfaceType.Name + followermethodName, interfaceType.Name + initializermethodName });
ICollection <CorrelationProperty> propertyValues = CorrelationResolver.ResolveCorrelationValues(interfaceType, initializermethodName, null, true);
EventQueueName queueName = new EventQueueName(interfaceType, initializermethodName, propertyValues);
WorkflowQueue workflowQueue = null;
if (service.Exists(queueName))
{
workflowQueue = service.GetWorkflowQueue(queueName);
}
else
{
workflowQueue = service.CreateWorkflowQueue(queueName, true);
workflowQueue.Enabled = false;
}
workflowQueue.RegisterForQueueItemArrived(eventListener);
}
}
protected sealed override void Initialize(IServiceProvider provider)
{
if (provider == null)
{
throw new ArgumentNullException("provider");
}
//When activity is dropped inside multi instance container(replicator)
//We delay CorrelationService initialization to template initialization time.
if ((!this.IsDynamicActivity && !IsNestedUnderMultiInstanceContainer) || IsInitializingUnderMultiInstanceContainer)
{
Type type = this.InterfaceType;
string eventName = this.EventName;
IComparable queueName = null;
if (CorrelationResolver.IsInitializingMember(type, eventName, null))
{
queueName = new EventQueueName(type, eventName);
}
this.SetValue(QueueNameProperty, queueName);
CorrelationService.Initialize(provider, this, type, eventName, this.WorkflowInstanceId);
}
}