public Delegate PublishToDelegate(string eventId, IStateObject source)
{
eventId = eventId.ToUpper();
var promisesInfo = HasSubscribers(eventId, source) as PromisesInfo;
if (promisesInfo != null)
{
foreach (string eventsnameid in promisesInfo.GetListMethodsMame())
{
var subscriptionId = UniqueIDGenerator.GetEventRelativeUniqueID(source, eventsnameid);
var eventHandlerInfo = _stateManager.GetObject(subscriptionId) as EventPromiseInfo;
if (eventHandlerInfo != null)
{
var result = this.PublishInternal(eventHandlerInfo, eventId, source, true, null);
return(result);
}
else
{
TraceUtil.TraceError(string.Format("EventAggregator::PublishToMainSyncronizationContext. No Events found for EventId [{0}] on object [{1}]", subscriptionId, source == null ? "null" : source.UniqueID));
}
}
}
else
{
TraceUtil.TraceError(string.Format("HandlersEventAggregator::PublishToMainSyncronizationContext. No Events found for EventId [{0}] on object [{1}]", eventId, source == null ? "null" : source.UniqueID));
}
return(null);
}
/// <summary>
/// Will register a subscriber. Event will be recognized by "eventId" and will be attached to
/// obj
/// </summary>
/// <param name="eventId"></param>
/// <param name="obj"></param>
/// <param name="handler"></param>
public void Subscribe(string eventId, IStateObject obj, Delegate handler, out string eventSubscriptionId, bool isDynamic = false)
{
var result = String.Empty;
if (handler != null)
{
//get/created subscribed promises info
eventId = eventId.ToUpper();
var handlerSubscriptionId = UniqueIDGenerator.GetEventRelativeUniqueID(obj, eventId);
LazyBehaviours.AddDependent(obj, UniqueIDGenerator.EVENTPrefix + eventId);
var promisesInfo = PromisesInfo.CreateInstance(handlerSubscriptionId);
////subscribe handler
var eventMethodName = handler.Method.Name.ToUpper() + eventId;
eventSubscriptionId = UniqueIDGenerator.GetEventRelativeUniqueID(obj, eventMethodName);
LazyBehaviours.AddDependent(obj, UniqueIDGenerator.EVENTPrefix + eventMethodName);
promisesInfo.Add(eventMethodName);
if (isDynamic)
{
EventPromiseInfoForClient.CreateEventInstance(_stateManager, handler, obj, eventSubscriptionId, actionID: eventId);
}
else
{
EventPromiseInfo.CreateEventInstance(_stateManager, handler, obj, eventSubscriptionId);
}
#if DEBUG
Debug.Assert(_stateManager.GetObject(eventSubscriptionId) != null, "Event Subscription Failed", "Event for {0} on Object {1} failed", eventId, obj.UniqueID);
#endif
result = eventSubscriptionId;
}
eventSubscriptionId = result;
}
private void PublishInternal(string eventId, IStateObject source, object[] args)
{
eventId = eventId.ToUpper();
var promisesInfo = HasSubscribers(eventId, source) as PromisesInfo;
if (promisesInfo != null)
{
foreach (string eventsnameid in promisesInfo.GetListMethodsMame())
{
var subscriptionId = UniqueIDGenerator.GetEventRelativeUniqueID(source, eventsnameid);
var eventHandlerInfo = _stateManager.GetObject(subscriptionId) as EventPromiseInfo;
if (eventHandlerInfo != null)
{
this.PublishInternal(eventHandlerInfo, eventId, source, false, args);
}
else
{
TraceUtil.TraceError(string.Format("EventAggregator::PublishInternal. No Events found for EventId [{0}] on object [{1}]", subscriptionId, source == null ? "null" : source.UniqueID));
}
}
}
else
{
TraceUtil.TraceError(string.Format("HandlersEventAggregator::PublishInternal. No Events found for EventId [{0}] on object [{1}]", eventId, source == null ? "null" : source.UniqueID));
}
}
public IStateObject HasSubscribers(string eventId, IStateObject source)
{
eventId = eventId.ToUpper();
if (source == null)
{
TraceUtil.TraceError("EventAggregator::PublishHighPriorityEvent Error publishing event [" + eventId + "] source argument should not be null");
return(null);
}
var subscriptionId = UniqueIDGenerator.GetEventRelativeUniqueID(source, eventId);
var promisesInfo = _stateManager.GetObject(subscriptionId) as PromisesInfo;
return(promisesInfo);
}
public void UnSubscribe(string eventId, IStateObject source, string methodName)
{
eventId = eventId.ToUpper();
var promisesInfo = HasSubscribers(eventId, source) as PromisesInfo;
if (promisesInfo != null)
{
methodName = methodName.ToUpper();
promisesInfo.Remove(methodName);
var eventSubscriptionId = UniqueIDGenerator.GetEventRelativeUniqueID(source, methodName + eventId);
_stateManager.RemoveObject(eventSubscriptionId, true);
if (promisesInfo.IsEmpty())
{
eventSubscriptionId = UniqueIDGenerator.GetEventRelativeUniqueID(source, eventId);
_stateManager.RemoveObject(eventSubscriptionId, true);
}
}
}