public void Subscribe(IExchange exchange, string queueName, HandlerManager queueHandlerManager)
{
//Loop through request and entity types adding queueMessageHandlers to our internal _handlerManager
foreach (Type requestType in EntityTypes.EntityRequestAndResponseTypes)
{
foreach (Type entityType in EntityTypes.EntityBaseTypes)
{
var requestWithEntityType = requestType.MakeGenericType(entityType);
var queueMessageHandlerType = typeof(QueueMessageHandler <>).MakeGenericType(requestWithEntityType);
var queueMessageHandlerList = GenericHelpers.InvokeGenericMethod(queueHandlerManager, requestWithEntityType, typeof(IList), "GetHandlersForType", queueName);
var list = queueMessageHandlerList as IList;
if (list != null && list.Count > 0)
{
foreach (var item in list)
{
GenericHelpers.InvokeGenericMethod(_handlerManager, requestWithEntityType, typeof(void), "AddHandler", new object[] { item });
}
}
}
}
//Call subscribe internal
SubscribeInternal(exchange, queueName);
}
private IHandlerRegistration AddHandlers(IHandlerRegistration handlerReg, IQueue queue)
{
//This is gonna be a bit NASTY
//For this queue we need to find all the types we're currently holding handlers for
//then add the internal onMessageReceived handler for each type
//The reason for all this is calling consume on a queue with existing handlers for types
//wipes them out and we have to add all type handlers again - so each time a type is added to be subscribed to
//the whole previous set need to be re-added
foreach (Type requestType in EntityTypes.EntityRequestAndResponseTypes)
{
foreach (Type entityType in EntityTypes.EntityBaseTypes)
{
var requestWithEntityType = requestType.MakeGenericType(entityType);
var queueMessageHandlerType = typeof(QueueMessageHandler <>).MakeGenericType(requestWithEntityType);
var queueMessageHandlerList = GenericHelpers.InvokeGenericMethod(_handlerManager, requestWithEntityType, typeof(IList), "GetHandlersForType", queue.Name);
var list = queueMessageHandlerList as IList;
if (list != null && list.Count > 0)
{
var messageType = typeof(IMessage <>).MakeGenericType(requestWithEntityType);
var addParamType = typeof(Action <,>).MakeGenericType(messageType, typeof(MessageReceivedInfo));
var addMethod = GenericHelpers.GetMethodExt(handlerReg.GetType(), "Add", handlerReg.GetType(), addParamType);
var addMethodTyped = addMethod.MakeGenericMethod(requestWithEntityType);
var onMessageMethod = GenericHelpers.GetMethodExt(this.GetType(), "OnMessageReceived", typeof(void), new Type[] { messageType, typeof(MessageReceivedInfo) });
var onMessageMethodTyped = onMessageMethod.MakeGenericMethod(requestWithEntityType);
var action = Delegate.CreateDelegate(addParamType, this, onMessageMethodTyped);
handlerReg = (IHandlerRegistration)addMethodTyped.Invoke(handlerReg, new object[] { action });
}
}
}
return(handlerReg);
}
