/// <summary>
/// RabitManager constructor. Creates the manager's thread.
/// If the user has derived their own Workspace from the RabitWorkspace,
/// it must be provided when the manager is constructed... otherwise
/// the standard RabitWorkspace will be used.
/// </summary>
public RabitManager()
{
//Generate the Manager Name for use in tracking error messages.
//and setting up queue names.
managerName = this.GetType().ToString();
int idx = managerName.LastIndexOf('.');
managerName = managerName.Substring(idx + 1);
managerThread = new Thread(new ThreadStart(managerMain));
managerThread.Name = managerName;
shutdownManager = false;
MgrStatus = new ManagerStatusMessage();
//Add all publish subscribe messages this manager relies on to the
//global workspace here
string mgrStatusMsgName = string.Concat(ManagerName, "Status");
AddPublishSubscribeMessage(mgrStatusMsgName, MgrStatus);
MgrControl = new ManagerControlMessage();
AddPublishSubscribeMessage("ManagerControl", MgrControl);
//string mgrMsgQueueName = string.Concat(ManagerName, "MessageQueue");
MgrMessageQueue = new RabitMessageQueue(100, ManagerName);
//Add the Message Queue to the Global Workspace
AddManagerMessageQueue(ManagerName, MgrMessageQueue);
//Setup Event Handling
ewhWaitHandle = new EventWaitHandle(false, EventResetMode.AutoReset);
wakeupManagerEvent = new PublishSubscribeMessChangedHandler(wakeUpManagerEH);
}
/// <summary>
/// A manager can register a message queue pick up event if the manager
/// needs to know when a message has been picked up by the receiving queue.
/// Registering events should be done in the Manager's startup code.
/// </summary>
/// <param name="queueName"></param>
/// <param name="delegateFunction"></param>
/// <returns></returns>
public bool RegisterMsgPickedUpEvent(string queueName, PublishSubscribeMessChangedHandler delegateFunction)
{
bool error = true;
RabitMessageQueue msgQueue = null;
if (messageQueueDict.TryGetValue(queueName, out msgQueue))
{
msgQueue.RegisterMsgPickedUpEvent(delegateFunction);
error = false;
}
return(error);
}
/// <summary>
/// Add a message to a Manager's Message Queue.
/// It is assumed the manager added the Message Queue when it
/// was initialized.
/// </summary>
/// <param name="queueName"></param>
/// <param name="msg"></param>
/// <returns>true if error... not message queue, false otherwise</returns>
public bool AddMessageToQueue(string queueName, Object msg)
{
bool error = true;
//As long as the messageQueuesDict is not being changed
//after the Manager's first initialize... it is safe to
//obtain the message queue without getting a lock.
RabitMessageQueue msgQueue = null;
if (messageQueueDict.TryGetValue(queueName, out msgQueue))
{
msgQueue.addMessage(msg);
error = false;
}
return(error);
}
/// <summary>
/// Get a reference to the Global Publish Subscribe Message... this is
/// normally used to get the reference used by the Message.
/// </summary>
/// <param name="messageName"></param>
/// <returns></returns>
//public PublishSubscribeMessage GetPublishSubscribeMessageRef(string messageName)
//{
// PublishSubscribeMessage psMsgRef = null;
// //rwlPublishSubscribeDict.EnterReadLock();
// if( publishSubcribeMsgDict.ContainsKey(messageName ) )
// {
// psMsgRef = publishSubcribeMsgDict[messageName].PSMsg;
// }
// //rwlPublishSubscribeDict.ExitReadLock();
// return psMsgRef;
//}
/// <summary>
/// Add a thread-safe message queue to the Global WorkSpace.
/// Managers that are on the recieving end of the Queue should add the
/// message queue to the global workspace. Other managers may obtain
/// references to the message queue or add messages to the queue at run
/// time.
/// </summary>
/// <param name="msgQueue"></param>
/// <returns></returns>
public void AddManagerMessageQueue(string queueName, RabitMessageQueue msgQueue)
{
//rwlMessageQueueDict.EnterWriteLock();
messageQueueDict[queueName] = msgQueue;
//rwlMessageQueueDict.ExitWriteLock();
}
/// <summary>
/// Add a thread-safe message queue to the Global WorkSpace.
/// Managers that are on the recieving end of the Queue should add the
/// message queue to the global workspace. Other managers may obtain
/// references to the message queue or add messages to the queue at run
/// time.
/// </summary>
/// <param name="msgQueue"></param>
/// <returns></returns>
public void AddManagerMessageQueue(string queueName, RabitMessageQueue msgQueue)
{
RabitWorkspace.GetWorkspace().AddManagerMessageQueue(queueName, msgQueue);
}
