/// <summary>
/// Processes messages received from the server.
/// </summary>
/// <param name="message">Message received from the server.</param>
private void ProcessMessage(string message)
{
XmlDocument document = new XmlDocument();
document.LoadXml(message);
IProcEventData ed = new IProcEventData(document);
switch (ed.Type)
{
case "NodeEventArgs":
{
lock ( nodeEventMessageQueue )
{
nodeEventMessageQueue.Enqueue(ed);
}
break;
}
case "CollectionSyncEventArgs":
case "FileSyncEventArgs":
case "NotifyEventArgs":
{
lock ( syncEventMessageQueue )
{
syncEventMessageQueue.Enqueue(ed);
}
break;
}
}
// Indicate that a message is ready to process.
messageReadyEvent.Set();
}
/// <summary>
/// Thread that indicates node and sync events via registered delegates.
/// </summary>
private void EventThread()
{
// Stay in the loop until the client has been shutdown.
while (state != ClientState.Shutdown)
{
IProcEventData eventData = null;
try
{
// See if there are any sync events to process.
lock ( syncEventMessageQueue )
{
if (syncEventMessageQueue.Count > 0)
{
eventData = syncEventMessageQueue.Dequeue() as IProcEventData;
}
}
if (eventData != null)
{
ProcessEventData(eventData);
}
else
{
// See if there are any node events to process.
lock ( nodeEventMessageQueue )
{
if (nodeEventMessageQueue.Count > 0)
{
eventData = nodeEventMessageQueue.Dequeue() as IProcEventData;
}
}
if (eventData != null)
{
ProcessEventData(eventData);
}
}
}
catch (Exception e)
{
// Don't let the thread terminate because of an exception.
ReportError(new ApplicationException("Error in event thread.", e));
}
// See if there are any message left to process.
if (eventData == null)
{
messageReadyEvent.WaitOne();
messageReadyEvent.Reset();
}
}
}
/// <summary>
/// Processes queued event data messages by calling the delegates registered for the respective events.
/// </summary>
/// <param name="eventData">Event message received from the server.</param>
private void ProcessEventData(IProcEventData eventData)
{
switch (eventData.Type)
{
case "NodeEventArgs":
{
// Get the node arguments from the document.
NodeEventArgs nodeArgs = eventData.ToNodeEventArgs();
// Determine the type of event that occurred.
switch (( EventType )Enum.Parse(typeof(EventType), nodeArgs.EventData))
{
case EventType.NodeChanged:
{
if (onChangedNodeEvent != null)
{
Delegate[] cbList = onChangedNodeEvent.GetInvocationList();
foreach (IProcEventHandler cb in cbList)
{
try
{
cb(nodeArgs);
}
catch (Exception ex)
{
ReportError(new ApplicationException("Removing subscriber because of exception", ex));
onChangedNodeEvent -= cb;
}
}
}
break;
}
case EventType.NodeCreated:
{
if (onCreatedNodeEvent != null)
{
Delegate[] cbList = onCreatedNodeEvent.GetInvocationList();
foreach (IProcEventHandler cb in cbList)
{
try
{
cb(nodeArgs);
}
catch (Exception ex)
{
ReportError(new ApplicationException("Removing subscriber because of exception", ex));
onCreatedNodeEvent -= cb;
}
}
}
break;
}
case EventType.NodeDeleted:
{
if (onDeletedNodeEvent != null)
{
Delegate[] cbList = onDeletedNodeEvent.GetInvocationList();
foreach (IProcEventHandler cb in cbList)
{
try
{
cb(nodeArgs);
}
catch (Exception ex)
{
ReportError(new ApplicationException("Removing subscriber because of exception", ex));
onDeletedNodeEvent -= cb;
}
}
}
break;
}
}
break;
}
case "CollectionSyncEventArgs":
{
if (onCollectionSyncEvent != null)
{
// Get the collection sync arguments from the document.
CollectionSyncEventArgs collectionArgs = eventData.ToCollectionSyncEventArgs();
Delegate[] cbList = onCollectionSyncEvent.GetInvocationList();
foreach (IProcEventHandler cb in cbList)
{
try
{
cb(collectionArgs);
}
catch (Exception ex)
{
ReportError(new ApplicationException("Removing subscriber because of exception", ex));
onCollectionSyncEvent -= cb;
}
}
}
break;
}
case "FileSyncEventArgs":
{
if (onFileSyncEvent != null)
{
// Get the file sync arguments from the document.
FileSyncEventArgs fileArgs = eventData.ToFileSyncEventArgs();
Delegate[] cbList = onFileSyncEvent.GetInvocationList();
foreach (IProcEventHandler cb in cbList)
{
try
{
cb(fileArgs);
}
catch (Exception ex)
{
ReportError(new ApplicationException("Removing subscriber because of exception", ex));
onFileSyncEvent -= cb;
}
}
}
break;
}
case "NotifyEventArgs":
{
if (onNotifyEvent != null)
{
// Get the notify arguments from the document.
NotifyEventArgs notifyArgs = eventData.ToNotifyEventArgs();
Delegate[] cbList = onNotifyEvent.GetInvocationList();
foreach (IProcEventHandler cb in cbList)
{
try
{
cb(notifyArgs);
}
catch (Exception ex)
{
ReportError(new ApplicationException("Removing subscriber because of exception", ex));
onNotifyEvent -= cb;
}
}
}
break;
}
}
}