/// <summary>
/// Handles a reconnect event complete from the reconnect handler.
/// </summary>
private void Server_ReconnectComplete(object sender, EventArgs e)
{
try
{
// ignore callbacks from discarded objects.
if (!Object.ReferenceEquals(sender, m_reconnectHandler))
{
return;
}
lock (m_lock)
{
m_session = m_reconnectHandler.Session;
m_reconnectHandler.Dispose();
m_reconnectHandler = null;
foreach (Subscription subscription in m_session.Subscriptions)
{
m_subscription = subscription;
break;
}
if (m_subscription != null)
{
foreach (MonitoredItem monitoredItem in m_subscription.MonitoredItems)
{
Opc.Ua.Server.MonitoredItem localItem = (Opc.Ua.Server.MonitoredItem)monitoredItem.Handle;
if (m_monitoredItems.ContainsKey(localItem.Id))
{
m_monitoredItems[localItem.Id] = monitoredItem;
}
else
{
m_subscription.RemoveItem(monitoredItem);
}
}
m_subscription.ApplyChanges();
}
}
}
catch (Exception exception)
{
Utils.Trace(exception, "Unexpected error doing reconnect.");
}
}
private void BeginReconnect()
{
if (m_subscription != null)
{
foreach (MonitoredItem monitoredItem in m_subscription.MonitoredItems)
{
Opc.Ua.Server.MonitoredItem localItem = (Opc.Ua.Server.MonitoredItem)monitoredItem.Handle;
localItem.QueueValue(null, StatusCodes.BadDeviceFailure);
}
}
if (m_reconnectHandler == null)
{
m_reconnectHandler = new SessionReconnectHandler();
m_reconnectHandler.BeginReconnect(m_session, m_reconnectPeriod * 1000, Server_ReconnectComplete);
}
m_session = null;
m_subscription = null;
}
/// <summary>
/// Handles a datachange notifications.
/// </summary>
private void MonitoredItem_Notification(Subscription subscription, DataChangeNotification notification, IList <string> stringTable)
{
if (!Object.ReferenceEquals(subscription, m_subscription))
{
return;
}
lock (m_lock)
{
for (int ii = 0; ii < notification.MonitoredItems.Count; ii++)
{
MonitoredItem monitoredItem = m_subscription.FindItemByClientHandle(notification.MonitoredItems[ii].ClientHandle);
if (monitoredItem != null)
{
Opc.Ua.Server.MonitoredItem localItem = (Opc.Ua.Server.MonitoredItem)monitoredItem.Handle;
localItem.QueueValue(notification.MonitoredItems[ii].Value, null);
}
}
}
}
