Opc.Ua.Com.Server.ComDaGroupManager.RecoverSessionContext C# (CSharp) Method

        public void RecoverSessionContext(ComDaGroup group)
        {
            // create a new subscription and copy existing one.
            Subscription discardSubscription = group.Subscription;
            Subscription subscription = new Subscription();
            subscription.DisplayName = discardSubscription.DisplayName;
            subscription.PublishingInterval = discardSubscription.PublishingInterval;
            subscription.KeepAliveCount = discardSubscription.KeepAliveCount;
            subscription.LifetimeCount = discardSubscription.LifetimeCount;
            subscription.MaxNotificationsPerPublish = discardSubscription.MaxNotificationsPerPublish;
            subscription.Priority = discardSubscription.Priority;
            subscription.PublishingEnabled = discardSubscription.PublishingEnabled;
            subscription.DisableMonitoredItemCache = discardSubscription.DisableMonitoredItemCache;

            try
            {
                discardSubscription.Dispose();
            }
            catch (Exception)
            {
            }

            m_session.AddSubscription(subscription);
            
            try
            {
                // create the initial subscription.
                subscription.Create();

                // set the keep alive interval to 30 seconds and the the lifetime interval to 5 minutes.
                subscription.KeepAliveCount = (uint)((30000 / (int)subscription.CurrentPublishingInterval) + 1);
                subscription.LifetimeCount = (uint)((600000 / (int)subscription.CurrentPublishingInterval) + 1);

                // update the subscription.
                subscription.Modify();
            }
            catch (Exception e)
            {
                m_session.RemoveSubscription(subscription);
                throw ComUtils.CreateComException(e, ResultIds.E_FAIL);
            }

            // update the group.
            group.ActualUpdateRate = (int)(subscription.CurrentPublishingInterval * 2);
            group.Subscription = subscription;
            group.RecreateItems();
        }