Opc.Ua.Server.SubscriptionManager.ModifySubscription C# (CSharp) Method

		public void ModifySubscription(
            OperationContext context,
            uint             subscriptionId,
            double           requestedPublishingInterval,
            uint             requestedLifetimeCount,
            uint             requestedMaxKeepAliveCount,
            uint             maxNotificationsPerPublish,
            byte             priority,
            out double       revisedPublishingInterval,
            out uint         revisedLifetimeCount,
            out uint         revisedMaxKeepAliveCount)
        {
            revisedPublishingInterval = requestedPublishingInterval;
            revisedLifetimeCount      = requestedLifetimeCount;
            revisedMaxKeepAliveCount  = requestedMaxKeepAliveCount;
            
            uint publishingIntervalCount = 0;

            // find subscription.
            Subscription subscription = null;

            lock (m_lock)
            {
                if (!m_subscriptions.TryGetValue(subscriptionId, out subscription))
                {
                    throw new ServiceResultException(StatusCodes.BadSubscriptionIdInvalid);
                }
            }

            double publishingInterval = subscription.PublishingInterval;

            // calculate publishing interval.
            revisedPublishingInterval = CalculatePublishingInterval(requestedPublishingInterval);

            // calculate the keep alive count.
            revisedMaxKeepAliveCount = CalculateKeepAliveCount(revisedPublishingInterval, requestedMaxKeepAliveCount);
            
            // calculate the lifetime count.
            revisedLifetimeCount = CalculateLifetimeCount(revisedPublishingInterval, revisedMaxKeepAliveCount, requestedLifetimeCount);

            // calculate the max notification count.
            maxNotificationsPerPublish = CalculateMaxNotificationsPerPublish(maxNotificationsPerPublish);

            // update the subscription.
            subscription.Modify(
                context,
                revisedPublishingInterval,
                revisedLifetimeCount,
                revisedMaxKeepAliveCount,
                maxNotificationsPerPublish,
                priority);

            // get the count for the diagnostics.
            publishingIntervalCount = GetPublishingIntervalCount();

            lock (m_server.DiagnosticsLock)
            {
                ServerDiagnosticsSummaryDataType diagnostics = m_server.ServerDiagnostics;
                diagnostics.PublishingIntervalCount = publishingIntervalCount;
            }
        }