Opc.Ua.Server.DiagnosticsNodeManager.DoSample C# (CSharp) Method

        private void DoSample(object state)
        {
            try
            {
                lock (Lock)
                {
                    for (int ii = 0; ii < m_sampledItems.Count; ii++)
                    {
                        MonitoredItem monitoredItem = m_sampledItems[ii];

                        // get the handle.
                        NodeHandle handle = monitoredItem.ManagerHandle as NodeHandle;

                        if (handle == null)
                        {
                            continue;
                        }

                        // check if it is time to sample.
                        if (monitoredItem.TimeToNextSample > m_minimumSamplingInterval)
                        {
                            continue;
                        }

                        // read the value.
                        DataValue value = new DataValue();

                        ServiceResult error = handle.Node.ReadAttribute(
                            SystemContext, 
                            monitoredItem.AttributeId,
                            monitoredItem.IndexRange,
                            monitoredItem.DataEncoding,
                            value);

                        if (ServiceResult.IsBad(error))
                        {
                            value = new DataValue(error.StatusCode);
                        }

                        value.ServerTimestamp = DateTime.UtcNow;

                        // queue the value.
                        monitoredItem.QueueValue(value, error);
                    }
                }
            }
            catch (Exception e)
            {
                Utils.Trace(e, "Unexpected error during diagnostics scan.");
            }
        }
        #endregion