/// <summary>
/// Publishes a single Nodelookup
/// </summary>
private ServiceResult DoPublish(NodeLookup lookup)
{
try
{
// find the right session using our lookup
Session matchingSession = null;
foreach (Session session in Program.m_sessions)
{
char[] trimChars = { '/', ' ' };
if (session.Endpoint.EndpointUrl.TrimEnd(trimChars).StartsWith(lookup.EndPointURL.ToString().TrimEnd(trimChars), StringComparison.OrdinalIgnoreCase))
{
lookup.EndPointURL = new Uri(session.Endpoint.EndpointUrl);
matchingSession = session;
break;
}
}
if (matchingSession == null)
{
Program.Trace("PublishNodeMethod: No matching session found for " + lookup.EndPointURL.ToString());
return(ServiceResult.Create(StatusCodes.BadSessionIdInvalid, "Session for published node not found!"));
}
Program.Trace("PublishNodeMethod: Session found.");
// check if the node has already been published
foreach (MonitoredItem item in matchingSession.DefaultSubscription.MonitoredItems)
{
if (item.StartNodeId == lookup.NodeID)
{
Program.Trace("PublishNodeMethod: Node ID has already been published " + lookup.NodeID.ToString());
return(ServiceResult.Create(StatusCodes.BadNodeIdExists, "Node has already been published!"));
}
}
// subscribe to the node
Program.CreateMonitoredItem(lookup);
Program.Trace("PublishNodeMethod: Monitored item created.");
// update our data
Program.m_nodesLookups.Add(lookup);
if (!Program.m_endpointUrls.Contains(lookup.EndPointURL))
{
Program.m_endpointUrls.Add(lookup.EndPointURL);
}
//serialize Program.m_nodesLookups to disk
string publishedNodesFilePath = Directory.GetCurrentDirectory() + Path.DirectorySeparatorChar + "publishednodes.json";
if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("_GW_PNFP")))
{
publishedNodesFilePath = Environment.GetEnvironmentVariable("_GW_PNFP");
}
File.WriteAllText(publishedNodesFilePath, JsonConvert.SerializeObject(Program.m_nodesLookups));
Program.Trace("PublishNodeMethod: Successful publish: " + lookup.ToString());
return(ServiceResult.Good);
}
catch (Exception ex)
{
Program.Trace("PublishNodeMethod: Exception: " + ex.ToString());
return(ServiceResult.Create(ex, StatusCodes.BadUnexpectedError, "Unexpected error publishing node: " + ex.Message));
}
}