public static void Main(string[] args)
{
try
{
if ((args.Length == 0) || string.IsNullOrEmpty(args[0]) || args[0].Equals("localhost", StringComparison.OrdinalIgnoreCase))
{
m_applicationName = Utils.GetHostName();
}
else
{
m_applicationName = args[0];
}
Trace("Publisher is starting up...");
ModuleConfiguration moduleConfiguration = new ModuleConfiguration(m_applicationName);
m_configuration = moduleConfiguration.Configuration;
m_configuration.CertificateValidator.CertificateValidation += new CertificateValidationEventHandler(CertificateValidator_CertificateValidation);
// start our server interface
try
{
Trace("Starting server on endpoint " + m_configuration.ServerConfiguration.BaseAddresses[0].ToString() + "...");
m_server.Start(m_configuration);
Trace("Server started.");
}
catch (Exception ex)
{
Trace("Starting server failed with: " + ex.Message);
}
// check if we also received an owner connection string
string ownerConnectionString = string.Empty;
if ((args.Length > 1) && !string.IsNullOrEmpty(args[1]))
{
ownerConnectionString = args[1];
}
else
{
Trace("IoT Hub owner connection string not passed as argument.");
// check if we have an environment variable to register ourselves with IoT Hub
if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("_HUB_CS")))
{
ownerConnectionString = Environment.GetEnvironmentVariable("_HUB_CS");
}
}
// register ourselves with IoT Hub
if (ownerConnectionString != string.Empty)
{
Trace("Attemping to register ourselves with IoT Hub using owner connection string: " + ownerConnectionString);
RegistryManager manager = RegistryManager.CreateFromConnectionString(ownerConnectionString);
// remove any existing device
Device existingDevice = manager.GetDeviceAsync(m_applicationName).Result;
if (existingDevice != null)
{
manager.RemoveDeviceAsync(m_applicationName).Wait();
}
Device newDevice = manager.AddDeviceAsync(new Device(m_applicationName)).Result;
if (newDevice != null)
{
string hostname = ownerConnectionString.Substring(0, ownerConnectionString.IndexOf(";"));
string deviceConnectionString = hostname + ";DeviceId=" + m_applicationName + ";SharedAccessKey=" + newDevice.Authentication.SymmetricKey.PrimaryKey;
SecureIoTHubToken.Write(m_applicationName, deviceConnectionString);
}
else
{
Trace("Could not register ourselves with IoT Hub using owner connection string: " + ownerConnectionString);
}
}
else
{
Trace("IoT Hub owner connection string not found, registration with IoT Hub abandoned.");
}
// try to read connection string from secure store and open IoTHub client
Trace("Attemping to read connection string from secure store with certificate name: " + m_applicationName);
string connectionString = SecureIoTHubToken.Read(m_applicationName);
if (!string.IsNullOrEmpty(connectionString))
{
Trace("Attemping to configure publisher with connection string: " + connectionString);
m_deviceClient = DeviceClient.CreateFromConnectionString(connectionString, Microsoft.Azure.Devices.Client.TransportType.Mqtt);
m_deviceClient.RetryPolicy = RetryPolicyType.Exponential_Backoff_With_Jitter;
m_deviceClient.OpenAsync().Wait();
}
else
{
Trace("Device connection string not found in secure store.");
}
// get a list of persisted endpoint URLs and create a session for each.
try
{
// check if we have an env variable specifying the published nodes path, otherwise use current directory
string publishedNodesFilePath = Directory.GetCurrentDirectory() + Path.DirectorySeparatorChar + "publishednodes.json";
if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("_GW_PNFP")))
{
publishedNodesFilePath = Environment.GetEnvironmentVariable("_GW_PNFP");
}
Trace("Attemping to load nodes file from: " + publishedNodesFilePath);
m_nodesLookups = JsonConvert.DeserializeObject <PublishedNodesCollection>(File.ReadAllText(publishedNodesFilePath));
Trace("Loaded " + m_nodesLookups.Count.ToString() + " nodes.");
}
catch (Exception ex)
{
Trace("Nodes file loading failed with: " + ex.Message);
}
foreach (NodeLookup nodeLookup in m_nodesLookups)
{
if (!m_endpointUrls.Contains(nodeLookup.EndPointURL))
{
m_endpointUrls.Add(nodeLookup.EndPointURL);
}
}
// connect to the other servers
Trace("Attemping to connect to servers...");
try
{
List <Task> connectionAttempts = new List <Task>();
foreach (Uri endpointUrl in m_endpointUrls)
{
Trace("Connecting to server: " + endpointUrl);
connectionAttempts.Add(EndpointConnect(endpointUrl));
}
// Wait for all sessions to be connected
Task.WaitAll(connectionAttempts.ToArray());
}
catch (Exception ex)
{
Trace("Exception: " + ex.ToString() + "\r\n" + ex.InnerException != null ? ex.InnerException.ToString() : null);
}
// subscribe to preconfigured nodes
Trace("Attemping to subscribe to published nodes...");
if (m_nodesLookups != null)
{
foreach (NodeLookup nodeLookup in m_nodesLookups)
{
try
{
CreateMonitoredItem(nodeLookup);
}
catch (Exception ex)
{
Trace("Unexpected error publishing node: " + ex.Message + "\r\nIgnoring node: " + nodeLookup.EndPointURL.AbsoluteUri + ", " + nodeLookup.NodeID.ToString());
}
}
}
Task dequeueAndSendTask = null;
var tokenSource = new CancellationTokenSource();
var token = tokenSource.Token;
Trace("Creating task to send OPC UA messages in batches to IoT Hub...");
try
{
dequeueAndSendTask = Task.Run(() => DeQueueMessagesAsync(token), token);
}
catch (Exception ex)
{
Trace("Exception: " + ex.ToString());
}
Trace("Publisher is running. Press enter to quit.");
Console.ReadLine();
foreach (Session session in m_sessions)
{
session.Close();
}
//Send cancellation token and wait for last IoT Hub message to be sent.
try
{
tokenSource.Cancel();
dequeueAndSendTask.Wait();
}
catch (Exception ex)
{
Trace("Exception: " + ex.ToString());
}
if (m_deviceClient != null)
{
m_deviceClient.CloseAsync().Wait();
}
}
catch (Exception e)
{
Trace(e, "Unhandled exception in Publisher, exiting!");
}
}
/// <summary>
/// Create module, throws if configuration is bad
/// </summary>
public void Create(Broker broker, byte[] configuration)
{
Trace("Opc.Ua.Publisher.Module: Creating...");
m_broker = broker;
string configString = Encoding.UTF8.GetString(configuration);
// Deserialize from configuration string
ModuleConfiguration moduleConfiguration = null;
try
{
moduleConfiguration = JsonConvert.DeserializeObject <ModuleConfiguration>(configString);
}
catch (Exception ex)
{
Trace("Opc.Ua.Publisher.Module: Module config string " + configString + " could not be deserialized: " + ex.Message);
throw;
}
m_configuration = moduleConfiguration.Configuration;
m_configuration.CertificateValidator.CertificateValidation += new CertificateValidationEventHandler(CertificateValidator_CertificateValidation);
// update log configuration, if available
if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("_GW_LOGP")))
{
m_configuration.TraceConfiguration.OutputFilePath = Environment.GetEnvironmentVariable("_GW_LOGP");
m_configuration.TraceConfiguration.ApplySettings();
}
// get a list of persisted endpoint URLs and create a session for each.
try
{
// check if we have an env variable specifying the published nodes path, otherwise use current directory
string publishedNodesFilePath = Directory.GetCurrentDirectory() + Path.DirectorySeparatorChar + "publishednodes.json";
if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("_GW_PNFP")))
{
publishedNodesFilePath = Environment.GetEnvironmentVariable("_GW_PNFP");
}
Trace("Opc.Ua.Publisher.Module: Attemping to load nodes file from: " + publishedNodesFilePath);
m_nodesLookups = JsonConvert.DeserializeObject <PublishedNodesCollection>(File.ReadAllText(publishedNodesFilePath));
Trace("Opc.Ua.Publisher.Module: Loaded " + m_nodesLookups.Count.ToString() + " nodes.");
}
catch (Exception ex)
{
Trace("Opc.Ua.Publisher.Module: Nodes file loading failed with: " + ex.Message);
}
foreach (NodeLookup nodeLookup in m_nodesLookups)
{
if (!m_endpointUrls.Contains(nodeLookup.EndPointURL))
{
m_endpointUrls.Add(nodeLookup.EndPointURL);
}
}
// start the server
try
{
Trace("Opc.Ua.Publisher.Module: Starting server on endpoint " + m_configuration.ServerConfiguration.BaseAddresses[0].ToString() + "...");
m_server.Start(m_configuration);
Trace("Opc.Ua.Publisher.Module: Server started.");
}
catch (Exception ex)
{
Trace("Opc.Ua.Publisher.Module: Starting server failed with: " + ex.Message);
}
// check if we have an environment variable to register ourselves with IoT Hub
if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("_HUB_CS")))
{
string ownerConnectionString = Environment.GetEnvironmentVariable("_HUB_CS");
if ((m_configuration != null) && (!string.IsNullOrEmpty(m_configuration.ApplicationName)))
{
Trace("Attemping to register ourselves with IoT Hub using owner connection string: " + ownerConnectionString);
string deviceConnectionString = IoTHubRegistration.RegisterDeviceWithIoTHub(m_configuration.ApplicationName, ownerConnectionString);
if (!string.IsNullOrEmpty(deviceConnectionString))
{
SecureIoTHubToken.Write(m_configuration.ApplicationName, deviceConnectionString);
}
else
{
Trace("Could not register ourselves with IoT Hub using owner connection string: " + ownerConnectionString);
}
}
}
// try to configure our publisher component
TryConfigurePublisherAsync().Wait();
// connect to servers
Trace("Opc.Ua.Publisher.Module: Attemping to connect to servers...");
try
{
List <Task> connectionAttempts = new List <Task>();
foreach (Uri endpointUrl in m_endpointUrls)
{
Trace("Opc.Ua.Publisher.Module: Connecting to server: " + endpointUrl);
connectionAttempts.Add(EndpointConnect(endpointUrl));
}
// Wait for all sessions to be connected
Task.WaitAll(connectionAttempts.ToArray());
}
catch (Exception ex)
{
Trace("Opc.Ua.Publisher.Module: Exception: " + ex.ToString() + "\r\n" + ex.InnerException != null ? ex.InnerException.ToString() : null);
}
Trace("Opc.Ua.Publisher.Module: Created.");
}
