/// <summary>
/// List nodes on endpoint
/// </summary>
private static async Task ListNodesAsync(IIoTHubConfig config, ILogger logger,
string deviceId, string moduleId, string endpointUrl, CancellationToken ct)
{
if (string.IsNullOrEmpty(endpointUrl))
{
throw new ArgumentNullException(nameof(endpointUrl));
}
var client = new IoTHubTwinMethodClient(CreateClient(config, logger), logger);
while (!ct.IsCancellationRequested)
{
await Task.Delay(TimeSpan.FromSeconds(5), ct);
try {
var content = new GetNodesRequestModel {
EndpointUrl = endpointUrl
};
var result = await client.CallMethodAsync(deviceId, moduleId,
"GetConfiguredNodesOnEndpoint", JsonConvertEx.SerializeObject(content),
null, ct);
var response = JsonConvertEx.DeserializeObject <GetNodesResponseModel>(result);
logger.Information("Published nodes: {@response}", response);
}
catch (Exception ex) {
logger.Verbose(ex, "Failed to list published nodes.");
}
}
}
/// <summary>
/// Configure publishing of a particular node
/// </summary>
private static async Task PublishNodesAsync(IIoTHubConfig config, ILogger logger,
string deviceId, string moduleId, string endpointUrl, string nodeId,
bool publish, CancellationToken ct)
{
if (string.IsNullOrEmpty(endpointUrl))
{
throw new ArgumentNullException(nameof(endpointUrl));
}
if (string.IsNullOrEmpty(nodeId))
{
throw new ArgumentNullException(nameof(nodeId));
}
var client = new IoTHubTwinMethodClient(CreateClient(config, logger), logger);
while (!ct.IsCancellationRequested)
{
try {
logger.Information("Start publishing {nodeId}...", nodeId);
var content = new PublishNodesRequestModel {
EndpointUrl = endpointUrl,
UseSecurity = true,
OpcNodes = new List <PublisherNodeModel> {
new PublisherNodeModel {
Id = nodeId,
OpcPublishingInterval = 1000,
OpcSamplingInterval = 1000
}
}
};
var result = await client.CallMethodAsync(deviceId, moduleId,
publish? "PublishNodes" : "UnpublishNodes",
JsonConvertEx.SerializeObject(content), null, ct);
logger.Information("... started");
break;
}
catch (Exception ex) {
logger.Verbose(ex, "Failed to configure publishing.");
// Wait a bit
await Task.Delay(TimeSpan.FromSeconds(2), ct);
}
}
}
/// <summary>
/// Ping continously
/// </summary>
private static async Task PingAsync(IIoTHubConfig config, ILogger logger, string deviceId,
string moduleId, CancellationToken ct)
{
var serializer = new NewtonSoftJsonSerializer();
var client = new IoTHubTwinMethodClient(CreateClient(config, logger), logger);
logger.Information("Starting echo thread");
var found = false;
for (var index = 0; !ct.IsCancellationRequested; index++)
{
try {
var message = serializer.SerializePretty(new {
Index = index,
Started = DateTime.UtcNow
});
logger.Debug("Sending ECHO {Index}... ", index);
var result = await client.CallMethodAsync(deviceId, moduleId,
"Echo_V1", message, null, ct);
found = true;
try {
var returned = serializer.Parse(result);
logger.Debug("... received back ECHO {Index} - took {Passed}.",
returned["Index"], DateTime.UtcNow - ((DateTime)returned["Started"]));
}
catch (Exception e) {
logger.Error(e, "Bad result for ECHO {Index}: {result} ",
index, result);
}
}
catch (Exception ex) {
if (!found && (ex is ResourceNotFoundException))
{
logger.Debug("Waiting for module to connect...");
continue; // Initial startup ...
}
logger.Information(ex, "Failed to send ECHO {Index}.", index);
}
}
logger.Information("Echo thread completed");
}
/// <summary>
/// Stop publishing
/// </summary>
private static async Task StopPublishAsync(IIoTHubConfig config, ILogger logger,
string deviceId, string moduleId, CancellationToken ct)
{
var client = new IoTHubTwinMethodClient(CreateClient(config, logger), logger);
while (!ct.IsCancellationRequested)
{
try {
logger.Information("Stop publishing...");
var result = await client.CallMethodAsync(deviceId, moduleId,
"StopPublish_V1", "", null, ct);
logger.Information("... stopped");
break;
}
catch (Exception ex) {
logger.Verbose(ex, "Failed to stop publishing");
}
}
}
