The next step was to enumerate The Things Network(TTN) Applications so I could connect only to the required Azure IoT hub(s). There would also be a single configuration setting for the client (establish a connection for every TTN application, or don’t establish a connection for any) and this could be overridden with a TTN application attribute
long pageSize = long.Parse(args[3]);
Console.WriteLine($"Page size: {pageSize}");
Console.WriteLine();
using (HttpClient httpClient = new HttpClient())
{
ApplicationRegistryClient applicationRegistryClient = new ApplicationRegistryClient(baseUrl, httpClient)
{
ApiKey = apiKey
};
try
{
int page = 1;
string[] fieldMaskPathsApplication = { "attributes" }; // think this is the bare minimum required for integration
V3Applications applications = await applicationRegistryClient.ListAsync(collaborator, field_mask_paths: fieldMaskPathsApplication, limit: pageSize, page: page);
while ((applications != null) && (applications.Applications != null))
{
Console.WriteLine($"Applications:{applications.Applications.Count} Page:{page} Page size:{pageSize}");
foreach (V3Application application in applications.Applications)
{
bool applicationIntegration = ApplicationAzureintegrationDefault;
Console.WriteLine($"Application ID:{application.Ids.Application_id}");
if (application.Attributes != null)
{
string ApplicationAzureIntegrationValue = string.Empty;
if (application.Attributes.TryGetValue(ApplicationAzureIntegrationField, out ApplicationAzureIntegrationValue))
{
bool.TryParse(ApplicationAzureIntegrationValue, out applicationIntegration);
}
if (applicationIntegration)
{
Console.WriteLine(" Application attributes");
foreach (KeyValuePair<string, string> attribute in application.Attributes)
{
Console.WriteLine($" Key: {attribute.Key} Value: {attribute.Value}");
}
}
}
Console.WriteLine();
}
page += 1;
applications = await applicationRegistryClient.ListAsync(collaborator, field_mask_paths: fieldMaskPathsApplication, limit: pageSize, page: page);
};
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.WriteLine("Press <enter> to exit");
Console.ReadLine();
}
I Used the field_mask_paths parameter (don’t need created_at, updated_at, name etc.) to minimise the data returned to my client.
public async System.Threading.Tasks.Task<V3Applications> ListAsync(string collaborator_organization_ids_organization_id = null, string collaborator_user_ids_user_id = null, string collaborator_user_ids_email = null, System.Collections.Generic.IEnumerable<string> field_mask_paths = null, string order = null, long? limit = null, long? page = null, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken))
{
var urlBuilder_ = new System.Text.StringBuilder();
urlBuilder_.Append(BaseUrl != null ? BaseUrl.TrimEnd('/') : "").Append("/applications?");
if (collaborator_organization_ids_organization_id != null)
{
urlBuilder_.Append(System.Uri.EscapeDataString("collaborator.organization_ids.organization_id") + "=").Append(System.Uri.EscapeDataString(ConvertToString(collaborator_organization_ids_organization_id, System.Globalization.CultureInfo.InvariantCulture))).Append("&");
}
if (collaborator_user_ids_user_id != null)
{
urlBuilder_.Append(System.Uri.EscapeDataString("collaborator.user_ids.user_id") + "=").Append(System.Uri.EscapeDataString(ConvertToString(collaborator_user_ids_user_id, System.Globalization.CultureInfo.InvariantCulture))).Append("&");
}
if (collaborator_user_ids_email != null)
{
urlBuilder_.Append(System.Uri.EscapeDataString("collaborator.user_ids.email") + "=").Append(System.Uri.EscapeDataString(ConvertToString(collaborator_user_ids_email, System.Globalization.CultureInfo.InvariantCulture))).Append("&");
}
if (field_mask_paths != null)
{
foreach (var item_ in field_mask_paths) { urlBuilder_.Append(System.Uri.EscapeDataString("field_mask.paths") + "=").Append(System.Uri.EscapeDataString(ConvertToString(item_, System.Globalization.CultureInfo.InvariantCulture))).Append("&"); }
}
if (order != null)
{
urlBuilder_.Append(System.Uri.EscapeDataString("order") + "=").Append(System.Uri.EscapeDataString(ConvertToString(order, System.Globalization.CultureInfo.InvariantCulture))).Append("&");
}
if (limit != null)
{
urlBuilder_.Append(System.Uri.EscapeDataString("limit") + "=").Append(System.Uri.EscapeDataString(ConvertToString(limit, System.Globalization.CultureInfo.InvariantCulture))).Append("&");
}
if (page != null)
{
urlBuilder_.Append(System.Uri.EscapeDataString("page") + "=").Append(System.Uri.EscapeDataString(ConvertToString(page, System.Globalization.CultureInfo.InvariantCulture))).Append("&");
}
}
I was hoping that there would be a away to further “shape” the returned data, but in the NSwag generated code the construction of the URL with field_mask_paths, order, limit, and page parameters meant this appears not to be possible.
