Provide users access to license information at runtime

[ramonsmits]

Customer requests access to license information at runtime.

In the customers case it seems they embed NServiceBus and want to present the license data in their UI.

We could expose an actual object representing the license but we could also expose the license blob of the loaded license.

Code

The customer currently is using reflection to access the license info.

private string GetNServiceBusLicenseInfo()
{
  const string nServiceBusCoreAssembyName = "NServiceBus.Core, Version = 5.0.0.0, Culture = neutral, PublicKeyToken = 9fc386479f8a226c";
  var result = "There was an Error obtaining NServiceBus License Information.";
  try
  {
    var licenseManagerType = Type.GetType($"NServiceBus.Licensing.LicenseManager, {nServiceBusCoreAssembyName}");
    var memberInfo = licenseManagerType?.GetField("license", BindingFlags.NonPublic | BindingFlags.Static);
    if (memberInfo != null)
    {
      var info = memberInfo.GetValue(null);
      var licenseType = Type.GetType($"Particular.Licensing.License, {nServiceBusCoreAssembyName}");
      if (licenseType != null)
      {
        var expirationDate = licenseType.GetProperty("ExpirationDate").GetValue(info) as DateTime?;
        var licenseTypeInfo = licenseType.GetProperty("LicenseType").GetValue(info);
        result = $"License Type: {licenseTypeInfo}, Expiration Date: {expirationDate.Value.ToShortDateString()}";
      }
    }
  }
  catch (Exception e)
  {
    _logger.Info(ErrorType.HealthCheckFailed, result, e);
  }
  return result;
}

Reference

https://nservicebus.desk.com/agent/case/17833