public async Task DigitalTwins_DeleteTwinSucceedsIfMatchProvidesCorrectEtag()
{
DigitalTwinsClient client = GetClient();
string roomTwinId = await GetUniqueTwinIdAsync(client, TestAssetDefaults.RoomTwinIdPrefix).ConfigureAwait(false);
string floorModelId = await GetUniqueModelIdAsync(client, TestAssetDefaults.FloorModelIdPrefix).ConfigureAwait(false);
string roomModelId = await GetUniqueModelIdAsync(client, TestAssetDefaults.RoomModelIdPrefix).ConfigureAwait(false);
try
{
// arrange
// create room model
string roomModel = TestAssetsHelper.GetRoomModelPayload(roomModelId, floorModelId);
await CreateAndListModelsAsync(client, new List <string> {
roomModel
}).ConfigureAwait(false);
// act
// create room twin
BasicDigitalTwin roomTwin = TestAssetsHelper.GetRoomTwinPayload(roomModelId);
await client.CreateOrReplaceDigitalTwinAsync <BasicDigitalTwin>(roomTwinId, roomTwin).ConfigureAwait(false);
// update twin
JsonPatchDocument updateTwinPatchDocument = new JsonPatchDocument();
updateTwinPatchDocument.AppendAdd("/Humidity", 30);
updateTwinPatchDocument.AppendReplace("/Temperature", 70);
updateTwinPatchDocument.AppendRemove("/EmployeeId");
await client.UpdateDigitalTwinAsync(roomTwinId, updateTwinPatchDocument, ETag.All).ConfigureAwait(false);
// get twin
ETag?correctETag = (await client.GetDigitalTwinAsync <BasicDigitalTwin>(roomTwinId).ConfigureAwait(false)).Value.ETag;
Assert.IsNotNull(correctETag);
try
{
// since the ETag is not out of date, this call should not throw a 412
await client.DeleteDigitalTwinAsync(roomTwinId, correctETag).ConfigureAwait(false);
}
catch (RequestFailedException ex) when(ex.Status == (int)HttpStatusCode.PreconditionFailed)
{
throw new AssertionException("UpdateRelationship should not have thrown PreconditionFailed because the ETag was up to date", ex);
}
}
catch (Exception ex)
{
Assert.Fail($"Failure in executing a step in the test case: {ex.Message}.");
}
finally
{
// cleanup
try
{
if (!string.IsNullOrWhiteSpace(roomModelId))
{
await client.DeleteModelAsync(roomModelId).ConfigureAwait(false);
}
}
catch (Exception ex)
{
Assert.Fail($"Test clean up failed: {ex.Message}");
}
}
}
public static async Task Main(string[] args)
{
Console.WriteLine("Hello World!");
// Create the Azure Digital Twins client for API calls
string adtInstanceUrl = "https://<your-instance-hostname>";
var credentials = new DefaultAzureCredential();
var client = new DigitalTwinsClient(new Uri(adtInstanceUrl), credentials);
Console.WriteLine($"Service client created – ready to go");
// Upload models
Console.WriteLine($"Upload a model");
string dtdl = File.ReadAllText("<path-to>/Room.json");
var models = new List <string> {
dtdl
};
// Upload the model to the service
await client.CreateModelsAsync(models);
// Create new digital twin
// <CreateTwin_withHelper>
string twinId = "myTwinID";
var initData = new BasicDigitalTwin
{
Id = twinId,
Metadata = { ModelId = "dtmi:example:Room;1" },
// Initialize properties
Contents =
{
{ "Temperature", 25.0 },
{ "Humidity", 50.0 },
},
};
// <CreateTwinCall>
await client.CreateOrReplaceDigitalTwinAsync <BasicDigitalTwin>(twinId, initData);
// </CreateTwinCall>
// </CreateTwin_withHelper>
Console.WriteLine("Twin created successfully");
//Print twin
Console.WriteLine("--- Printing twin details:");
await CustomMethod_FetchAndPrintTwinAsync(twinId, client);
Console.WriteLine("--------");
//Update twin data
var updateTwinData = new JsonPatchDocument();
updateTwinData.AppendAdd("/Temperature", 30.0);
// <UpdateTwinCall>
await client.UpdateDigitalTwinAsync(twinId, updateTwinData);
// </UpdateTwinCall>
Console.WriteLine("Twin properties updated");
Console.WriteLine();
//Print twin again
Console.WriteLine("--- Printing twin details (after update):");
await CustomMethod_FetchAndPrintTwinAsync(twinId, client);
Console.WriteLine("--------");
Console.WriteLine();
//Delete twin
await CustomMethod_DeleteTwinAsync(client, twinId);
}
public async Task DigitalTwins_DeleteTwinFailsIfMatchProvidesOutdatedEtag()
{
DigitalTwinsClient client = GetClient();
string roomTwinId = await GetUniqueTwinIdAsync(client, TestAssetDefaults.RoomTwinIdPrefix).ConfigureAwait(false);
string floorModelId = await GetUniqueModelIdAsync(client, TestAssetDefaults.FloorModelIdPrefix).ConfigureAwait(false);
string roomModelId = await GetUniqueModelIdAsync(client, TestAssetDefaults.RoomModelIdPrefix).ConfigureAwait(false);
try
{
// arrange
// create room model
string roomModel = TestAssetsHelper.GetRoomModelPayload(roomModelId, floorModelId);
await CreateAndListModelsAsync(client, new List <string> {
roomModel
}).ConfigureAwait(false);
// act
// create room twin
BasicDigitalTwin roomTwin = TestAssetsHelper.GetRoomTwinPayload(roomModelId);
await client.CreateOrReplaceDigitalTwinAsync <BasicDigitalTwin>(roomTwinId, roomTwin).ConfigureAwait(false);
// get twin
ETag?etagBeforeUpdate = (await client.GetDigitalTwinAsync <BasicDigitalTwin>(roomTwinId).ConfigureAwait(false)).Value.ETag;
// update twin
JsonPatchDocument updateTwinPatchDocument = new JsonPatchDocument();
updateTwinPatchDocument.AppendAdd("/Humidity", 30);
updateTwinPatchDocument.AppendReplace("/Temperature", 70);
updateTwinPatchDocument.AppendRemove("/EmployeeId");
await client.UpdateDigitalTwinAsync(roomTwinId, updateTwinPatchDocument, ETag.All).ConfigureAwait(false);
// assert
Func <Task> act = async() =>
{
// since the ETag is out of date, this call should throw a 412
await client.DeleteDigitalTwinAsync(roomTwinId, etagBeforeUpdate).ConfigureAwait(false);
};
act.Should().Throw <RequestFailedException>()
.And.Status.Should().Be((int)HttpStatusCode.PreconditionFailed);
}
catch (Exception ex)
{
Assert.Fail($"Failure in executing a step in the test case: {ex.Message}.");
}
finally
{
// cleanup
try
{
if (!string.IsNullOrWhiteSpace(roomModelId))
{
await client.DeleteModelAsync(roomModelId).ConfigureAwait(false);
}
}
catch (Exception ex)
{
Assert.Fail($"Test clean up failed: {ex.Message}");
}
}
}
