public static LogEntry For(CreateMonitoredItemsRequest request)
{
LogEntry entry = new LogEntry("CreateMonitoredItemsRequest");
entry.Add("RequestHeader", For(request.RequestHeader));
entry.Add("SubscriptionID", For(request.SubscriptionId));
entry.Add("TimestampsToReturn", For(request.TimestampsToReturn));
entry.Add("ItemsToCreate", For(request.ItemsToCreate));
return(entry);
}
/// <summary>
/// Receive StateChanged message.
/// </summary>
/// <param name="state">The service's CommunicationState.</param>
public void OnStateChanged(CommunicationState state)
{
if (state == CommunicationState.Opened)
{
Task.Run(async() =>
{
try
{
// create the subscription.
var subscriptionRequest = new CreateSubscriptionRequest
{
RequestedPublishingInterval = this.PublishingInterval,
RequestedMaxKeepAliveCount = this.KeepAliveCount,
RequestedLifetimeCount = Math.Max(this.LifetimeCount, 3 * this.KeepAliveCount),
PublishingEnabled = true,
Priority = this.Priority
};
var subscriptionResponse = await this.Session.CreateSubscriptionAsync(subscriptionRequest).ConfigureAwait(false);
var id = this.Id = subscriptionResponse.SubscriptionId;
// add the items.
if (this.MonitoredItems.Count > 0)
{
var items = this.MonitoredItems.ToList();
var requests = items.Select(m => new MonitoredItemCreateRequest {
ItemToMonitor = new ReadValueId {
NodeId = m.NodeId, AttributeId = m.AttributeId, IndexRange = m.IndexRange
}, MonitoringMode = m.MonitoringMode, RequestedParameters = new MonitoringParameters {
ClientHandle = m.ClientId, DiscardOldest = m.DiscardOldest, QueueSize = m.QueueSize, SamplingInterval = m.SamplingInterval, Filter = m.Filter
}
}).ToArray();
var itemsRequest = new CreateMonitoredItemsRequest
{
SubscriptionId = id,
ItemsToCreate = requests,
};
var itemsResponse = await this.Session.CreateMonitoredItemsAsync(itemsRequest).ConfigureAwait(false);
for (int i = 0; i < itemsResponse.Results.Length; i++)
{
var item = items[i];
var result = itemsResponse.Results[i];
item.OnCreateResult(result);
}
}
}
catch (ServiceResultException ex)
{
Trace.TraceError($"Subscription error creating subscription '{this.GetType().Name}'. {ex.Message}");
}
});
}
}
public async Task CreateMonitoredItemsAsync()
{
var response = new CreateMonitoredItemsResponse();
var request = new CreateMonitoredItemsRequest();
var channel = new TestRequestChannel(response);
var ret = await channel.CreateMonitoredItemsAsync(request);
ret
.Should().BeSameAs(response);
channel.Request
.Should().BeSameAs(request);
}
public async Task AddMonitoredItem()
{
var createItemsRequest = new CreateMonitoredItemsRequest
{
SubscriptionId = subscriptions[0], // Subscription to add to. May need to choose the subscription to add to if multiple subs per client
TimestampsToReturn = TimestampsToReturn.Both,
ItemsToCreate = new MonitoredItemCreateRequest[]
{
new MonitoredItemCreateRequest
{
ItemToMonitor = new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse(_clientOptions.Tag)
},
MonitoringMode = MonitoringMode.Reporting,
RequestedParameters = new MonitoringParameters {
ClientHandle = 42, QueueSize = 2, DiscardOldest = true, SamplingInterval = 1000
},
},
},
};
var createItemResponse = await channel.CreateMonitoredItemsAsync(createItemsRequest);
monitoredItems.Add(createItemResponse.Results[0].MonitoredItemId);
_logger.LogInformation($"Monitored Item added: {monitoredItems[0]}");
tokens.Add(channel
.Where(pr => pr.SubscriptionId == subscriptions[0]) // Subscription to add to. May need to choose the subscription to add to if multiple subs per client
.Subscribe(
pr =>
{
var dcns = pr.NotificationMessage.NotificationData.OfType <DataChangeNotification>();
foreach (var dcn in dcns)
{
foreach (var min in dcn.MonitoredItems)
{
_logger.LogInformation($"sub: {pr.SubscriptionId}; handle: {min.ClientHandle}; value: {min.Value}");
}
}
},
ex => _logger.LogError($"Exception in publish response handler: {ex.GetBaseException().Message}")
));
}
/// <summary>
/// The state machine manages the state of the subscription.
/// </summary>
/// <param name="token">A cancellation token.</param>
/// <returns>A task.</returns>
private async Task StateMachineAsync(CancellationToken token = default)
{
while (!token.IsCancellationRequested)
{
await this.whenSubscribed.Task;
this.progress.Report(CommunicationState.Opening);
try
{
if (this.endpointUrl is null)
{
throw new InvalidOperationException("The endpointUrl field must not be null. Please, use the Subscription attribute properly.");
}
// get a channel.
this.innerChannel = await this.application.GetChannelAsync(this.endpointUrl, token);
try
{
// create the subscription.
var subscriptionRequest = new CreateSubscriptionRequest
{
RequestedPublishingInterval = this.publishingInterval,
RequestedMaxKeepAliveCount = this.keepAliveCount,
RequestedLifetimeCount = Math.Max(this.lifetimeCount, 3 * this.keepAliveCount),
PublishingEnabled = true
};
var subscriptionResponse = await this.innerChannel.CreateSubscriptionAsync(subscriptionRequest).ConfigureAwait(false);
// link up the dataflow blocks
var id = this.subscriptionId = subscriptionResponse.SubscriptionId;
var linkToken = this.innerChannel.LinkTo(this.actionBlock, pr => pr.SubscriptionId == id);
try
{
// create the monitored items.
var items = this.monitoredItems.ToList();
if (items.Count > 0)
{
var requests = items.Select(m => new MonitoredItemCreateRequest {
ItemToMonitor = new ReadValueId {
NodeId = ExpandedNodeId.ToNodeId(m.NodeId, this.InnerChannel.NamespaceUris), AttributeId = m.AttributeId, IndexRange = m.IndexRange
}, MonitoringMode = m.MonitoringMode, RequestedParameters = new MonitoringParameters {
ClientHandle = m.ClientId, DiscardOldest = m.DiscardOldest, QueueSize = m.QueueSize, SamplingInterval = m.SamplingInterval, Filter = m.Filter
}
}).ToArray();
//split requests array to MaxMonitoredItemsPerCall chunks
int maxmonitoreditemspercall = 100;
MonitoredItemCreateRequest[] requests_chunk;
int chunk_size;
for (int i_chunk = 0; i_chunk < requests.Length; i_chunk += maxmonitoreditemspercall)
{
chunk_size = Math.Min(maxmonitoreditemspercall, requests.Length - i_chunk);
requests_chunk = new MonitoredItemCreateRequest[chunk_size];
Array.Copy(requests, i_chunk, requests_chunk, 0, chunk_size);
var itemsRequest = new CreateMonitoredItemsRequest
{
SubscriptionId = id,
ItemsToCreate = requests_chunk,
};
var itemsResponse = await this.innerChannel.CreateMonitoredItemsAsync(itemsRequest);
if (itemsResponse.Results is { } results)
{
for (int i = 0; i < results.Length; i++)
{
var item = items[i];
var result = results[i];
if (result is null)
{
this.logger?.LogError($"Error creating MonitoredItem for {item.NodeId}. The result is null.");
continue;
}
item.OnCreateResult(result);
if (StatusCode.IsBad(result.StatusCode))
{
this.logger?.LogError($"Error creating MonitoredItem for {item.NodeId}. {StatusCodes.GetDefaultMessage(result.StatusCode)}");
}
}
}
}
}
this.progress.Report(CommunicationState.Opened);
// wait here until channel is closing, unsubscribed or token cancelled.
try
{
await Task.WhenAny(
this.WhenChannelClosingAsync(this.innerChannel, token),
this.whenUnsubscribed.Task);
}
catch
{
}
finally
{
this.progress.Report(CommunicationState.Closing);
}
}
catch (Exception ex)
{
this.logger?.LogError($"Error creating MonitoredItems. {ex.Message}");
this.progress.Report(CommunicationState.Faulted);
}
finally
{
linkToken.Dispose();
}
if (this.innerChannel.State == CommunicationState.Opened)
{
try
{
// delete the subscription.
var deleteRequest = new DeleteSubscriptionsRequest
{
SubscriptionIds = new uint[] { id }
};
await this.innerChannel.DeleteSubscriptionsAsync(deleteRequest);
}
catch (Exception ex)
{
this.logger?.LogError($"Error deleting subscription. {ex.Message}");
await Task.Delay(2000);
}
}
this.progress.Report(CommunicationState.Closed);
}
catch (Exception ex)
{
this.logger?.LogError($"Error creating subscription. {ex.Message}");
this.progress.Report(CommunicationState.Faulted);
await Task.Delay(2000);
}
}
catch (Exception ex)
{
this.logger?.LogTrace($"Error getting channel. {ex.Message}");
this.progress.Report(CommunicationState.Faulted);
await Task.Delay(2000);
}
}
}
/// <summary>
/// Initializes the message with the body.
/// </summary>
public CreateMonitoredItemsMessage(CreateMonitoredItemsRequest CreateMonitoredItemsRequest)
{
this.CreateMonitoredItemsRequest = CreateMonitoredItemsRequest;
}
/// <summary>
/// The state machine manages the state of the subscription.
/// </summary>
/// <param name="token">A cancellation token.</param>
/// <returns>A task.</returns>
private async Task StateMachineAsync(CancellationToken token = default(CancellationToken))
{
while (!token.IsCancellationRequested)
{
await this.whenSubscribed.Task;
this.progress.Report(CommunicationState.Opening);
try
{
// get a channel.
this.innerChannel = await this.application.GetChannelAsync(this.endpointUrl, token);
try
{
// create the subscription.
var subscriptionRequest = new CreateSubscriptionRequest
{
RequestedPublishingInterval = this.publishingInterval,
RequestedMaxKeepAliveCount = this.keepAliveCount,
RequestedLifetimeCount = Math.Max(this.lifetimeCount, 3 * this.keepAliveCount),
PublishingEnabled = true
};
var subscriptionResponse = await this.innerChannel.CreateSubscriptionAsync(subscriptionRequest).ConfigureAwait(true);
// link up the dataflow blocks
var id = this.subscriptionId = subscriptionResponse.SubscriptionId;
var linkToken = this.innerChannel.LinkTo(this.actionBlock, pr => pr.SubscriptionId == id);
try
{
// create the monitored items.
var items = this.monitoredItems.ToList();
if (items.Count > 0)
{
var requests = items.Select(m => new MonitoredItemCreateRequest {
ItemToMonitor = new ReadValueId {
NodeId = m.NodeId, AttributeId = m.AttributeId, IndexRange = m.IndexRange
}, MonitoringMode = m.MonitoringMode, RequestedParameters = new MonitoringParameters {
ClientHandle = m.ClientId, DiscardOldest = m.DiscardOldest, QueueSize = m.QueueSize, SamplingInterval = m.SamplingInterval, Filter = m.Filter
}
}).ToArray();
var itemsRequest = new CreateMonitoredItemsRequest
{
SubscriptionId = id,
ItemsToCreate = requests,
};
var itemsResponse = await this.innerChannel.CreateMonitoredItemsAsync(itemsRequest);
for (int i = 0; i < itemsResponse.Results.Length; i++)
{
var item = items[i];
var result = itemsResponse.Results[i];
item.OnCreateResult(result);
if (StatusCode.IsBad(result.StatusCode))
{
this.logger?.LogError($"Error creating MonitoredItem for {item.NodeId}. {StatusCodes.GetDefaultMessage(result.StatusCode)}");
}
}
}
this.progress.Report(CommunicationState.Opened);
// wait here until channel is closing, unsubscribed or token cancelled.
try
{
await Task.WhenAny(
this.WhenChannelClosingAsync(this.innerChannel, token),
this.whenUnsubscribed.Task);
}
catch
{
}
finally
{
this.progress.Report(CommunicationState.Closing);
}
}
catch (Exception ex)
{
this.logger?.LogError($"Error creating MonitoredItems. {ex.Message}");
this.progress.Report(CommunicationState.Faulted);
}
finally
{
linkToken.Dispose();
}
if (this.innerChannel.State == CommunicationState.Opened)
{
try
{
// delete the subscription.
var deleteRequest = new DeleteSubscriptionsRequest
{
SubscriptionIds = new uint[] { id }
};
await this.innerChannel.DeleteSubscriptionsAsync(deleteRequest);
}
catch (Exception ex)
{
this.logger?.LogError($"Error deleting subscription. {ex.Message}");
await Task.Delay(2000);
}
}
this.progress.Report(CommunicationState.Closed);
}
catch (Exception ex)
{
this.logger?.LogError($"Error creating subscription. {ex.Message}");
this.progress.Report(CommunicationState.Faulted);
await Task.Delay(2000);
}
}
catch (Exception ex)
{
this.logger?.LogTrace($"Error getting channel. {ex.Message}");
this.progress.Report(CommunicationState.Faulted);
await Task.Delay(2000);
}
}
}
public async Task TransferSubscription()
{
var channel1 = new UaTcpSessionChannel(
localDescription,
certificateStore,
new UserNameIdentity("root", "secret"),
EndpointUrl,
loggerFactory: loggerFactory);
await channel1.OpenAsync();
logger.LogInformation($"Opened session with endpoint '{channel1.RemoteEndpoint.EndpointUrl}'.");
logger.LogInformation($"SecurityPolicy: '{channel1.RemoteEndpoint.SecurityPolicyUri}'.");
logger.LogInformation($"SecurityMode: '{channel1.RemoteEndpoint.SecurityMode}'.");
logger.LogInformation($"Activated session '{channel1.SessionId}'.");
// create the keep alive subscription.
var subscriptionRequest = new CreateSubscriptionRequest
{
RequestedPublishingInterval = 1000f,
RequestedMaxKeepAliveCount = 30,
RequestedLifetimeCount = 30 * 3,
PublishingEnabled = true,
};
var subscriptionResponse = await channel1.CreateSubscriptionAsync(subscriptionRequest).ConfigureAwait(false);
var id = subscriptionResponse.SubscriptionId;
void onPublish(PublishResponse pr)
{
// loop thru all the data change notifications and log them.
var dcns = pr.NotificationMessage.NotificationData.OfType <DataChangeNotification>();
foreach (var dcn in dcns)
{
foreach (var min in dcn.MonitoredItems)
{
logger.LogInformation($"sub: {pr.SubscriptionId}; handle: {min.ClientHandle}; value: {min.Value}");
}
}
}
void onPublishError(Exception ex)
{
logger.LogInformation("Exception in publish response handler: {0}", ex.GetBaseException().Message);
}
var token = channel1
.Where(pr => pr.SubscriptionId == id)
.Subscribe(onPublish, onPublishError);
var itemsRequest = new CreateMonitoredItemsRequest
{
SubscriptionId = id,
ItemsToCreate = new MonitoredItemCreateRequest[]
{
new MonitoredItemCreateRequest {
ItemToMonitor = new ReadValueId {
NodeId = NodeId.Parse("i=2258"), AttributeId = AttributeIds.Value
}, MonitoringMode = MonitoringMode.Reporting, RequestedParameters = new MonitoringParameters {
ClientHandle = 12345, SamplingInterval = -1, QueueSize = 0, DiscardOldest = true
}
}
},
};
var itemsResponse = await channel1.CreateMonitoredItemsAsync(itemsRequest);
await Task.Delay(3000);
var channel2 = new UaTcpSessionChannel(
localDescription,
certificateStore,
new UserNameIdentity("root", "secret"),
EndpointUrl);
await channel2.OpenAsync();
var token2 = channel2
.Where(pr => pr.SubscriptionId == id)
.Subscribe(onPublish, onPublishError);
var transferRequest = new TransferSubscriptionsRequest
{
SubscriptionIds = new[] { id },
SendInitialValues = true
};
var transferResult = await channel2.TransferSubscriptionsAsync(transferRequest);
StatusCode.IsGood(transferResult.Results[0].StatusCode)
.Should().BeTrue();
logger.LogInformation($"Transfered subscriptions to new client.");
await Task.Delay(3000);
logger.LogInformation($"Closing session '{channel1.SessionId}'.");
await channel1.CloseAsync();
logger.LogInformation($"Closing session '{channel2.SessionId}'.");
await channel2.CloseAsync();
}
/// <summary>
/// Begins an asynchronous invocation of the CreateMonitoredItems service.
/// </summary>
public IAsyncResult BeginCreateMonitoredItems(
RequestHeader requestHeader,
uint subscriptionId,
TimestampsToReturn timestampsToReturn,
MonitoredItemCreateRequestCollection itemsToCreate,
AsyncCallback callback,
object asyncState)
{
CreateMonitoredItemsRequest request = new CreateMonitoredItemsRequest();
request.RequestHeader = requestHeader;
request.SubscriptionId = subscriptionId;
request.TimestampsToReturn = timestampsToReturn;
request.ItemsToCreate = itemsToCreate;
UpdateRequestHeader(request, requestHeader == null, "CreateMonitoredItems");
if (UseTransportChannel)
{
return TransportChannel.BeginSendRequest(request, callback, asyncState);
}
return InnerChannel.BeginCreateMonitoredItems(new CreateMonitoredItemsMessage(request), callback, asyncState);
}
/// <summary>
/// Invokes the CreateMonitoredItems service.
/// </summary>
public virtual ResponseHeader CreateMonitoredItems(
RequestHeader requestHeader,
uint subscriptionId,
TimestampsToReturn timestampsToReturn,
MonitoredItemCreateRequestCollection itemsToCreate,
out MonitoredItemCreateResultCollection results,
out DiagnosticInfoCollection diagnosticInfos)
{
CreateMonitoredItemsRequest request = new CreateMonitoredItemsRequest();
CreateMonitoredItemsResponse response = null;
request.RequestHeader = requestHeader;
request.SubscriptionId = subscriptionId;
request.TimestampsToReturn = timestampsToReturn;
request.ItemsToCreate = itemsToCreate;
UpdateRequestHeader(request, requestHeader == null, "CreateMonitoredItems");
try
{
if (UseTransportChannel)
{
IServiceResponse genericResponse = TransportChannel.SendRequest(request);
if (genericResponse == null)
{
throw new ServiceResultException(StatusCodes.BadUnknownResponse);
}
ValidateResponse(genericResponse.ResponseHeader);
response = (CreateMonitoredItemsResponse)genericResponse;
}
else
{
CreateMonitoredItemsResponseMessage responseMessage = InnerChannel.CreateMonitoredItems(new CreateMonitoredItemsMessage(request));
if (responseMessage == null || responseMessage.CreateMonitoredItemsResponse == null)
{
throw new ServiceResultException(StatusCodes.BadUnknownResponse);
}
response = responseMessage.CreateMonitoredItemsResponse;
ValidateResponse(response.ResponseHeader);
}
results = response.Results;
diagnosticInfos = response.DiagnosticInfos;
}
finally
{
RequestCompleted(request, response, "CreateMonitoredItems");
}
return response.ResponseHeader;
}
private static async Task ConnectAndPublish(CancellationToken token = default)
{
var discoveryUrl = "opc.tcp://localhost:48010"; // UaCppServer - see http://www.unified-automation.com/
var appDescription = new ApplicationDescription()
{
ApplicationName = "MyHomework",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:MyHomework",
ApplicationType = ApplicationType.Client,
};
var certificateStore = new DirectoryStore(
Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "Workstation.ConsoleApp", "pki"));
while (!token.IsCancellationRequested)
{
var channel = new UaTcpSessionChannel(
appDescription,
certificateStore,
new AnonymousIdentity(),
discoveryUrl);
try
{
await channel.OpenAsync();
var subscriptionRequest = new CreateSubscriptionRequest
{
RequestedPublishingInterval = 1000,
RequestedMaxKeepAliveCount = 10,
RequestedLifetimeCount = 30,
PublishingEnabled = true
};
var subscriptionResponse = await channel.CreateSubscriptionAsync(subscriptionRequest);
var id = subscriptionResponse.SubscriptionId;
var itemsToCreate = new MonitoredItemCreateRequest[]
{
new MonitoredItemCreateRequest {
ItemToMonitor = new ReadValueId {
NodeId = NodeId.Parse("i=2258"), AttributeId = AttributeIds.Value
}, MonitoringMode = MonitoringMode.Reporting, RequestedParameters = new MonitoringParameters {
ClientHandle = 12345, SamplingInterval = -1, QueueSize = 0, DiscardOldest = true
}
}
};
var itemsRequest = new CreateMonitoredItemsRequest
{
SubscriptionId = id,
ItemsToCreate = itemsToCreate,
};
var itemsResponse = await channel.CreateMonitoredItemsAsync(itemsRequest);
var subtoken = channel.Where(pr => pr.SubscriptionId == id).Subscribe(
pr =>
{
var dcns = pr.NotificationMessage.NotificationData.OfType <DataChangeNotification>();
foreach (var dcn in dcns)
{
foreach (var min in dcn.MonitoredItems)
{
Console.WriteLine($"sub: {pr.SubscriptionId}; handle: {min.ClientHandle}; value: {min.Value}");
}
}
},
// need to handle error when server closes
ex => { });
try
{
Task.WaitAny(new Task[] { channel.Completion }, token);
}
catch (OperationCanceledException) { }
var request = new DeleteSubscriptionsRequest
{
SubscriptionIds = new uint[] { id }
};
await channel.DeleteSubscriptionsAsync(request);
subtoken.Dispose();
await channel.CloseAsync();
}
catch (Exception ex)
{
Console.WriteLine($"Error connecting and publishing. {ex.Message}");
await channel.AbortAsync();
try
{
await Task.Delay(5000, token);
}
catch (TaskCanceledException) { }
}
}
}
public async Task CreateDataSubscription()
{
// describe this client application.
var clientDescription = new ApplicationDescription
{
ApplicationName = "Workstation.UaClient.FeatureTests",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:Workstation.UaClient.FeatureTests",
ApplicationType = ApplicationType.Client
};
// place to store certificates
var certificateStore = new DirectoryStore("./pki");
// create a 'UaTcpSessionChannel', a client-side channel that opens a 'session' with the server.
var channel = new UaTcpSessionChannel(
clientDescription,
certificateStore,
new AnonymousIdentity(), // the anonymous identity
"opc.tcp://localhost:48010"); // the endpoint of Unified Automation's UaCPPServer.
try
{
// try opening a session and reading a few nodes.
await channel.OpenAsync();
Console.WriteLine($"Opened session with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
Console.WriteLine($"SecurityPolicy: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
Console.WriteLine($"SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
Console.WriteLine($"UserIdentityToken: '{channel.UserIdentity}'.");
// build a CreateSubscriptionRequest. See 'OPC UA Spec Part 4' paragraph 5.13.2
var req = new CreateSubscriptionRequest
{
RequestedPublishingInterval = 1000.0, // intervals are in milliseconds
RequestedMaxKeepAliveCount = 30,
RequestedLifetimeCount = 30 * 3,
PublishingEnabled = true,
};
var res = await channel.CreateSubscriptionAsync(req);
// the result will return the server's subscription id. You will needs this to
// add monitored items.
var id = res.SubscriptionId;
Console.WriteLine($"Created subscription '{id}'.");
// build a CreateMonitoredItemsRequest. See 'OPC UA Spec Part 4' paragraph 5.12.2
var req2 = new CreateMonitoredItemsRequest
{
SubscriptionId = id,
TimestampsToReturn = TimestampsToReturn.Both,
ItemsToCreate = new MonitoredItemCreateRequest[]
{
new MonitoredItemCreateRequest
{
ItemToMonitor = new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse(VariableIds.Server_ServerStatus_CurrentTime)
},
MonitoringMode = MonitoringMode.Reporting,
// specify a unique ClientHandle. The ClientHandle is returned in the PublishResponse
RequestedParameters = new MonitoringParameters {
ClientHandle = 42, QueueSize = 2, DiscardOldest = true, SamplingInterval = 1000.0
},
},
},
};
var res2 = await channel.CreateMonitoredItemsAsync(req2);
Console.WriteLine("\nSubscribe to PublishResponse stream.");
// when the session is open, the client sends a stream of PublishRequests to the server.
// You can subscribe to all the PublishResponses -or- subscribe to the responses from
// a single subscription.
var token = channel
// receive just the subscription we just created
.Where(pr => pr.SubscriptionId == id)
// subscribe with an 'OnNext' function, and an 'OnError' function
.Subscribe(
pr =>
{
// loop thru all the data change notifications and write them out.
var dcns = pr.NotificationMessage.NotificationData.OfType <DataChangeNotification>();
foreach (var dcn in dcns)
{
foreach (var min in dcn.MonitoredItems)
{
Console.WriteLine($"sub: {pr.SubscriptionId}; handle: {min.ClientHandle}; value: {min.Value}");
}
}
},
ex => Console.WriteLine("Exception in publish response handler: {0}", ex.GetBaseException().Message)
);
// publish for 5 seconds and then close.
await Task.Delay(5000);
Console.WriteLine($"\nClosing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
catch (Exception ex)
{
await channel.AbortAsync();
Console.WriteLine(ex.Message);
}
}
public async Task CreateEventSubscription()
{
// describe this client application.
var clientDescription = new ApplicationDescription
{
ApplicationName = "Workstation.UaClient.FeatureTests",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:Workstation.UaClient.FeatureTests",
ApplicationType = ApplicationType.Client
};
// place to store certificates
var certificateStore = new DirectoryStore("./pki");
// create a 'UaTcpSessionChannel', a client-side channel that opens a 'session' with the server.
var channel = new UaTcpSessionChannel(
clientDescription,
certificateStore,
new AnonymousIdentity(), // the anonymous identity
"opc.tcp://localhost:48010"); // the endpoint of Unified Automation's UaCPPServer.
try
{
// try opening a session and reading a few nodes.
await channel.OpenAsync();
Console.WriteLine($"Opened session with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
Console.WriteLine($"SecurityPolicy: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
Console.WriteLine($"SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
Console.WriteLine($"UserIdentityToken: '{channel.UserIdentity}'.");
// build a CreateSubscriptionRequest. See 'OPC UA Spec Part 4' paragraph 5.13.2
var req = new CreateSubscriptionRequest
{
RequestedPublishingInterval = 500.0, // intervals are in milliseconds
RequestedMaxKeepAliveCount = 30,
RequestedLifetimeCount = 30 * 3,
PublishingEnabled = true,
};
var res = await channel.CreateSubscriptionAsync(req);
// the result will return the server's subscription id. You will needs this to
// add monitored items.
var id = res.SubscriptionId;
Console.WriteLine($"Created subscription '{id}'.");
// build a CreateMonitoredItemsRequest. See 'OPC UA Spec Part 4' paragraph 5.12.2
var req2 = new CreateMonitoredItemsRequest
{
SubscriptionId = id,
TimestampsToReturn = TimestampsToReturn.Both,
ItemsToCreate = new MonitoredItemCreateRequest[]
{
new MonitoredItemCreateRequest
{
ItemToMonitor = new ReadValueId {
AttributeId = AttributeIds.EventNotifier, NodeId = NodeId.Parse(ObjectIds.Server)
},
MonitoringMode = MonitoringMode.Reporting,
// specify a unique ClientHandle. The ClientHandle is returned in the PublishResponse
RequestedParameters = new MonitoringParameters {
ClientHandle = 42, SamplingInterval = -1.0, QueueSize = 1000, DiscardOldest = true,
// events require an EventFilter with a SelectClause (a list of fields to receive)
Filter = new EventFilter {
SelectClauses = EventHelper.GetSelectClauses <BaseEvent>()
}
},
},
},
};
var res2 = await channel.CreateMonitoredItemsAsync(req2);
Console.WriteLine("\nSubscribe to PublishResponse stream.");
// when the session is open, the client sends a stream of PublishRequests to the server.
// You can subscribe to all the PublishResponses -or- subscribe to the responses from
// a single subscription.
var token = channel
// receive responses for the subscription we just created
.Where(pr => pr.SubscriptionId == id)
// subscribe with an 'OnNext' function, and an 'OnError' function
.Subscribe(
pr =>
{
// loop thru all the event notifications and write them out.
var enls = pr.NotificationMessage.NotificationData.OfType <EventNotificationList>();
foreach (var enl in enls)
{
foreach (var efl in enl.Events)
{
var ev = EventHelper.Deserialize <BaseEvent>(efl.EventFields);
Console.WriteLine($"time: {ev.Time}, src: {ev.SourceName}, msg: {ev.Message}, sev: {ev.Severity}");
}
}
},
ex => Console.WriteLine("Exception in publish response handler: {0}", ex.GetBaseException().Message)
);
// publish for 5 seconds and then close.
for (int i = 0; i < 10; i++)
{
// trigger an event on the Unified Automation server.
var writeResult = await channel.WriteAsync(
new WriteRequest
{
// Write true, false, true, false, ...
NodesToWrite = new[] {
new WriteValue {
NodeId = NodeId.Parse("ns=2;s=Demo.Events.Trigger_BaseEvent"),
AttributeId = AttributeIds.Value,
Value = new DataValue(i % 2 == 0)
}
}
}
);
await Task.Delay(500);
}
Console.WriteLine($"\nClosing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
catch (Exception ex)
{
await channel.AbortAsync();
Console.WriteLine(ex.Message);
}
}
private static async Task TestAsync()
{
var discoveryUrl = "opc.tcp://*****:*****@"%LOCALAPPDATA%\Workstation.ConsoleApp\pki")),
userIdentity,
remoteEndpoint))
{
try
{
await session.OpenAsync();
}
catch (ServiceResultException ex)
{
if ((uint)ex.HResult == StatusCodes.BadSecurityChecksFailed)
{
Console.WriteLine("Error connecting to endpoint. Did the server reject our certificate?");
}
throw ex;
}
Console.WriteLine("Step 5 - Browse the server namespace.");
Console.WriteLine("+ Root");
BrowseRequest browseRequest = new BrowseRequest
{
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = NodeId.Parse(ObjectIds.RootFolder), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
BrowseResponse browseResponse = await session.BrowseAsync(browseRequest);
foreach (var rd1 in browseResponse.Results[0].References ?? new ReferenceDescription[0])
{
Console.WriteLine(" + {0}: {1}, {2}", rd1.DisplayName, rd1.BrowseName, rd1.NodeClass);
browseRequest = new BrowseRequest
{
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd1.NodeId, session.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await session.BrowseAsync(browseRequest);
foreach (var rd2 in browseResponse.Results[0].References ?? new ReferenceDescription[0])
{
Console.WriteLine(" + {0}: {1}, {2}", rd2.DisplayName, rd2.BrowseName, rd2.NodeClass);
browseRequest = new BrowseRequest
{
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd2.NodeId, session.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await session.BrowseAsync(browseRequest);
foreach (var rd3 in browseResponse.Results[0].References ?? new ReferenceDescription[0])
{
Console.WriteLine(" + {0}: {1}, {2}", rd3.DisplayName, rd3.BrowseName, rd3.NodeClass);
}
}
}
Console.WriteLine("Press any key to continue...");
Console.ReadKey(true);
Console.WriteLine("Step 6 - Create a subscription.");
var subscriptionRequest = new CreateSubscriptionRequest
{
RequestedPublishingInterval = 1000,
RequestedMaxKeepAliveCount = 10,
RequestedLifetimeCount = 30,
PublishingEnabled = true
};
var subscriptionResponse = await session.CreateSubscriptionAsync(subscriptionRequest).ConfigureAwait(false);
var id = subscriptionResponse.SubscriptionId;
Console.WriteLine("Step 7 - Add items to the subscription.");
var itemsToCreate = new MonitoredItemCreateRequest[]
{
new MonitoredItemCreateRequest {
ItemToMonitor = new ReadValueId {
NodeId = NodeId.Parse("i=2258"), AttributeId = AttributeIds.Value
}, MonitoringMode = MonitoringMode.Reporting, RequestedParameters = new MonitoringParameters {
ClientHandle = 12345, SamplingInterval = -1, QueueSize = 0, DiscardOldest = true
}
}
};
var itemsRequest = new CreateMonitoredItemsRequest
{
SubscriptionId = id,
ItemsToCreate = itemsToCreate,
};
var itemsResponse = await session.CreateMonitoredItemsAsync(itemsRequest).ConfigureAwait(false);
Console.WriteLine("Step 8 - Publish the subscription.");
var publishRequest = new PublishRequest
{
SubscriptionAcknowledgements = new SubscriptionAcknowledgement[0]
};
Console.WriteLine("Press any key to delete the subscription...");
while (!Console.KeyAvailable)
{
var publishResponse = await session.PublishAsync(publishRequest).ConfigureAwait(false);
// loop thru all the data change notifications
var dcns = publishResponse.NotificationMessage.NotificationData.OfType <DataChangeNotification>();
foreach (var dcn in dcns)
{
foreach (var min in dcn.MonitoredItems)
{
Console.WriteLine($"clientHandle: {min.ClientHandle}; value: {min.Value}");
}
}
publishRequest = new PublishRequest
{
SubscriptionAcknowledgements = new[] { new SubscriptionAcknowledgement {
SequenceNumber = publishResponse.NotificationMessage.SequenceNumber, SubscriptionId = publishResponse.SubscriptionId
} }
};
}
Console.ReadKey(true);
Console.WriteLine("Step 9 - Delete the subscription.");
var request = new DeleteSubscriptionsRequest
{
SubscriptionIds = new uint[] { id }
};
await session.DeleteSubscriptionsAsync(request).ConfigureAwait(false);
Console.WriteLine("Press any key to close the session...");
Console.ReadKey(true);
Console.WriteLine("Step 10 - Close the session.");
await session.CloseAsync();
}
}
/// <summary>
/// Creates the subscriptions on the server.
/// </summary>
/// <param name="token">A cancellation token. </param>
/// <returns>A task.</returns>
private async Task AutoCreateSubscriptionsAsync(CancellationToken token = default(CancellationToken))
{
var tcs = new TaskCompletionSource <bool>();
NotifyCollectionChangedEventHandler handler = async(o, e) =>
{
if (e.Action == NotifyCollectionChangedAction.Add)
{
foreach (var subscription in e.NewItems.OfType <Subscription>())
{
var target = subscription.Target;
if (target == null)
{
continue;
}
try
{
// create the subscription.
var subscriptionRequest = new CreateSubscriptionRequest
{
RequestedPublishingInterval = subscription.PublishingInterval,
RequestedMaxKeepAliveCount = subscription.KeepAliveCount,
RequestedLifetimeCount = Math.Max(subscription.LifetimeCount, 3 * subscription.KeepAliveCount),
PublishingEnabled = subscription.PublishingEnabled
};
var subscriptionResponse = await this.CreateSubscriptionAsync(subscriptionRequest).ConfigureAwait(false);
var id = subscription.SubscriptionId = subscriptionResponse.SubscriptionId;
// add the items.
if (subscription.MonitoredItems.Count > 0)
{
var items = subscription.MonitoredItems.ToList();
var requests = items.Select(m => new MonitoredItemCreateRequest {
ItemToMonitor = new ReadValueId {
NodeId = m.NodeId, AttributeId = m.AttributeId, IndexRange = m.IndexRange
}, MonitoringMode = m.MonitoringMode, RequestedParameters = new MonitoringParameters {
ClientHandle = m.ClientId, DiscardOldest = m.DiscardOldest, QueueSize = m.QueueSize, SamplingInterval = m.SamplingInterval, Filter = m.Filter
}
}).ToArray();
var itemsRequest = new CreateMonitoredItemsRequest
{
SubscriptionId = id,
ItemsToCreate = requests,
};
var itemsResponse = await this.CreateMonitoredItemsAsync(itemsRequest).ConfigureAwait(false);
for (int i = 0; i < itemsResponse.Results.Length; i++)
{
var item = items[i];
var result = itemsResponse.Results[i];
item.OnCreateResult(target, result);
if (StatusCode.IsBad(result.StatusCode))
{
this.Logger?.LogError($"Error creating MonitoredItem for {item.NodeId}. {StatusCodes.GetDefaultMessage(result.StatusCode)}");
}
}
}
}
catch (ServiceResultException ex)
{
this.Logger?.LogError($"Error creating subscription. {ex.Message}");
this.innerChannel.Fault(ex);
}
}
}
else if (e.Action == NotifyCollectionChangedAction.Remove)
{
try
{
// delete the subscriptions.
var request = new DeleteSubscriptionsRequest
{
SubscriptionIds = e.OldItems.OfType <Subscription>().Select(s => s.SubscriptionId).ToArray()
};
await this.DeleteSubscriptionsAsync(request).ConfigureAwait(false);
}
catch (ServiceResultException ex)
{
this.Logger?.LogError($"Error deleting subscriptions. {ex.Message}");
}
}
};
using (token.Register(state => ((TaskCompletionSource <bool>)state).TrySetResult(true), tcs, false))
{
try
{
handler.Invoke(this.subscriptions, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, this.subscriptions.ToList()));
this.subscriptions.CollectionChanged += handler;
await tcs.Task;
}
finally
{
this.subscriptions.CollectionChanged -= handler;
foreach (var subscription in this.subscriptions)
{
subscription.SubscriptionId = 0;
}
}
}
}
public async Task TestSubscription()
{
var channel = new UaTcpSessionChannel(
localDescription,
certificateStore,
new AnonymousIdentity(),
EndpointUrl,
loggerFactory: loggerFactory);
await channel.OpenAsync();
logger.LogInformation($"Opened session with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
logger.LogInformation($"SecurityPolicy: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
logger.LogInformation($"SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
logger.LogInformation($"Activated session '{channel.SessionId}'.");
var req = new CreateSubscriptionRequest
{
RequestedPublishingInterval = 1000.0,
RequestedMaxKeepAliveCount = 30,
RequestedLifetimeCount = 30 * 3,
PublishingEnabled = true,
};
var res = await channel.CreateSubscriptionAsync(req);
var id = res.SubscriptionId;
logger.LogInformation($"Created subscription '{id}'.");
var req2 = new CreateMonitoredItemsRequest
{
SubscriptionId = id,
TimestampsToReturn = TimestampsToReturn.Both,
ItemsToCreate = new MonitoredItemCreateRequest[]
{
new MonitoredItemCreateRequest
{
ItemToMonitor = new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse(VariableIds.Server_ServerStatus_CurrentTime)
},
MonitoringMode = MonitoringMode.Reporting,
RequestedParameters = new MonitoringParameters {
ClientHandle = 42, QueueSize = 2, DiscardOldest = true, SamplingInterval = 500.0
},
},
},
};
var res2 = await channel.CreateMonitoredItemsAsync(req2);
logger.LogInformation("Subscribe to PublishResponse stream.");
var numOfResponses = 0;
void onPublish(PublishResponse pr)
{
numOfResponses++;
// loop thru all the data change notifications and log them.
var dcns = pr.NotificationMessage.NotificationData.OfType <DataChangeNotification>();
foreach (var dcn in dcns)
{
foreach (var min in dcn.MonitoredItems)
{
logger.LogInformation($"sub: {pr.SubscriptionId}; handle: {min.ClientHandle}; value: {min.Value}");
}
}
}
void onPublishError(Exception ex)
{
logger.LogInformation("Exception in publish response handler: {0}", ex.GetBaseException().Message);
}
var token = channel
.Where(pr => pr.SubscriptionId == id)
.Subscribe(onPublish, onPublishError);
await Task.Delay(5000);
logger.LogInformation($"Closing session '{channel.SessionId}'.");
await channel.CloseAsync();
numOfResponses
.Should().BeGreaterThan(0);
}
public static async Task ReadSubscribed(CancellationToken token = default(CancellationToken))
{
{
// setup logger
var loggerFactory = new LoggerFactory();
loggerFactory.AddConsole(LogLevel.Information);
//var logger = loggerFactory?.CreateLogger<Program>();
// Describe this app.
var appDescription = new ApplicationDescription()
{
ApplicationName = "DataLoggingConsole",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:DataLoggingConsole",
ApplicationType = ApplicationType.Client,
};
// Create a certificate store on disk.
// Create array of NodeIds to log.
while (!token.IsCancellationRequested)
{
try
{
// Discover endpoints.
var getEndpointsRequest = new GetEndpointsRequest
{
EndpointUrl = discoveryUrl,
ProfileUris = new[] { TransportProfileUris.UaTcpTransport }
};
var getEndpointsResponse = await UaTcpDiscoveryService.GetEndpointsAsync(getEndpointsRequest)
.ConfigureAwait(false);
if (getEndpointsResponse.Endpoints == null || getEndpointsResponse.Endpoints.Length == 0)
{
throw new InvalidOperationException($"'{discoveryUrl}' returned no endpoints.");
}
// Choose the endpoint with highest security level.
var remoteEndpoint = getEndpointsResponse.Endpoints.OrderBy(e => e.SecurityLevel).Last();
// Create a session with the server.
var channel = new UaTcpSessionChannel(appDescription, certificateStore,
async e => GetIUserIdentity(remoteEndpoint).GetAwaiter().GetResult(),
remoteEndpoint, loggerFactory);
try
{
await channel.OpenAsync();
var subscriptionRequest = new CreateSubscriptionRequest
{
RequestedPublishingInterval = 1000,
RequestedMaxKeepAliveCount = 10,
RequestedLifetimeCount = 30,
PublishingEnabled = true
};
var subscriptionResponse = await channel.CreateSubscriptionAsync(subscriptionRequest);
var id = subscriptionResponse.SubscriptionId;
var itemsToCreate = new MonitoredItemCreateRequest[]
{
#region MonitoredItems
new MonitoredItemCreateRequest
{
ItemToMonitor = new ReadValueId
{
NodeId = NodeId.Parse("ns=6;s=::Program:Cube.Admin.ProdProcessedCount"), AttributeId = AttributeIds.Value
}, //ProdProcessedCount
MonitoringMode = MonitoringMode.Reporting,
RequestedParameters = new MonitoringParameters
{
ClientHandle = 1, SamplingInterval = -1, QueueSize = 0, DiscardOldest = true
}
},
new MonitoredItemCreateRequest
{
ItemToMonitor = new ReadValueId
{
NodeId = NodeId.Parse("ns=6;s=::Program:Cube.Command.Parameter[0].Value"), AttributeId = AttributeIds.Value
}, //Next batch ID
MonitoringMode = MonitoringMode.Reporting,
RequestedParameters = new MonitoringParameters
{
ClientHandle = 2, SamplingInterval = -1, QueueSize = 0, DiscardOldest = true
}
},
new MonitoredItemCreateRequest
{
ItemToMonitor = new ReadValueId
{
NodeId = NodeId.Parse("ns=6;s=::Program:Cube.Command.Parameter[1].Value"), AttributeId = AttributeIds.Value
}, //Next product ID
MonitoringMode = MonitoringMode.Reporting,
RequestedParameters = new MonitoringParameters
{
ClientHandle = 3, SamplingInterval = -1, QueueSize = 0, DiscardOldest = true
}
},
new MonitoredItemCreateRequest
{
ItemToMonitor = new ReadValueId
{
NodeId = NodeId.Parse("ns=6;s=::Program:Cube.Command.Parameter[2].Value"), AttributeId = AttributeIds.Value
}, //Amount of product in next batch
MonitoringMode = MonitoringMode.Reporting,
RequestedParameters = new MonitoringParameters
{
ClientHandle = 4, SamplingInterval = -1, QueueSize = 0, DiscardOldest = true
}
},
new MonitoredItemCreateRequest
{
ItemToMonitor = new ReadValueId
{
NodeId = NodeId.Parse("ns=6;s=::Program:Cube.Status.Parameter[2].Value"), AttributeId = AttributeIds.Value
}, //Humidity
MonitoringMode = MonitoringMode.Reporting,
RequestedParameters = new MonitoringParameters
{
ClientHandle = 5, SamplingInterval = -1, QueueSize = 0, DiscardOldest = true
}
},
new MonitoredItemCreateRequest
{
ItemToMonitor = new ReadValueId
{
NodeId = NodeId.Parse("ns=6;s=::Program:Cube.Status.Parameter[3].Value"), AttributeId = AttributeIds.Value
}, //Temperature
MonitoringMode = MonitoringMode.Reporting,
RequestedParameters = new MonitoringParameters
{
ClientHandle = 6, SamplingInterval = -1, QueueSize = 0, DiscardOldest = true
}
},
new MonitoredItemCreateRequest
{
ItemToMonitor = new ReadValueId
{
NodeId = NodeId.Parse("ns=6;s=::Program:Cube.Status.Parameter[4].Value"), AttributeId = AttributeIds.Value
}, //Vibration
MonitoringMode = MonitoringMode.Reporting,
RequestedParameters = new MonitoringParameters
{
ClientHandle = 7, SamplingInterval = -1, QueueSize = 0, DiscardOldest = true
}
},
new MonitoredItemCreateRequest
{
ItemToMonitor = new ReadValueId
{
NodeId = NodeId.Parse("ns=6;s=::Program:Cube.Status.MachSpeed"), AttributeId = AttributeIds.Value
}, //MachineSpeed
MonitoringMode = MonitoringMode.Reporting,
RequestedParameters = new MonitoringParameters
{
ClientHandle = 8, SamplingInterval = -1, QueueSize = 0, DiscardOldest = true
}
},
new MonitoredItemCreateRequest
{
ItemToMonitor = new ReadValueId
{
NodeId = NodeId.Parse("ns=6;s=::Program:Cube.Status.StateCurrent"), AttributeId = AttributeIds.Value
}, //state
MonitoringMode = MonitoringMode.Reporting,
RequestedParameters = new MonitoringParameters
{
ClientHandle = 9, SamplingInterval = -1, QueueSize = 0, DiscardOldest = true
}
},
new MonitoredItemCreateRequest
{
ItemToMonitor = new ReadValueId
{
NodeId = NodeId.Parse("ns=6;s=::Program:Cube.Status.StateCurrent"), AttributeId = AttributeIds.Value
}, //cmdCtrln
MonitoringMode = MonitoringMode.Reporting,
RequestedParameters = new MonitoringParameters
{
ClientHandle = 10, SamplingInterval = -1, QueueSize = 0, DiscardOldest = true
}
}
#endregion
};
var itemsRequest = new CreateMonitoredItemsRequest
{
SubscriptionId = id,
ItemsToCreate = itemsToCreate,
};
var itemsResponse = await channel.CreateMonitoredItemsAsync(itemsRequest);
var subToken = channel.Where(pr => pr.SubscriptionId == id).Subscribe(pr =>
{
// loop through all the data change notifications
var dcns = pr.NotificationMessage.NotificationData.OfType <DataChangeNotification>();
foreach (var dcn in dcns)
{
foreach (var min in dcn.MonitoredItems)
{
switch (min.ClientHandle)
{
case 1:
prodProc = (int)min.Value.Value;
time = (DateTime)min.Value.ServerTimestamp;
break;
case 2:
time = (DateTime)min.Value.ServerTimestamp;
nextBatchID = (float)min.Value.Value;
break;
case 3:
time = (DateTime)min.Value.ServerTimestamp;
nextProductID = (float)min.Value.Value;
break;
case 4:
time = (DateTime)min.Value.ServerTimestamp;
nextProductAmount = (float)min.Value.Value;
break;
case 5:
time = (DateTime)min.Value.ServerTimestamp;
humidity = (float)min.Value.Value;
break;
case 6:
time = (DateTime)min.Value.ServerTimestamp;
temperature = (float)min.Value.Value;
break;
case 7:
time = (DateTime)min.Value.ServerTimestamp;
vibration = (float)min.Value.Value;
break;
case 8:
time = (DateTime)min.Value.ServerTimestamp;
machinespeed = (float)min.Value.Value;
break;
case 9:
time = (DateTime)min.Value.ServerTimestamp;
State = (int)min.Value.Value;
break;
case 10:
cmdctrl = (int)min.Value.Value;
time = (DateTime)min.Value.ServerTimestamp;
break;
}
}
}
});
while (!token.IsCancellationRequested)
{
await Task.Delay(500);
}
}
catch
{
}
}
catch (Exception ex)
{
}
//try
//{
// await Task.Delay(cycleTime, token);
//}
//catch
//{
//}
}
}
}
/// <summary>
/// Creates and adds one or more MonitoredItems to a Subscription.
/// </summary>
/// <param name="channel">A instance of <see cref="IRequestChannel"/>.</param>
/// <param name="request">A <see cref="CreateMonitoredItemsRequest"/>.</param>
/// <returns>A <see cref="Task"/> representing the asynchronous operation that returns a <see cref="CreateMonitoredItemsResponse"/>.</returns>
public static async Task <CreateMonitoredItemsResponse> CreateMonitoredItemsAsync(this IRequestChannel channel, CreateMonitoredItemsRequest request)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
return((CreateMonitoredItemsResponse)await channel.RequestAsync(request).ConfigureAwait(false));
}
/// <summary>
/// Creates and adds one or more MonitoredItems to a Subscription.
/// </summary>
/// <param name="channel">A instance of <see cref="IRequestChannel"/>.</param>
/// <param name="request">A <see cref="CreateMonitoredItemsRequest"/>.</param>
/// <returns>A <see cref="Task"/> representing the asynchronous operation that returns a <see cref="CreateMonitoredItemsResponse"/>.</returns>
public static async Task <CreateMonitoredItemsResponse> CreateMonitoredItemsAsync(this IRequestChannel channel, CreateMonitoredItemsRequest request, CancellationToken token = default)
{
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
return((CreateMonitoredItemsResponse)await channel.RequestAsync(request, token).ConfigureAwait(false));
}
public static async Task Run(CancellationToken cancelToken, Action onValueChanged)
{
var clientDescription = new ApplicationDescription {
ApplicationName = "Workstation.UaClient.FeatureTests",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:Workstation.UaClient.FeatureTests",
ApplicationType = ApplicationType.Client
};
var channel = new UaTcpSessionChannel(
clientDescription,
null,
new AnonymousIdentity(),
"opc.tcp://localhost:4840",
SecurityPolicyUris.None
);
try {
await channel.OpenAsync();
// --------------------------------
var res = await channel.CreateSubscriptionAsync(
new CreateSubscriptionRequest {
RequestedPublishingInterval = 1000.0, // ms
RequestedMaxKeepAliveCount = 30,
RequestedLifetimeCount = 30 * 3,
PublishingEnabled = true,
},
cancelToken
);
var id = res.SubscriptionId;
var btnBrowseHandle = (uint)42;
var rq = new CreateMonitoredItemsRequest {
SubscriptionId = id,
TimestampsToReturn = TimestampsToReturn.Both,
ItemsToCreate = new MonitoredItemCreateRequest[] {
new MonitoredItemCreateRequest {
ItemToMonitor = new ReadValueId {
NodeId = NodeId.Parse("ns=6;s=::AsGlobalPV:dbgBtnBrowsePrograms"),
AttributeId = AttributeIds.Value
},
MonitoringMode = MonitoringMode.Reporting,
// Specify a unique ClientHandle,
// which will be returned in the PublishResponse.
RequestedParameters = new MonitoringParameters {
ClientHandle = btnBrowseHandle, QueueSize = 2, DiscardOldest = true, SamplingInterval = 1000.0
},
},
},
};
var res2 = await channel.CreateMonitoredItemsAsync(rq);
var isInError = false;
var token = channel
// While session is open, the client sends a stream of PublishRequests to the server.
// You can subscribe to all the PublishResponses.
.Where(response => response.SubscriptionId == id)
.Subscribe(
onNext: response => {
var notifications = response.NotificationMessage.NotificationData.OfType <DataChangeNotification>();
foreach (var notification in notifications)
{
foreach (var item in notification.MonitoredItems)
{
if (item.ClientHandle == btnBrowseHandle)
{
if ((bool)item.Value.Value)
{
onValueChanged();
}
}
}
}
},
onError: ex => {
isInError = true;
}
);
while (!cancelToken.IsCancellationRequested && !isInError)
{
await Task.Delay(500);
}
await channel.CloseAsync();
}
catch (Exception ex) {
await channel.AbortAsync();
Console.WriteLine(ex.Message);
}
}
private static async Task TestAsync()
{
var loggerFactory = new LoggerFactory();
loggerFactory.AddDebug(LogLevel.Trace);
var discoveryUrl = "opc.tcp://localhost:26543"; // Workstation.NodeServer
//var discoveryUrl = "opc.tcp://localhost:48010"; // UaCppServer - see http://www.unified-automation.com/
//var discoveryUrl = "opc.tcp://localhost:16664"; // open62541
Console.WriteLine("Step 1 - Describe this app.");
var appDescription = new ApplicationDescription()
{
ApplicationName = "MyHomework",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:MyHomework",
ApplicationType = ApplicationType.Client,
};
Console.WriteLine("Step 2 - Create a certificate store.");
var certificateStore = new DirectoryStore(
Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "Workstation.ConsoleApp", "pki"));
Console.WriteLine("Step 3 - Create a session with your server.");
var channel = new UaTcpSessionChannel(
appDescription,
certificateStore,
ShowSignInDialog,
discoveryUrl,
loggerFactory: loggerFactory);
try
{
await channel.OpenAsync();
Console.WriteLine($" Opened channel with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
Console.WriteLine($" SecurityPolicyUri: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
Console.WriteLine($" SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
Console.WriteLine($" UserIdentity: '{channel.UserIdentity}'.");
Console.WriteLine("Press any key to continue...");
Console.ReadKey(true);
Console.WriteLine("Step 4 - Browse the server namespace.");
Console.WriteLine("+ Root");
BrowseRequest browseRequest = new BrowseRequest
{
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = NodeId.Parse(ObjectIds.RootFolder), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
BrowseResponse browseResponse = await channel.BrowseAsync(browseRequest);
foreach (var rd1 in browseResponse.Results[0].References ?? new ReferenceDescription[0])
{
Console.WriteLine(" + {0}: {1}, {2}", rd1.DisplayName, rd1.BrowseName, rd1.NodeClass);
browseRequest = new BrowseRequest
{
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd1.NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
foreach (var rd2 in browseResponse.Results[0].References ?? new ReferenceDescription[0])
{
Console.WriteLine(" + {0}: {1}, {2}", rd2.DisplayName, rd2.BrowseName, rd2.NodeClass);
browseRequest = new BrowseRequest
{
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd2.NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
foreach (var rd3 in browseResponse.Results[0].References ?? new ReferenceDescription[0])
{
Console.WriteLine(" + {0}: {1}, {2}", rd3.DisplayName, rd3.BrowseName, rd3.NodeClass);
}
}
}
Console.WriteLine("Press any key to continue...");
Console.ReadKey(true);
Console.WriteLine("Step 5 - Create a subscription.");
var subscriptionRequest = new CreateSubscriptionRequest
{
RequestedPublishingInterval = 1000,
RequestedMaxKeepAliveCount = 10,
RequestedLifetimeCount = 30,
PublishingEnabled = true
};
var subscriptionResponse = await channel.CreateSubscriptionAsync(subscriptionRequest);
var id = subscriptionResponse.SubscriptionId;
Console.WriteLine("Step 6 - Add items to the subscription.");
var itemsToCreate = new MonitoredItemCreateRequest[]
{
new MonitoredItemCreateRequest {
ItemToMonitor = new ReadValueId {
NodeId = NodeId.Parse("i=2258"), AttributeId = AttributeIds.Value
}, MonitoringMode = MonitoringMode.Reporting, RequestedParameters = new MonitoringParameters {
ClientHandle = 12345, SamplingInterval = -1, QueueSize = 0, DiscardOldest = true
}
}
};
var itemsRequest = new CreateMonitoredItemsRequest
{
SubscriptionId = id,
ItemsToCreate = itemsToCreate,
};
var itemsResponse = await channel.CreateMonitoredItemsAsync(itemsRequest);
Console.WriteLine("Step 7 - Subscribe to PublishResponse stream.");
var token = channel.Where(pr => pr.SubscriptionId == id).Subscribe(pr =>
{
// loop thru all the data change notifications
var dcns = pr.NotificationMessage.NotificationData.OfType <DataChangeNotification>();
foreach (var dcn in dcns)
{
foreach (var min in dcn.MonitoredItems)
{
Console.WriteLine($"sub: {pr.SubscriptionId}; handle: {min.ClientHandle}; value: {min.Value}");
}
}
});
Console.WriteLine("Press any key to delete the subscription...");
while (!Console.KeyAvailable)
{
await Task.Delay(500);
}
Console.ReadKey(true);
Console.WriteLine("Step 8 - Delete the subscription.");
var request = new DeleteSubscriptionsRequest
{
SubscriptionIds = new uint[] { id }
};
await channel.DeleteSubscriptionsAsync(request);
token.Dispose();
Console.WriteLine("Press any key to close the session...");
Console.ReadKey(true);
Console.WriteLine("Step 9 - Close the session.");
await channel.CloseAsync();
}
catch (ServiceResultException ex)
{
if ((uint)ex.HResult == StatusCodes.BadSecurityChecksFailed)
{
Console.WriteLine("Error connecting to endpoint. Did the server reject our certificate?");
}
await channel.AbortAsync();
throw;
}
}
