|
public static Create ( ApplicationConfiguration configuration, ConfiguredEndpoint endpoint, bool updateBeforeConnect, bool checkDomain, string sessionName, uint sessionTimeout, IUserIdentity identity, IList |
||
| configuration | ApplicationConfiguration | The configuration for the client application. |
| endpoint | ConfiguredEndpoint | The endpoint for the server. |
| updateBeforeConnect | bool | If set to |
| checkDomain | bool | If set to |
| sessionName | string | The name to assign to the session. |
| sessionTimeout | uint | The timeout period for the session. |
| identity | IUserIdentity | The user identity to associate with the session. |
| preferredLocales | IList |
The preferred locales. |
| return | ||
private static async Task RunClient(string address)
{
var clientApp = new ApplicationInstance
{
ApplicationName = "OPC UA StackOverflow Example Client",
ApplicationType = ApplicationType.Client,
ConfigSectionName = "Opc.Client"
};
// load the application configuration.
var clientConfig = await clientApp.LoadApplicationConfiguration(true);
var haveClientAppCertificate = await clientApp.CheckApplicationInstanceCertificate(true, 0);
if (!haveClientAppCertificate)
{
throw new Exception("Application instance certificate invalid!");
}
var endpointConfiguration = EndpointConfiguration.Create(clientConfig);
var selectedEndpoint = CoreClientUtils.SelectEndpoint(address, true, 15000);
var endpoint = new ConfiguredEndpoint(null, selectedEndpoint, endpointConfiguration);
using (var session = await Session.Create(clientConfig, endpoint, false, clientConfig.ApplicationName, 60000, new UserIdentity(new AnonymousIdentityToken()), null))
{
Console.WriteLine("Client connected");
var rootFolders = await session.BrowseAsync(ObjectIds.ObjectsFolder);
Console.WriteLine("Received root folders");
var childFolders = await Task.WhenAll(
from root in rootFolders
select session.BrowseAsync(ExpandedNodeId.ToNodeId(root.NodeId, session.NamespaceUris)));
foreach (var childFolder in childFolders.SelectMany(x => x).OrderBy(c => c.BrowseName.Name))
{
Console.WriteLine(childFolder.BrowseName.Name);
}
Console.WriteLine("Client disconnecting");
session.Close();
Console.WriteLine("Client disconnected");
}
Console.WriteLine("Client disposed");
}
public async Task EndpointConnect()
{
var endpointCollection = DiscoverEndpoints(Module.Configuration, ServerUrl, 60);
var selectedEndpoints = new List <EndpointDescription>();
// Select endpoints
foreach (EndpointDescription endpoint in endpointCollection)
{
if (endpoint.TransportProfileUri == Profiles.UaTcpTransport &&
endpoint.SecurityLevel >= MinimumSecurityLevel &&
endpoint.SecurityMode >= MinimumSecurityMode)
{
// patch endpoint to set the original host name we want to connect to.
var url = new UriBuilder(endpoint.EndpointUrl);
url.Host = ServerUrl.Host;
endpoint.EndpointUrl = url.ToString();
selectedEndpoints.Add(endpoint);
}
}
//
// Sort, but descending with highest level first i.e. return
// < 0 if x is less than y
// > 0 if x is greater than y
// 0 if x and y are equal
//
selectedEndpoints.Sort((y, x) => x.SecurityLevel - y.SecurityLevel);
// Do not emit all exceptions as they occur, only throw them all when no connection can be made.
var exceptions = new List <Exception>(selectedEndpoints.Count);
foreach (EndpointDescription endpoint in selectedEndpoints)
{
ConfiguredEndpoint configuredEndpoint = new ConfiguredEndpoint(
endpoint.Server, EndpointConfiguration.Create(Module.Configuration));
configuredEndpoint.Update(endpoint);
try
{
Console.WriteLine($"Opc.Ua.Client.SampleModule: Trying to create session with mode: {endpoint.SecurityMode}, level:{endpoint.SecurityLevel} to {configuredEndpoint.EndpointUrl}...");
_session = await Session.Create(
Module.Configuration,
configuredEndpoint,
true,
false,
Module.Configuration.ApplicationName,
60000,
// TODO: Make user identity configurable, plus add dedicated security policy
new UserIdentity(new AnonymousIdentityToken()),
null);
if (_session != null)
{
var subscription = new Subscription(_session.DefaultSubscription);
subscription.PublishingInterval = PublishingInterval;
// TODO: Make other subscription settings configurable...
subscription.AddItems(MonitoredItems);
_session.AddSubscription(subscription);
subscription.Create();
Console.WriteLine($"Opc.Ua.Client.SampleModule: Session with mode: {endpoint.SecurityMode}, level:{endpoint.SecurityLevel} to {configuredEndpoint.EndpointUrl} established!");
_session.KeepAlive += new KeepAliveEventHandler(StandardClient_KeepAlive);
// Done
return;
}
exceptions.Add(new Exception($"ERROR: Create session to endpoint {endpoint.ToString()} returned null."));
}
catch (AggregateException ae)
{
exceptions.AddRange(ae.InnerExceptions);
}
catch (Exception ex)
{
exceptions.Add(ex);
}
// ... try another endpoint until we do not have any more...
Console.WriteLine($"Opc.Ua.Client.SampleModule: WARNING Could not create session to endpoint {endpoint.ToString()}...");
}
throw new AggregateException("Failed to find acceptable endpoint to connect to.", exceptions);
}
