private HistoryReadValuesTests <EndpointModel> GetTests()
{
var codec = new JsonVariantEncoder();
return(new HistoryReadValuesTests <EndpointModel>(
() => new HistoricAccessAdapter <EndpointModel>(new AddressSpaceServices(_server.Client,
codec, _server.Logger), codec, _server.Logger),
new EndpointModel {
Url = $"opc.tcp://{Dns.GetHostName()}:{_server.Port}/UA/SampleServer"
}));
}
/// <summary>
/// Read value
/// </summary>
/// <param name="client"></param>
/// <param name="endpoint"></param>
/// <param name="elevation"></param>
/// <param name="readNode"></param>
/// <returns></returns>
public static Task <JToken> ReadValueAsync(this IEndpointServices client,
EndpointModel endpoint, CredentialModel elevation, string readNode)
{
var codec = new JsonVariantEncoder();
return(client.ExecuteServiceAsync(endpoint, elevation, session => {
var nodesToRead = new ReadValueIdCollection {
new ReadValueId {
NodeId = readNode.ToNodeId(session.MessageContext),
AttributeId = Attributes.Value
}
};
var responseHeader = session.Read(null, 0, TimestampsToReturn.Both,
nodesToRead, out var values, out var diagnosticInfos);
var result = codec.Encode(values[0].WrappedValue,
out var tmp, session.MessageContext);
return Task.FromResult(result);
}));