/// <summary>
/// Browse all references
/// </summary>
private static async Task <BrowseResponseApiModel> NodeBrowseAsync(
ITwinServiceApi service, string endpoint, BrowseRequestApiModel request)
{
while (true)
{
var result = await service.NodeBrowseFirstAsync(endpoint, request);
while (result.ContinuationToken != null)
{
try {
var next = await service.NodeBrowseNextAsync(endpoint,
new BrowseNextRequestApiModel {
ContinuationToken = result.ContinuationToken,
Header = request.Header,
ReadVariableValues = request.ReadVariableValues,
TargetNodesOnly = request.TargetNodesOnly
});
result.References.AddRange(next.References);
result.ContinuationToken = next.ContinuationToken;
}
catch (Exception) {
await Try.Async(() => service.NodeBrowseNextAsync(endpoint,
new BrowseNextRequestApiModel {
ContinuationToken = result.ContinuationToken,
Abort = true
}));
throw;
}
}
return(result);
}
}
/// <summary>
/// Browse all references if max references is null and user
/// wants all. If user has requested maximum to return uses
/// <see cref="ITwinServiceApi.NodeBrowseFirstAsync"/>
/// </summary>
/// <param name="service"></param>
/// <param name="endpoint"></param>
/// <param name="request"></param>
/// <param name="ct"></param>
/// <returns></returns>
public static async Task <BrowseResponseApiModel> NodeBrowseAsync(
this ITwinServiceApi service, string endpoint, BrowseRequestApiModel request,
CancellationToken ct = default)
{
if (request.MaxReferencesToReturn != null)
{
return(await service.NodeBrowseFirstAsync(endpoint, request, ct));
}
while (true)
{
// Limit size of batches to a reasonable default to avoid communication timeouts.
request.MaxReferencesToReturn = 500;
var result = await service.NodeBrowseFirstAsync(endpoint, request, ct);
while (result.ContinuationToken != null)
{
try {
var next = await service.NodeBrowseNextAsync(endpoint,
new BrowseNextRequestApiModel {
ContinuationToken = result.ContinuationToken,
Header = request.Header,
ReadVariableValues = request.ReadVariableValues,
TargetNodesOnly = request.TargetNodesOnly
}, ct);
result.References.AddRange(next.References);
result.ContinuationToken = next.ContinuationToken;
}
catch (Exception) {
await Try.Async(() => service.NodeBrowseNextAsync(endpoint,
new BrowseNextRequestApiModel {
ContinuationToken = result.ContinuationToken,
Abort = true
}));
throw;
}
}
return(result);
}
}