public void CancelLinked()
{
var cts = new CancellationTokenSource();
var token = cts.Token;
using (_disposeToken.Link(ref token)) {
_disposeToken.TryMarkDisposed();
}
token.IsCancellationRequested.Should().BeTrue();
cts.Token.IsCancellationRequested.Should().BeFalse();
}
public async Task <bool> PromptYesNoAsync(string text, CancellationToken cancellationToken)
{
using (_disposeToken.Link(ref cancellationToken)) {
var result = await _workflow.Services.ShowMessageAsync(text, MessageButtons.YesNo, cancellationToken);
return(result == MessageButtons.Yes);
}
}
public async Task TestBrokerConnectionAsync(string name, BrokerConnectionInfo connectionInfo, CancellationToken cancellationToken = default(CancellationToken))
{
using (_disposeToken.Link(ref cancellationToken)) {
await TaskUtilities.SwitchToBackgroundThread();
// Create random name to avoid collision with actual broker client
name = name + Guid.NewGuid().ToString("N");
var brokerClient = CreateBrokerClient(name, connectionInfo, cancellationToken);
if (brokerClient == null)
{
throw new ArgumentException(nameof(connectionInfo));
}
using (brokerClient) {
await TestBrokerConnectionWithRHost(brokerClient, cancellationToken);
}
}
}
public async Task RefreshEnvironmentsAsync(CancellationToken cancellationToken = default(CancellationToken))
{
using (_disposeToken.Link(ref cancellationToken)) {
var session = _rSession;
await TaskUtilities.SwitchToBackgroundThread();
var envs = new List <REnvironment>();
bool success = false;
try {
var traceback = (await session.TracebackAsync(cancellationToken: cancellationToken))
.Skip(1) // skip global - it's in the search path already
.Select(frame => new REnvironment(frame))
.Reverse();
if (traceback.Any())
{
envs.AddRange(traceback);
envs.Add(null);
}
var searchPath = (await session.EvaluateAsync <string[]>("as.list(search())", REvaluationKind.BaseEnv, cancellationToken))
.Except(_hiddenEnvironments)
.Select(name => new REnvironment(name));
envs.AddRange(searchPath);
success = true;
} catch (RException) {
} catch (OperationCanceledException) {
}
await _mainThread.SwitchToAsync(cancellationToken);
var oldSelection = _selectedEnvironment;
_environments.ReplaceWith(success ? envs : _errorEnvironments);
IREnvironment newSelection = null;
if (oldSelection != null)
{
newSelection = _environments?.FirstOrDefault(env => env?.Name == oldSelection.Name);
}
SelectedEnvironment = newSelection ?? _environments.FirstOrDefault();
}
}