public override async Task <TagHelperResolutionResult> GetTagHelpersAsync(Project project, CancellationToken cancellationToken)
{
if (project == null)
{
throw new ArgumentNullException(nameof(project));
}
try
{
TagHelperResolutionResult result = null;
// We're being defensive here because the OOP host can return null for the client/session/operation
// when it's disconnected (user stops the process).
var client = await RazorLanguageServiceClientFactory.CreateAsync(_workspace, cancellationToken);
if (client != null)
{
using (var session = await client.CreateSessionAsync(project.Solution))
{
if (session != null)
{
var jsonObject = await session.InvokeAsync <JObject>(
"GetTagHelpersAsync",
new object[] { project.Id.Id, "Foo", },
cancellationToken).ConfigureAwait(false);
result = GetTagHelperResolutionResult(jsonObject);
}
}
}
if (result == null)
{
// Was unable to get tag helpers OOP, fallback to default behavior.
result = await _defaultResolver.GetTagHelpersAsync(project, cancellationToken);
}
return(result);
}
catch (Exception exception)
{
throw new InvalidOperationException(
Resources.FormatUnexpectedException(
typeof(DefaultTagHelperResolver).FullName,
nameof(GetTagHelpersAsync)),
exception);
}
}
protected virtual Task <TagHelperResolutionResult> ResolveTagHelpersInProcessAsync(Project project, ProjectSnapshot projectSnapshot)
{
return(_defaultResolver.GetTagHelpersAsync(project, projectSnapshot));
}