/// <summary>
/// Creates an asynchronous Task object that executes the given plugin on a background thread and
/// invokes all other callbacks (success, failure, etc.) on the UI thread.
/// </summary>
/// <param name="cancellationToken"></param>
/// <param name="plugin"></param>
/// <param name="pluginRunner"></param>
/// <returns></returns>
private Task <bool> RunPluginSync(CancellationToken cancellationToken, IPlugin plugin, ExecutePluginHandler pluginRunner)
{
var task = new TaskBuilder()
.OnThread(_callbackScheduler)
.CancelWith(cancellationToken)
.BeforeStart(delegate
{
var progressProvider = _pluginRepository.GetProgressProvider(plugin);
progressProvider.Updated -= ProgressProviderOnUpdated;
progressProvider.Updated += ProgressProviderOnUpdated;
progressProvider.Reset();
progressProvider.Start();
})
.DoWork(delegate(IThreadInvoker invoker, CancellationToken token)
{
pluginRunner(token);
})
.Fail(delegate(ExceptionEventArgs args)
{
var progressProvider = _pluginRepository.GetProgressProvider(plugin);
if (args.Exception is OperationCanceledException)
{
progressProvider.Cancel();
}
else
{
progressProvider.Error(args.Exception);
HandleUnhandledException(args.Exception);
}
})
.Succeed(delegate
{
var progressProvider = _pluginRepository.GetProgressProvider(plugin);
if (cancellationToken.IsCancellationRequested)
{
progressProvider.Cancel();
}
else
{
progressProvider.Succeed();
}
})
.Build()
;
task.RunSynchronously();
return(task);
}