private void RunCreateSessionTask(ConnectionDetails connectionDetails, string uri)
{
Logger.Write(LogLevel.Normal, "Creating OE session");
CancellationTokenSource cancellationTokenSource = new CancellationTokenSource();
if (connectionDetails != null && !string.IsNullOrEmpty(uri))
{
Task task = CreateSessionAsync(connectionDetails, uri, cancellationTokenSource.Token);
CreateSessionTask = task;
Task.Run(async() =>
{
ObjectExplorerTaskResult result = await RunTaskWithTimeout(task,
settings?.CreateSessionTimeout ?? ObjectExplorerSettings.DefaultCreateSessionTimeout);
if (result != null && !result.IsCompleted)
{
cancellationTokenSource.Cancel();
SessionCreatedParameters response = new SessionCreatedParameters
{
Success = false,
SessionId = uri,
ErrorMessage = result.Exception != null ? result.Exception.Message : $"Failed to create session for session id {uri}"
};
await serviceHost.SendEvent(CreateSessionCompleteNotification.Type, response);
}
return(result);
}).ContinueWithOnFaulted(null);
}
}
private async Task <ObjectExplorerTaskResult> RunTaskWithTimeout(Task task, int timeoutInSec)
{
ObjectExplorerTaskResult result = new ObjectExplorerTaskResult();
TimeSpan timeout = TimeSpan.FromSeconds(timeoutInSec);
await Task.WhenAny(task, Task.Delay(timeout));
result.IsCompleted = task.IsCompleted;
if (task.Exception != null)
{
result.Exception = task.Exception;
}
else if (!task.IsCompleted)
{
result.Exception = new TimeoutException($"Object Explorer task didn't complete within {timeoutInSec} seconds.");
}
return(result);
}
private void RunExpandTask(ObjectExplorerSession session, ExpandParams expandParams, bool forceRefresh = false)
{
CancellationTokenSource cancellationTokenSource = new CancellationTokenSource();
Task task = ExpandNodeAsync(session, expandParams, cancellationTokenSource.Token, forceRefresh);
ExpandTask = task;
Task.Run(async() =>
{
ObjectExplorerTaskResult result = await RunTaskWithTimeout(task,
settings?.ExpandTimeout ?? ObjectExplorerSettings.DefaultExpandTimeout);
if (result != null && !result.IsCompleted)
{
cancellationTokenSource.Cancel();
ExpandResponse response = CreateExpandResponse(session, expandParams);
response.ErrorMessage = result.Exception != null ? result.Exception.Message: $"Failed to expand node: {expandParams.NodePath} in session {session.Uri}";
await serviceHost.SendEvent(ExpandCompleteNotification.Type, response);
}
return(result);
}).ContinueWithOnFaulted(null);
}
