I have the following code:
public async Task IntiateDataFetchingProcess(string[] args)
{
try
{
ProcessArgs(args);
Log.Information("Run Mode: {RunModeID}", RunModeID);
switch (RunModeID)
{
case RunModeType.A:
await MethodAAsync();
break;
case RunModeType.B:
await MethodBAsync();
break;
case RunModeType.C:
TestMethod();
break;
default:
break;
}
}
catch (Exception ex)
{
throw;
}
}
private async Task MethodBAsync()
{
Console.WriteLine(DateTime.Now.ToLongTimeString());
// Call to webservice to get the data
var response = await _service.GetDataAsync(input1, request);
Console.WriteLine(DateTime.Now.ToLongTimeString());
}
On debugging I found that the execution call comes to the below line (of method: MethodBAsync) and stops there.
var response = await _service.GetDataAsync(input1, request);
Can anyone help me to know is there anything that I am missing here.
Ah, your code is getting deadlocked!
You just need to add .ConfigureAwait(false); to each line that you are awaiting.
Example:
var response = await _service.GetDataAsync(input1, request);
becomes
var response = await _service.GetDataAsync(input1,
request).ConfigureAwait(false);
For more information on .ConfigureAwait(), Stephen Cleary wrote an awesome post on it.
Related
I have a durable function that calls a method that simply adds a row to an efcore object. It doesn't call db save.
When I step through the code, and get to the for loop, it will immediately jump to the line after the for loop. If I step into the call to add the efcore object, and back to the for loop, it continues and loops to the next item. If I press F5 to let it go without debugging, it immediately "breaks" the for loop.
It jumps out of the for loop where i wrote //HERE!!!!!!
I'm pulling my hair out on this one.
obligatory code:
//foreach (stagingFileMap stagingFileMap in fileMaps)
foreach (stagingFileMap stagingFileMap in fileMaps)
{
if (ActivitySyncHelper.IsSyncCancelled(aso, _configuration))
{
break;
}
if (!string.IsNullOrEmpty(stagingFileMap.URL))
{
// Ensure the url is valid
try
{
string x = await GetTotalBytes(stagingFileMap.URL);
double.TryParse(x, out double fileByteCount);
if (fileByteCount > 0)
{
// Create or update the video in vimeo
if (string.IsNullOrEmpty(stagingFileMap.VimeoId))
{
// Azure won't be ready with its backups, so use confex host for video 'get'
string title = stagingFileMap.FileName;
if (stagingFileMap.FileName.Length > 127)
{
title = stagingFileMap.FileName.Substring(0, 127);
}
Video video = vimeoClient.UploadPullLinkAsync(stagingFileMap.URL, title, stagingFileMap.id, meetingIdFolder.Uri).Result;
stagingFileMap.VimeoId = video.Id.ToString();
stagingFileMap.VimeoId = video.Id.ToString();
//HERE!!!!!!
await syncLog.WriteInfoMsg($"Vimeo create {stagingFileMap.FileName}");
//HERE!!!!!!
}
else
{
// Attempt to pull the existing video and update it
if (long.TryParse(stagingFileMap.VimeoId, out long videoId))
{
Video video = vimeoClient.GetVideoAsync(videoId).Result;
if (video.Id.HasValue)
{
Video res = await vimeoClient.UploadPullReplaceAsync(stagingFileMap.URL, video.Id.Value, fileByteCount);
await syncLog.WriteInfoMsg($"Vimeo replace {stagingFileMap.FileName} id {res.Id}");
}
}
}
break;
}
}
catch (Exception ex)
{
// IDK what to do besides skip it and continue
// log something once logging works
await syncLog.WriteErrorMsg(aso, ex.Message);
await syncLog.Save();
continue;
}
// We need to save here requently because if there is big error, all the work syncing to vimeo will be desync with the DB
dbContext.Update(stagingFileMap);
await dbContext.SaveChangesAsync();
await syncLog.Save();
}
}
await dbContext.DisposeAsync();
public async Task WriteInfoMsg( string msg)
{
SyncAttemptDetail sad = new()
{
SyncAttemptId = _id,
Message = msg,
MsgLevel = SyncAttemptMessageLevel.Info,
AddDate = DateTime.UtcNow,
AddUser = "SYSTEM"
};
await _dbContext.SyncAttemptDetail.AddAsync(sad);
}
I'm dumb. Theres LITERALLY a break command in there.
The await will create a task and immediately return it (the debugger will follow this path too). The loop will continue in the task.
To attach the debugger to the task, add a break point after the await.
I'm building a Xamarin app and for the geolocation, I'm using the GeolocatorPlugin
The problem is that once the code wants to get the position, the code exists without warning.
My class fields:
private Position position;
private IGeolocator locator = CrossGeolocator.Current;
My page constructor:
public MainPage()
{
InitializeComponent();
locator.PositionChanged += Locator_PositionChanged;
locator.PositionError += Locator_PositionError;
}
OnAppearing event is calling the getLocationPermission:
private async Task GetLocationPermission()
{
var status = await CrossPermissions.Current.CheckPermissionStatusAsync(Permission.LocationWhenInUse);
if (status != PermissionStatus.Granted)
{
//Not granted, request permission
if (await CrossPermissions.Current.ShouldShowRequestPermissionRationaleAsync(Permission.LocationWhenInUse))
{
// This is not the actual permission request
await DisplayAlert("Need your permission", "We need to access your location", "Ok");
}
// This is the actual permission request
var results = await CrossPermissions.Current.RequestPermissionsAsync(Permission.LocationWhenInUse);
if (results.ContainsKey(Permission.LocationWhenInUse))
status = results[Permission.LocationWhenInUse];
}
//Already granted, go on
if (status == PermissionStatus.Granted)
{
//Granted, get the location
GetLocation();
await GetVenues();
await locator.StartListeningAsync(TimeSpan.FromMinutes(30), 500);
}
else
{
await DisplayAlert("Access to location denied", "We don't have access to your location.", "OK");
}
}
The permission is granted and gets to the GetLocation() method:
private async void GetLocation()
{
//var locator = CrossGeolocator.Current;
try
{
var myPosition = await locator.GetPositionAsync();
position = new Position(myPosition.Latitude, myPosition.Longitude);
}
catch (Exception ex)
{
throw;
}
if (position == null)
{
//Handle exception
}
}
Once the line is reached with locator.GetPositionAsync(), it stops. No exception is thrown, also the PositionError isn't raised.
I have no idea why, but in the beginning it worked once, never worked after that.
The location settings in de Android Emulator are as follow:
Based on my research, you did not acheved that Location Changes like this link
I wrote a demo about Location changes. This is running screenshot.
This is my demo
https://github.com/851265601/GeolocationDemo
I have this simple dialog, with 2 simple waterfall steps.
The user sees "How may I help you today?" and when it answers, nothing happens. I can't get Validate to work.
Am I missing something? I'm using SDK 4.1.5.
public ComplaintsDialog() : base(nameof(ComplaintsDialog))
{
var steps = new WaterfallStep[]
{
Ask,
Validate
};
AddDialog(new WaterfallDialog("flow", steps));
AddDialog(new TextPrompt("asking"));
}
private static async Task<DialogTurnResult> Ask(WaterfallStepContext sc, CancellationToken cancellationToken)
{
return await sc.PromptAsync("asking", new PromptOptions { Prompt = new Activity { Text = "How may I help you today?", Type= ActivityTypes.Message} }, cancellationToken);
}
private static async Task<DialogTurnResult> Validate(WaterfallStepContext sc, CancellationToken cancellationToken)
{
var answer = sc.Result;
await sc.Context.SendActivityAsync(answer.ToString());
return await sc.EndDialogAsync();
}
}
UPDATE
I tried to simplify the code, and this is how I currently call ComplaintsDialog directly from the main bot.
It looks like the stack is always empty when it gets to await dc.ContinueDialogAsync();, so it's going into a loop and start ComplaintsDialog over and over again
public async Task OnTurnAsync(ITurnContext turnContext, CancellationToken cancellationToken)
{
// Create dialog context.
var dc = await _dialogs.CreateContextAsync(turnContext);
switch (turnContext.Activity.Type)
{
case ActivityTypes.Message:
// Continue outstanding dialogs.
await dc.ContinueDialogAsync();
// Begin main dialog if no outstanding dialogs/ no one responded.
if (!dc.Context.Responded)
{
await dc.BeginDialogAsync(nameof(ComplaintsDialog));
}
break;
case ActivityTypes.ConversationUpdate:
if (dc.Context.Activity.MembersAdded != null && dc.Context.Activity.MembersAdded.Any())
{
foreach (var newMember in dc.Context.Activity.MembersAdded)
{
if (newMember.Id != dc.Context.Activity.Recipient.Id)
{
await dc.BeginDialogAsync(nameof(WelcomeDialog));
}
}
}
break;
}
}
The code example you provided looks like it should be working so the problem is probably elsewhere.
My guess is that you are starting the ComplaintsDialog inside of a WaterfallStep (from another dialog) so make sure that you are calling the BeginDialogAsync method like this:
return await stepContext.BeginDialogAsync(nameof(ComplaintsDialog));
instead of:
await stepContext.BeginDialogAsync(nameof(ComplaintsDialog));
If this is not the error probably more information is necessary
Update
Your problem is on the OnTurnAsync method. You're not saving the new turn into the conversation state. The Message case on your switch should look like this:
case ActivityTypes.Message:
if (dc.ActiveDialog == null)
{
await dc.BeginDialogAsync(nameof(ComplaintsDialog), cancellationToken);
}
else
{
await dc.ContinueDialogAsync(cancellationToken);
}
await _accessors.ConversationState.SaveChangesAsync(turnContext);
break;
And your constructor:
private readonly MyBotAccessors _accessors;
public MyBot(MyBotAccessors accessors, ILoggerFactory loggerFactory)
{
...
_accessors = accessors ?? throw new System.ArgumentNullException(nameof(accessors));
...
}
SaveChangesAsync documentation
Info: Despite using the WebSocket tag, I am using MessageWebSocket in my code because I am coding on UWP.
MessageWebSocket has an event called MessageReceived. I added an TypedEventHandler to this event when initializing the MessageWebSocket:
messageWebSocket.MessageReceived += new TypedEventHandler<MessageWebSocket, MessageWebSocketMessageReceivedEventArgs>(OnMessageRecieved);
After sending data with a method called SendData(), I expected that the MessageReceived event is fired. But it won't and I don't know why.
This is my SendData() method:
private async void SendData(DataWriter dataWriter)
{
try
{
_evaLogger.Info("Trying to send data...");
IBuffer buffer = dataWriter.DetachBuffer();
await messageWebSocket.OutputStream.WriteAsync(buffer);
_evaLogger.Info("Data was sent");
}
catch (Exception e)
{
_evaLogger.Error(e.Message, e);
}
}
If not after sending data, when does MessageWebSocket receive data?
I was able to figure out what the problem was. The server was expecting to get a text, instead I send data to the server. This is how the solution for sending text looks like:
private async Task SendData(DataWriter dataWriter)
{
try
{
_evaLogger.Info("Trying to send data...");
await dataWriter.StoreAsync();
_evaLogger.Info("Data was sent");
}
catch (Exception e)
{
_evaLogger.Error(e.Message, e);
}
}
It's also important to set the the MessageType to Utf8:
messageWebsocket.Control.MessageType = SocketMessageType.Utf8;
My code crashes and gives the following error on simulator. It attempts to run the try block in the GetDataFromOdataService() method and throws an error and also issue an alert. I am using Xamarin.Form
using Simple.OData.Client;
using System.Threading.Tasks;
private ODataClient mODataClient;
protected async override void OnAppearing ()
{
base.OnAppearing ();
await InitializeDataService ();
await GetDataFromOdataService();
}
public async Task <bool> InitializeDataService(){
try {
mODataClient = new ODataClient ("http://services.odata.org/Northwind/Northwind.svc/");
}
catch {
await DisplayAlert("Error", "Connection Error", "OK", "Cancel");
System.Diagnostics.Debug.WriteLine("ERROR!");
}
return true;
}
public async Task<bool> GetDataFromOdataService (){
try {
myCustomers= await mODataClient.For("Customers").Top(10).FindEntriesAsync();
}
catch {
await DisplayAlert("Error", "Connection Error", "OK", "Cancel");
System.Diagnostics.Debug.WriteLine("ERROR!");
}
return true;
}
Couple issues:-
In the constructor it was doing var list = new ListView() which constrained it locally than setting the class level scope variable. This was therefore adjusted to list = new ListView().
The other thing, was in the GetTheData function where the items source was being assigned as list.ItemsSource = myList; where it needed changing to list.ItemsSource = Customers;.
I've repackaged the zip file up and sent to you. Let me know if this works for you? You should now be able to see all your customers in the ListView.