I currently use Azure Mobile Services with Offline Sync and I it has been working fine. However I now have come to a problem I can't seem to debug. On the PullAsync it never returns, never goes to the Web API, it never errors, it just seems to be stuck somewhere and I don't know where.
IMobileServiceSyncTable<ResponseType> responseTypeTable = MobileService.GetSyncTable<ResponseType>();
await responseTypeTable.PullAsync(responseTypeTable.Where(c => c.CompanyId == companyId));
I use identical code elsewhere with a different type and it works well.
The only thing that happens is the Windows Phone emulator UI locks up, I can press buttons on the keyboard but the input or buttons are all frozen.
I get this on the Debug Output
The thread 0xb80 has exited with code 259 (0x103).
After a 5 seconds and that's about it. Breakpoints everywhere, nothing happening.
The method was in a Command (I'm using MVVMLight). When I call the function on the class initialization and just hold the value it works fine. There is obviously some bug that occurs when calling PullAsync on an event, in an async RelayCommand but getting the call out of there solves the issue.
I'll leave it at that unless anyone comes back with why it is actually happening. This is just a workaround at the moment.
Related
I have a Windows Phone 8.1 app with Google login, which uses the
GoogleWebAuthorizationBroker.AuthorizeAsync
method. 90 % of the time, the authentication works, however, occasionally, the app just crashes on this line (I am logging right before it, so I am sure). I have the call wrapped inside try - catch, but that doesn't seem to work - exception is never caught.
I am also sure I am calling the method on a UI thread, I am using the DispatcherHelper from MVVMLight for that.
The fact that I am not able to reproduce the crash complicates this a lot, I have not experienced it with debugger attached, only in Release mode, on target device, run locally.
Do you guys have any ideas / clues / pointers? I know I'm not providing a lot of information, but I don't have any..
EDIT> So the error now happened with debugger attached - and the app just froze, last message in Ouput window was
"WinRT information: Cannot get credential from Vault"
But that's normal behavior..
Recently I read a query about "What does console.log do" and I read an answer, tried using it and found that despite the answer stating that it outputs to the console in googles browser, I just tried it and I get no output.
I did try this code:
function put(p){
if ( window.console && window.console.log ) {
console.log(p); // console is available
}else{
alert(p);
}
}
BUT... I get neither console output or alert and furthermore .log is a Math property, what gives with that?
Make sure that in the Developer Tools the Filter in the console section is set to All or Logs...
I had a similar experience where I couldn't see any of my console.log output and it was because the console was set to filter on Errors only... All the log entries were there - they just weren't visible.
Bonus marks: you can also Ctrl + Click to select multiple filters (Errors + Logs for example).
Press F12 and look at in Developer Tools: Console. I tried your code just now, works fine for me -- Chrome version 30.0.
Since you're after console logging, not mathematical logarithms, perhaps you could stop going on about there being similarly-named function in the Math object. It's not relevant here whatsoever.
You're also coming across just a little shouty. console.log() works fine, and your question didn't indicate that you knew where to look. This is totally your problem, but I'm trying to help you. I can obviously only go on the information you provide, and I can't say your initial question was written very clearly.
It appears, since the snippet of code you posted works here absolutely fine, that your calling code & containing (which you haven't posted) would be the cause of the problem. You should debug these, to find out what's going wrong.
Do you know how to use the Chrome debugger? Are there any error messages showing in Chrome or on the console?
Test it on a simple page if necessary, to rule out other errors in the page/ or surrounding context breaking it. One common mistakes is declare functions in a jQuery ready handler or similar, and then try & access them globally. Make sure your logging function is actually global (outside any other function(){} or object {} blocks).
Lastly, it's good to have a logging function for portability (I have one myself) but put() is not a good name for it. Naming it consoleLog() or log() would be better.
Had the same issue .
Make sure your using de right path when you try import thing's .
Example whit my issue :
Wrong path ----> ** import normalizedData from 'normalizr'; **
Right path ---> ** import normalizedData from '../schemas/index.js'; **
I had also faced the same problem. Make sure you apply no filter in the console. It worked for me.
I am trying to show an array of TPANELs to be used by the user as a menu system. It all seems to work fine but here's the issue.
If I always click the first item (i.e., TPanel), then I can click the other items as well. But if I start by clicking the last item, it shows the error "Access violation" AFTER it has shown the items.
The strange thing is that despite the error, the system does not crash. So I enabled the debugger (DBG). Now it crashes with the error as follows:
And once the program stops, I see the following in the history window of the debugger.
Please note that I'm not keen right now in fixing this error as I think this is trivial. But I want to be able to capture the error as it occurs and do something (for now I want to ignore it).
I'm using Ubuntu 12.04 with Lazarus 1.0.10.
The method I use must work on WINDOWS and LINUX.
Thanks in advance for any help!
Generally, to catch an exception, there's the try..except block. For sure your goal is not to catch an exception and ignore it, but find it in your code and fix the source of the problem. Of course, there might be situations, where the risk of an exception is high or expected so the use of a try..except block is necessary there. Those blocks of code we are enclosing this way:
procedure TForm1.Button1Click(Sender: TObject);
var
NotExistingPanel: TPanel;
begin
try
NotExistingPanel.Caption := ''; // <- this will raise an access violation
except
on E: Exception do
ShowMessage('An exception was raised: ' + E.Message);
end;
end;
Your problem will be somewhere in an OnMouseUp event handler of some of your controls and it's been caused by accessing the memory, that the CPU cannot physically address. This might happen e.g. when you access an object which has not been created, or already released, but there are also many different ways how to cause an access violation.
First, a big thank you to TLama for all the explanations and directions. I have to accept his answer as I've built mine based on that. I'm only posting this as an answer so that another person who's a beginner to Lazarus may find this useful. I'm not in anyway suggesting that this is the best thing to do, but this is what I want to do for now. That is, when a certain exception occurs, I want to trap it and deal with it.
Given that,
I am dynamically creating a set of TPanels to look like buttons
Each TPanel has assigned to it a mouseclick event
Let's assume that there are 10 such 'buttons' (actually TPanels).
The problem:
When I first click on the first button, I can then click on another one (eg: the 5th). But if I first click the 5th or anything else other than the first, the program throws the 'Access violation' error. Note however, that the program doe not crash despite the ugly warning about data corruption and stuff. So the user can simply click ok and continue. Strangely then, with subsequent clicks, this problem reduces! I know that's funny.
Now, as explained by TLama, the error occurs when the mouse is being released AFTER clicking a button.
But here's my problem... I don't have a mouseup event. That's part of Pascal.
So now, I want to ignore the mouseup event (at least for now). There MUST be a better way.
But there's another issue. I cannot ignore what I don't have! And I don't have a mouseup event. So I finally decided to capture this error at application level like this:
On the main form, I put this code:
procedure TfrmMainForm.CatchErr(Sender: TObject; e:exception);
begin
if e.Message <> 'Access violation' then ShowMessage('MOL: ' + e.Message);
end;
And then on form create, I put this:
Application.OnException:=#CatchErr;
And (for now) I can circumvent this issue.
Once again, as TLama has indicated, this is not good advice. Nonetheless, it is what I wanted to do.
Also what makes it harder is that the error is occuring in mouseup, which is in control.inc. And this is not my file. Rather it's part of Lazarus. I think it would be better if we had a way of telling Lazarus to delete that event for the TPanels in the code. I think it involves re-writing a derived class for it and I don't see how that's any good for me right now :)
Thanks again TLama!
I'm trying to capture audio using WASAPI. My code is largely based on the ChatterBox VoIP sample app. I'm getting audio buffers, but they are all silent (flagged AUDCLNT_BUFFERFLAGS_SILENT).
I'm using Visual Studio Express 2012 for Windows Phone. Running on the emulator.
I had the exact same problem and managed to reproduce it in the ChatterBox sample app if I set Visual Studio to native debugging and at any point stepped through the code.
Also, closing the App without going through the "Stop" procedure and stopping the AudioClient will require you to restart the emulator/device before being able to capture audio data again.
It nearly drove me nuts before I figured out the before mentioned problems but I finally got it working.
So..
1. Be sure to NOT do native debugging
2. Always call IAudioClient->Stop(); before terminating the App.
3. Make sure you pass the correct parameters to IAudioClient->Initialize();
I've included a piece of code that works 100% of the time for me. I've left out error checking for clarity..
LPCWSTR pwstrDefaultCaptureDeviceId =
GetDefaultAudioCaptureId(AudioDeviceRole::Communications);
HRESULT hr = ActivateAudioInterface(pwstrDefaultCaptureDeviceId,
__uuidof(IAudioClient2), (void**)&m_pAudioClient);
hr = m_pAudioClient->GetMixFormat(&m_pwfx);
m_frameSizeInBytes = (m_pwfx->wBitsPerSample / 8) * m_pwfx->nChannels;
hr = m_pAudioClient->Initialize(AUDCLNT_SHAREMODE_SHARED,
AUDCLNT_STREAMFLAGS_NOPERSIST | AUDCLNT_STREAMFLAGS_EVENTCALLBACK,
latency * 10000, 0, m_pwfx, NULL);
hr = m_pAudioClient->SetEventHandle(m_hCaptureEvent);
hr = m_pAudioClient->GetService(__uuidof(IAudioCaptureClient),
(void**)&m_pCaptureClient);
And that's it.. Before calling this code I've started a worker thread that will listen to m_hCaptureEvent and call IAudioCaptureClient->GetBuffer(); whenever the capture event is triggered.
Of course using Microsoft.XNA.Audio.Microphone works fine to, but it's not always an option to reference the XNA framework.. :)
It was a really annoying problem which waste about 2 complete days of mine.My problem was solved by setting AudioClientProperties.eCatagory to AudioCategory_Communications instead of AudioCategory_Other.
After this long try and error period I am not sure that the problem won't repeat in the future because the API doesn't act very stable and every run may return a different result.
Edit:Yeah my guess was true.Restarting the wp emulator makes the buffer silent again.But changing the AudioClientProperties.eCatagory back to AudioCategory_Other again solve it.I still don't know what is wrong with it and what is the final solution.
Again I encounter the same problem and this time commenting (removing) the
properties.eCategory = AudioCategory_Communications;
solve the problem.
I can add my piece of advice for Windows Phone 8.1.
I made the following experiment.
Open capture device. Buffers are not silent.
Open render device with AudioDeviceRole::Communications. Buffers immediately go silent.
Close render device. Buffers are not silent.
Then I opened capture device with AudioDeviceRole::Communications and capture device works fine all the time.
For Windows 10 capture device works all the time, no matter if you open it with AudioDeviceRole::Communications or not.
I've had the same problem. It seems like you can either use only AudioCategory_Other or create an instance of VoipPhoneCall and use only AudioCategory_Communications.
So the solution in my case was to use AudioCategory_Communications and create an outgoing VoipPhoneCall. You should implement the background agents as in Chatterbox VoIP sample app for the VoipCallCoordinator to work .
We are using a Cumulus server as our RTMFP server to implement a voice chat.
The voice streaming with NetStreams works perfectly fine almost no delay here, but we also want to transfer the activity level of the microphone of each member of the NetGroup.
So we tried transferring the data using NetGroup.post(data). That worked well, but had a delay of ~500ms even when testing with multiple clients on the same machine!
Obviously, half a second in microphone activity is just waaay to much delay to display it in any way.
Now we are trying to use direct routing with NetGroup.sendToAllNeighbors(, but it simply does nothing. I have read all the documentation on it and normally a NetGroup status event with "NetGroup.SendTo.Notify" should be triggered on the receiving clients. Instead, nothing happens.
Here is the code, which is called each frame:
var tsObject :TimestampedObject = new TimestampedObject();
tsObject.timestamp = (new Date()).getTime();
tsObject.sender = _netConnection.nearID;
tsObject.object = _mic.activityLevel;
_netGroup.sendToAllNeighbors(tsObject);
I know each frame is a bit much, but for now it is just a test case.
What are we doing wrong? As I said, voice communication itself works fine. As does Netgroup.post(data), which is just way too slow to use for this use case.