How should I design my app to meet this criteria ?

pingal

NOTE: This is a NON-GUI app

I've wrote an HTTP upload/download class using QNetworkAccessManager and i use it like below:-

int main(..){

   QCoreApplication app(...);
    HTTP http(&app);

    QNetworkRequest DownloadRequest;
    QNetworkRequest UploadRequest;

    UploadRequest.setUrl(QUrl("path/to/server"));

    http.UploadFile(UploadRequest, (QFileInfo)"path/to/file1");
    http.UploadFile(UploadRequest, (QFileInfo)"path/to/file2");
    http.UploadFile(UploadRequest, (QFileInfo)"path/to/file3");

    DownloadRequest.setUrl(QUrl("link/to/fileX"));
    http.DownloadFile(DownloadRequest);
    
    app.exec();

}

This works fine and now I want to embed this module in another project which is a client app constantly communicating with my server app. So I created a std::thread (not a Qthread) and moved QCoreApplication & app.exec() to avoid being paused in the event loop like below

int main(..){

 std::thread UploadDownloadModule(..);   // this contains the upload/download and app.exec

// do some stuff here

}

This works fine but I want UploadDownloadModule(..) to get finished once the download/upload process completes. I would also like to invoke UploadDownloadModule(..) on request.

How should I design my app to meet the above criteria?

jsulm

@pingal said in How should I design my app to meet this criteria ?:

I want to embed this module in another project which is a client app

Is this app a Qt app?

pingal

@jsulm

The above is a QT app but the project in which i want to embed is NOT a QT App

jsulm

@pingal You could pass UploadDownloadModule a callback function, so it can call it when its finished and pass the result to this callback. To invoke UploadDownloadModule you can simply create a new UploadDownloadModule instance passing needed parameters to it.

pingal

@jsulm :
What about the app.exec() in the callback ?

jsulm

@pingal said in How should I design my app to meet this criteria ?:

What about the app.exec(..) in the callback ?

Why in call back?
app.exec() will be started in the thread.
As soon as the thread finishes it call the call back.

pingal

@jsulm Would you be kind enough to provide me an example (i think i'm not getting you) keeping in view the above picture I gave (?)

Here is the simplified form of my thread function

void UploadDownload() {
    QCoreApplication app(a, nullptr);
    HTTP http(&app);

    QNetworkRequest DownloadRequest;
    DownloadRequest.setUrl(QUrl("link/to/fileX"));
    http.DownloadFile(DownloadRequest);

    app.exec();

}

jsulm

@pingal Untested

void callBack()
{
    std::cout << "Done" << std::endl;
}

typedef void(*CallBack)();
void UploadDownload(CallBack callBack)
{
    // Do the work
    ...
    app.exec();
    // When done call call back
    callBack();
}

std::thread thread(UploadDownload, callBack);