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From:	"PAULUS, Raimund, TI-ABN" <Raimund DOT Paulus AT dillinger DOT biz>
To:	"'cygwin AT cygwin DOT com'" <cygwin AT cygwin DOT com>
Subject:	Re: Problems using Qt5 and Apache Thrift
Thread-Topic:	Problems using Qt5 and Apache Thrift
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Date:	Thu, 26 Mar 2020 06:34:34 +0000
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Supplement to my first email: the ascii-interface is created with libcurses.

> -----Ursprüngliche Nachricht-----
> Von: Andrey Repin [mailto:anrdaemon AT yandex DOT ru]
> Gesendet: Mittwoch, 25. März 2020 12:13
> An: PAULUS, Raimund, TI-ABN; cygwin AT cygwin DOT com
> Betreff: Re: Problems using Qt5 and Apache Thrift
> 
> Greetings, PAULUS, Raimund, TI-ABN!
> 
> > Problems using Qt5 and Apache Thrift
> 
> ...snip...
> 
> > Now i want to implement the interface parts with Qt 5. Here is the new program
> sequence:
> 
> > //------------------------------------------------------------------------------
> > program starts
> > step 1: make the connection to the Linux server (Apache Thrift)
> > step 2: initialize Qt interface (create widgets, buttons, ...)
> > step 3: user interface (Qt)
> > step 4: data transfer PC <-> Linux-Host (Apache Thrift)
> > step 5: user interface (Qt)
> > step 6: data transfer PC <-> Linux-Host (Apache Thrift)
> > ...
> > ...
> > ...
> > step n-1: end Qt app
> > step n: close the connection to the host (Apache Thrift)
> > program ends
> > //------------------------------------------------------------------------------
> 
> > During step 2 the connection to the linux server is broken. You can see it
> > with the netstat command. First error message arises in step 4:
> 
> > "TSocket::write_partial() send() <Host: my_host Port: 9090>Broken pipe"
> 
> I strongly suggest placing communication service in its own thread.
> Then you could manage connection without having to worry about blocking
> timeouts caused by GUI operations.
> They will run asynchronously.
> 
> > On a Linux box the client program runs perfectly.
> 
> Only by coincidence, I suppose.
> 
> > On the windows box the program works, if i initalize Qt before the
> > connection to the server is made (step 2 before step 1). But that is not
> > acceptable for me, because afterwards other widgets and buttons are created
> > and i can not close and create the connection at each point.
> 
> I suppose, the server dropping connection by timeout. But I'd urge you to
> investigate this further.
> 
> > For the tests I used the examples from the Apache Thrift Tutorial.
> 
> Please include examples as text/plain attachments, if they are longer than a
> few lines.
> 
> 
> --
> With best regards,
> Andrey Repin
> Wednesday, March 25, 2020 14:08:25
> 
> Sorry for my terrible english...

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