[purejavacomm] Re: Detect usb cable unplugged?

  • From: Kustaa Nyholm <Kustaa.Nyholm@xxxxxxxxxxxx>
  • To: "purejavacomm@xxxxxxxxxxxxx" <purejavacomm@xxxxxxxxxxxxx>
  • Date: Thu, 21 Nov 2013 12:48:29 +0200

As far as the platform allows/enables PJC read throws an exception if a device 
is unplugged.

Which platform you are using?

For Linux and Mac OS X, the inputstream.read() is very thin layer over the 
POSIX read()
and if the OS does not return from a read when the device becomes dysfunctional 
is little that can be done. IIRC in that respect OS X did not behave as it 

br Kusti

From: ant elder <ant.elder@xxxxxxxxx<mailto:ant.elder@xxxxxxxxx>>
Reply-To: "purejavacomm@xxxxxxxxxxxxx<mailto:purejavacomm@xxxxxxxxxxxxx>" 
Date: Thu, 21 Nov 2013 12:32:06 +0200
To: "purejavacomm@xxxxxxxxxxxxx<mailto:purejavacomm@xxxxxxxxxxxxx>" 
Subject: [purejavacomm] Detect usb cable unplugged?

Is there any way to have an application notified by PureJavaComm when a usb 
serial port is unplugged?

Presently unplugging the cable without first closing the PureJavaComm 
SerialPort can cause a hang if a read is done on the still open port. It would 
be nice if the application could be notified when the cable is unplugged and so 
close the SerialPort, or at least if a read on a SerialPort thats been 
unplugged would throw an exception.


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