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POReading Stream after using enableReceiveTimeout
 

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    <p>I am currently working on a Java project, one of the aims of which is to display current position of the user on a map. After code completion, I realized that there is a possibility of the user unplugging the GPS device while the application is still running. On recreating the above scenario, I found that the application forever hangs at the code :</p> <pre><code>detectedGPSPortBufferReader.readLine(); </code></pre> <p>So, I went to the good old Java Docs and found the method <strong>enableReceiveTimeout()</strong> and everything works perfect. <em>(Value is 30000, 30 seconds)</em></p> <p>Now, I have managed to think of another scenario, wherein the user may re-plug the device back on. In this scenario, my clientele would want the device to start reading again. But unfortunately that ain't happening.</p> <p>I am working with my buddy "The Good Old Java Docs" and would love for any one of you geek gods to guide me on my journey.</p> <p>My Code :</p> <pre><code>try { myGPSConnector.detectedGPSPort.enableReceiveTimeout(3000); if(myGPSConnector.detectedGPSPortBufferReader.readLine() != null) { myGPSConnector.nmeaResponse = myGPSConnector.detectedGPSPortBufferReader.readLine(); System.out.println(myGPSConnector.nmeaResponse); } } catch (Exception e) { locationString = "GPS Device not detected."; } </code></pre> <p>@derrabink : It can be a different stream, cuz I tried to work with the following extension to my code :</p> <pre><code>try { myGPSConnector.detectedGPSPort.enableReceiveTimeout(3000); if(myGPSConnector.detectedGPSPortBufferReader.readLine() != null) { myGPSConnector.nmeaResponse = myGPSConnector.detectedGPSPortBufferReader.readLine(); System.out.println(defaultGPSConnector.nmeaResponse); } } catch (Exception e) { locationString = "GPS Device not detected."; try { defaultGPSConnector.detectedGPSPort.enableReceiveTimeout(30); } catch (UnsupportedCommOperationException e1) { System.out.println("UnsupportedCommOperationException"); } try { locationString = defaultGPSConnector.detectedGPSPortBufferReader.readLine(); } catch (IOException e1) { System.out.println("IOException "); } </code></pre> <p>And It always prints <strong>IOException</strong></p>
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    1. COCan it be that after reconnecting there will be a different stream? If so, you might want to start probing the reconnected device's stream every so often (until success), once readLine() takes a little while.
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    2. COAlso, are you sure that your two readLine() statements are correct the way they are? Looks to me that you're doing two reads, and only keeping the result of the second one.
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    3. COWorks perfectly fine my lord...
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