JavaSEPort$EDTViolation: EDT Violation Stack when running MapsDemo on simulator at PointsLayer creation

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Pete Knight

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Jan 29, 2015, 5:00:52 AM1/29/15
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Whilst running the MapsDemo on the simulator after building on Eclipse and running in the simulator for iPhone I get an EDT Violation on creation of a PointsLayer object. It still processes the response correctly, is this something to be concerned about? I'm a complete newbie here, to codenameone and iPhone development.

PointsLayer pl = new PointsLayer(); 

steve nganga

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Jan 29, 2015, 5:17:41 AM1/29/15
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At what point are you instantiating the PointsLayer in your code?


On Thu, Jan 29, 2015 at 1:00 PM, Pete Knight <petec...@gmail.com> wrote:
Whilst running the MapsDemo on the simulator after building on Eclipse and running in the simulator for iPhone I get an EDT Violation on creation of a PointsLayer object. It still processes the response correctly, is this something to be concerned about? I'm a complete newbie here, to codenameone and iPhone development.

PointsLayer pl = new PointsLayer(); 

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Pete Knight

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Jan 29, 2015, 5:25:55 AM1/29/15
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Running the (unaltered) MapsDemo, its in the readResponse() its after the response has been parsed and read into a map

Image im = Image.createImage("/red_pin.png");

PointsLayer pl = new PointsLayer();

pl.setPointIcon(im);


On Thursday, January 29, 2015 at 10:17:41 AM UTC, ngosti2000 wrote:
At what point are you instantiating the PointsLayer in your code?

On Thu, Jan 29, 2015 at 1:00 PM, Pete Knight <petec...@gmail.com> wrote:
Whilst running the MapsDemo on the simulator after building on Eclipse and running in the simulator for iPhone I get an EDT Violation on creation of a PointsLayer object. It still processes the response correctly, is this something to be concerned about? I'm a complete newbie here, to codenameone and iPhone development.

PointsLayer pl = new PointsLayer(); 

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steve nganga

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Jan 29, 2015, 7:38:26 AM1/29/15
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Interesting coz i have executed the demo successfully on my end without getting the EDT Violation error.
Maybe shai and Chen can assist

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Pete Knight

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Jan 29, 2015, 8:38:05 AM1/29/15
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Adding the stack trace:

com.codename1.impl.javase.JavaSEPort$EDTViolation: EDT Vi

olation Stack!


at com.codename1.impl.javase.JavaSEPort.checkEDT(JavaSEPort.java:385)

at com.codename1.impl.javase.JavaSEPort.createFont(JavaSEPort.java:3976)

at com.codename1.ui.Font.<init>(Font.java:139)

at com.codename1.ui.Font.createSystemFont(Font.java:303)

at com.codename1.maps.layers.PointsLayer.<init>(PointsLayer.java:45)

at com.codename1.demos.maps.MapsDemo$3.readResponse(MapsDemo.java:161)

at com.codename1.io.ConnectionRequest.performOperation(ConnectionRequest.java:4

29)

at com.codename1.io.NetworkManager$NetworkThread.run(NetworkManager.java:261)

at com.codename1.impl.CodenameOneThread.run(CodenameOneThread.java:176)




On Thursday, January 29, 2015 at 12:38:26 PM UTC, ngosti2000 wrote:
Interesting coz i have executed the demo successfully on my end without getting the EDT Violation error.
Maybe shai and Chen can assist
On Thu, Jan 29, 2015 at 1:25 PM, Pete Knight <petec...@gmail.com> wrote:
Running the (unaltered) MapsDemo, its in the readResponse() its after the response has been parsed and read into a map

Image im = Image.createImage("/red_pin.png");

PointsLayer pl = new PointsLayer();

pl.setPointIcon(im);


On Thursday, January 29, 2015 at 10:17:41 AM UTC, ngosti2000 wrote:
At what point are you instantiating the PointsLayer in your code?

On Thu, Jan 29, 2015 at 1:00 PM, Pete Knight <petec...@gmail.com> wrote:
Whilst running the MapsDemo on the simulator after building on Eclipse and running in the simulator for iPhone I get an EDT Violation on creation of a PointsLayer object. It still processes the response correctly, is this something to be concerned about? I'm a complete newbie here, to codenameone and iPhone development.

PointsLayer pl = new PointsLayer(); 

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Shai Almog

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Jan 29, 2015, 10:26:33 AM1/29/15
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The code of the map demo does seem to be violating the EDT by calling UI element from the network thread.
To learn more about the EDT you can read these:
http://www.codenameone.com/blog/callserially-the-edt-invokeandblock-part-1
http://www.codenameone.com/blog/callserially-the-edt-invokeandblock-part-2

Pete Knight

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Jan 29, 2015, 5:15:08 PM1/29/15
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Following your EDT tutorial I have now fixed this by moving the UI related code from the network thread's readResponse() into a separate method. 

Using callSerially() to access the EDT, it runs now without any violation:

 Display.getInstance().callSerially(new Runnable() {

        public void run() {

             doTheEDTUIStuff(im, list, map, mc, progress);

        }

 });


Shai Almog

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Jan 30, 2015, 2:00:08 AM1/30/15
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Yes, you can also override postResponse() in the connection request which is invoked on the EDT after the connection completes.

Pete Knight

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Jan 30, 2015, 2:13:11 AM1/30/15
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Much cleaner than the former solution - implemented and tested, thanks

@Override

protected void postResponse() {

    doTheEDTUIStuff(im, list, map, mc, progress);

}

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