Thanks for the stack trace. The changes you made to avoid the second
error probably caused the first. I seriously doubt your other thread
has anything to do with the this problem. It's more likely that the
interruption is caused when a new projection hits the layer while it's
reading the .ssx file. The .shp layer reads were trapped, but the .ssx
ones weren't.
I've modified the ShapeLayer to set the OMGraphicList to null if an
InterruptedIOException occurs.
Thanks for the info,
Don
On Oct 6, 2004, at 1:01 PM, Andrew Hnatiw wrote:
>
> Here's the stack backtrace for that error:
>
> java.lang.NullPointerException
> at
> com.bbn.openmap.layer.shape.ShapeLayer.prepare(ShapeLayer.java:372)
> at
> com.bbn.openmap.layer.policy.StandardRenderPolicy.prepare(StandardRende
> rPolicy.java:68)
> at
> com.bbn.openmap.layer.OMGraphicHandlerLayer$LayerWorker.construct(OMGra
> phicHandlerLayer.java:590)
> at com.bbn.openmap.util.SwingWorker$2.run(SwingWorker.java:107)
> at java.lang.Thread.run(Thread.java:536)
>
> It sometimes happens on startup (I think...), though it usually
> happens when I send a bunch of new graphics through
> the network to the plugin I wrote. I was getting another error at
> some point where it would complain that the thread
> reading in the Political Boundaries Layer data from a file was being
> interrupted - I'd like to say that they're probably related.
> To get rid of that I just modified BinaryBufferedFile to not throw
> that exception. it worked for a while, and now I get the above
> error.
>
> Here is the original error that I was suppressing to get the above
> error:
>
> java.io.InterruptedIOException
> at java.io.RandomAccessFile.readBytes(Native Method)
> at java.io.RandomAccessFile.read(RandomAccessFile.java:303)
> at
> com.bbn.openmap.io.FileInputReader.read(FileInputReader.java:209)
> at com.bbn.openmap.io.BinaryFile.read(BinaryFile.java:456)
> at
> com.bbn.openmap.io.BinaryBufferedFile.assertSize(BinaryBufferedFile.jav
> a:162)
> at
> com.bbn.openmap.io.BinaryBufferedFile.readInteger(BinaryBufferedFile.ja
> va:428)
> at
> com.bbn.openmap.layer.shape.SpatialIndex.locateRecords(SpatialIndex.jav
> a:288)
> at
> com.bbn.openmap.layer.shape.ShapeLayer.prepare(ShapeLayer.java:368)
> at
> com.bbn.openmap.layer.policy.StandardRenderPolicy.prepare(StandardRende
> rPolicy.java:68)
> at
> com.bbn.openmap.layer.OMGraphicHandlerLayer$LayerWorker.construct(OMGra
> phicHandlerLayer.java:590)
> at com.bbn.openmap.util.SwingWorker$2.run(SwingWorker.java:107)
> at java.lang.Thread.run(Thread.java:536)
>
> All I can guess is that when I send data over the network the thread
> that is reading from the file in FileInputReader gets
> interrupted by my thread reading in from the network. How can I keep
> this from happening?
>
> Thanks,
> Andrew Hnatiw
>
>
> Don Dietrick <dietrick_at_bbn.com> wrote on 10/06/2004 12:15:51 PM:
>
> >
> > On Oct 6, 2004, at 11:18 AM, Andrew Hnatiw wrote:
> >
> > >
> > > When I run my code on a Solaris box I get an error window that
> pops up
> > > and says
> > >
> > > "Political Boundaries|LayerWorker.construct():
> > > java.lang.NullPointerException"
> > >
> > > and the backtrace says that it occurred at ShapeLayer.java:372.
> This
> > > appears to be where it grabs
> > > data from a file... I only get the error every once in a while,
> and
> > > when I do the political layer doesn't get
> > > drawn. If I cause the screen to redraw for any reason it will
> usually
> > > draw itself fine afterwards.
> > >
> > > Does anybody know how to fix this, or at least how to get rid of
> the
> > > error window that pops up? I am giving
> > > a demo of my work next week and would love to not have error
> messages
> > > popping up.
> >
> > You can comment out the call to fireRequestMessage() at the bottom
> of
> > the OMGraphicHandler's LayerWorker.construct() method.
> >
> > Have you got a stack trace of the null pointer exception?
> >
> > - Don
> >
> > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> > Don Dietrick, dietrick_at_bbn.com
> > BBN Technologies, Cambridge, MA
> > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> >
>
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Don Dietrick, dietrick_at_bbn.com
BBN Technologies, Cambridge, MA
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
--
[To unsubscribe to this list send an email to "majdart_at_bbn.com"
with the following text in the BODY of the message "unsubscribe openmap-users"]
Received on Wed Oct 06 2004 - 15:47:56 EDT