Hi folks,
our application contains several layers that we expose in the LayersPanel, which
the user is allowed to rearrange at will. It also contains 3 "invisible" layers,
which must sit on top of the exposed layers in the layer stack. We start by
adding these 3 layers on top, which is fine. But, in the setLayers() method in
our class that implements LayerListener, I have 3 moveLayer() calls to ensure
that, if someone moves an exposed layer to the top, the 3 invisible layers get
moved back on top of all the layers. eg.:
public void setLayers(LayerEvent e) {
...
switch(type) {
case LayerEvent.ALL:
layerHandler.moveLayer(flashLayer, 0);
layerHandler.moveLayer(highlightLayer, 1);
layerHandler.moveLayer(virtualLayer, 2);
...
}
These moveLayers() calls seem to be causing
a deadlock in the LayerHandler setLayers() method (see thread dump below).
The deadlock occurs in the first line of LayerHandler.setLayers() (line 488):
allLayers = layers;
Is there an accepted way to safely rearrange layers from within on the app's
setLayers() method?
Many thanks for any help, Bill Barber
-------------------------------------------------------------------------------
OpenMap(tm) Version 4.6.3
Copyright (C) BBNT Solutions LLC. All rights reserved.
See
http://openmap.bbn.com/ for details.
Full thread dump Java HotSpot(TM) Client VM (1.5.0_06-b05 mixed mode, sharing):
"Thread-11" prio=1 tid=0x0861c358 nid=0x16f4 waiting for monitor entry
[0xaaed7000..0xaaed8030]
at com.bbn.openmap.LayerHandler.setLayers(LayerHandler.java:488)
- waiting to lock <0x5cc8c1c0> (a com.bbn.openmap.LayerHandler)
at com.bbn.openmap.LayerHandler.moveLayer(LayerHandler.java:645)
at userinterface.vis2d.Map.setLayers(Map.java:495)
at com.bbn.openmap.event.LayerSupport.fireLayer(LayerSupport.java:91)
- locked <0x5cc8c230> (a com.bbn.openmap.event.LayerSupport)
at
com.bbn.openmap.event.LayerSupport$SetLayerRunnable.doIt(LayerSupport.java:176)
at
com.bbn.openmap.event.LayerSupport$SetLayerRunnable.run(LayerSupport.java:165)
at java.lang.Thread.run(Thread.java:595)
"TimerQueue" daemon prio=1 tid=0x085dcad0 nid=0x16ef in Object.wait()
[0xaa4d6000..0xaa4d6eb0]
at java.lang.Object.wait(Native Method)
- waiting on <0x5d046e20> (a javax.swing.TimerQueue)
at javax.swing.TimerQueue.run(TimerQueue.java:233)
- locked <0x5d046e20> (a javax.swing.TimerQueue)
at java.lang.Thread.run(Thread.java:595)
--
[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 Mon Aug 21 2006 - 18:33:50 EDT