Hi Yorgos,
Thanks for posting what you found. I hadn't heard anything about
your problem before, and couldn't reproduce it on my system (looks
like a Windows JVM problem).
Regards,
Don
On Mar 20, 2006, at 9:48 AM, yorgos strakosa wrote:
> It looks like this is a Java platform bug!
> It`s described here:
> http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4912903
> and it says that:
> "The jar file gets downloaded for every ImageIcon(URL) constructor"
>
> If you have a statement like this:
>
> URLConnection.setDefaultUseCaches(false);
>
> in your code than what`s decribed above will happen.
>
> One of the workarounds is to simply say:
>
> URLConnection.setDefaultUseCaches(true);
>
> It worked for me, so I just put it here in case
> this happens to anyone else.
>
> Yorgos.
>
> On 3/17/06, yorgos strakosa <gstrak_at_gmail.com> wrote:
>> Hi!
>> I have a question about using OpenMap components in an applet.
>>
>> First of all, I am using a digitally signed applet in order to
>> have access
>> to the local (user) machine. I use the local machine as a cache
>> for the
>> map (shape) files. To make this work the Environment is really an
>> application.
>> Allthough the applet is cached locally with all the needed classes,
>> during applet initialization the OpenMap components cause (e.g.
>> InformationDelegator, NavigatePanel e.t.c.) the download of the
>> applet
>> jar from the server, several times (40-50) before
>> the whole thing is rendered on the screen.
>> (It can be accessed from here: http://isl.cs.unipi.gr/seismoportal/)
>>
>> Do you have any idea, why is this happening?
>>
>> To be more specific here are some debugging messages:
>>
>> For InformationDelegator I get this:
>>
>> Java Plug-in console
>> =====================
>> ComponentFactory.create: com.bbn.openmap.InformationDelegator
>> - got class for com.bbn.openmap.InformationDelegator
>> - created class arguments [null]
>> - got constructor
>> InformationDelegator.initInfoWidgets
>> network: Connecting http://127.0.0.1/seismoportal/sSeismoSurfer.jar
>> with proxy=DIRECT
>> network: Connecting http://127.0.0.1/seismoportal/sSeismoSurfer.jar
>> with cookie "JSESSIONID=BCF60756511E360C65355829BC8BE0DE"
>> network: Connecting http://127.0.0.1/seismoportal/sSeismoSurfer.jar
>> with proxy=DIRECT
>> network: Connecting http://127.0.0.1/seismoportal/sSeismoSurfer.jar
>> with cookie "JSESSIONID=BCF60756511E360C65355829BC8BE0DE"
>> network: Connecting http://127.0.0.1/seismoportal/sSeismoSurfer.jar
>> with proxy=DIRECT
>> network: Connecting http://127.0.0.1/seismoportal/sSeismoSurfer.jar
>> with cookie "JSESSIONID=BCF60756511E360C65355829BC8BE0DE"
>> - got object
>> setting properties with prefix "informationDelegator"
>> - set properties
>> ComponentFactory: [com.bbn.openmap.InformationDelegator(3)] created
>>
>> Tomcat log
>> ==========
>> 127.0.0.1 - guest [17/Mar/2006:15:33:49 +0200] "GET
>> /seismoportal/sSeismoSurfer.jar HTTP/1.1" 200 1509263
>> 127.0.0.1 - guest [17/Mar/2006:15:33:49 +0200] "GET
>> /seismoportal/sSeismoSurfer.jar HTTP/1.1" 200 1509263
>> 127.0.0.1 - guest [17/Mar/2006:15:33:50 +0200] "GET
>> /seismoportal/sSeismoSurfer.jar HTTP/1.1" 200 1509263
>>
>> I don`t understand why InformationDelegator.initInfoWidgets causes
>> three consecutive applet downloads...
>>
>> Looking the source I noticed that it makes an instance of
>> StatusLightPanel
>> which uses code like this
>>
>> StatusLightPanel.class.getResource("grey.gif")
>>
>> to load the images. Could something like this cause an applet
>> download?
>> If this is so, how can I avoid it?
>>
>>
>> Thanks a lot for your time,
>> Yorgos
>>
>
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Received on Wed Mar 22 2006 - 10:11:07 EST