RE: Is this the defects of Javaswarm? the swarm kernel neglect new added agents!

[Hu, Jianjun]

Then I am wondering why when I started the simulation and during running,
when I add new agents,
these agents were just  neglected by the swarm kernel.
        tadpoleLayer.agentList.add(newTadpole );
Do you have any java example that you add or remove agents during a
simulation?

thanks

Jianjun







-----Original Message-----
From: address@hidden
[mailto:address@hidden Behalf Of Paul E Johnson
Sent: Wednesday, June 26, 2002 11:51 AM
To: address@hidden
Subject: Re: Is this the defects of Javaswarm? the swarm kernel neglect new
added agents!


In Objective-C, I have no trouble with createActionForEach usages when
the agent list changes. Have  you tried any diagnostics to make sure
your list of agents does actually change?  I bet that is where the
problem is.  If you remove an agent from a list, and drop that agent,
then if swarm tries to do something to that agent, it should find a nil
and the whole sim should abort.

Now, I'm remembering a problem from Swarm-2.1 java and maybe it would
account for your trouble. I discovered this in January, 2001, and I
think the word "yell" is in my swarm-support email trial. IT has since
been fixed, but here was the deal. If you had a createActionForEach and
it was supposed to go through a list, it would quit as soon as it found
a nil and it did not issue a warning message.  I found several lists
partially processed.  But if you are using a current Swarm, that does
not happen.

Hu, Jianjun wrote:
> Thanks Paul.
>
> I think one solution maybe swarm kernel exposes its iterator to the user,
> then we can use this iterator to update the agent list.
> and then the swarm kernel can track the changes of agents.
>
> Jianjun Hu
>

--
Paul E. Johnson                       email: address@hidden
Dept. of Political Science            http://lark.cc.ku.edu/~pauljohn
1541 Lilac Lane, Rm 504
University of Kansas                  Office: (785) 864-9086
Lawrence, Kansas 66044-3177           FAX: (785) 864-5700


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