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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hello Aaron,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>You are correct in assuming this is an
older version. The only difference between the old and new version is that HypothesisSub.getAddedCollection().iterator();
has been changed to HypothesisSub.iterator(); to gather all objects; added or
changed.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I am guessing the only way to resolve this
now is to create a timer and compare previous objects to new objects. (probably
via their GUID)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>If you have any potentially useful code or
suggestions, please send them my way. Otherwise I’ll just proceed with
the timer.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Thank you <b><span style='font-weight:
bold'>VERY VERY</span></b> much for helping me with this plugin.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>James <o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 color=black face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight:bold'>From:</span></font></b><font
size=2 color=black face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:windowtext'> Aaron Helsinger [mailto:ahelsing@bbn.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, February 02, 2007
7:05 AM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">James
Livingood</st1:PersonName><br>
<b><span style='font-weight:bold'>Cc:</span></b> 'Todd Wright'; '<st1:PersonName
w:st="on">cougaar-developers@cougaar.org</st1:PersonName>'<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: Execute works on
getAddedCollection but not getChangedCollection</span></font><font color=black><span
style='color:windowtext'><o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><br>
<br>
<st1:PersonName w:st="on">James Livingood</st1:PersonName> wrote: <o:p></o:p></span></font></p>
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</xml><![endif]--></u1:SmartTagType>Hello Aaron and Todd,<u1:p></u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:windowtext'><u1:p> </u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:windowtext'>If the other plugin doesn’t run
publishChange(), is there still a way to detect changes to the objects?</span></font><o:p></o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'>If no one calls
publishChange, then no one knows that the object has changed. The purpose of
the publishChange call is to notify plugins that something has changed -- which
causes them to wake up, and their execute method to be called. This is also
what puts the object on the ChangedCollection.<br>
If you do not call publishChange, then the object will not be on the
ChangedCollection -- and if it is old, it also wont be on the AddedCollection.
So your plugin wouldnt see it. Additionally, Subscriptions are how your plugin
knows that it has work to do and should run. So if no one calls publishChange
on the object, then your plugin's subscriptions will think there is nothing new
for your plugin to do, so the plugin wont even run!<br>
<br>
Even if your plugin were periodically running anyway (a different subscription,
or an Alarm), <br>
the only way in this case to tell that the object has changed would be to
compare it with some previous memory of what the object looked like. <br>
<br>
Correct Cougaar behavior is to call publishChange on any object previously
publishAdded to the Blackboard when you change it.<br>
<br>
The full Java file that you sent doesnt look at the ChangedCollection, so I
assume this is a previous version.<br>
<br>
Aaron<o:p></o:p></span></font></p>
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