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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'>Hi Todd,<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'>Thanks for the pointers. <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 saw the optimistic locking on the
descriptor beLockKey I’m assuming that by “Last one wins” you
mean no locking?<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'>To be clear you are letting the basic
object be read from a read only session then you are allowing changes in value
holders, and then recomputing changes and applying them at commit time? Is
that right?<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'>Ron<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>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Todd Blanchard
[mailto:tblanchard@mac.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, November 20, 2006
7:08 PM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">Ron@USMedRec.com</st1:PersonName>;
<st1:PersonName w:st="on">The Squeak Enterprise Aubergines Server - general
discussion.</st1:PersonName><br>
<b><span style='font-weight:bold'>Cc:</span></b>
glorp-development@lists.sourceforge.net<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [<st1:City w:st="on">Seaside</st1:City>]
Glorp and <st1:City w:st="on"><st1:place w:st="on">Seaside</st1:place></st1:City></span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I'm about to get good at this as I'm porting an omnibase application to
use glorp. Some stuff I can tell you:<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>1) I tend to keep one shared read-only glorp session for most browsing.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>2) I give each form its own glorp session and let the user
fiddle. If they make it through to commit, great. But then I toss
it and they get the readonly session again.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>3) There is no root object. Glorp is a relational database mapper
- you query using blocks. ie<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>user := glorpSession readOneOf: User where: [:ea | ea login = self
login].<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>4) You only have to register one object - all others get saved through
reachability and differences are calculated at commit time.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>5) Everything in the session that has been registered or is reachable
from registered objects gets committed within a session. A
session/unitOfWork (to me they're like the same thing) is sort of its own
transaction context. You can save them in any order, but depending on how
you set up locking attributes, you'll either get 'last one wins' or locking
exceptions raised.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>-Todd Blanchard<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On Nov 20, 2006, at 11:32 AM, Ron Teitelbaum wrote:<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<br>
<o:p></o:p></span></font></p>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><O:SMARTTAGTYPE namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"><O:SMARTTAGTYPE namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place">All,<O:P></O:P></span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><O:P> </O:P></span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>I’ve
been hooking up classes to Glorp for a <ST1:CITY u1:st="on"><ST1:PLACE u1:st="on"><st1:City
w:st="on"><st1:place w:st="on">Seaside</ST1:PLACE></ST1:CITY></st1:place></st1:City>
application. I’ve been reading what people have written about doing
this and it appears that there is no support for multiple unit’s of work.
The suggestion I found was copying model changes during commit
time. Is this the current state of things? Do I need to serialize
commits, and manage changes myself at commit time for seaside
applications? I also saw a suggestion to have one unit of work, is this
even feasible? Can we register more then one root object and use the
commit features of glorp to keep track of changes to simulate multiple units of
work?<O:P></O:P></span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><O:P> </O:P></span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Thanks for
your help!<O:P></O:P></span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><O:P> </O:P></span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Ron
Teitelbaum<O:P></O:P></span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'></O:SMARTTAGTYPE></O:SMARTTAGTYPE>_______________________________________________<o:p></o:p></span></font></p>
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<div>
<p class=MsoNormal><st1:City w:st="on"><st1:place w:st="on"><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>Seaside</span></font></st1:place></st1:City>
mailing list<o:p></o:p></p>
</div>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><a href="mailto:Seaside@lists.squeakfoundation.org">Seaside@lists.squeakfoundation.org</a><o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><a
href="http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside">http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside</a><o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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