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<p class=MsoNormal><font size=2 color="#993366" face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:#993366'>I agree. Sounds good.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#993366" face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:#993366'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#993366" face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:#993366'>Tom<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#993366" face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:#993366'><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'> Michael Sweet
[mailto:msweet@apple.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, October 08, 2009
16:57<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">tom.hastings@alum.mit.edu</st1:PersonName><br>
<b><span style='font-weight:bold'>Cc:</span></b> ipp@pwg.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [IPP] ISSUE: on
Cancel-Jobs: what if some jobs are in cancelable state and some are not?</span></font><o:p></o:p></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'>On Oct 8, 2009, at 4:43 PM, Tom Hastings wrote:<o:p></o:p></span></font></p>
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<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite><u1:smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName">
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<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>I think we have agreement. Since the
Cancel-Jobs is now all or nothing, the Printer MUST return an error code if any
of the jobs could NOT be canceled, even if all the rest could be. <u1:p></u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><u1:p> </u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>So if any are not the user’s, then return:</span></font><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'> </span></font><a name="_Toc518405512"><span style='layout-grid-mode:
line'>client-error-not-authorized (0x0403)</span></a><u1:p></u1:p><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>But if all are the user’s, but some are
not in a state to be canceled, return: </span></font><a name="_Toc518405513"><span
style='layout-grid-mode:line'>client-error-not-possible (0x0404)</span></a><u1:p></u1:p><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><u1:p> </u1:p><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>If the user requests “my-jobs” = ‘true’,
but there are no jobs that can be canceled, return: </span></font><a
name="_Toc518405515"><span style='layout-grid-mode:line'>client-error-not-found
(0x0406)</span></a><o:p></o:p></p>
<u1:p></u1:p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;layout-grid-mode:line'><u1:p> </u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue;layout-grid-mode:line'>If the user omits
“job-ids” and omits “my-jobs” (or supplies the default “my-jobs” = ‘false’),
return: </span></font><span style='layout-grid-mode:line'>client-error-not-authorized
(0x0403)</span><font size=2 color=blue face=Arial><span style='font-size:10.0pt;
font-family:Arial;color:blue;layout-grid-mode:line'>. But what if the
only jobs that are cancelable are the user’s? That could successfully
cancel all jobs as long as they all belonged to the user. An
implementation could to this easily, by simply checking each job that is
cancelable and as soon as it finds one that doesn’t belong to the requesting
user, it stops checking and returns the </span></font><span style='layout-grid-mode:
line'>client-error-not-authorized (0x0403)</span><font size=2 color=blue
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:blue;
layout-grid-mode:line'>; if all jobs belong to the user, it cancels all of them
and returns: </span></font><a name="_Toc518405504"><span style='layout-grid-mode:
line'>successful-ok (0x0000)</span></a><span style='layout-grid-mode:line'>,
OK?</span><o:p></o:p></p>
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</blockquote>
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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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</u1:smarttagtype>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Sounds reasonable.<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>
<u1:smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName">
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<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue;layout-grid-mode:line'>If the operator
requests all jobs be canceled by omitting both “job-ids” and “my-jobs” (or
supplied “my-jobs” = ‘false’), and there are no jobs that can be canceled, then
return</span></font><span style='layout-grid-mode:line'> client-error-not-found
(0x0406)</span><o:p></o:p></p>
<u1:p></u1:p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><u1:p> </u1:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>I don’t see a good way to indicate which
jobs are the offending jobs. Returning the “job-ids” in the Unsupported
attributes group with the values removed that could have been canceled is about
as close as I can get, but that is for a successfully completed operation which
returns the status code: </span></font><a name="_Toc518405506"><span
style='layout-grid-mode:line'>successful-ok-conflicting-attributes (0x0002)</span></a><font
size=2 color=blue face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:blue'>. </span></font><o:p></o:p></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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</u1:smarttagtype>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>According to 3.1.7 of RFC 2911, any operation can include an
unsupported group in its response, regardless of the status code; there are
handful of status codes that require an unsupported group be present...<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'>So, I think we are OK returning the job-ids that are causing the error
in the unsupported group of the response.<o:p></o:p></span></font></p>
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<p class=MsoNormal><span class=apple-style-span><font size=1 color=navy
face=Arial><span style='font-size:9.0pt;font-family:Arial;color:navy'> </span></font></span><o:p></o:p></p>
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<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite><u1:smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName">
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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;background:red'>ISSUE</span></font><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy;background:yellow'>: OK that the Printer doesn’t try to return which
jobs are the ones causing the rejection? Instead, OK just to indicate
that the client can do a Get-Jobs (before or after a Cancel-Jobs request) with
a “job-ids” supplied and get the status and ownership of each of the jobs to
help the user?</span></font><o:p></o:p></p>
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</blockquote>
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<u1:p></u1: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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</u1:smarttagtype>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I don't like that approach since it introduces a race condition - the
offending job might change state between Get-Jobs, Cancel-Jobs, and Get-Jobs,
so better for the printer to say what the problem is instead.<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'>That said, we should only include the job-ids attribute in the response
if it was supplied in the request, since otherwise we are only canceling jobs
that can be canceled at that moment.<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=4 color=black face=Monaco><span style='font-size:
13.5pt;font-family:Monaco;color:black'>___________________________________________________<o:p></o:p></span></font></p>
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<div>
<p class=MsoNormal><font size=4 color=black face=Monaco><span style='font-size:
13.5pt;font-family:Monaco;color:black'>Michael Sweet, Senior Printing System
Engineer<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=4 color=black face=Monaco><span style='font-size:
13.5pt;font-family:Monaco;color:black'><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'></span><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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