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<p class=MsoNormal>How does the semantics of message routing work (involving
resources)?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I have come up with the following (for a message sent to <a
href="mailto:joe@server.com">joe@server.com</a>):<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Is the destination on this server?<o:p></o:p></p>
<p class=MsoListParagraph style='margin-left:72.0pt;text-indent:-18.0pt;
mso-list:l0 level2 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>a.<span
style='font:7.0pt "Times New Roman"'> </span></span><![endif]>No
-> Open or use S2S connection and route the packet there.<o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Does it have a resource?<o:p></o:p></p>
<p class=MsoListParagraph style='margin-left:72.0pt;text-indent:-18.0pt;
mso-list:l0 level2 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>a.<span
style='font:7.0pt "Times New Roman"'> </span></span><![endif]>No
-> Find the lowest resource and route.<o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='mso-list:Ignore'>3.<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Is the resource online?<o:p></o:p></p>
<p class=MsoListParagraph style='margin-left:72.0pt;text-indent:-18.0pt;
mso-list:l0 level2 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>a.<span
style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Yes
-> Route it to that connection.<o:p></o:p></p>
<p class=MsoListParagraph style='margin-left:72.0pt;text-indent:-18.0pt;
mso-list:l0 level2 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>b.<span
style='font:7.0pt "Times New Roman"'> </span></span><![endif]>No
-> Is the user online?<o:p></o:p></p>
<p class=MsoListParagraph style='margin-left:108.0pt;text-indent:-108.0pt;
mso-text-indent-alt:-9.0pt;mso-list:l0 level3 lfo1'><![if !supportLists]><span
style='mso-list:Ignore'><span style='font:7.0pt "Times New Roman"'>
</span>i.<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Yes -> *<b>What to do here?</b>* (Assuming that <a
href="mailto:joe@server.com">joe@server.com</a> or <a
href="mailto:joe@server.com/resource">joe@server.com/resource</a> is online)<o:p></o:p></p>
<p class=MsoListParagraph style='margin-left:108.0pt;text-indent:-108.0pt;
mso-text-indent-alt:-9.0pt;mso-list:l0 level3 lfo1'><![if !supportLists]><span
style='mso-list:Ignore'><span style='font:7.0pt "Times New Roman"'>
</span>ii.<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>No -> Store it in DB for later.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I know this has come up before, but what about
duplicate destinations? If a *<b>nuclear reactor is overheating</b>* packet is
sent to <a href="mailto:joe@server.com">joe@server.com</a> and he has three
resources:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><a href="mailto:joe@server.com/mobile">joe@server.com/mobile</a>
(0)<o:p></o:p></p>
<p class=MsoNormal><a href="mailto:joe@server.com/pc">joe@server.com/pc</a> (1)<o:p></o:p></p>
<p class=MsoNormal><a href="mailto:joe@server.com/allfail">joe@server.com/allfail</a>
(0)<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thus now he has identical resources in case a message is
sent to his mobile, and it needs urgent action (but he isn’t online). Can’t
messages be routed to all resources with identical priorities?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks for your time.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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