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<H1>Re: [MUD-Dev] C&C and Event Rescheduling</H1>
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<LI><em>To</em>: <A HREF="mailto:mud-dev#null,net">mud-dev#null,net</A></LI>
<LI><em>Subject</em>: Re: [MUD-Dev] C&C and Event Rescheduling</LI>
<LI><em>From</em>: <A HREF="mailto:clawrenc#cup,hp.com">clawrenc#cup,hp.com</A></LI>
<LI><em>Date</em>: Mon, 11 Aug 97 13:40:18 -0700</LI>
<LI><em>Reply-to</em>: <A HREF="mailto:claw#null,net">claw#null,net</A></LI>
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<PRE>
In <<A HREF="msg00294.html">33DF968D.41C67EA6#iname,com</A>>, on 07/30/97
at 07:43 PM, Shawn Halpenny <malachai#iname,com> said:
>clawrenc#cup,hp.com wrote:
>>
>> In <<A HREF="msg00242.html">33D8DED4.41C67EA6#iname,com</A>>, on 07/25/97
>> at 10:15 AM, Shawn Halpenny <malachai#iname,com> said:
>>
>> >clawrenc#cup,hp.com wrote:
>> >> How do you handle broadcasting state changes to other objects?
>>
>> >Post an event to call the notification method on each interested
>> >object.
>>
>> How do you know who is interested? Where is that data maintained, and
>> how does it get there? Does the notification enclude what changed, or
>> just that there was a change?
>Object A that wants to know when object B changes asks B to tell A
>when B changes. B then saves a reference to A in the internal list
>of objects that want to know about changes to B (this list is
>maintained solely by B).
This is the model I use.
>Currently, my design states that the
>notification of change will also include what was changed in B.
I don't do this currently, tho I suspect I could as a side-effect of
moving all the primitives (attributes. methods etc) to their own
storage units.
>All this notification is only done once an watched object has
>successfully committed, otherwise failed commits would result in
>wrongful notification of change.
Correct.
>At the moment, I think the only entities that care about that
>internal list in B is B and the DB, though it may instead be up to
>the Executor (JCL's term--I'm haven't entirely hashed out that part
>of the design yet) to notify the objects in that list of changes to
>B.
For me the watch list is read by the executor as part of the C&C and
events are logged (one per object) to send the I_HAVE_CHANGED message
to each of the watchers.
>For the record, object methods appear the same to the DB as object
>attributes.
Ditto.
>Only the VM cares if the contents of an attribute actually
>represent an attribute or a method. None of this is gospel in my
>design yet, so I fully expect you to blast some holes in it :>
To prevent the case where Bubba reprograms step A of a logical
sequence, and then reprograms step B to match, which opens the
possibility for a Boffo to step in and execute step A before C is
properly changed (leaving him in a logically inconsistant state), I
will be having the function of an editor object being able to edit and
commit changes to multiple objects in one C&C.
--
J C Lawrence Internet: claw#null,net
(Contractor) Internet: coder#ibm,net
---------------(*) Internet: clawrenc#cup,hp.com
...Honorary Member Clan McFUD -- Teamer's Avenging Monolith...
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<ul><li>Thread context:
<BLOCKQUOTE><UL>
<LI><STRONG>Re: [MUD-Dev] C&C and Event Rescheduling</STRONG>, <EM>(continued)</EM>
<ul compact>
<ul compact>
<ul compact>
<ul compact>
<ul compact>
<LI><strong><A NAME="00235" HREF="msg00235.html">Re: [MUD-Dev] C&C and Event Rescheduling</A></strong>,
clawrenc <a href="mailto:clawrenc#cup,hp.com">clawrenc#cup,hp.com</a>, Fri 25 Jul 1997, 08:17 GMT
<UL>
<LI><strong><A NAME="00242" HREF="msg00242.html">Re: [MUD-Dev] C&C and Event Rescheduling</A></strong>,
Shawn Halpenny <a href="mailto:malachai#iname,com">malachai#iname,com</a>, Sat 26 Jul 1997, 00:14 GMT
<UL>
<LI><strong><A NAME="00278" HREF="msg00278.html">Re: [MUD-Dev] C&C and Event Rescheduling</A></strong>,
clawrenc <a href="mailto:clawrenc#cup,hp.com">clawrenc#cup,hp.com</a>, Wed 30 Jul 1997, 06:09 GMT
<UL>
<LI><strong><A NAME="00294" HREF="msg00294.html">Re: [MUD-Dev] C&C and Event Rescheduling</A></strong>,
Shawn Halpenny <a href="mailto:malachai#iname,com">malachai#iname,com</a>, Thu 31 Jul 1997, 02:32 GMT
<UL>
<LI><strong><A NAME="00466" HREF="msg00466.html">Re: [MUD-Dev] C&C and Event Rescheduling</A></strong>,
clawrenc <a href="mailto:clawrenc#cup,hp.com">clawrenc#cup,hp.com</a>, Mon 11 Aug 1997, 20:49 GMT
</LI>
</UL>
</LI>
</UL>
</LI>
</UL>
</LI>
</UL>
</LI>
</ul>
</ul>
</ul>
</ul>
<LI><strong><A NAME="00291" HREF="msg00291.html">C&C and Event Rescheduling</A></strong>,
Miroslav Silovic <a href="mailto:silovic#petra,zesoi.fer.hr">silovic#petra,zesoi.fer.hr</a>, Wed 30 Jul 1997, 22:35 GMT
</LI>
<LI><strong><A NAME="00312" HREF="msg00312.html">C&C and Event Rescheduling</A></strong>,
Miroslav Silovic <a href="mailto:silovic#mare,zesoi.fer.hr">silovic#mare,zesoi.fer.hr</a>, Thu 31 Jul 1997, 23:09 GMT
<UL>
<LI><strong><A NAME="00329" HREF="msg00329.html">Re: [MUD-Dev] C&C and Event Rescheduling</A></strong>,
clawrenc <a href="mailto:clawrenc#cup,hp.com">clawrenc#cup,hp.com</a>, Sat 02 Aug 1997, 06:21 GMT
<UL>
<LI><strong><A NAME="00331" HREF="msg00331.html">Re: [MUD-Dev] C&C and Event Rescheduling</A></strong>,
Miroslav Silovic <a href="mailto:silovic#petra,zesoi.fer.hr">silovic#petra,zesoi.fer.hr</a>, Sat 02 Aug 1997, 06:56 GMT
</LI>
</UL>
</LI>
</UL>
</LI>
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</LI>
</UL></BLOCKQUOTE>
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