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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>: Fri, 12 Sep 97 14:47:16 -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="msg00640.html">199708171721.MAA14449#dfw-ix11,ix.netcom.com</A>>, on 08/17/97
at 10:22 AM, "Jon A. Lambert" <jlsysinc#ix,netcom.com> said:
>Perhaps there is another way? Someone requested (Shawn?) that I post
>an example of a mud language which handled transactions. So here be
>it:
>object Dragon class BigMutha {
> var fatigue_points;
> var location;
> method event Move(var direction) {
> if Dragonden.ExitStatus(direction) == OPEN {
> Dragonden.RemoveObj(this);
> Dragonden.GetExitLocation().AddObject(this);
> FatigueMe(5);
> EvaluateSituation(10);
> }
> else
> SendOut("The Door is Closed");
> EvaluateSituation(10);
> throw #EVENTFAIL;
> }
> }
> method FatigueMe(var points) {
> fatigue_points = fatigue_points - points;
> if fatigue_points < 0 {
> fatigue_points = 0;
> SendOut("Your too tired to move");
> EvaluateSituation(10);
> throw #EVENTFAIL;
> }
> }
> method event EvaluateSituation() {
> ...Insert some clever code here
> which might at some point select...
> Move(20,"east");
> }
>}
>The important points are the different types of methods. Event
>methods form a logically consistent transaction and may call any
>number of methods of any type. Commit of the transaction is done at
>the end of the event's method. Also when
>EvaluateSituation() is called above a new event is logged and it is
>not executed immediately. The next statement is.
>Event methods have as their first implicit parameter a timing value.
>In the above case Move(20,"east") will occur in 20 tenths of a second
>(I hope).
>Comments?
A greviously long quote, but needed I think.
What determines if a method call will be made as a nested transaction,
or as a seperate event? The problem here is taht a method/transaction
which may normally be considered logically atomic (move character to
next room for example), may have logical dependencies in a specific
event context (transactions which depend on correct order of
processing of nested transactions).
eg:
"Move" is an event method as above.
The code reads:
Move (east);
FillBucket (water);
Move (east);
EmptyBucket (Fire);
Without each Move only being done and compleated prior to the next
calls, the fire may or may not get doused.
--
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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<li><strong><A NAME="01227" HREF="msg01227.html">Re: [MUD-Dev] C&C and Event Rescheduling</A></strong>
<ul compact><li><em>From:</em> "Jon A. Lambert" <jlsysinc#ix,netcom.com></li></ul>
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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="00687" HREF="msg00687.html">Re: [MUD-Dev] C&C and Event Rescheduling</A></strong>,
Adam Wiggins <a href="mailto:nightfall#user1,inficad.com">nightfall#user1,inficad.com</a>, Wed 20 Aug 1997, 04:02 GMT
<UL>
<LI><strong><A NAME="00749" HREF="msg00749.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 27 Aug 1997, 00:24 GMT
</LI>
</UL>
</LI>
</ul>
</ul>
</ul>
</ul>
<LI><strong><A NAME="00630" HREF="msg00630.html">[MUD-Dev] C&C and Event Rescheduling</A></strong>,
Jon A. Lambert <a href="mailto:jlsysinc#ix23,ix.netcom.com">jlsysinc#ix23,ix.netcom.com</a>, Sun 17 Aug 1997, 06:21 GMT
</LI>
<LI><strong><A NAME="00640" HREF="msg00640.html">[MUD-Dev] C&C and Event Rescheduling</A></strong>,
Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Sun 17 Aug 1997, 17:21 GMT
<UL>
<LI><strong><A NAME="01201" HREF="msg01201.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 12 Sep 1997, 23:01 GMT
<UL>
<LI><strong><A NAME="01227" HREF="msg01227.html">Re: [MUD-Dev] C&C and Event Rescheduling</A></strong>,
Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Tue 16 Sep 1997, 16:22 GMT
</LI>
</UL>
</LI>
</UL>
</LI>
</ul>
</LI>
<LI><strong><A NAME="00482" HREF="msg00482.html">Re: [MUD-Dev] New to this mailing list</A></strong>,
Chris Gray <a href="mailto:cg#ami-cg,GraySage.Edmonton.AB.CA">cg#ami-cg,GraySage.Edmonton.AB.CA</a>, Tue 12 Aug 1997, 06:06 GMT
<UL>
<LI><strong><A NAME="00487" HREF="msg00487.html">Re: [MUD-Dev] New to this mailing list</A></strong>,
Matt Chatterley <a href="mailto:root#mpc,dyn.ml.org">root#mpc,dyn.ml.org</a>, Tue 12 Aug 1997, 16:41 GMT
</LI>
<LI><strong><A NAME="00488" HREF="msg00488.html">Re: [MUD-Dev] New to this mailing list</A></strong>,
Richard Woolcock <a href="mailto:KaVir#dial,pipex.com">KaVir#dial,pipex.com</a>, Tue 12 Aug 1997, 17:18 GMT
</LI>
</UL>
</LI>
</UL></BLOCKQUOTE>
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