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<H1>Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</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] World Persistence, flat files v/s DB v/s ??</LI>
<LI><em>From</em>: Matt Chatterley <<A HREF="mailto:matt#mpc,dyn.ml.org">matt#mpc,dyn.ml.org</A>></LI>
<LI><em>Date</em>: Sun, 22 Mar 1998 19:18:47 +0000 (GMT)</LI>
<LI><em>Reply-To</em>: <A HREF="mailto:neddy#itl,net">neddy#itl,net</A></LI>
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<PRE>
On Sun, 22 Mar 1998, Chris Gray wrote:
> [Ben Greear:]
[Snip]
> :Also, as a java server, I don't think I can do a select on incomming
> :data. I think a thread for every player is a bit much...any suggestions
> :here?
>
> I have just started into the socket programming stuff of the current Java
> book I'm reading, but I just went and did some scanning. The technique
> he suggests for a server is to create some fixed number of threads, and
> re-use those threads throughout the lifetime of the server. He says that
> some Java implementations do not garbage collect threads at all, so having
> one per connection can result in an eventual crash due to lack of memory.
> Ick. Given the lack of a 'select' or 'poll' method in Java, the choices
> are quite limited. Double ick.
It is my understanding that (at least, according to the 1.1.x
specifications), a Thread is terminated when its stop() method is called.
Of course, some Java implementations may be buggy. :)
Reusing threads is probably desirable, by the way, especially if less work
will be done to re-use an existant thread than to create a new one, and
not hard to do.
Consider a model where you have a resizeable array (see the Vector class)
of Threads. You also maintain a list of available threads so you do not
have to recalulate it, and follow a procedure akin to:
New connection is made to the server:
Check list of available threads.
If null: extend the Vector and add a new thread to handle the
connection.
If not null: take the 'top' thread and re-assign it.
A connection closes:
Add that thread to the list of available threads.
Suspend and 'reset' the thread.
Seems interesting anyway. :)
--
Regards,
-Matt Chatterley
Spod: <A HREF="http://user.super.net.uk/~neddy/spod/spod.html">http://user.super.net.uk/~neddy/spod/spod.html</A>
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<li><strong><A NAME="00885" HREF="msg00885.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>
<ul compact><li><em>From:</em> Vadim Tkachenko <vt#freehold,crocodile.org></li></ul>
<li><strong><A NAME="00852" HREF="msg00852.html">World Persistence, flat files v/s DB v/s ??</A></strong>
<ul compact><li><em>From:</em> s001gmu#nova,wright.edu</li></ul>
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<UL><LI><EM>From:</EM> cg#ami-cg,GraySage.Edmonton.AB.CA (Chris Gray)</LI></UL></LI>
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<ul><li>Thread context:
<BLOCKQUOTE><UL>
<LI><STRONG>Re: [MUD-Dev] Jukebox</STRONG>, <EM>(continued)</EM>
<ul compact>
<LI><strong><A NAME="00854" HREF="msg00854.html">Re: [MUD-Dev] Jukebox</A></strong>,
J C Lawrence <a href="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</a>, Mon 23 Mar 1998, 20:34 GMT
<UL>
<LI><strong><A NAME="00868" HREF="msg00868.html">Re: [MUD-Dev] Jukebox</A></strong>,
Vadim Tkachenko <a href="mailto:vt#freehold,crocodile.org">vt#freehold,crocodile.org</a>, Tue 24 Mar 1998, 03:25 GMT
</LI>
</UL>
</LI>
</ul>
</LI>
<LI><strong><A NAME="00819" HREF="msg00819.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>,
Chris Gray <a href="mailto:cg#ami-cg,GraySage.Edmonton.AB.CA">cg#ami-cg,GraySage.Edmonton.AB.CA</a>, Sun 22 Mar 1998, 18:21 GMT
<UL>
<LI><strong><A NAME="00822" HREF="msg00822.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>,
Greg Munt <a href="mailto:greg#uni-corn,demon.co.uk">greg#uni-corn,demon.co.uk</a>, Sun 22 Mar 1998, 19:02 GMT
</LI>
<LI><strong><A NAME="00823" HREF="msg00823.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>,
Matt Chatterley <a href="mailto:matt#mpc,dyn.ml.org">matt#mpc,dyn.ml.org</a>, Sun 22 Mar 1998, 19:19 GMT
<UL>
<LI><strong><A NAME="00852" HREF="msg00852.html">World Persistence, flat files v/s DB v/s ??</A></strong>,
s001gmu <a href="mailto:s001gmu#nova,wright.edu">s001gmu#nova,wright.edu</a>, Mon 23 Mar 1998, 19:51 GMT
<UL>
<LI><strong><A NAME="00884" HREF="msg00884.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>,
Vadim Tkachenko <a href="mailto:vt#freehold,crocodile.org">vt#freehold,crocodile.org</a>, Wed 25 Mar 1998, 05:23 GMT
</LI>
</UL>
</LI>
<LI><strong><A NAME="00885" HREF="msg00885.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>,
Vadim Tkachenko <a href="mailto:vt#freehold,crocodile.org">vt#freehold,crocodile.org</a>, Wed 25 Mar 1998, 05:26 GMT
<UL>
<LI><strong><A NAME="00894" HREF="msg00894.html">Re: [MUD-Dev] World Persistence, flat files v/s DB v/s ??</A></strong>,
Matt Chatterley <a href="mailto:matt#mpc,dyn.ml.org">matt#mpc,dyn.ml.org</a>, Wed 25 Mar 1998, 08:47 GMT
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