Re: Socket holding pattern

From: Uri Guttman (uri_at_stemsystems.com)
Date: 09/09/04 

Date: Thu, 09 Sep 2004 13:49:29 GMT

>>>>> "AS" == Anno Siegel <anno4000@lublin.zrz.tu-berlin.de> writes:

  AS> Another possibility is to open the relevant file handles (sockets)
  AS> so that they are immune to close-on-exec. (Set $^F to something
  AS> huge while they are opened). The old server process would have
  AS> to tell the new one which file descriptors are in use, so the new
  AS> one can take them over. Besides the compatibility issues already
  AS> mentioned, there may be synchronization problems when both processes
  AS> hold file handles to active connections.

it can be much harder than that too. most servers of this type (long
lived connections) keep state about each connection so that has to be
stored in a place away from the socket itself. if that data is in
objects and you reload that class, who knows what will happen to those
objects? the newly loaded code would always need to know it is fresh and
reload those objects and such. this idea of reloading code on the fly
and keeping connections is not for the feint of heart nor the weak in
coding and design skills.

and i agree, since this is only for a mud, who cares? kick all the
players and let them reconnect.

uri 

-- 
Uri Guttman  ------  uri@stemsystems.com  -------- http://www.stemsystems.com
--Perl Consulting, Stem Development, Systems Architecture, Design and Coding-
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