thread safe implementations

[Chris]

Umberto, I would like to have a java interface to Mapserver.  Have you used
Geoserver?  They have a java implementation of a WMS.  I'm not sure what the
performance is like, but it would be nice to have a similar interface to
Mapserver.

Chris

-----Original Message-----
From: Umberto Nicoletti [mailto:unicoletti at PROMETEO.IT]
Sent: Thursday, November 04, 2004 2:52 AM
To: MAPSERVER-USERS at LISTS.UMN.EDU
Subject: Re: [UMN_MAPSERVER-USERS] thread safe implementations


Dan,
if by creating a java implementation you mean writing a web app to deliver
the
same (or  subset) of the functionality the cgi does, then I am writing one.

I think I am one of the few java mapscript users around :-)

Regards,
umberto

Quoting Sean Gillies <sgillies at FRII.COM>:

> Dan,
>
> It's not clear to me what you mean by creating a java implementation
> on your own.  Implementation of what?  Do you mean a programming API
> like the php mapscript module?
>
> If this is what you mean, you should look at the Java stuff that
> you can generate using SWIG.  In mapserver versions 4.2.4+ and in
> the 4.4.0 beta1 there is a Java makefile under mapserver/mapscript/java.
> It seems to work, but as I've said -- I'm not a Java user and so am
> not beating on the Java mapscript module heavily enough or often
> enough to say anything about its readiness.
>
> Sean
>
> On Nov 3, 2004, at 10:37 AM, Dan Barron wrote:
>
> > Hmmm - I was really hoping someone had done (or attempted) a java
> > implementation - I'm not versed in Zope or Python.  Well, I guess I
> > will
> > attempt to create a java implementation on my own.
> >
> > Thanks Sean.
> >
> > Dan
> >
> > At 01:10 PM 11/2/2004, Sean Gillies wrote:
> >> On Nov 2, 2004, at 10:47 AM, Dan Barron wrote:
> >>
> >>> Hello,
> >>>
> >>> Just curious what the current consensus and recommendations are for
> >>> creating a thread safe front end or wrapper for mapserver in either
> >>> php or
> >>> java? I'm assuming that mapserver is still not thread safe - that
> >>> correct?
> >>>
> >>> Thanks!
> >>>
> >>> Dan
> >>
> >> Dan,
> >>
> >> I caught and fixed three sources of potential threading problems
> >> before
> >> the 4.2.4 release and these fixes will also be in 4.4.0.  I think
> >> we're
> >> close to thread safety, but it's hard to say without more testing.  As
> >> far as I know, my ZMapServer (Zope + Python mapscript) software is the
> >> only thing out there that is using MapServer in a multi-threaded
> >> environment.  It works, but is not a complete proof of thread safety.
> >>
> >> There remains much work to be done to in improving MapServer's
> >> threaded performance.  The single lexer for parsing mapfiles and
> >> class expressions is a bottleneck that will be addressed in the
> >> future.
> >>
> >> cheers,
> >> Sean
> >>
> >> --
> >> Sean Gillies
> >> sgillies at frii dot com
> >> http://users.frii.com/sgillies
> >
>