Ok clear !
That way I'll only have as many WebMapServer Objects in my JVM as there are WMS Services available/published on the (in this case ArcIMS) server.
Thanks again and the way you and Jody are responding, really do help me in building up the confidence to use this software.
I am just a J2EE/Portal developer/designer that needs to integrate a compleet new kind of content (new to me of course !)
It is fun, really !
A nice change from accessing SAP/PeopleSoft/BusinessObjects, Reuters StockExchange or Web Content Management systems :-)
Just for my own interest are Google Maps and Windows Life Local using the same standards as the GIS opensource community ?
Regards
Michel
| Richard Gould <[EMAIL PROTECTED]>
07/11/2006 10:08 PM |
|
I think it would probably be better to cache it on a higher level. Every
time you create a new WebMapServer, it contacts the server. If you are
creating lots of WebMapServer objects that all represent the same
server, then you are generating redundant calls to that server.
Re-using the same object will prevent this. And as far as I know, there
are no downsides to doing it that way. (IE: The WebMapServer object does
not retain much state - just the information about how it communicates
with the server)
Cheers,
Richard
Michel Jonker wrote:
>
> Hi Richard,
>
> Thanks for your answer.
> Just to make sure that I understand you correctly:
> It would be wisest to contruct a new WebMapServer in every service
> method (servlet thread) and not to try to gain performance (caching it)
> by making it available on a higher level (application context, instance
> variable, static :-P ..... ) ? Or would that come with a large penalty ?
>
> Thanks again !
>
> Michel Jonker
>
>
>
>
> *Richard Gould <[EMAIL PROTECTED]>*
>
> 07/11/2006 09:51 PM
>
>
> To
> Michel Jonker <[EMAIL PROTECTED]>
> cc
> Jody Garnett <[EMAIL PROTECTED]>,
> [email protected]
> Subject
> Re: [Geotools-gt2-users] Question about multithreading, serverside use
> of WMS client code
>
>
>
>
>
>
>
>
> Hi Michel,
>
> I designed the WMS client so that the application using it can use its
> own method of threading, rather than having the module impose one
> itself. So the entire WMS module is single-threaded, but you should be
> able to use it in a multi-threaded context.
>
> The important parts where it performs I/O are in the constructor, when
> it talks to the server initially, and during all of the issueRequest()
> methods. If you need to change some of this behaviour, please let me
> know and I will work with you to sort it out.
>
> Cheers,
>
> Richard
>
> Jody Garnett wrote:
> > Michel Jonker wrote:
> >> Hello,
> >>
> >> I am new to this toolkit and I have design decission to make.
> >>
> >> I want to start of with this sample :
> >> http://geotools.codehaus.org/Web+Map+Server+Tutorial
> >>
> >> And put this code in the service methode of a servlet/portlet and not
> >> in a desktop client application.
> > That is cool, you will find the WMS specification often used in server
> > applications (for reporting) or in web applications
> > such as MapBuilder.
> >> We are trying to achieve a multi-tier solution where the WMS service
> >> is being consumed by a Portal Server.
> >>
> >> Question: with servlets/portlet you introduce multithreading, are
> >> there any limitations/pitfalls that I should be aware off if I want to
> >> start using this component ?
> > It is a straight up webservice, standard base so you can switch between
> > MapServer and GeoServer as needed (performance vs advanced styling)
> >> Or should I have read more and is it actually designed for the
> >> purposes that I have stated above ?
> > I think you are set, you should be able to access a wide range of
> content.
> >
> >
> > Have fun,
> > Jody
> >
> >
> >
> > -------------------------------------------------------------------------
> > Using Tomcat but need to do more? Need to support web services, security?
> > Get stuff done quickly with pre-integrated technology to make your
> job easier
> > Download IBM WebSphere Application Server v.1.0.1 based on Apache
> Geronimo
> > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> > _______________________________________________
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> > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
>
>
>
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