[Geoserver-users] Java OGC Web Services Client SDK

Patel_Ronak_Avinash · June 17, 2009, 10:30pm

Justin,

Codewise, where do you guys already produce GeoRSS? I was thinking of
using Rome from java.net and its GeoRSS extensions:

http://wiki.java.net/bin/view/Javawsxml/GeoRSS
http://wiki.java.net/bin/view/Javawsxml/Rome

Do you mind if I bring in other dependencies? I don't know how the whole
approval process works here on that...

I would like to group the RSS code with the Catalog code or with the
rest of the RSS generation code...

-----Original Message-----
From: Justin Deoliveira [mailto:jdeolive@anonymised.com]
Sent: Tuesday, June 16, 2009 4:18 PM
To: Patel, Ronak Avinash (US SSA)
Cc: geoserver-users@lists.sourceforge.net
Subject: Re: [Geoserver-users] Java OGC Web Services Client SDK

Patel, Ronak Avinash (US SSA) wrote:

Right but the plumbing to invoke and register the listener and then

what

kind of URL scheme do we want to use....I would imagine that's

something

the Geoserver team would want some say in...also...

You mean the url schema for the feed? Yeah I guess have a couple of
options here. But I am thinking maybe something like:

http://localhost:8080/geoserver/rest/catalog.rss

Besides publishing the bounding box for coverages, which is pretty

much

what I need, do we want to expand this to features as well?

We could pretty easily i think. The GeoServer catalog model abstracts
the idea of a coverage and a feature type into a "resource". Every
resource has a bounding box so it would be no extra work.

I'm thinking I would also just publish the wms url of the layer out

the

GeoRSS feed so external services can just hit that url to pull the

exact

layer.

Good idea. Simply tagging the feed entry with an atom:link which points
back to the wms call should be relatively easy as well.

-----Original Message-----
From: Justin Deoliveira [mailto:jdeolive@anonymised.com]
Sent: Tuesday, June 16, 2009 3:39 PM
To: Patel, Ronak Avinash (US SSA)
Cc: geoserver-users@lists.sourceforge.net
Subject: Re: [Geoserver-users] Java OGC Web Services Client SDK

Well.. .there is the CatalogListener interface, which can be used to
listen to catalog events. However, on 1.7.x it will the tricky. The

way

things work is that when something in the catalog gets changed,
everything gets updated. So tracking what changed is hard. I guess

your

listener could maintain an internal list, to see what changed on an
event, but it would be a pain.

On trunk however, the events are granular, so you only get an event

for

what changed.

In both cases, once your listener knows what changed, it would be
relatively easy to simply write the result to out a rss feed.

-Justin

Patel, Ronak Avinash (US SSA) wrote:

Thanks Justin...as is usual with me I found the answer right after I
posted to the mailing list...

I'm going to try to write that GeoRSS feed for changes to the wms/wfs
catalogs so interested clients can learn of changes to the catalog
(add/remove layers and layer groups).

I'm trying to determine an estimate on that now so I can determine
whether I should go down this path. Otherwise, I'll have to generate

a

custom GeoRSS external to geoserver using a cron job...grrrr

-----Original Message-----
From: Justin Deoliveira [mailto:jdeolive@anonymised.com]
Sent: Tuesday, June 16, 2009 2:37 PM
To: Patel, Ronak Avinash (US SSA)
Cc: geoserver-users@lists.sourceforge.net
Subject: Re: [Geoserver-users] Java OGC Web Services Client SDK

GeoTools has both a WFS and WMS client:

http://docs.codehaus.org/display/GEOTDOC/WMS
http://docs.codehaus.org/display/GEOTDOC/WFS+Plugin

-Justin

Patel, Ronak Avinash (US SSA) wrote:

Hi all,

I had a quick question where I was wondering if anyone knew of a

Java

OGC Web Services Client SDK. I figure this has been done to death

and

must exist out there.

Can anyone point me to an SDK I can use in my program to extract

layers,

features, etc. from Geoserver?

Thanks!!

Ronak Patel

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Justin Deoliveira
OpenGeo - http://opengeo.org
Enterprise support for open source geospatial.