[Geoserver-devel] Writing Custom getCapabilities

GeoServer GeoServer Developer
1

As part of an ongoing project I am attempting to provide a customized
getCapabilities response via the DispatcherCallback framework. As such, I
am creating a new Response object which overrides the write method in
order to write my own custom content. The problem I am running into,
however, is that I cannot find an efficient way to get access to the WMS
configuration details stored in the WMS class. Is there a callable method
I can use to gain access? Alternatively, is my approach (create a new
Response object that overrides "write") the wrong way to go when creating
a custom getCapabilities?

Thanks,
David Marks

2

On Wed, 24 Dec 2014 08:26:30 PM Marks, David wrote:

As part of an ongoing project I am attempting to provide a customized
getCapabilities response via the DispatcherCallback framework. As such, I
am creating a new Response object which overrides the write method in
order to write my own custom content.

Is this intended to provide compatibility with a client that doesn't use the
new CF conventions?

The problem I am running into,
however, is that I cannot find an efficient way to get access to the WMS
configuration details stored in the WMS class. Is there a callable method
I can use to gain access?

Don't think there is a method, but you can just use dependency injection to
get a WMS passed into your constructor.

Alternatively, is my approach (create a new
Response object that overrides "write") the wrong way to go when creating
a custom getCapabilities?

Don't know, but interested in the answer. Right now I'm just patching
geoserver.

Brad

3

On Wed, Dec 24, 2014 at 9:26 PM, Marks, David <David.Marks@anonymised.com>
wrote:

As part of an ongoing project I am attempting to provide a customized
getCapabilities response via the DispatcherCallback framework. As such, I
am creating a new Response object which overrides the write method in
order to write my own custom content. The problem I am running into,
however, is that I cannot find an efficient way to get access to the WMS
configuration details stored in the WMS class. Is there a callable method
I can use to gain access? Alternatively, is my approach (create a new
Response object that overrides "write") the wrong way to go when creating
a custom getCapabilities?

The approach is fine I believe, but it would be great to know what the use
case for a different
response is, maybe it could be solved by adding some extension points to
the standard
writer, like we did to allow the inspire plugin to add extended
capabilities into it

Cheers
Andrea

--

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Please, notice that GeoSolutions will be closed for seasonal holidays
from December the 24th to January the 6th

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Technical Lead

GeoSolutions S.A.S.
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4

The use case is to generate getCapabilities resposnes using Apache Velocity templates, to give a greater degree of control over the formatting and contents of the getCapabilities. We have a starting template prepared and filling it in seems straight forward enough, but I'm just having trouble gaining access to the WMS object.

Thanks,

David Marks

________________________________
From: andrea.aime@anonymised.com <andrea.aime@anonymised.com> on behalf of Andrea Aime <andrea.aime@anonymised.com>
Sent: Sunday, December 28, 2014 3:53 AM
To: Marks, David
Cc: Geoserver-devel
Subject: Re: [Geoserver-devel] Writing Custom getCapabilities

On Wed, Dec 24, 2014 at 9:26 PM, Marks, David <David.Marks@anonymised.com<mailto:David.Marks@anonymised.com>> wrote:
As part of an ongoing project I am attempting to provide a customized
getCapabilities response via the DispatcherCallback framework. As such, I
am creating a new Response object which overrides the write method in
order to write my own custom content. The problem I am running into,
however, is that I cannot find an efficient way to get access to the WMS
configuration details stored in the WMS class. Is there a callable method
I can use to gain access? Alternatively, is my approach (create a new
Response object that overrides "write") the wrong way to go when creating
a custom getCapabilities?

The approach is fine I believe, but it would be great to know what the use case for a different
response is, maybe it could be solved by adding some extension points to the standard
writer, like we did to allow the inspire plugin to add extended capabilities into it

Cheers
Andrea

--

GeoServer Professional Services from the experts! Visit
http://goo.gl/NWWaa2 for more information.

Please, notice that GeoSolutions will be closed for seasonal holidays
from December the 24th to January the 6th

Ing. Andrea Aime
@geowolf
Technical Lead

GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549

http://www.geo-solutions.it/&gt;
http://twitter.com/geosolutions_it

AVVERTENZE AI SENSI DEL D.Lgs. 196/2003

Le informazioni contenute in questo messaggio di posta elettronica e/o nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il loro utilizzo ? consentito esclusivamente al destinatario del messaggio, per le finalit? indicate nel messaggio stesso. Qualora riceviate questo messaggio senza esserne il destinatario, Vi preghiamo cortesemente di darcene notizia via e-mail e di procedere alla distruzione del messaggio stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso, divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalit? diverse, costituisce comportamento contrario ai principi dettati dal D.Lgs. 196/2003.

The information in this message and/or attachments, is intended solely for the attention and use of the named addressee(s) and may be confidential or proprietary in nature or covered by the provisions of privacy act (Legislative Decree June, 30 2003, no.196 - Italy's New Data Protection Code).Any use not in accord with its purpose, any disclosure, reproduction, copying, distribution, or either dissemination, either whole or partial, is strictly forbidden except previous formal approval of the named addressee(s). If you are not the intended recipient, please contact immediately the sender by telephone, fax or e-mail and delete the information in this message that has been received in error. The sender does not give any warranty or accept liability as the content, accuracy or completeness of sent messages and accepts no responsibility for changes made after they were sent or for other risks which arise as a result of e-mail transmission, viruses, etc.

-------------------------------------------------------

5

On Tue, Dec 30, 2014 at 6:24 PM, Marks, David <David.Marks@anonymised.com>
wrote:

The use case is to generate getCapabilities resposnes using Apache
Velocity templates, to give a greater degree of control over the formatting
and contents of the getCapabilities. We have a starting template prepared
and filling it in seems straight forward enough, but I'm just having
trouble gaining access to the WMS object.

Hum... that's more of a technical solution in my view, but what is the real
driver?

I've seen people change the caps document because:
* They were trying to limit the layers visible (better done implementing a
ResourceAccessManager imho)
* Add vendor parameters supported somehow by custom stores that would not
be otherwise advertised
* Control the list of available projection on a per user basis
* Generally speaking, add extra bits that are part of the capabilities
document, but cannot be configured in GeoServer

Anyways, for that kind of technical solutions overriding the response in a
DispatcherCallback is most likely
the best approach

Cheers
Andrea

--

GeoServer Professional Services from the experts! Visit
http://goo.gl/NWWaa2 for more information.

Please, notice that GeoSolutions will be closed for seasonal holidays
from December the 24th to January the 6th

Ing. Andrea Aime
@geowolf
Technical Lead

GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549

http://www.geo-solutions.it
http://twitter.com/geosolutions_it

*AVVERTENZE AI SENSI DEL D.Lgs. 196/2003*

Le informazioni contenute in questo messaggio di posta elettronica e/o
nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il
loro utilizzo è consentito esclusivamente al destinatario del messaggio,
per le finalità indicate nel messaggio stesso. Qualora riceviate questo
messaggio senza esserne il destinatario, Vi preghiamo cortesemente di
darcene notizia via e-mail e di procedere alla distruzione del messaggio
stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso,
divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od
utilizzarlo per finalità diverse, costituisce comportamento contrario ai
principi dettati dal D.Lgs. 196/2003.

The information in this message and/or attachments, is intended solely for
the attention and use of the named addressee(s) and may be confidential or
proprietary in nature or covered by the provisions of privacy act
(Legislative Decree June, 30 2003, no.196 - Italy's New Data Protection
Code).Any use not in accord with its purpose, any disclosure, reproduction,
copying, distribution, or either dissemination, either whole or partial, is
strictly forbidden except previous formal approval of the named
addressee(s). If you are not the intended recipient, please contact
immediately the sender by telephone, fax or e-mail and delete the
information in this message that has been received in error. The sender
does not give any warranty or accept liability as the content, accuracy or
completeness of sent messages and accepts no responsibility for changes
made after they were sent or for other risks which arise as a result of
e-mail transmission, viruses, etc.

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