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From Ingo Wolfmayr <ingo.wolfm...@wolfix.at>
Subject AW: Scale image (Content Management)
Date Fri, 16 Jan 2015 08:52:46 GMT
Hi Jacques,

yes. I am already testing my version - so from technical point of view it works. The question
is if this is something that could be interesting for the content management part of the project
as it is completely unrelated to products (as Image Management relies on a productId).

Used for news overviews, gallery thumbnails, image previews ...

Ingo


-----Ursprüngliche Nachricht-----
Von: Jacques Le Roux [mailto:jacques.le.roux@les7arts.com] 
Gesendet: Freitag, 16. Jänner 2015 06:44
An: user@ofbiz.apache.org
Betreff: Re: Scale image (Content Management)

Did you have a look at http://demo-trunk-ofbiz.apache.org/catalog/control/Imagemanagement
?

Jacques

Le 15/01/2015 11:07, Ingo Wolfmayr a écrit :
> Hi all,
>
> I would like to share my thoughts on what I am currently working on with the hope to
get  some input to have it done 100% Ofbiz style. Maybe this feature could be interesting
for the project:
>
> Goal: resize uploaded images to predefined scales (Content Management) 
> File representation:
>
> Original ../ofbiz/runtime/uploads/11111111/10001.jpeg
> Small ../ofbiz/runtime/uploads/11111111/SMALL/10001.jpeg
> ...
>
> Reason: improve load time of page by reducing image size
>
> How to:
>
> Config:
> - Define scales
> - Turn feature on & off.
>
> Create Service "createScalesFromUploadedImage" and add code to do the resize job.
>
> Insert service in:
> .. applications\content\servicedef
>
>      <service name="createContentFromUploadedFile" engine="group" transaction-timeout="300">
>          <description>Accepts file upload, creates DataResource and Content records.</description>
>          <!-- uses createContent internally; additonal permission(s) not necessary
-->
>          <group>
>              <invoke name="createDataResource" parameters="preserve" result-to-context="true"/>
>              <invoke name="attachUploadToDataResource" parameters="preserve" result-to-context="true"/>
>              <invoke name="createContentFromDataResource" parameters="preserve" result-to-context="true"/>
>             <invoke name="createScalesFromUploadedImage"/>
>          </group>
>      </service>
>      <service name="updateContentAndUploadedFile" engine="group" transaction-timeout="300">
>          <description>Accepts file upload, updates DataResource and Content records.</description>
>          <group>
>              <invoke name="updateDataResource" parameters="preserve" result-to-context="true"/>
>              <invoke name="attachUploadToDataResource" parameters="preserve" result-to-context="true"/>
>              <invoke name="updateContent" parameters="preserve" result-to-context="true"/>
> 			<invoke name="createScalesFromUploadedImage"/>
>          </group>
>      </service>
>
>
> This works already using CMS. Creating an image by using "create content" seems to call
different methods to upload the image. I still have to check why.
>
> Adding an "ImageWorker" class to access the scaled images with methods 
> like " getImageScaleFromDataResource, getImageScaleFromContent ". I do 
> not thing they should be added to the database as dataresources as 
> they are just another representation of the original image. If the 
> image scale is not available it will be created on fly. If the 
> original image is there, there is no reason to result in 404. Service 
> to scale the image is called when
> - uploading,
> - updating,
> - retrieved and file is not available.
>
> Workflow to stream the image:
>
> Call stream like: "stream?contentId=10001?scale=small"
>
> "stream" --> DataEvents.serveObjectData
>
> Add:
> String imageScale = (String) httpParams.get("scale"); .
> .
> resourceData = ImageWorker. getImageScaleFromDataResource 
> (dataResource, https, webSiteId, locale, contextRoot, scale, false);
>
> Then the image gets streamed.
>
> I would appreciate any thoughts.
>
> Ingo
>
>
>
>
>
>
>   
>
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>

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