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From Naresh Bhatia <bhat...@comcast.net>
Subject Re: Using OpenCMIS as a mediator service
Date Sat, 28 May 2011 03:04:28 GMT
Thanks so much Florian. This is exactly the advise that I was looking for.

Regards,

Naresh Bhatia


On Fri, May 27, 2011 at 8:11 PM, Florian Müller <
florian.mueller@alfresco.com> wrote:

> Hi Naresh,
>
> Re 1:
> This is a perfectly valid application of OpenCMIS.
>
> Re 2:
> From an OpenCMIS perspective getObject() and getObjectByPath() are not that
> different. But for many repositories getObjectByPath() is a more expensive
> operation. If you can access the objects by id, you should do that.
>
> Re 3+4:
> You should reuse the Session object (per user) wherever you can. The
> performance can be dramatically better if you do that. The easiest way is to
> store the Session object in a HTTP session.
> OpenCMIS is thread-safe. So it can be used in parallel requests.
>
>
> Cheers,
>
> Florian
>
>
>
>
> On 27/05/2011 10:34, Naresh Bhatia wrote:
>
>> I am new to OpenCMIS and wanted this group's guidance for an application
>> that I am developing - a simple mobile application to allow people at my
>> company to browse various CMIS repositories.
>>
>> Being a simple file browser, I want to hide the complexities of CMIS from
>> the mobile app. So I would like to create a mediator service which talks
>> to
>> CMIS repositories using OpenCMIS, but in turn exposes a much simpler (path
>> based) interface to the mobile applications.
>>
>> For example:
>>
>> getChildren(String repositoryName, String path)
>>
>> would return a simple JSON based list of the folder's children:
>>
>> {
>>
>>   "entry" : {
>>
>>     "type" : "document",
>>
>>     "author" : "nbhatia",
>>
>>     "title" : "cmis-article.pdf",
>>
>>     "summary" : "Examples using CMIS, Abdera,&amp; Chemistry",
>>
>>     "content" : {
>>
>>       "type" : "application/pdf",
>>
>>       "src" : "http://<host>:<port>/.../content.pdf"
>>
>>     },
>>
>>     "published" : "2011-05-25T17:15:36.740Z",
>>
>>     "updated" : "2011-05-25T17:15:40.045Z",
>>
>>     "version" : 0.0
>>
>>   },
>>
>>   "entry" : {
>>
>>     ...
>>
>>   },
>>
>>   "entry" : {
>>
>>     ...
>>
>>   }
>>
>> }
>>
>>
>> 1. Does anyone see a major issue with this approach?
>>
>> 2. Since I will be using Session.getObjectByPath() in my mediator service,
>> is there a performance concern with this call (as opposed to getting the
>> object directly using its object id)
>>
>> 3. If the calls from mobile devices are stateless (starting with a fresh
>> path every time), should I still be using the Session API? Am I loosing
>> the
>> befit of caches etc?
>>
>> 4. Or should I consider maintaining state for each mobile device with an
>> associated OpenCMIS Session?
>>
>> Any help you can give will is much appreciated. Thanks in advance for your
>> time!
>>
>> Naresh Bhatia
>>
>>
>

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