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From Florian Müller <f...@apache.org>
Subject Re: Question about Paging - numItems
Date Fri, 19 Aug 2016 15:27:56 GMT
Hi Sascha,

You found a bug in the Workbench!
It's now fixed.

Thanks for reporting it!


- Florian


> Hi Florian,
> 
> thx for the info.
> 
> Yes, on server side I only return 5 hits except for the last page
> where I only return 1 (total numItems = 16).
> 
> I am just a bit confused about the display in the Chemistry Workbench
> QueryFrame:
> When I set skipCount to 0 with maxHits = 5 it properly only shows up 5
> hits.
> But when I set skipCount to 5 it fetches all the pages up to the end
> and shows 11 hits
> 
> In the code of the QueryFrame the ItemIterable (variable “page")
> then automatically fetches the next page when getting to the end of
> one page.
> 
>  results = model.query(text, searchAllVersionsCheckBox.isSelected(),
> maxHits);
>  ...
>  ItemIterable<QueryResult> page = results.getPage(maxHits);
> 
> for (QueryResult qr : page)
> {
> // with skipCount > 0 here at every 5th loop the next page is
> automatically fetched from server
> ...
> }
> ...
> 
> When I set numItems like Alfresco Demo Server does then it is
> displayed properly (Alfresco seems to set numItems to 5 for first
> page, 10 for second page and so on …).
> But this setting of numItems is wrong when I understood you correctly.
> 
> 
> So I am just wondering if I do sth. wrong or this is an issue
> elsewhere?
> 
> tia
> 
> Cheers
> Sascha
> 
> 		P.
> 		+84 166 456-3331 [1]
> 
> 		SHOMEIER@APOLLON.DE
> 
> turning technology.
> 
> apollon GmbH+Co. KG
> MAXIMILIANSTR. 104 [2]
> 75172 PFORZHEIM / GERMANY [2]
> WWW.APOLLON.DE [3]
> 
> Geschäftsführer: Eugen Müller (Vors.), Ingrid Müller (stv. Vors.),
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> 
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> 
>> On Aug 19, 2016, at 5:32 PM, Florian Müller <fmui@apache.org>
>> wrote:
>> 
>> Hi Sascha,
>> 
>> You are right, totalNumItems should stay the same for each page
>> (assuming that the data in the repository doesn't change).
>> Some repositories don't always return a value for totalNumItems, but
>> that's OK from the spec point of view.
>> 
>> If the client sets maxItems to 5 the server MUST NOT return more
>> than 5 hits. It may return fewer hits (because there are no more
>> hits or because of any server constraints), but never more.
>> 
>> OpenCMIS doesn't have a TCK test for that, yet. It may be worth
>> adding one...
>> 
>> - Florian
>> 
>>> Hi all,
>>> I am currently struggling with the paging of a query result set.
>>> Did I understand it correctly that “numItems” should contain
>>> the whole
>>> number of items (if the repository knows about it)?
>>> So for example a repository only contains 16 documents all from
>>> type
>>> cmis:document and we have a query like:
>>> “SELECT cmis:name FROM cmis:document ORDER BY cmis:name”
>>> When we set the page size (maxItems) to 5 and the skipCount to 0
>>> then
>>> I assume that the server should pass the first 5 results (the
>>> first
>>> page) and set the numItems to 16.
>>> When we want the second page we set skipCount to 5 (and leave
>>> maxItems
>>> = 5) and still numItems is 16.
>>> Third page with a skipCount of 10 and still numItems = 16. And so
>>> on…
>>> Is this correct?
>>> Cause when I do it this way on the server the QueryFrame in the
>>> CMIS
>>> Workbench gives me 11 hits for skipCount = 5 and maxItems = 5 (the
>>> ItemIterable in the loop just goes through all pages).
>>> I compared with Alfresco CMIS Demo server. For this the Workbench
>>> QueryFrame properly only shows up 5 hits for every page but it
>>> seems
>>> the Alfresco Server does set “numItems” to the summed up
>>> number of
>>> items until current page (numItems = 5 for skipCount = 0, numItems
>>> =
>>> 10 for skipCount = 5).
>>> I strongly assume Alfresco is right here.
>>> tia
>>> Cheers
>>> Sascha
>>> P. +84 166 456-3331
>>> shomeier@apollon.de
>>> turning technology.
>>> apollon GmbH+Co. KG
>>> Maximilianstr. 104
>>> 75172 Pforzheim / Germany
>>> www.apollon.de
>>> Geschäftsführer: Eugen Müller (Vors.), Ingrid Müller (stv.
>>> Vors.),
>>> Peter Schellhorn, Norbert Weckerle
>>> Amtsgericht Mannheim HRA 500441
>>> PhG: Meyle+Müller Verwaltungs-GmbH HRB 500138
>>> apollon auf der dmexco Köln 14./15. September 2016
>>> Halle 6.1 / Stand A-064
>>> Schnell kostenlose Tickets downloaden – nur vom 18.7. bis
>>> 15.8.2016
> 
> 
> 
> Links:
> ------
> [1] tel:+84%20166%20456-3331
> [2]
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> [3] http://www.apollon.de
> [4] http://dmexco.de/tickets/

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