HELP AND TIPS FOR LOCK-MECHANISM

> Hello,
> I hope this is the right place to post my problem...
>
> I have a small app (TOMCAT/ORBEON/EXIST ) to create an online  
> dictionary. User (admin-users) can create/edit/delete entries...
>
> My problem is, that I need a good lock-mechanism to prevent double  
> acces to files that are "to edit".
>
> Right row the id of the entry that is clicked "edit" is written into  
> a 2edit.xml file in eXist and a xquery checks if it´s already in use  
> by the same user...
>
> If the same user does already edit this file (I did this because  
> maybe working in different browsers...) there was an error...
>
> If a different user tries to edit the same file an error occurs....
>
> But I think what I want is a little bit different and maybe someone  
> has some experience and can help me...
>
> 1) The user should  be able to edit more than one entry at the same  
> time...maybe he wants to open more than one browser...
> 2) If he clicks on one file he does already edit, he should just be  
> redirected to the file he wants to edit...
> 3) Different users should not be able to edit a file if it is in use.
>
>
> Right now when I click on edit a edit.xpl gives the entryID to my  
> edit.xq that should does the checks and return the entry as an  
> instance to the edit.xhtml .
>
>
> Please, if someone has a good idea or thinks that the way I want to  
> do it is not good..feel free to tell me a better way!
>
> THX
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