concurrency

> Hello List and Janko Mivšek,
>
> thank you for making the framework available.
>
> How to deal with concurrency?
> Example: the adressbook from  http://www.aidaweb.si/tutorial
> Many user can start editing the same dataset without information the dataset is already in use. And without a kind of recordlocking.
>
> Are there "helpermethods" in the framework? (and if so, which?)
> Any pointer where I should read up on the topic.

> Hi Paul, welcome to the mailing list!
>
> S, [hidden email] pi?e:
> > Hello List and Janko Miv?ek,
> >
> > thank you for making the framework available.
> >
> > How to deal with concurrency?
> > Example: the adressbook from  http://www.aidaweb.si/tutorial
> > Many user can start editing the same dataset without information the
> dataset is already in use. And without a kind of recordlocking.
> >
> > Are there "helpermethods" in the framework? (and if so, which?)
> > Any pointer where I should read up on the topic.
>
> If you load Scribo as well, there is a locking support in class
> Document, implemented in subclases WikiPage and presentation class
> WikiPageApp.
>
> In short: when page is edited, an Ajax polling in background keeps
> server informing that this page is editing. If someone else try to edit
> it, a warning is shown with a name of the editor. By Ajax polling again
> this warning disappears when original editor finish editing.
>
> Here are classes and methods to look at:
>
>   Document category 'locking':
>
> aidaIsLockedOn: aSession,
> aidaLockOn: aSession,
> aidaUnlock, ...
>
>   WikiPageApp category 'access rights':
>
> setLock
> regrantLock
>   isLockedBySomeoneElse
>
>   WikiPageApp
>
> viewEdit "to see how it is used"
> lockElement  "to refresh document lock periodically"
> viewWait "to wait until page is unlocked"
>
>
> You can load Scribo simply by this script:
>
>   Gofer new
>     squeaksource: 'MetacelloRepository';
>     package: 'ConfigurationOfScribo';
>     load.
>
>  (Smalltalk at: #ConfigurationOfScribo) load.
>
>
> Hope this helps
> Janko
>
> --
> Janko Miv?ek
> Aida/Web
> Smalltalk Web Application Server
> http://www.aidaweb.si
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