Hi Stephane,
The reason for not using the WO caching mechanism was, that I'm maintaining a
application which has "pageWithName" methods ad infinitum and this method does
always create a new instance of a page (please do correct me, if this is not
true), which is not the behaviour I want it to have (I want it to check the
cache first).
Thank you for responding,
Andri
>>> Stephane Guyot <stephane.guyo...@wanadoo.fr> schrieb am Mittwoch, 14.
>>> Oktober
2009 um 09:16 in Nachricht <6e311acc-81e0-40a4-8894-2d2c5a00f...@wanadoo.fr>:
> Andri,
>
> I don't what exactly you want do, but have a look on API Session :
> restorePageForConextID, savePage, savePageInPermanentCache.
> You can start to override this API and just log, to understand how
> WebObjects works with pages and contextIDs.
>
> HTH,
> Stephane
>
>
> Le 13 oct. 09 à 10:29, Andri vonAllmen a écrit :
>
>>
>> Dear List,
>>
>> in an Applications Session, a NSMutableDictionary object is used for
>> "caching" pages. Everytime the "pageWithName" method is called, the
>> dictionary is queried in order to determine if the requested page does
>> already exist, if true the existing page is returned, else a new
>> one is
>> generated and stored in the dictionary. This is made in
>> Application.java
>> by overriding the "pageWithName" method:
>>
>> public WOComponent pageWithName(String aName, WOContext aContext) {
>> Object result = null;
>> if ( aContext.hasSession() ) result =
>> ((NSMutableDictionary)((Session)aContext.session()).cachedPages
>> ()).objectForKey(aName);
>> if ( result == null ) {
>> result = super.pageWithName(aName, aContext);
>> if ( aContext.hasSession() ) if ( aName != null )
>> ((NSMutableDictionary)((Session)aContext.session()).cachedPages
>> ()).setObjectForKey(result,
>> aName);
>> }
>> return (WOComponent)result;
>> }
>>
>> This works with one exception. Making changes on Enterprise Objects is
>> not possible in every case. Saving changes works, if always the same
>> object is changed but not if two different objects are changed
>> (changing
>> the first, saving the changes, then changing the second and saving the
>> changes). But if making changes on a object, saving it, and then
>> revert
>> the changes (to the same state as before changing it the first time),
>> making changes on other objects is possible.
>>
>> As mentioned in the WO API Reference, for pages being stored in a
>> variable the "ensureAwakeInContext" method has to be called, but this
>> has no effect. Same if refreshing the objects in the default editing
>> context ("refreshAllObjects", "refaultAllObjects") which is used on
>> all
>> pages.
>>
>> Any suggestions or other hints would be appreciated.
>>
>> Regards
>> Andri
>>
>>
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