I have some cases where before returning the 'next' page, I store the
current page on a var on the next page, like 'previousPage'
nextPage=pageWithName("blabla");
nextPage.setPreviousPage(this);
Then on that page I have a link or button that returns previousPage.
return previousPage;
Seems to work alright. I'm willing to be educated on a better way if
any.
Henrique Gomes
On Oct 14, 2009, at 2:55 PM, Andri vonAllmen wrote:
The end result:
A user navigates from page A to page B to page C.
Page C has a hyperlink to page A (return pageWithName("A")).
If clicking on this hyperlink, page A shall be shown in the same
state as it has been left (e.g. the same filter options, etc.).
Mike Schrag <msch...@mdimension.com> schrieb am Mittwoch, 14.
Oktober 2009 um
15:18 in Nachricht <2a345bc9-7581-4c6c-82ab-89e761ee3...@mdimension.com
>:
Can you explain this more in terms of the end result you're trying to
achieve rather the approach you're trying at the moment?
On Oct 14, 2009, at 4:03 AM, Andri vonAllmen wrote:
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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