That would mean that I use only my extended WebPage... Would that be executed on AJAX calls? I would want to execute prepareQuery on all objects that will be updated through AJAX.
Joe: Yes I know. I've written about cursors in my first post. 2010/4/27 Igor Vaynberg <[email protected]> > page.onbeforerender() might work. > > -igor > > On Tue, Apr 27, 2010 at 12:34 PM, Piotr Tarsa <[email protected]> > wrote: > > OK. To simplify question - I want to have method prepareQuery(DataStore > > dataStore) in my own IModel subinterface and before page rendering I > would > > want to execute that method for every model. Where should I do that? Is > > there some place in RequestCycle where I could do that? > > > > 2010/4/26 Piotr Tarsa <[email protected]> > > > >> Hello, > >> > >> I want to use Wicket with GAE and exploit all GAE features but some > >> problems arise. > >> > >> 1. I'm looking for a good solution for asynchronous simulteanous queries > in > >> Wicket. DataStore has a functionality of asynchronous queries so I would > >> want to be able to fire various queries before rendering anything and > then > >> return the actual model objects when rendering particular component. I > think > >> of an Interface (or, better, abstract class) extending IModel with an > >> additional method, name it prepareModel() which would run the > asynchronous > >> query, so getObjet would just wait for the query to finish and then > return > >> the result (this way total time spend of waiting for DataStore queries > will > >> be at most equal to slowest query). DataStore entities are organized > into > >> Entity Groups where there are ancestors and descendants. So sometimes to > >> find an object I must first find the ancestor. So I would want to fire > the > >> prepareModel() for parent components first. > >> > >> 2. DataStore doesn't support joins internally and it's queries are > limited > >> to 1000 results (this means that GQL COUNT will never return value > higher > >> than 1000 even if there's more that 1000 entities that mets the > >> requirements). Instead DataStore provides cursors to retrieve more than > 1000 > >> results and GAE devs recommends using separate sharded counters instead > of > >> GQL COUNT's (of course if the result would never exceed 1000 then we > shall > >> use normal GQL COUNT). Are there any components (repeaters) in Wicket > that > >> supports that approach? > >> > >> 3. I think that Wicket should be able to store pages from PageMap > >> independently. This way we could store pages in separate entities in > >> datastore (DataStore doesn't have schemas, one can store entities of any > >> form as every kind) so fewer bytes would be transmitted to and from > >> DataStore (Http Sessions are kept in MemCache and DiskStore). > >> > >> 4. How to inject an DataStore object in Models that will be testing > >> friendly? > >> > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > >
