I'm using a GWT UI. Is the recommended best practice to cache already received results in the client, and track the currently displayed page in the client, thus allowing to use the cached results when the user is displaying a page already retrieved from the server and going to the server only when the user pages forward?
On Sep 17, 9:39 pm, Robert Kluin <robert.kl...@gmail.com> wrote: > The cursor works sort of like a like a pointer, or a bookmark, in the > index. When you run the query it advances the pointer forwards. It > does not simply operate via offsets on the result set. Looks like the > range specifies how many records you want back, i.e. how far you want > it to advance the cursor. > > The current implementation of cursors do not allow you to run > backwards. There was talk about cursors supporting that feature, but > I have not heard about it six Google IO. > > Robert > > > > On Fri, Sep 17, 2010 at 16:57, Rick Horowitz <rickh...@gmail.com> wrote: > > I'm finding the JDO cursor usage documentation a bit confusing. > > According to the docs > > athttp://code.google.com/appengine/docs/java/datastore/queriesandindexe... > > > To get the initial page of results: > > > query.setRange(0, 20); // which makes sense > > > Then to get the second page of results, it again uses: > > > query.setRange(0, 20); // which is confusing. Shouldn't it be > > query.setRange(20, 40) ? > > > In addition, does the cursor allow one to specify the previous page to > > enable support for a "Previous Page" button in the user interface? > > > Thanks. Any clarification would be very much appreciated. > > > Rick > > > -- > > You received this message because you are subscribed to the Google Groups > > "Google App Engine" group. > > To post to this group, send email to google-appeng...@googlegroups.com. > > To unsubscribe from this group, send email to > > google-appengine+unsubscr...@googlegroups.com. > > For more options, visit this group > > athttp://groups.google.com/group/google-appengine?hl=en. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
