So yes, when a blip is out of context you would have no way to retrieve its document content from the event callback alone. What can you do now is maintain the context on your own with a datastore backend. Essentially keeping track of all wavelet and blip ids for lookup. We know that this is not ideal and we are working on this as speak to remove the limited context on callback. Stay tuned for updates. Austin
2009/10/22 Bálint Kriván <bal...@google.com> > Oh I see...So robot doesn't get the whole wavelet with all of the blips, > but the blip of the related event and it's parent. > Ok, but if I would like to access to the rootblip, and I get its id with > wavelet.getRootBlipId(), how can I request its content > (getDoucment().getText())? (wavelet.getRootBlip().getDocument().getText() > also throws null exception in these cases, so I don't have any idea how to > achieve this) > > Thanks for your guidance! > > > On Fri, Oct 23, 2009 at 2:56 AM, Austin Chau (Google employee) < > api.aus...@google.com> wrote: > >> Hi, >> To get the root blip id in your scenario - >> >> wave.appendBlip().getDocument().append(wavelet.getRootBlipId()); >> >> This would work because it does not require "context" of a grandparent >> blip. The reason that you are getting exception is because the context >> associated with an event callback only goes back its immediate parent. So >> in your case if the triggering event is resulted from a grandchild blip away >> from root, it will no longer has context to recreate the root blip when you >> invoked wavelet.getRootBlip() - thus you will get a null reference. >> >> Hope it helps, >> Austin >> >> 2009/10/22 Bálint Kriván <bal...@google.com> >> >> Reply to myself and others: I think this is related to >>> http://code.google.com/p/google-wave-resources/issues/detail?id=200 . >>> >>> 2009/10/22 Bálint Kriván <bal...@krivan.info> >>> >>> Hi! >>>> I have this little chunk of code: >>>> >>>> public void debug(RobotMessageBundle bundle, String msg) >>>> >>>> { >>>> >>>> List<String> list = new ArrayList(); >>>> >>>> list.add("<myaddress in google wave>"); >>>> >>>> Wavelet wave = bundle.createWavelet(list); >>>> >>>> wave.appendBlip().getDocument().append(msg); >>>> >>>> } >>>> >>>> @Override >>>> >>>> public void processEvents(RobotMessageBundle robotMessageBundle) { >>>> >>>> Wavelet wavelet = robotMessageBundle.getWavelet(); >>>> >>>> for (Event event : robotMessageBundle.getEvents()) { >>>> >>>> Blip currentBlip = event.getBlip(); >>>> >>>> switch (event.getType()) { >>>> >>>> case BLIP_SUBMITTED: >>>> >>>> debug(robotMessageBundle, >>>>> String.valueOf(wavelet.getRootBlip().getBlipId())); // line 46! >>>> >>>> } >>>> >>>> } >>>> >>>> } >>>> >>>> >>>> So when I add a blip to the wavelet where the robot is, it should open a >>>> new wave with me and send the id of the root blip (The top blip in the >>>> wavelet). >>>> But if this blip isn't right after the root blip (so the very first >>>> Reply button) then I've got a NullPointerException: >>>> >>>> java.lang.NullPointerException >>>> >>>> at com.google.wave.api.impl.BlipImpl.getBlipId(BlipImpl.java:56) >>>> >>>> at robot.MainServlet.processEvents(MainServlet.java:46) >>>> >>>> at >>>>> com.google.wave.api.AbstractRobotServlet.doPost(AbstractRobotServlet.java:89) >>>> >>>> [...] >>>> >>>> >>>> What is the recommended way to access the very first blip (which is I >>>> guess the RootBlip)? >>>> >>>> Thanks for your help! >>>> >>>> -- >>>> Üdv, >>>> Kriván Bálint >>>> >>> >>> >>> >>> -- >>> Üdv, >>> Kriván Bálint >>> >>> >>> >> >> >> > > > -- > Üdv, > Kriván Bálint > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Wave API" group. To post to this group, send email to google-wave-api@googlegroups.com To unsubscribe from this group, send email to google-wave-api+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-wave-api?hl=en -~----------~----~----~----~------~----~------~--~---
