Thank you for your help! The development has become a lot easier now. soujiro
On 1月20日, 午前1:56, WillSpecht <willspe...@gmail.com> wrote: > You can look at the local datastore at localhost:8888/_ah/admin Also > if you are storing things in an arraylist you should be using > pm.makePersistentAll(gcalendar). This is because this is only one api > call instead of how ever many objects are in your arraylist, plus its > less code. to erase entries you can use the datastore viewer or > delete the local datastore which is descrbed well in this answer on > stackoverflowhttp://stackoverflow.com/questions/1062540/how-to-delete-all-datastor... > > On Jan 15, 3:05 am, soujiro0725 <soujiro0...@gmail.com> wrote: > > > > > > > > > Hi I'm a newbie in App Engine. > > Right now, I am trying to develop an application myself, but my basic > > understanding is weak. So someone, please clarify my knowledge. > > > The question is HOW to store the data and to know what is stored. > > > Say, I have my own class like, > > > GCalendar(String date, String day, String time, String content) > > > The variable "date" can be either a Date object or simply a String > > object as long as the information (such as "2010/12/14") can be stored > > and retrieved. > > > Since an instance of this class represents one event, I want an array > > of this class like, > > > List<GCalendar>gcalendar = new ArrayList<GCalendar>(); > > > After obtaining data, I want to store them into Bigtable, so > > > //----------------------------- > > PersistenceManager pm = PMF.get().getPersistenceManager(); > > for (int j = 0; j < gcalendar.size(); j++){ > > try { > > pm = PMF.get().getPersistenceManager(); > > pm.makePersistent(gcalendar.get(j)); > > } finally { > > pm.close(); > > }} > > > //----------------------------- > > Is this enough? > > > The reason I'm asking is that I have no idea what is being stored as > > the instance, namely "pm". > > GCalendar object, maybe? > > > Once the program is executed, it seems like some data is stored, even > > if a part of it produces errors. > > > How can I erase the entire data in order to start from scratch? > > > If I can find out what is now stored with PersistenceManager, it seems > > easier to continue fixing errors. > > > soujirou -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
