Hmm. The one on code.google.com seems to be out of date. The version shipping with the SDK has:
private final transient QueryResultIteratorImpl<https://cs.corp.google.com/#google3/java/com/google/appengine/api/datastore/QueryResultIteratorImpl.java&ct=xref_jump_to_def&l=27> resultIterator<https://cs.corp.google.com/#google3/java/com/google/appengine/api/datastore/LazyList.java&ct=xref_usages&gs=java:Lcom/google/appengine/api/datastore/LazyList;.resultIterator)Lcom/google/appengine/api/datastore/QueryResultIteratorImpl;&l=32&gsn=resultIterator> ; ... /** * Custom serialization logic to ensure that we read the entire result set * before we serialize. */ private void writeObject <https://cs.corp.google.com/#google3/java/com/google/appengine/api/datastore/LazyList.java&ct=xref_usages&gs=java:Lcom/google/appengine/api/datastore/LazyList;.writeObject(Ljava/io/ObjectOutputStream;)V%257CLjava/io/IOException;&l=354&gsn=writeObject>(ObjectOutputStream <http://www.google.com/url?sa=D&q=http%3A%2F%2Fjava.sun.com%2Fjavase%2F6%2Fdocs%2Fapi%2Fjava%2Fio%2FObjectOutputStream.html> out <https://cs.corp.google.com/#google3/java/com/google/appengine/api/datastore/LazyList.java&ct=xref_usages&gs=java:Lcom/google/appengine/api/datastore/LazyList;.writeObject(Ljava/io/ObjectOutputStream;)V%257CLjava/io/IOException;%23out&l=354&gsn=out>) throws IOException <http://www.google.com/url?sa=D&q=http%3A%2F%2Fjava.sun.com%2Fjavase%2F6%2Fdocs%2Fapi%2Fjava%2Fio%2FIOException.html> { // Resolve all data before we serialize. resolveAllData <https://cs.corp.google.com/#google3/java/com/google/appengine/api/datastore/LazyList.java&ct=xref_jump_to_def&l=52>(); // Get ahold of the cursor before we serialize. cursor <https://cs.corp.google.com/#google3/java/com/google/appengine/api/datastore/LazyList.java&ct=xref_jump_to_def&l=43> = getCursor <https://cs.corp.google.com/#google3/java/com/google/appengine/api/datastore/LazyList.java&ct=xref_jump_to_def&l=340>(); out <https://cs.corp.google.com/#google3/java/com/google/appengine/api/datastore/LazyList.java&ct=xref_jump_to_def&l=354>.defaultWriteObject <http://www.google.com/url?sa=D&q=http%3A%2F%2Fjava.sun.com%2Fjavase%2F6%2Fdocs%2Fapi%2Fjava%2Fio%2FObjectOutputStream.html%23defaultWriteObject()>(); } On Thu, Jun 9, 2011 at 4:12 PM, Jeff Schnitzer <j...@infohazard.org> wrote: > On Thu, Jun 9, 2011 at 3:30 PM, Alfred Fuller > <arfuller+appeng...@google.com> wrote: > > > > Funny because we actually don't have this feature in python (only > iterators > > async prefetch). Ya, I would hope coders would use asIterable() when > doing a > > single for loop. The real win for asList() async prefetch is in these > > situations: > > List l = q.asList(); // returns immediately > > .... other work/rpcs... > > ... use l ... > > and > > // Launches and runs both queries in parallel > > List l1 = q1.asList(); // returns immediately > > List l2 = d2.asList(); // returns immediately > > ... use l1 and l2 ... > > Ah, that makes total sense. > > > The lazy list implementation in the low level is both lazy and > serializable. > > You should be able to do something similar in Objectify. > > This I don't understand. Looking at LazyList I see it references > QueryResultIteratorImpl and has no way of fully populating itself on > serialization. These classes might implement Serializable but you > sure can't serialize them! At least not if you want a useful set of > data on the other side. > > For example, this works right now: > > List<Foo> myRemoteMethod() { > return ObjectifyService.begin().query(Foo.class).list(); > } > > But unless I'm missing something really obvious, this will not work: > > List<Entity> myRemoteMethod() { > return DatastoreServiceFactory.getDatastoreService.prepare(new > Query("Foo")).asList(); > } > > Jeff > > -- > 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-appengine@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. > > -- 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-appengine@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.
