[appengine-java] appcfg deployment hangs at jsp compile

[lp]

hi guys

i cannot deploy to appengine because the appcfg hangs at 8% jsp
compiling.

i have deployed hundreds of these and i dunno what is wrong.

i am losing my mind over this simple deployment.

appcfg.cmd update c:\src\mingle\geoserver\trunk\target\geoserver-1.0-
SNAPSHOT
Reading application configuration data...
4/03/2011 15:15:00
com.google.apphosting.utils.config.AppEngineWebXmlReader read
AppEngineWebXml
INFO: Successfully processed c:/src/mingle/geoserver/trunk/target/
geoserver-1.0-
SNAPSHOT\WEB-INF/appengine-web.xml
4/03/2011 15:15:00
com.google.apphosting.utils.config.AbstractConfigXmlReader re
adConfigXml
INFO: Successfully processed c:/src/mingle/geoserver/trunk/target/
geoserver-1.0-
SNAPSHOT\WEB-INF/web.xml
4/03/2011 15:15:00
com.google.apphosting.utils.config.AbstractConfigXmlReader re
adConfigXml
INFO: Successfully processed c:/src/mingle/geoserver/trunk/target/
geoserver-1.0-
SNAPSHOT\WEB-INF/cron.xml
4/03/2011 15:15:00 com.google.apphosting.utils.config.IndexesXmlReader
readConfi
gXml
INFO: Successfully processed c:\src\mingle\geoserver\trunk\target
\geoserver-1.0-
SNAPSHOT\WEB-INF\appengine-generated\datastore-indexes-auto.xml
Beginning server interaction for minglegeo...
0% Creating staging directory
5% Scanning for jsp files.
8% Compiling jsp files.

thats it.. it stay like that for ever.

after 1 minute 10 minutes doesnt matter. nothing changes.

no errors in console or logs.

a javac process is running with 0 cpu

i am using jdk1.6_06

any help is most appreciated for my sanity,

thanks

-lp

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[appengine-java] Re: Problem with query - jdo

[lp]

 The persistence layer uses lazy-load approach, so when in jsp it tries to
 access to entities extracted from the database it throws exception because
 the persistence manager is just closed.
 So, how to avoid this problem?

so either use eager fetch... not a good idea for large objects.
OR
use a VTO pattern (http://java.sun.com/blueprints/patterns/
TransferObject.html) to populate ur presentation objects.
this enables the persistence layer transaction to be abstracted away
from presentation.

VTO pattern is more usefull.

-lp

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[appengine-java] Re: Error javax.persistence.PersistenceException: Illegal argument

[lisandrodc]

Hi Didier!...
To what part of the blog do you you recount that it is associated with
my worry?
Regards
Lisandro

On Feb 28, 2:40 am, Didier Durand durand.did...@gmail.com wrote:
 Sorry,

 Got confused with Objectify that I use now in place of JDO/JPA.

 Look at this blog:http://gae-java-persistence.blogspot.com/

 You have there the needed examples to solve your problem

 regards

 didier

 On Feb 27, 2:53 pm, lisandrodc lisandr...@gmail.com wrote:



  Thanks Didier, but @Parent It is not an annotation of JPA...
  link:http://www.datanucleus.org/products/accessplatform_1_1/jpa/annotation...
  What is what you say that I must place in the code?

  Regards
  Lisandro

  On 27 feb, 04:06, Didier Durand durand.did...@gmail.com wrote:

   Yes,

   You can't update 2 entities that are not related by a parent (@Parent)
   - child relationship in a single transaction else GAE creates them in
   2 separate entity groups and then throws an exception because a
   transaction can't update objects in more than 1 entity group.

   See parag Entity Groups 
   inhttp://code.google.com/appengine/docs/java/datastore/transactions.html

   regards

   didier

   On Feb 26, 8:49 pm, lisandrodc lisandr...@gmail.com wrote:

Hi ! I have an error at update an object:

public void agregarGrupoConUsuario(Usuario usuario,Long idGrupo) {

                EntityTransaction et= em.getTransaction();
                try {
                        et.begin();
                        ControladorGrupoTorneo cGT = new 
ControladorGrupoTorneo();
                        GrupoTorneo grTorneo = 
cGT.devolverGrupoTorneo(idGrupo);
                        usuario.agregarGrupoTorneo(grTorneo);
                        em.merge(usuario);
                        et.commit();
                       //the exception at commit;
                        System.out.println(persistioUsuarioConGrupo);
                } finally {

The error is:

Caused by: java.lang.IllegalArgumentException: can't operate on
multiple entity groups in a single transaction. found both Element {
  type: GrupoTorneo
  id: 3}

 and Element {
  type: Usuario
  id: 11

}

Class Usuario:

@Entity
public class Usuario {
        @Id
        @GeneratedValue(strategy = GenerationType.IDENTITY)
        private Key id;

        private String nombreUsuario;

        private String nombre;

        private String apellido;

        private String telefono;

        private String password;

        private String mail;

        private String imagen;

        private String ciudad;

        private String pais;
        @OneToMany(cascade = {CascadeType.PERSIST, CascadeType.REMOVE,
                                    CascadeType.REFRESH, 
CascadeType.MERGE})
        private ListRegFechaUsuario listRegFechaUsuario;
        @OneToMany(cascade = {CascadeType.PERSIST, CascadeType.REMOVE,
                    CascadeType.REFRESH, CascadeType.MERGE})
        private ListGrupoTorneo gruposTorneo;
    /**


Class GrupoTorneo:

@Entity
public class GrupoTorneo  {
        @Id
        @GeneratedValue(strategy = GenerationType.IDENTITY)
        private Key id;

        private String nombre;

        private String descripcion;

        private Date fechaCreacion;

        private Long idTorneo;

        private Long idUsuarioCreador;

        private String nombreUsuarioCreador;

        private Long idGrupo;
...
...

Solution?

Regards

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[appengine-java] Re: Collection object not being updated

[lisandrodc]

Hi Cosmin!
I have decided to use JPA due to the fact that with JDO I met several
bugs associated
with GAE and JPA I had fewer problems, beyond the restrictions that
there imposes GAE of the correct
use of the oriented object programming . Because of it I recommend to
you to use for GAE, JPA...
Regards

On Mar 1, 1:59 pm, Ian Marshall ianmarshall...@gmail.com wrote:
 Hi Cosmin,

 I do not see any calls to

   pm.makePersistent(...);

 I use this to persist newly-created persistent instances.

 I know that you do not use transactions, but I do. Within an active
 transaction, one can update persistent instances and even persist or
 delete entity group child instances without calling

   pm.makePersistent(...);

 Have you looked at the GAE persistence blog of Max Ross of Google?
 There are some excellent working examples there...

 Ian

 On Feb 28, 6:55 pm, Cosmin Stefan cosmin.stefandob...@gmail.com
 wrote:



  So no ideea anyone?

  On Feb 25, 11:42 pm, Cosmin Stefan cosmin.stefandob...@gmail.com
  wrote:

   Hey,

   I have an issue while trying to update one object in a collection,
   using JDO.

   Here are the facts:
      o i have a class (let's call it BigClass), that has an embedded
   class(SmallClass) containing an ArrayList.
      o I DONT use/need a transaction
      o I query the database to get a List of BigClass items that should
   be modified. I iterate through each of them and I...
      o I remove an element from the list in the SmallClass embedded in
   the current BigClass, the changes are not ALWAYS persisted
      o if I print (log) the object after the change, it looks modified,
   but if i check the DataViewer, the object was not updated
      o i even tried using JDOHelper.makeDirty on the BigClass, with the
   fieldName SmallClass, and it still doesn't work.

   Some relevant code:

                                   Query q = 
   pm.newQuery(BigClass.class,id==:ids);
                                   ListBigClass 
   participatingUsers=(ListBigClass)
   q.execute(participantIDs);

                                   //Update the participants
                                   ListIteratorBigClass 
   it=participatingUsers.listIterator();
                                   BigClass participant;
                                   boolean modified;
                                   while(it.hasNext())
                                   {
                                           participant=it.next();
                                           participant.list.remove(smth);

   JDOHelper.makeDirty(participant,collection);
                                  }
                                  
                                  modify other objects
                                  
                                  pm.close()

   Another thing is that some of the changes I make after this part are
   persisted...

   So, if you have any suggestions, shoot pls!

   Cosmin

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[appengine-java] Problem using REST in GAE

[Stefano Tonello]

Hi guys!! In my project i have to check in the datastore if an e-mail is 
already present through this rest request: (using Spring Mvc+Json)

@RequestMapping(method = RequestMethod.GET, value = 
/list_user/{email}, headers = Accept=application/json)
public @ResponseBody boolean getComment(@PathVariable String email) 
throws Base64DecoderException{
email = new String(Base64.decode(email));
String email2 = email.toLowerCase();
int compareResult = email.compareTo(email2);
if (compareResult != 0)
return false;
EmailValidator ev = EmailValidator.getInstance();
if (!ev.isValid(email))
return false;
else 
return true;
}   

Locally the request return a boolean value as planned but on appspot it 
doesn't return a value... Can anybody help me please? 

Another question: Can i return a http header using a GET?

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[appengine-java] Re: Logging file size

[Didier Durand]

Hi,

Interesting question!

From the quota page: http://code.google.com/appengine/docs/quotas.html,
it doesn't seem that there is not any official limit on logging.

Maybe some googler will let us know if there is one anyway or not.

On Mar 4, 4:30 pm, JT jem...@gmail.com wrote:
 I know there is a limit of 6.5 hours CPU time per day for GAE4J, but if I
 turn on verbose logging onto the console like using System.out.println, does
 the size of the logging limited by GAE in any way?

 Thanks for any hint!

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[appengine-java] Data store transfer

[Vik]

Hie

I was using my gmail account to signup and host a web app on GAE.

We do have an google apps account. Earlier it was not possible to sign up
GAE using apps accounts. But now it is.,
So, how can we move our existing data to the new app hosted on account
signed up with google apps ?



Thankx and Regards

Vik
Founder
www.sakshum.com
www.sakshum.blogspot.com

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[appengine-java] Re: Error javax.persistence.PersistenceException: Illegal argument

[Didier Durand]

Hi,

Look at

http://gae-java-persistence.blogspot.com/2009/10/executing-batch-gets.html



http://gae-java-persistence.blogspot.com/2009/10/optimistic-locking-with-version.html

regards

didier

On Mar 4, 1:45 pm, lisandrodc lisandr...@gmail.com wrote:
 Hi Didier!...
 To what part of the blog do you you recount that it is associated with
 my worry?
 Regards
 Lisandro

 On Feb 28, 2:40 am, Didier Durand durand.did...@gmail.com wrote:

  Sorry,

  Got confused with Objectify that I use now in place of JDO/JPA.

  Look at this blog:http://gae-java-persistence.blogspot.com/

  You have there the needed examples to solve your problem

  regards

  didier

  On Feb 27, 2:53 pm, lisandrodc lisandr...@gmail.com wrote:

   Thanks Didier, but @Parent It is not an annotation of JPA...
   link:http://www.datanucleus.org/products/accessplatform_1_1/jpa/annotation...
   What is what you say that I must place in the code?

   Regards
   Lisandro

   On 27 feb, 04:06, Didier Durand durand.did...@gmail.com wrote:

Yes,

You can't update 2 entities that are not related by a parent (@Parent)
- child relationship in a single transaction else GAE creates them in
2 separate entity groups and then throws an exception because a
transaction can't update objects in more than 1 entity group.

See parag Entity Groups 
inhttp://code.google.com/appengine/docs/java/datastore/transactions.html

regards

didier

On Feb 26, 8:49 pm, lisandrodc lisandr...@gmail.com wrote:

 Hi ! I have an error at update an object:

 public void agregarGrupoConUsuario(Usuario usuario,Long idGrupo) {

                 EntityTransaction et= em.getTransaction();
                 try {
                         et.begin();
                         ControladorGrupoTorneo cGT = new 
 ControladorGrupoTorneo();
                         GrupoTorneo grTorneo = 
 cGT.devolverGrupoTorneo(idGrupo);
                         usuario.agregarGrupoTorneo(grTorneo);
                         em.merge(usuario);
                         et.commit();
                        //the exception at commit;
                         
 System.out.println(persistioUsuarioConGrupo);
                 } finally {

 The error is:

 Caused by: java.lang.IllegalArgumentException: can't operate on
 multiple entity groups in a single transaction. found both Element {
   type: GrupoTorneo
   id: 3}

  and Element {
   type: Usuario
   id: 11

 }

 Class Usuario:

 @Entity
 public class Usuario {
         @Id
         @GeneratedValue(strategy = GenerationType.IDENTITY)
         private Key id;

         private String nombreUsuario;

         private String nombre;

         private String apellido;

         private String telefono;

         private String password;

         private String mail;

         private String imagen;

         private String ciudad;

         private String pais;
         @OneToMany(cascade = {CascadeType.PERSIST, CascadeType.REMOVE,
                                     CascadeType.REFRESH, 
 CascadeType.MERGE})
         private ListRegFechaUsuario listRegFechaUsuario;
         @OneToMany(cascade = {CascadeType.PERSIST, CascadeType.REMOVE,
                     CascadeType.REFRESH, CascadeType.MERGE})
         private ListGrupoTorneo gruposTorneo;
     /**
 

 Class GrupoTorneo:

 @Entity
 public class GrupoTorneo  {
         @Id
         @GeneratedValue(strategy = GenerationType.IDENTITY)
         private Key id;

         private String nombre;

         private String descripcion;

         private Date fechaCreacion;

         private Long idTorneo;

         private Long idUsuarioCreador;

         private String nombreUsuarioCreador;

         private Long idGrupo;
 ...
 ...

 Solution?

 Regards



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[appengine-java] logging with .info() causes 840cpu_ms an WARNING

[micho]

This request caused a new process to be started for your application,
and thus caused your application code to be loaded for the first time.
This request may thus take longer and use more CPU than a typical
request for your application.

How can I avoid that.

If I change le log call from .info() to .warning the request is
handled fast without the message above.

Thanky for helping

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[appengine-java] Far too many 500 errors for some requests, 203 errors, high latency

[Prashant Hegde]

Dear Appengine team,

Our application is experiencing 500 errors for the past 12 hours. Currently
our pages are not coming up at all. One example of the log is as follows.

-
*2011-03-03 16:22:49.391 /admin/[OUR_URL] 500 10466ms 0cpu_ms 0kb
AppEngine-Google; (+http://code.google.com/appengine)*
*0.1.0.1 - - [03/Mar/2011:16:22:49 -0800] GET /admin/[OUR_URL] HTTP/1.1
500 0 - AppEngine-Google; (+http://code.google.com/appengine) [OURAPP].
appspot.com ms=10466 cpu_ms=0 api_cpu_ms=0 cpm_usd=0.28
queue_name=__cron task_name=48e5f5bf96117979c2ac24c0c5a7ed25 exit_code=203*
*
*
*2011-03-03 16:22:49.322*
*A serious problem was encountered with the process that handled this
request, causing it to exit. This is likely to cause a new process to be
used for the next request to your application. If you see this message
frequently, you should contact the App Engine team. (Error code 203)*
*-*
*
*
*
*
Also, for the past couple of days we are seeing far too many
loading_requests, inordinate delays.. Need help from the appengine team. In
case you want the app ID let me know, I will share it privately anyone
interested.

Thanks a lot for your help.

Prashant

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[appengine-java] Re: Far too many 500 errors for some requests, 203 errors, high latency

[Prashant Hegde]

Follow up on some more troubleshooting we did,

1. we created another app id, and uploaded the same code, and we were able
to get it working.
2. We created another version of the same code in the same appid, but it did
not work
3. we suspected the data store and we cleaned up all our app, and now it is
working fine ( so far )

This is concerning to us, as we are planning to go live very soon. What is
that in our data store that caused this issue to occur ? Is there a way to
determine that? We did not get any information in the logs apart from
continuous stream of 500 errors ( and 203 errors).

We do not mind paying for always on, but will that make it go away?

We seek help / guidance from the google app engine team to diagnose any
problems with our app by looking at our app behaviour, before we expose our
customers to the risk.

Thanks in advance.

Regards
Prashant





On Fri, Mar 4, 2011 at 10:45 AM, Prashant Hegde prashant.he...@gmail.comwrote:

 Dear Appengine team,

 Our application is experiencing 500 errors for the past 12 hours. Currently
 our pages are not coming up at all. One example of the log is as follows.

 -
 *2011-03-03 16:22:49.391 /admin/[OUR_URL] 500 10466ms 0cpu_ms 0kb
 AppEngine-Google; (+http://code.google.com/appengine)*
 *0.1.0.1 - - [03/Mar/2011:16:22:49 -0800] GET /admin/[OUR_URL] HTTP/1.1
 500 0 - AppEngine-Google; (+http://code.google.com/appengine) [OURAPP].
 appspot.com ms=10466 cpu_ms=0 api_cpu_ms=0 cpm_usd=0.28
 queue_name=__cron task_name=48e5f5bf96117979c2ac24c0c5a7ed25 exit_code=203
 *
 *
 *
 *2011-03-03 16:22:49.322*
 *A serious problem was encountered with the process that handled this
 request, causing it to exit. This is likely to cause a new process to be
 used for the next request to your application. If you see this message
 frequently, you should contact the App Engine team. (Error code 203)*
 *-*
 *
 *
 *
 *
 Also, for the past couple of days we are seeing far too many
 loading_requests, inordinate delays.. Need help from the appengine team. In
 case you want the app ID let me know, I will share it privately anyone
 interested.

 Thanks a lot for your help.

 Prashant







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[appengine-java] Re: eclipse shows error in .jsp but tutorial project runs

[Alfredo Nuti]

I'm getting exactly the same thing. How did you create you jsp file? I
could not find a specific jsp file
on the File/New so I created a generic file and named it
guestbook.jsp. This may be the problem, but I
could not find a way around it.

On Mar 2, 5:43 pm, marsh...@marshallfarrier.com
marsh...@marshallfarrier.com wrote:
 another thing that might be helpful for diagnostics of my
 guestbook.jsp following the java tutorial: Eclipse isn't color coding
 anything or making use of its programmer-friendly features on the .jsp
 file, which i have in the war directory of the project. Eclipse is of
 course using a JDK for the project, so that error message is rather
 cryptic to me. it just somehow isn't understanding what the .jsp
 really is, even though when it builds, it builds the project correctly
 (since it runs) but thinks there is an error--if that makes any sense.

 moving forward in the tutorial, all of this amounts not only to the
 annoyance of the red-x marker, but also as i edit the file, since
 eclipse isn't checking it, i'm on my own in terms of checking for
 punctuation and all that--it would just be nice if eclipse could give
 me the info that it usually does rather than misunderstanding that
 file.

 On Mar 1, 9:42 pm, marsh...@marshallfarrier.com

 marsh...@marshallfarrier.com wrote:
  actually, i did just discover some info on what it doesn't like: Down
  in the bottom box where there's a console tab and a few others, there
  is also a problems tab. When i click there it says your project must
  be configured to use a JDK in order to use JSPs.

  Just following the tutorial, i did change web.xml to have
  guestbook.jsp as welcome-file but didn't change anything else. web.xml
  in its entirety is:
  [code]
  ?xml version=1.0 encoding=utf-8?
  web-app xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance;
  xmlns=http://java.sun.com/xml/ns/javaee;
  xmlns:web=http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd;
  xsi:schemaLocation=http://java.sun.com/xml/ns/javaeehttp://java.sun.com/xml/ns/javaee/we...;
   version=2.5
          servlet
                  servlet-nameGuestbook/servlet-name
                  servlet-classguestbook.GuestbookServlet/servlet-class
          /servlet
          servlet-mapping
                  servlet-nameGuestbook/servlet-name
                  url-pattern/guestbook/url-pattern
          /servlet-mapping
          welcome-file-list
                  welcome-fileguestbook.jsp/welcome-file
          /welcome-file-list
  /web-app

  [/code]
  p.s.: what tags do you use here to set code apart so that it's easier
  to read?
  On Mar 1, 2:08 pm, Ikai Lan (Google) ika...@google.com wrote:

   Do you know what the error says when you hover over the X?

   Could just be Eclipse weirdness.

   Ikai Lan
   Developer Programs Engineer, Google App Engine
   Blog:http://googleappengine.blogspot.com
   Twitter:http://twitter.com/app_engine
   Reddit:http://www.reddit.com/r/appengine

   On Tue, Mar 1, 2011 at 8:05 AM, Aisthesis 
   marsh...@marshallfarrier.comwrote:

i'm just trying to learn how the app engine works and was working
through the tutorial. in the guestbook.jsp version, using eclipse, i
started off with some actual errors (missing quotation mark, missing
space) but after getting enough of those corrected that the program
does run in my browser, i still get the x-file sign in eclipse next
to the guestbook.jsp file, and it hasn't gone away after repeated
cleans.

here's my file:
[code]
%@ page contentType=text/html;charset=UTF-8 language=java %
%@ page import=com.google.appengine.api.users.User %
%@ page import=com.google.appengine.api.users.UserService %
%@ page import=com.google.appengine.api.users.UserServiceFactory %

html
       body

%
       UserService userService = UserServiceFactory.getUserService();
       User user = userService.getCurrentUser();
       if (user != null) {
%
       pHello, %= user.getNickname() %! (You can
       a href=%= userService.createLogoutURL(request.getRequestURI())
%sign
       out/a.)/p

%
       } else {
%
       pHello! a href=%=
userService.createLoginURL(request.getRequestURI()) %Sign
       in/a to include your name with greetings you post./p

%
       }
%
       /body
/html
[/code]

is there still something wrong with it? and, if not, any ideas as to
what might be causing the eclipse error symbol?

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[appengine-java] Re: Problem using REST in GAE

[Andrea]

A GET response ever with a HTTP STATUS ! ;)
How are u making your GET request? Have you specify to include the HTTP 
HEADER ? 

Example for your REST (using curl command): 

curl -i -HAccept:application/json 
 http://yourdomaid/restpath/list_user/somethingencoded


For the other question i have no answer, sorry!

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[appengine-java] Re: Login redirect failing all of a sudden /_ah/conflogin

[Glenn]

What was the good workaround?  Our login is broken, too.

We have two App Engine apps: one is the front end and one the back
end,
with a REST API.  When the user accesses the front end a call to the
back end is made where

redirect = userService.createLoginURL(gae front end);

is called.  In this case both apps have appspot.com urls and
it worked well.  We are dead in the water now.

Please help!

Thanks,
Glenn

On Mar 2, 12:31 pm, Jon McAlister jon...@google.com wrote:
 Looks like you pushed a good workaround already, but yes that was a
 result of a new login system yesterday, and looks like it is not
 handling this case like the prior system did.

 Specifically, calling createLoginUrl where the continue url is not the
 same as the url the app is hosted on. And, furthermore, the continue
 url is not an app engine url at all.

 For now, what you did was a good workaround. That is, use an app
 engine url as the continue url, and then have the app engine app
 redirect to the non-app-engine url.

 Need to think on this case some more.



 On Wed, Mar 2, 2011 at 7:53 AM, Joerg Weingarten jbwinvest...@gmail.com 
 wrote:
  Since this morning my call to userservice.createLoginUrl produces a
  url that doesn't work anymore. When selecting my Sign in link, which
  has a url like:

 https://www.google.com/accounts/ServiceLogin?service=ahpassive=true;...

  I get the error:

  The requested URL /_ah/conflogin was not found on this server.

  Somebody please help.

  Thx
  ---Joerg---

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Re: [appengine-java] Re: Login redirect failing all of a sudden /_ah/conflogin

[Jon McAlister]

The workaround is to have the app perform the redirect. That is,
createLoginUrl only works when the continue url is a url for the app.
If you need the user to be sent to another app/host after login, then
your app needs to do that redirect.

On Fri, Mar 4, 2011 at 11:47 AM, Glenn glenn.mur...@gmail.com wrote:
 What was the good workaround?  Our login is broken, too.

 We have two App Engine apps: one is the front end and one the back
 end,
 with a REST API.  When the user accesses the front end a call to the
 back end is made where

 redirect = userService.createLoginURL(gae front end);

 is called.  In this case both apps have appspot.com urls and
 it worked well.  We are dead in the water now.

 Please help!

 Thanks,
 Glenn

 On Mar 2, 12:31 pm, Jon McAlister jon...@google.com wrote:
 Looks like you pushed a good workaround already, but yes that was a
 result of a new login system yesterday, and looks like it is not
 handling this case like the prior system did.

 Specifically, calling createLoginUrl where the continue url is not the
 same as the url the app is hosted on. And, furthermore, the continue
 url is not an app engine url at all.

 For now, what you did was a good workaround. That is, use an app
 engine url as the continue url, and then have the app engine app
 redirect to the non-app-engine url.

 Need to think on this case some more.



 On Wed, Mar 2, 2011 at 7:53 AM, Joerg Weingarten jbwinvest...@gmail.com 
 wrote:
  Since this morning my call to userservice.createLoginUrl produces a
  url that doesn't work anymore. When selecting my Sign in link, which
  has a url like:

 https://www.google.com/accounts/ServiceLogin?service=ahpassive=true;...

  I get the error:

  The requested URL /_ah/conflogin was not found on this server.

  Somebody please help.

  Thx
  ---Joerg---

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[appengine-java] Re: Could Not Verify SSL Certificate

[Sam Edwards]

Still experiencing the same problem with 1.4.2

On Feb 28, 1:35 pm, Rafael Nunes rafael.nu...@gmail.com wrote:
 Same problem here.
 Any news?

 On Feb 19, 12:05 am, mushion22 goodham...@gmail.com wrote:







  I have the same issue using 1.4.2 on OS X 10.6. The app works fine
  when deployed to production, but has theseSSLcertificateerrors in
  the development server. Seems to affect more than just the Google
  APIs, am having the same issue with RestFB.

  On Feb 18, 3:55 pm, Tod Jiang t...@cherrymind.com wrote:

   Yes, I got the similar issue, and it's ok in SDK1.4.0

   latest spreadsheet api

   Caused by: javax.net.ssl.SSLHandshakeException:CouldnotverifySSL
  certificatefor:https://spreadsheets.google

   On Feb 17, 7:30 pm, Nurettin Omer Hamzaoglu nomerhamzao...@gmail.com
   wrote:

Hi,

After I've update to GAE 1.4.2 I started to receive the following error 
when
retrieving customer license.
javax.net.ssl.SSLHandshakeException:CouldnotverifySSLcertificatefor:https://www.googleapis.com/appsmarket/v2sandbox/customerLicense/

Java(TM) SE Runtime Environment (build 1.6.0_22-b04-307-10M3261)
App Engine API 1.4.2
Google API Client 1.2.2 alpha

With the following versions I'mnotgetting the error, everything works
fine.
Java(TM) SE Runtime Environment (build 1.6.0_22-b04-307-10M3261)
App Engine API 1.4.0
Google API Client 1.2.2 alpha

I've also opened threads 
athttps://groups.google.com/forum/?lnk=raot#!topic/google-apps-marketpl...
 andhttps://groups.google.com/forum/?lnk=raot#!topic/google-api-java-clie...
 andhttps://groups.google.com/forum/?lnk=raot#!topic/google-api-java-clie...
.

Thanks.

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[appengine-java] Re: logging with .info() causes 840cpu_ms an WARNING

[micho]

Tanks,

But Why is there only a loading Request with the .Info() logging ( for
example None for warn())?

On 4 Mrz., 21:18, Simon Knott knott.si...@gmail.com wrote:
 That is just the warning message which is output by GAE for a loading
 request for your app.

 Read about loading requests 
 here:http://code.google.com/appengine/kb/java.html#What_Is_A_Loading_Request

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Re: [appengine-java] how to keep fields unique

[Ed Murphy]

I'm struggling with a bug that is closely related to this thread.  I think 
transactions all by themselves will not work here.  This is because the 
transactions are optimistic.  So, if the transaction looks like this (pseudo 
code)

pm.currentTransaction.begin();
Object preexistingEntity = pm.query(for secondary key);
if(null != preexistingEntity) throw SecondaryKeyException
pm.insert(new Entity(secondary key));
pm.currentTransaction.commit().


The issue (I think) is that because transactions are optimistic, it is still 
possible for a race condition.  Two separate processes can create a 
transaction and attempt to read the preexistingEntity.  If they are very 
close in time (like my case, 32 milliseconds), then they will both return 
null, since the entity does not yet exist.  So, neither process will throw 
the SecondaryKeyException.  The will both go on and create new entitities 
and insert them.  Each of these entities will have different primary keys 
because the database creates these, but the entity's secondary key (an email 
address in this case) is not enforced by the database, so there is no error 
on either commit.  Thus, I end up with two entities with a duplicate value 
for a field that I want to be unique.  

I my case, this happened when the user double-clicked an activation link; 
 The server received two requests within 50 milliseconds of each other and 
both transactions completed without error.  

I want to use a human readable, unique field for my users names.  I need the 
database generated unique id to create relationships with other entities 
that survive even if the human readable field is changed.  For instance, if 
a user changes their email address, I don't want to have to go around to all 
the possible related entities and fixup references to it.  So, I use the 
primary Key for this.  But I still want the email address to be unique in 
the database.

Anyone from Google know how to make this happen?  HELP


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Re: [appengine-java] how to keep fields unique

[Ed Murphy]

OK, here is something that looks promising; 

http://squeeville.com/2009/01/30/add-a-unique-constraint-to-google-app-engine/

This shows a solution in python, but the concept is applicable to Java. 
 Basically, for the unique field, you create another database entity and 
derive a primary Key based on the unique field.  Since the database ensures 
uniqueness of a primary key, this means that we can atomically create and 
check the existence of this entity.   So my pseudocode might look like;

pm.currentTransaction.begin();
Object preexistingKey = pm.insert(new SecondaryKeyEntity(secondary key));
pm.currentTransaction.commit();

//
// if we get here, then the previous transaction completed and
// no other process will be able to get to this section of the code
// using the same secondary key
//
pm.currentTransaction.begin();
pm.insert(new Entity(secondary key));
pm.currentTransaction.commit().

Of course, you need to do something similar when you change the secondary 
key (for instance, if someone wants to update their email address).  Again, 
just attempt to create an 'SecondaryKeyEntity' with the new email address. 
 If that successes, then you can change the email address in the primary 
entity.  Remember to delete the old SecondaryKeyEntity after!!

I'll work on this over the weekend and post some code if I figure it out.  

In the mean time, if anyone has already done this, please let us know. 
 Thanks.

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[google-appengine] Re: Cant Update Indexes or Access Indexes in Datastore Admin

[Aaron]

Never mind.  I'm in now.

On Mar 3, 11:20 pm, Aaron aaron.t.che...@gmail.com wrote:
 Hi,

 For the past two days, I haven't been able to upload my index
 definitions when I deploy.  I receive a message saying: Your app was
 updated, but there was an error updating your indexes. Please retry
 later with appcfg.py update_indexes.

 When I try to update_indexes I get a 500 error.  In addition, when I
 log into my admin console, I get a server error when trying to view my
 Datastore Indexes.

 Any help in this matter would be greatly appreciated.

 Thanks.

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Re: [google-appengine] Re: How to fetch the parent and child data in one to many relation based on child properties

[djidjadji]

What is the problem of traversing the Leave objects, harvest all the
unique parent keys and retrieve them in a second query.

In Python:

leaves = someQuery.fetch(1000)
parentKeys=set( [ k.key() for k in leaves ] )
parents = db.get(list(parentKeys))

2011/3/3 andy andy.anand1...@gmail.com:
 I have Employee and Leave Transactions Details entities in one to many
 relation when i execute a query against Employee(parent) i am getting
 the result of employee and its responding leave transaction but if i
 need the information based on child properties (like 'Status' if
 Status is Applied ) then only retrieve the specific properties
 (rather than all details) of employee and leave transaction details.
    what you have suggested is right but using that i only get the
 child information but i want to include the parent also.
 one more can include more than one entity in query, like joining two
 tables/entity


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[google-appengine] google-app-engine-django troubles with fixtures

[walter]

I'm using google-app-engine-django, Django 1.2, dev_appengine 1.4.2.
Data I was add to the datastore via manage.py shell

When I try

python manage.py dumpdata myapp  fixture.json

I get a file with empty square brackets.

I created file manually
[
{
model:myapp.news,
pk:25,
fields:{
title:Title News Check One,
body:Body News Check One
}
}
]

After python manage.py loaddata myapp/fixtures/fixture.json

I've got DeserializationError: Invalid model identifier:
'myapp.news'

Next my attempt is fixtures = ['djengine.json'] in a TestCase
instance. And data didn't load again.

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Re: [google-appengine] Please reset my index

[Wim den Ouden]

http://code.google.com/p/googleappengine/issues/entry?template=Production%20issue

2011/3/4 Thomas Wiradikusuma wiradikus...@gmail.com

 Hi App Engine team,

 Can you please reset index for my app lelanggokil-hr? Thanks in
 advance :)

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Wim den Ouden
Custom Google App Engine http://code.google.com/intl/nl/appengine/ based
webapps https://neighborshare.appspot.com/.
Free open source neighborshare framework http://code.google.com/p/relat/.

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Re: [google-appengine] Re: Huge cold start times, up to 75 seconds!

[Simon Knott]

I've experienced this today as well:
2011-03-04 00:20:13.826 /daySummary/get 200 33245ms 6798cpu_ms 12api_cpu_ms

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[google-appengine] Re: Who do I ask to have a non-billable quota raised?

[Simon Knott]

For this kind of testing I think you're going to have to stump up the cash - 
I can't see why Google should give you additional free resources so that you 
don't look stupid in front of a client :)

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Re: [google-appengine] Re: Huge cold start times, up to 75 seconds!

[Mauro Asprea]

this is happening to me too. Today seems to be more responsive than
yesterday (6-12 secs)

On Fri, Mar 4, 2011 at 10:38 AM, Simon Knott knott.si...@gmail.com wrote:

 I've experienced this today as well:
 2011-03-04 00:20:13.826 /daySummary/get 200 33245ms 6798cpu_ms
 12api_cpu_ms

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Mobile: +34 654297582
Skype: mauro.asprea
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cosas que nunca fueron y se preguntan por qué no?.
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[google-appengine] Channel API encoding problem

[dilbert]

When using the Channel API and sending messages with Croatian letters (e.g. 
message šđžčćŠĐŽČĆ) the message received on the client gets mangled. The 
message I receive on the client looks like this: message ??. Has 
anyone had a similar issue. Is there a way to configure the Channel API so I 
get the proper message on the client side?

Thanks for your help.

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Re: [google-appengine] Re: Attempting to guarantee a write

[Stephen]

On Fri, Mar 4, 2011 at 12:26 AM, Richard Arrano rickarr...@gmail.com wrote:

 I had an idea that it might be able to be implemented in the
 form of something along the lines of 1MB unevictable
 memcache storage;


You could do this with a persistent server:

  https://groups.google.com/forum/#!topic/google-appengine/Gukw_nOHT90

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Re: [google-appengine] Trouble using appspot with google docs

[Joshua Smith]

Thanks, that was the issue.  Apparently the docs which say that registration is 
Optional, are out of date.

On Mar 3, 2011, at 6:26 PM, Robert Kluin wrote:

 It is probably talking about:
   http://code.google.com/apis/accounts/docs/RegistrationForWebAppsAuto.html
 
 I just checked one of my (registered) apps from appspot.com, I did not seem 
 to have any issues.
 
 
 Robert
 
 
 
 
 
 On Thu, Mar 3, 2011 at 17:01, Joshua Smith joshuaesm...@charter.net wrote:
 My town library is using a google docs survey to capture book request forms.  
 These get dropped into a spreadsheet.
 
 The person who handles these requests was intimidated by the spreadsheet, so 
 I whipped up a little web interface to show her the data in a form that looks 
 like the paper they used to use.
 
 This worked fine for a couple weeks, but we're suddenly getting this message:
 The page you have requested cannot be displayed. Another site was requesting 
 access to your Google Account, but sent a malformed request. Please contact 
 the site that you were trying to use when you received this message to inform 
 them of the error. A detailed error message follows:
 
 The site http://appspot.com; has not been registered.
 
 When I connect from the local SDK, I get:
 
 The site localhost is requesting access to your Google Account for the 
 product(s) listed below. 
 
 writely20x20.gifGoogle Docs
 If you grant access, you can revoke access at any time under 'My Account'. 
 localhost will not have access to your password or any other personal 
 information from your Google Account. Learn more 
 
 warning.gif This website is registered with Google to make authorization 
 requests, but has not been configured to send requests securely. We recommend 
 that you continue the process only if you trust the following destination:
 
  http://localhost:8906/token 
 
 
 Did google change something on purpose?
 
 If so, what is the fix?  Do I need to move this little utility into a domain? 
  Any idea what it means to be registered?  (I know that's a Google Docs API 
 question more than an appengine question.)
 
 -Joshua
 
 
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[google-appengine] Question about download_app admin access to application

[fedex1]

First of all, thanks for AppEngine!

I notice that  appcfg.py download_app limits the download to the
developer that uploads it.

Would it be possible to allow the owner of the application to also
download the application.

That would be very helpful to allow the owner to help the developer.

I know that it may be better to use true source control, but appcfg.py
download_app is better for very simple cases

Thanks,
Ralph

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[google-appengine] Re: Attempting to guarantee a write

[stevep]

Richard wrote:

Something that occurred to me that might help you was I was actually
considering de-isolating the datastore as a single point of failure
by
additionally sending out those really high importance writes via XMPP
to some other server.

Absolutely agree. Amazon Web Services is perfect.

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[google-appengine] Re: HR Vs. Master-Slave Comparison. Is it worth extra cost?

[stevep]

Hi Ikai,

Don't usually comment on threads going in this direction. But noted
that you seem on edge a bit.

First wanted to say how important your contributions are. I'm sure it
is hard to be in meetings and then try to provide insights to the
forum in a manner that keeps Legal happy.

Myself, I am very encouraged by HR -- MS did not seem to be panning
out.

Cheeers,
stevep

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RE: [google-appengine] Re: Who do I ask to have a non-billable quota raised?

[Brandon Wirtz]

There are quotas other than the ones you pay for.   Yes we are already
running on the pay version, and have set daily budgets at 20x what the best
day has been so far.

 

For other clients we used to hit non-billable quotas from time to time,
when it looked like a DOS rather than the client appeared on a talk show.

 

From: google-appengine@googlegroups.com
[mailto:google-appengine@googlegroups.com] On Behalf Of Simon Knott
Sent: Friday, March 04, 2011 1:41 AM
To: google-appengine@googlegroups.com
Subject: [google-appengine] Re: Who do I ask to have a non-billable quota
raised?

 

For this kind of testing I think you're going to have to stump up the cash -
I can't see why Google should give you additional free resources so that you
don't look stupid in front of a client :)

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Re: [google-appengine] Re: HR Vs. Master-Slave Comparison. Is it worth extra cost?

[Wim den Ouden]

+1

2011/3/4 stevep prosse...@gmail.com

 Hi Ikai,

 Don't usually comment on threads going in this direction. But noted
 that you seem on edge a bit.

 First wanted to say how important your contributions are. I'm sure it
 is hard to be in meetings and then try to provide insights to the
 forum in a manner that keeps Legal happy.

 Myself, I am very encouraged by HR -- MS did not seem to be panning
 out.

 Cheeers,
 stevep

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-- 
gr,
Wim den Ouden
Custom Google App Engine http://code.google.com/intl/nl/appengine/ based
webapps https://neighborshare.appspot.com/.
Free open source neighborshare framework http://code.google.com/p/relat/.

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Re: [google-appengine] Re: Who do I ask to have a non-billable quota raised?

[Robert Kluin]

500QPS is 43,200,000 requests / day (which is the default quota);  to
get that lifted Googlers usually ask that you submit a billing support
issue explaining your need for the increase.

Don't forget to mention any other quotas you're close to hitting ;)



Robert






On Fri, Mar 4, 2011 at 04:40, Simon Knott knott.si...@gmail.com wrote:
 For this kind of testing I think you're going to have to stump up the cash -
 I can't see why Google should give you additional free resources so that you
 don't look stupid in front of a client :)

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RE: [google-appengine] Re: Who do I ask to have a non-billable quota raised?

[Brandon Wirtz]

Client has a lousy web designer (from an html perspective), so we may get
there... each page has 102-106 objects so 500k visitors (not improbable)
would get us there.

You'd think they'd put a  contact billing support button in the Dashboard
somewhere :-)


-Original Message-
From: google-appengine@googlegroups.com
[mailto:google-appengine@googlegroups.com] On Behalf Of Robert Kluin
Sent: Friday, March 04, 2011 8:23 AM
To: google-appengine@googlegroups.com
Subject: Re: [google-appengine] Re: Who do I ask to have a non-billable
quota raised?

500QPS is 43,200,000 requests / day (which is the default quota);  to get
that lifted Googlers usually ask that you submit a billing support issue
explaining your need for the increase.

Don't forget to mention any other quotas you're close to hitting ;)



Robert






On Fri, Mar 4, 2011 at 04:40, Simon Knott knott.si...@gmail.com wrote:
 For this kind of testing I think you're going to have to stump up the 
 cash - I can't see why Google should give you additional free 
 resources so that you don't look stupid in front of a client :)

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Re: [google-appengine] Channel API encoding problem

[Robert Kluin]

Is the message correctly encoded?






On Fri, Mar 4, 2011 at 08:33, dilbert dilbert.elbo...@gmail.com wrote:
 When using the Channel API and sending messages with Croatian letters (e.g.
 message šđžčćŠĐŽČĆ) the message received on the client gets mangled. The
 message I receive on the client looks like this: message ??. Has
 anyone had a similar issue. Is there a way to configure the Channel API so I
 get the proper message on the client side?

 Thanks for your help.

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[google-appengine] Google Checkout

[anton savchuk]

Guys what about this stuff - Google Checkout?

I hope soon I will have paid service.. And users of mine suppose to pay for 
staff.. If I create registration or authentication based on Google Account 
will this user have possibility to pay use Google Checkout API or stuff like 
this? Or PayPal ? I do not know.. :(
Please advice about this problem. How can I organize payments from users to 
me ?

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Re: [google-appengine] Question about download_app admin access to application

[Robert Kluin]

Use source control.  Being able to download code is *not* a substitute
for source control, you can get a private repository on bitbucket or
github for free.  If your developers aren't using source control,
train them or get more experienced / better developers.


Here is a lengthly thread discussing the topic:
http://groups.google.com/group/google-appengine/browse_thread/thread/f79670c37defc6ec/9a51496c7841a0e7?lnk=gstq=download+code#9a51496c7841a0e7

There have been many discussions about this on the lists:
http://groups.google.com/group/google-appengine/search?group=google-appengineq=download+codeqt_g=Search+this+group



Robert




On Fri, Mar 4, 2011 at 10:27, fedex1 fed...@gmail.com wrote:
 First of all, thanks for AppEngine!

 I notice that  appcfg.py download_app limits the download to the
 developer that uploads it.

 Would it be possible to allow the owner of the application to also
 download the application.

 That would be very helpful to allow the owner to help the developer.

 I know that it may be better to use true source control, but appcfg.py
 download_app is better for very simple cases

 Thanks,
 Ralph

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Re: [google-appengine] Channel API encoding problem

[dilbert]

Not really sure what you mean. I use the following to send the message:
https://groups.google.com/forum/?show_docid=074d568de0a59f7a#%21topic/google-appengine/3u2eW0xgLpU
  
ChannelServiceFactory.getChannelService().sendMessage(new 
ChannelMessage(key, message šđžčćŠĐŽČĆ));

Thanks for the help.

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[google-appengine] app engine service not going away

[Vivek Kumar]

 I added a google app engine hosted app to this domain. now after that i m 
trying to disable it and it doesnt happen. tried multiple times and also 
waited for hours to happen. please advise

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Re: [google-appengine] Re: can we assume time is sync across all servers?

[Calvin]

I haven't experienced time-sync issues. I just know that it would be a 
problem if I did, so I developed a contingency hack.

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[google-appengine] Re: Multiple inequality filters on multiple properties

[nacho]

I need to do queries with more than 1 inequality filter.

Adding new fields to then make an equality filter, for example, quarters 
or price ranges is the best approach? And after the query filter the results 
by code?

It doesn't looks very nice. It looks a little dirty to me.

How do you handle situations like this?

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[google-appengine] Re: Google Checkout

[Geoffrey Spear]

On Mar 4, 11:52 am, anton savchuk anton.antoh...@gmail.com wrote:
 Guys what about this stuff - Google Checkout?

 I hope soon I will have paid service.. And users of mine suppose to pay for
 staff.. If I create registration or authentication based on Google Account
 will this user have possibility to pay use Google Checkout API or stuff like
 this? Or PayPal ? I do not know.. :(
 Please advice about this problem. How can I organize payments from users to
 me ?

App Engine doesn't include any integration of either Checkout or
Paypal; how you authenticate your users to your app doesn't matter at
all in how you get them to pay, since you'll need to use third-party
libraries to handle the payment processing anyway.

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[google-appengine] Multiple apps billing in quick succession and being declined by our bank.

[marxy]

We have three apps and it seems that they generate a charge to our credit 
card of the same amount each in quick succession. Our bank interprets this 
as an error and declines the second and third charges.

We got this email for the second and third charges:

Your Google Order # X withGoogle Services is currently on hold. An 
attempt to charge your MASTERCARD xxx- for USD2.10 on 27 Feb failed. 
This may have occurred because of insufficient funds, or as a precautionary 
measure against fraud. You may see authorisations on your billing statement 
for a declined charge. Occasionally, the authorisation for a charge may be 
approved, but the actual charge for the order declined. Contact the customer 
service department for MASTERCARD xxx- for help with resolving this 
payment issue. 

(I've added some XXXs).

I can't see a way to retry these charges, any suggestions on how to overcome 
this issue?

It would be nice if Google checkout could bundle up multiple close 
transactions into a single charge (I know Apple does this).

Best wishes,

Peter

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[google-appengine] 最佳搜尋方式

[Albert]

如何利用GAE資料庫(Big Table)做模糊搜尋，減少CPU Time的浪費？

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[google-appengine] Re: chrome to device question

[maxsap]

Anyone?

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Re: [google-appengine] app engine service not going away

[Gary Eberhart]

My experience is your app is likely disabled. To get it to go out of your
Google Apps Dashboard you will need to delete the GAE application and wait
for the three days for it to be actually deleted.

On Fri, Mar 4, 2011 at 10:20 AM, Vivek Kumar v...@sakshum.org wrote:

  I added a google app engine hosted app to this domain. now after that i m
 trying to disable it and it doesnt happen. tried multiple times and also
 waited for hours to happen. please advise

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Re: [google-appengine] Question about download_app admin access to application

[Gary Eberhart]

I use assemble.com and Mecurial. I use assembla because my source is not
open source and therefore the free solutions will not work for me. Source
control is the only way to go even if there is only one developer. The
advantages are many!

On Fri, Mar 4, 2011 at 9:52 AM, Robert Kluin robert.kl...@gmail.com wrote:

 Use source control.  Being able to download code is *not* a substitute
 for source control, you can get a private repository on bitbucket or
 github for free.  If your developers aren't using source control,
 train them or get more experienced / better developers.


 Here is a lengthly thread discussing the topic:

 http://groups.google.com/group/google-appengine/browse_thread/thread/f79670c37defc6ec/9a51496c7841a0e7?lnk=gstq=download+code#9a51496c7841a0e7

 There have been many discussions about this on the lists:

 http://groups.google.com/group/google-appengine/search?group=google-appengineq=download+codeqt_g=Search+this+group



 Robert




 On Fri, Mar 4, 2011 at 10:27, fedex1 fed...@gmail.com wrote:
  First of all, thanks for AppEngine!
 
  I notice that  appcfg.py download_app limits the download to the
  developer that uploads it.
 
  Would it be possible to allow the owner of the application to also
  download the application.
 
  That would be very helpful to allow the owner to help the developer.
 
  I know that it may be better to use true source control, but appcfg.py
  download_app is better for very simple cases
 
  Thanks,
  Ralph
 
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[google-appengine] Runaway Tasks

[Benjamin]

I have a Task that's purpose is to chew away at data that needs to be
deleted. I have millions of records that need to go, so the task uses
the low level api and key only queries to grab 1000 delete them and
restart the task until the remaining count is zero.

The task is set to 5/sec with a bucket size of 5. The other day it
skyrocketed my CPU usage and maxed out my 5$ quota (400 CPU seconds /
second, i think the lights in New York dimmed).  Am i missing some
setting here? How do i keep a task queue chugging along at a fixed
rate without a burst like that, regardless of how many tasks are in
the queue?

Thanks!

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Re: [google-appengine] AppSec or Penetration testing?

[Ikai Lan (Google)]

Do you have any more information about what it is you're going to be doing?
I can flag our team and make them aware of it.

Ikai Lan
Developer Programs Engineer, Google App Engine
Blog: http://googleappengine.blogspot.com
Twitter: http://twitter.com/app_engine
Reddit: http://www.reddit.com/r/appengine



On Fri, Mar 4, 2011 at 9:44 AM, Ben bhym...@gmail.com wrote:

 DOes anyone know if Google has any official policy around performing
 an Application Security assessment or Penetration Test against my
 own app on appengine?  I can't seem to locate any info in the TOS or
 the groups/forums.  I don't wan't to start sending malicious looking
 test requests to my app only to have google shut me down because they
 think it is an actual attack.  Any info would be appreciated!

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[google-appengine] Re: Help making query faster

[Benjamin]

Thanks Robert, what i ended up doing was limiting the request to 1000
at a time and then making more round trips to build a collection until
the result was zero.

On Jan 12, 2:18 pm, Robert Kluin robert.kl...@gmail.com wrote:
 Hi Ben,
   How many records are you fetching at a time?  Perhaps you want to
 limit the results you present at one time to 20 (or some other
 reasonable number), then use cursors to facilitate paging?

 Robert







 On Tue, Jan 11, 2011 at 13:15, Benjamin bsaut...@gmail.com wrote:
  Hi Everyone,

  A little challenge for the day - If I have many millions of an object
  persisted in the datastore that have an two properties: a long value
  and a date, and I want to query for a subset of those object that have
  the same long value, and a date that falls between a start and end
  date range.

  This is how i'm doing it:

                                 q = pm.newQuery(RecordedValue.class,
                                 pointFK== k  timestamp = sd  timestamp 
  = ed);
                                 q.declareImports(import java.util.Date);
                                 args = new HashMapString, Object();
                                 args.put(k, point.getId());
                                 args.put(sd, startDate);
                                 args.put(ed, endDate);

                                 q.declareParameters(String k, Date sd, Date 
  ed);
                                 q.setOrdering(timestamp descending);
                                 data = (ListRecordedValue) q
                                 .executeWithMap(args);

  My users are experiencing hard deadline exceeded errors when trying
  to pull this data. I was wondering if there was a better, more magical
  way to do this query, or can i improve things with a better index
  definition in my datastore-indexes file.

  Thanks!

  Ben

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[google-appengine] Re: Google Checkout

[anton savchuk]

I see.. thank you. Could you recommend some third-party libraries? 

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Re: [google-appengine] Re: Huge cold start times, up to 75 seconds!

[Ikai Lan (Google)]

Robert, when you say 5-10% of the time, do you mean 5-10% of your loading
requests or 5-10% of your overall requests?

Ikai Lan
Developer Programs Engineer, Google App Engine
Blog: http://googleappengine.blogspot.com
Twitter: http://twitter.com/app_engine
Reddit: http://www.reddit.com/r/appengine



On Thu, Mar 3, 2011 at 7:47 PM, Robert Kluin robert.kl...@gmail.com wrote:

 I see occasional issues with this too.  Here a a few samples from
 about 12 hours ago, same URL:

  My typical loading request:
ms=228 cpu_ms=222 api_cpu_ms=82 cpm_usd=0.006245 loading_request=1

  I see these maybe 15% of the time:
ms=6667 cpu_ms=358 api_cpu_ms=8 cpm_usd=0.010137 loading_request=1

  And these maybe 5% to 10%, depending on the day:
ms=421495 cpu_ms=380 api_cpu_ms=77 cpm_usd=0.010744
 loading_request=1 pending_ms=14


  I've also went through a period of a couple weeks where this app was
 seeing about 95% of the loading requests like the last one.  Same code
 base (last update to it was about 110 days ago).


 Robert






 On Thu, Mar 3, 2011 at 21:01, Gary Eberhart happycatmad...@gmail.com
 wrote:
  I had the same issues. However, paying the .30 cents per day to keep 3
  instances of my app running has made a huge difference.
 
  On Thu, Mar 3, 2011 at 5:29 PM, Petey brianpeter...@gmail.com wrote:
 
  I'm seeing the same thing in the last couple of days. Requests that
  normally take under a second are taking longer than 15 seconds.
 
  An example from my logs:
 
   2011-03-03 16:25:01.114 GET /friends 200 real=22788ms cpu=52549ms
  api=260ms overhead=0ms (5 RPCs)
 
  And it's only running 3 Gets and 2 Queries.
 
  On Mar 3, 9:43 am, Spines kwste...@gmail.com wrote:
   More info:
  
   My cpu_ms for cold starts is consistently between 7 and 9 seconds, yet
   the actual time it takes to respond fluctuates from 8 to 75 seconds.
  
   Log lines:
   2011-03-03 09:36:26.620 /?tab=recenteditsajax=true 200 47085ms
   8873cpu_ms 30api_cpu_ms
   2011-03-03 09:25:38.135 /?tab=popularajax=true 200 39145ms 8640cpu_ms
   30api_cpu_ms
   2011-03-03 07:38:15.167 /?tab=needshelpajax=true 200 17632ms
   8476cpu_ms 30api_cpu_ms
   2011-03-03 07:18:03.143 /?tab=newajax=true 200 75680ms 8896cpu_ms
   30api_cpu_ms
 
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Re: [google-appengine] Please reset my index

[Ikai Lan (Google)]

Your indexes are serving. What are you asking for?

Ikai Lan
Developer Programs Engineer, Google App Engine
Blog: http://googleappengine.blogspot.com
Twitter: http://twitter.com/app_engine
Reddit: http://www.reddit.com/r/appengine



On Thu, Mar 3, 2011 at 6:14 PM, Thomas Wiradikusuma
wiradikus...@gmail.comwrote:

 Hi App Engine team,

 Can you please reset index for my app lelanggokil-hr? Thanks in
 advance :)

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Re: [google-appengine] Re: HR Vs. Master-Slave Comparison. Is it worth extra cost?

[Ikai Lan (Google)]

I'd like to highlight that we're not stubborn enough to admit we were right
all along, because we weren't. It's unrealistic to think that someone gets
something right the first time, and we're no different. High replication is
our admission that the problem isn't that we can't get the average error
rate down, the problem is that we can bring it down but we can't eliminate
datastore latency spikes.

As far as eventual consistency goes, our users that are on high replication
have not seen any issues. If we weren't always fussing about transparency,
we would probably have been able to not even bring it up, and it's unlikely
anyone would have noticed - we just figured it'd make more sense to
communicate it, though now we are seeing that users are overreacting a bit.
Did you know index creation is also asynchronous? That is, when you save a
property, it returns before indexes have been created? Technically, this
constitutes a consistency issue, but it has no real world impact because it
is instantaneous. We documented eventual consistency issues because they are
an order of magnitude slower than asynchronous index creation, so in some
small cases of write an entity then do a cross entity group query the
query results will be off. If you've run any kind of SQL service at scale
that replicates to a read-slave, you should be used to this pattern of
persistence.

We plan on setting High Replication as the default for all new applications.
It's not quite removing it, but perhaps we will explore that direction,
though we are current hesitant to do so.

We also plan on having some guest blog posts ... soon. If we had the
manpower, we would work with each and every one of you to migrate over, then
help you benchmark. Unfortunately, we can't. We can, however, try to publish
as much data as we have as it comes in. I think the most useful data here
will be data from third-parties. As far as our tests go, everything seems
alright, but I'm pretty sure you'll all have more confidence in the results
if they're being written by users whose entire businesses depend on the
reliability and performance of App Engine.

Spines: Please link me to where the documentation says that master/slave is
the best option so we can fix it. To answer your question: yes, High
Replication mitigates the impact of datastore spikes, and provides a path
for us to pretty much eliminate them altogether.

Lastly, I want to apologize if I came off as irate. I'm usually quick to
respond emotionally, and the damn undo send button went away too quickly
in my gmail. I don't mean to shut down any kind of joking around, but do
remember that this group is internationally read. Sarcasm doesn't come off
well in email, and it comes off 10x more confusing for non-native English
speakers. If there's any chance any of you guys are coming to Pycon in
Atlanta next week, Wesley and I will be there. Let's smooth things over with
some drinks/food =).

Ikai Lan
Developer Programs Engineer, Google App Engine
Blog: http://googleappengine.blogspot.com
Twitter: http://twitter.com/app_engine
Reddit: http://www.reddit.com/r/appengine



On Thu, Mar 3, 2011 at 6:37 PM, Darien Caldwell
darien.caldw...@gmail.comwrote:

 I'm kind of disappointed with Google's recent attitude change. When
 master/slave was all there was, it was deemed 'production worthy'. Now
 suddenly it's  If you are running a production service, you should
 not use Master/Slave datastore. Ever.

 Given that the HR datastore has some pretty big problems from a user
 perspective (costs 3 times more, only supports Eventual consistency),
 it's not really feasable to use for production code in *every*
 instance. So I'm very disappointed to hear these kinds of comments
 coming from Google. You shouldn't make something, then complain when
 people use it. If you don't want people using Master/Slave, maybe you
 should remove it.

 To berate customers for preferring an option you *provide* is just
 mind blowing.

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Re: [google-appengine] Re: can we assume time is sync across all servers?

[Ikai Lan (Google)]

I'm trying to think of a solution that doesn't involve fetching data from a
third party time service, but I'm drawing a blank. How did you detect the
time skew in the first place?

Ikai Lan
Developer Programs Engineer, Google App Engine
Blog: http://googleappengine.blogspot.com
Twitter: http://twitter.com/app_engine
Reddit: http://www.reddit.com/r/appengine



On Thu, Mar 3, 2011 at 4:57 PM, Eric Ka Ka Ng ngk...@gmail.com wrote:

 Hi Gopal, Calvin, and Ikai,

 thx all for your sharing. Calvin, your handy script implements Gopal idea
 could be very useful to many of us ;)

 Ikai, yes, later we could do more testing and sampling, and with Calvin's
 script, to log the time (and delta with google time) however, this is not a
 problem frequently happen and we are currently busying with some other
 application dev tasks, guess it may take some time to log and analyze this
 problem, and would keep you posted. just thinking what kinds of 'examples'
 we could provide? (you want log? data in DS? script to produce the log /
 data? )


 btw, how could we explain Brett's data pipelines' talk at 35:50 or i
 interpret wrongly? and i believe Gopal, Calvin faced time sync issues and
 thus have the idea and implementation to solve this (just me recently aware
 about this problem). how much time is off did you experience?

 thx a lot!

 - eric

 On 4 March 2011 03:12, Ikai Lan (Google) ika...@google.com wrote:

 Can you provide examples where the time is off by 30 minutes? This seems
 incorrect.

 There's definitely clock skew, but we're talking milliseconds, seconds or
 at worst, worst, worst maybe a minute or two.

 Ikai Lan
 Developer Programs Engineer, Google App Engine
 Blog: http://googleappengine.blogspot.com
 Twitter: http://twitter.com/app_engine
 Reddit: http://www.reddit.com/r/appengine



 On Thu, Mar 3, 2011 at 5:54 AM, Ng Ka Ka Eric ngk...@gmail.com wrote:

 Hi Raymond,

 Just watched the video. Thx for pointing this reference.


 I really didnt expect that the machines are not time synced (can be off
 for 40mins?!) are there any technical difficulties to sync them? And in this
 case, for whatever reason if we want to record the time when the request is
 made into DS, how can we do that?

 - eric

 Sent from my iPhone

 On 2011年3月3日, at 下午6:20, Raymond C. windz...@gmail.com wrote:

 According to Brett's data pipelines' talk (
 http://www.youtube.com/watch?v=zSDC_TU7rtc, around 35:50), its not

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Re: [google-appengine] Re: Google Checkout

[Chris Copeland]

I just recently completed a Google Checkout integration for my GAE app.  The
fact that you are on GAE makes no difference except that if you do a level 2
integration you will have to use your app-name.appspot.com URL for the
callbacks since Google Checkout requires the callback URL to be secure.

All that said, if I had it to do over, I would definitely go with Pay Pal
(or someone else).  Checkout seems to be an abandoned product within
Google.  There are long-standing bugs that prevent some users from paying
and support (even for merchants) is almost nonexistent.

-Chris

On Fri, Mar 4, 2011 at 1:01 PM, anton savchuk anton.antoh...@gmail.comwrote:

 I see.. thank you. Could you recommend some third-party libraries?

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Re: [google-appengine] Serving old static files when changing default version

[Calvin]

That's weird.  I sent that message 4 days ago, and it just showed up in the 
group digest today.

I hope the temporal vortex doesn't confuse anyone.

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Re: [google-appengine] Re: Google Checkout

[anton savchuk]

Oii.. it is good to know. thank you for this helpful information! 

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[google-appengine] Picasa, Youtube API

[anton savchuk]

I am wondering. has App Engine access for users picasa photos or Youtube 
video.. I mean kind of API? 

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Re: [google-appengine] Re: can we assume time is sync across all servers?

[saidimu apale]

From the gist:
- the difference between the time on AppEngine's proxy servers (as detected
in the response headers) and local time on AppEngine's serving machines.


local_now = datetime.utcnow()


 google_time = urlfetch.fetch('http://www.google.com/robots.txt', 
 method=urlfetch.HEAD)


 google_now = datetime.strptime(google_time.headers['date'], '%a, %d %b %Y 
 %H:%M:%S GMT')


 swatch_delta = local_now - google_now



This works if the proxy servers don't also have greatly varying clock-skew,
else the delta can swing in wildly unexpected ways.

saidimu

On Fri, Mar 4, 2011 at 2:13 PM, Ikai Lan (Google) ika...@google.com wrote:

 I'm trying to think of a solution that doesn't involve fetching data from a
 third party time service, but I'm drawing a blank. How did you detect the
 time skew in the first place?

 Ikai Lan
 Developer Programs Engineer, Google App Engine
 Blog: http://googleappengine.blogspot.com
 Twitter: http://twitter.com/app_engine
 Reddit: http://www.reddit.com/r/appengine



 On Thu, Mar 3, 2011 at 4:57 PM, Eric Ka Ka Ng ngk...@gmail.com wrote:

 Hi Gopal, Calvin, and Ikai,

 thx all for your sharing. Calvin, your handy script implements Gopal idea
 could be very useful to many of us ;)

 Ikai, yes, later we could do more testing and sampling, and with Calvin's
 script, to log the time (and delta with google time) however, this is not a
 problem frequently happen and we are currently busying with some other
 application dev tasks, guess it may take some time to log and analyze this
 problem, and would keep you posted. just thinking what kinds of 'examples'
 we could provide? (you want log? data in DS? script to produce the log /
 data? )


 btw, how could we explain Brett's data pipelines' talk at 35:50 or i
 interpret wrongly? and i believe Gopal, Calvin faced time sync issues and
 thus have the idea and implementation to solve this (just me recently aware
 about this problem). how much time is off did you experience?

 thx a lot!

 - eric

 On 4 March 2011 03:12, Ikai Lan (Google) ika...@google.com wrote:

 Can you provide examples where the time is off by 30 minutes? This seems
 incorrect.

 There's definitely clock skew, but we're talking milliseconds, seconds or
 at worst, worst, worst maybe a minute or two.

 Ikai Lan
 Developer Programs Engineer, Google App Engine
 Blog: http://googleappengine.blogspot.com
 Twitter: http://twitter.com/app_engine
 Reddit: http://www.reddit.com/r/appengine



 On Thu, Mar 3, 2011 at 5:54 AM, Ng Ka Ka Eric ngk...@gmail.com wrote:

 Hi Raymond,

 Just watched the video. Thx for pointing this reference.


 I really didnt expect that the machines are not time synced (can be off
 for 40mins?!) are there any technical difficulties to sync them? And in 
 this
 case, for whatever reason if we want to record the time when the request is
 made into DS, how can we do that?

 - eric

 Sent from my iPhone

 On 2011年3月3日, at 下午6:20, Raymond C. windz...@gmail.com wrote:

 According to Brett's data pipelines' talk (
 http://www.youtube.com/watch?v=zSDC_TU7rtc, around 35:50), its not

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Re: RE: [google-appengine] Re: Who do I ask to have a non-billable quota raised?

[Simon Knott]

Ah sorry Brandon, I misunderstood.

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Re: [google-appengine] Re: Huge cold start times, up to 75 seconds!

[Robert Kluin]

Hey Ikai,
  My numbers were all for loading requests.  Sorry, I should have been
more specific. :)

  Sometimes I also notice requests like the second one in my list
(ms=6667) for non-loading requests too.  But that is a small
single-digit percentage.



Robert








On Fri, Mar 4, 2011 at 14:08, Ikai Lan (Google) ika...@google.com wrote:
 Robert, when you say 5-10% of the time, do you mean 5-10% of your loading
 requests or 5-10% of your overall requests?
 Ikai Lan
 Developer Programs Engineer, Google App Engine
 Blog: http://googleappengine.blogspot.com
 Twitter: http://twitter.com/app_engine
 Reddit: http://www.reddit.com/r/appengine


 On Thu, Mar 3, 2011 at 7:47 PM, Robert Kluin robert.kl...@gmail.com wrote:

 I see occasional issues with this too.  Here a a few samples from
 about 12 hours ago, same URL:

  My typical loading request:
    ms=228 cpu_ms=222 api_cpu_ms=82 cpm_usd=0.006245 loading_request=1

  I see these maybe 15% of the time:
    ms=6667 cpu_ms=358 api_cpu_ms=8 cpm_usd=0.010137 loading_request=1

  And these maybe 5% to 10%, depending on the day:
    ms=421495 cpu_ms=380 api_cpu_ms=77 cpm_usd=0.010744
 loading_request=1 pending_ms=14


  I've also went through a period of a couple weeks where this app was
 seeing about 95% of the loading requests like the last one.  Same code
 base (last update to it was about 110 days ago).


 Robert






 On Thu, Mar 3, 2011 at 21:01, Gary Eberhart happycatmad...@gmail.com
 wrote:
  I had the same issues. However, paying the .30 cents per day to keep 3
  instances of my app running has made a huge difference.
 
  On Thu, Mar 3, 2011 at 5:29 PM, Petey brianpeter...@gmail.com wrote:
 
  I'm seeing the same thing in the last couple of days. Requests that
  normally take under a second are taking longer than 15 seconds.
 
  An example from my logs:
 
   2011-03-03 16:25:01.114 GET /friends 200 real=22788ms cpu=52549ms
  api=260ms overhead=0ms (5 RPCs)
 
  And it's only running 3 Gets and 2 Queries.
 
  On Mar 3, 9:43 am, Spines kwste...@gmail.com wrote:
   More info:
  
   My cpu_ms for cold starts is consistently between 7 and 9 seconds,
   yet
   the actual time it takes to respond fluctuates from 8 to 75 seconds.
  
   Log lines:
   2011-03-03 09:36:26.620 /?tab=recenteditsajax=true 200 47085ms
   8873cpu_ms 30api_cpu_ms
   2011-03-03 09:25:38.135 /?tab=popularajax=true 200 39145ms
   8640cpu_ms
   30api_cpu_ms
   2011-03-03 07:38:15.167 /?tab=needshelpajax=true 200 17632ms
   8476cpu_ms 30api_cpu_ms
   2011-03-03 07:18:03.143 /?tab=newajax=true 200 75680ms 8896cpu_ms
   30api_cpu_ms
 
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Re: [google-appengine] Question about download_app admin access to application

[Robert Kluin]

Gary, you might want to switch providers:  ASSEMBLE.COM is for sale.

Bitbucket offers private repositories on free accounts too.



Robert




On Fri, Mar 4, 2011 at 13:31, Gary Eberhart happycatmad...@gmail.com wrote:
 I use assemble.com and Mecurial. I use assembla because my source is not
 open source and therefore the free solutions will not work for me. Source
 control is the only way to go even if there is only one developer. The
 advantages are many!

 On Fri, Mar 4, 2011 at 9:52 AM, Robert Kluin robert.kl...@gmail.com wrote:

 Use source control.  Being able to download code is *not* a substitute
 for source control, you can get a private repository on bitbucket or
 github for free.  If your developers aren't using source control,
 train them or get more experienced / better developers.


 Here is a lengthly thread discussing the topic:

 http://groups.google.com/group/google-appengine/browse_thread/thread/f79670c37defc6ec/9a51496c7841a0e7?lnk=gstq=download+code#9a51496c7841a0e7

 There have been many discussions about this on the lists:

 http://groups.google.com/group/google-appengine/search?group=google-appengineq=download+codeqt_g=Search+this+group



 Robert




 On Fri, Mar 4, 2011 at 10:27, fedex1 fed...@gmail.com wrote:
  First of all, thanks for AppEngine!
 
  I notice that  appcfg.py download_app limits the download to the
  developer that uploads it.
 
  Would it be possible to allow the owner of the application to also
  download the application.
 
  That would be very helpful to allow the owner to help the developer.
 
  I know that it may be better to use true source control, but appcfg.py
  download_app is better for very simple cases
 
  Thanks,
  Ralph
 
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Re: [google-appengine] Question about download_app admin access to application

[Gary Eberhart]

Thanks for the info!

On Fri, Mar 4, 2011 at 12:52 PM, Robert Kluin robert.kl...@gmail.comwrote:

 Gary, you might want to switch providers:  ASSEMBLE.COM is for sale.

 Bitbucket offers private repositories on free accounts too.



 Robert




 On Fri, Mar 4, 2011 at 13:31, Gary Eberhart happycatmad...@gmail.com
 wrote:
  I use assemble.com and Mecurial. I use assembla because my source is not
  open source and therefore the free solutions will not work for me. Source
  control is the only way to go even if there is only one developer. The
  advantages are many!
 
  On Fri, Mar 4, 2011 at 9:52 AM, Robert Kluin robert.kl...@gmail.com
 wrote:
 
  Use source control.  Being able to download code is *not* a substitute
  for source control, you can get a private repository on bitbucket or
  github for free.  If your developers aren't using source control,
  train them or get more experienced / better developers.
 
 
  Here is a lengthly thread discussing the topic:
 
 
 http://groups.google.com/group/google-appengine/browse_thread/thread/f79670c37defc6ec/9a51496c7841a0e7?lnk=gstq=download+code#9a51496c7841a0e7
 
  There have been many discussions about this on the lists:
 
 
 http://groups.google.com/group/google-appengine/search?group=google-appengineq=download+codeqt_g=Search+this+group
 
 
 
  Robert
 
 
 
 
  On Fri, Mar 4, 2011 at 10:27, fedex1 fed...@gmail.com wrote:
   First of all, thanks for AppEngine!
  
   I notice that  appcfg.py download_app limits the download to the
   developer that uploads it.
  
   Would it be possible to allow the owner of the application to also
   download the application.
  
   That would be very helpful to allow the owner to help the developer.
  
   I know that it may be better to use true source control, but appcfg.py
   download_app is better for very simple cases
  
   Thanks,
   Ralph
  
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Re: [google-appengine] Question about download_app admin access to application

[Gary Eberhart]

Sorry. That would be assembla.com. I wish I could type as fast as I think I
can.

On Fri, Mar 4, 2011 at 1:00 PM, Gary Eberhart happycatmad...@gmail.comwrote:

 Thanks for the info!


 On Fri, Mar 4, 2011 at 12:52 PM, Robert Kluin robert.kl...@gmail.comwrote:

 Gary, you might want to switch providers:  ASSEMBLE.COM is for sale.

 Bitbucket offers private repositories on free accounts too.



 Robert




 On Fri, Mar 4, 2011 at 13:31, Gary Eberhart happycatmad...@gmail.com
 wrote:
  I use assemble.com and Mecurial. I use assembla because my source is
 not
  open source and therefore the free solutions will not work for me.
 Source
  control is the only way to go even if there is only one developer. The
  advantages are many!
 
  On Fri, Mar 4, 2011 at 9:52 AM, Robert Kluin robert.kl...@gmail.com
 wrote:
 
  Use source control.  Being able to download code is *not* a substitute
  for source control, you can get a private repository on bitbucket or
  github for free.  If your developers aren't using source control,
  train them or get more experienced / better developers.
 
 
  Here is a lengthly thread discussing the topic:
 
 
 http://groups.google.com/group/google-appengine/browse_thread/thread/f79670c37defc6ec/9a51496c7841a0e7?lnk=gstq=download+code#9a51496c7841a0e7
 
  There have been many discussions about this on the lists:
 
 
 http://groups.google.com/group/google-appengine/search?group=google-appengineq=download+codeqt_g=Search+this+group
 
 
 
  Robert
 
 
 
 
  On Fri, Mar 4, 2011 at 10:27, fedex1 fed...@gmail.com wrote:
   First of all, thanks for AppEngine!
  
   I notice that  appcfg.py download_app limits the download to the
   developer that uploads it.
  
   Would it be possible to allow the owner of the application to also
   download the application.
  
   That would be very helpful to allow the owner to help the developer.
  
   I know that it may be better to use true source control, but
 appcfg.py
   download_app is better for very simple cases
  
   Thanks,
   Ralph
  
   --
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Re: [google-appengine] Picasa, Youtube API

[Gary Eberhart]

I don't know about picasa and youtube. However, I really like the
performance and usability of the Blobstore
http://code.google.com/appengine/docs/java/blobstore/overview.htmland the
ImageServiceFactory.

On Fri, Mar 4, 2011 at 12:42 PM, anton savchuk anton.antoh...@gmail.comwrote:

 I am wondering. has App Engine access for users picasa photos or Youtube
 video.. I mean kind of API?

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[google-appengine] Re: Picasa, Youtube API

[Calvin]

App Engine doesn't have any special APIs for access to other Google 
services, but any existing REST API should be usable on App Engine.

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Re: [google-appengine] Re: can we assume time is sync across all servers?

[Calvin]

Yeah, I can't find the thread where this was originally discussed, but the 
hack does make the assumption that Google is more careful about keeping the 
servers that serve 'www' requests in sync than they are about keeping the 
App Engine cluster in sync.

The best use of this would be to point it at a server that is under your 
control, and is always served by a single machine.  It should only query for 
time delta once when each App Engine instance is started up, so it shouldn't 
put that server under heavy load.

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[google-appengine] Re: Picasa, Youtube API

[anton savchuk]

Thank you guys for help!

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Re: [google-appengine] Re: HR Vs. Master-Slave Comparison. Is it worth extra cost?

[Gary Eberhart]

+1

On Fri, Mar 4, 2011 at 1:48 PM, Jeff Schwartz jefftschwa...@gmail.comwrote:

 I can't remember who said it but it went something like, The greatest
 failure is to not see the opportunities that come from failing! Oh, wait, I
 said it he he he.

 Ikai, you and all the other Googlers have nothing to feel defensive about.
 HR is obviously the chosen path and to ignore that is, well, foolish.

 Perhaps we don't say it often enough and you guys and gals (Googlers) don't
 get to hear it often enough and maybe we should say it more often but we are
 grateful for all the great technologies that you are enabling and allowing
 us to participate in and personally I just want to say thank you and tell
 you all how grateful I am.

 Jeff

 On Fri, Mar 4, 2011 at 2:06 PM, Ikai Lan (Google) ika...@google.comwrote:

 I'd like to highlight that we're not stubborn enough to admit we were
 right all along, because we weren't. It's unrealistic to think that someone
 gets something right the first time, and we're no different. High
 replication is our admission that the problem isn't that we can't get the
 average error rate down, the problem is that we can bring it down but we
 can't eliminate datastore latency spikes.

 As far as eventual consistency goes, our users that are on high
 replication have not seen any issues. If we weren't always fussing about
 transparency, we would probably have been able to not even bring it up, and
 it's unlikely anyone would have noticed - we just figured it'd make more
 sense to communicate it, though now we are seeing that users are
 overreacting a bit. Did you know index creation is also asynchronous? That
 is, when you save a property, it returns before indexes have been created?
 Technically, this constitutes a consistency issue, but it has no real world
 impact because it is instantaneous. We documented eventual consistency
 issues because they are an order of magnitude slower than asynchronous index
 creation, so in some small cases of write an entity then do a cross entity
 group query the query results will be off. If you've run any kind of SQL
 service at scale that replicates to a read-slave, you should be used to this
 pattern of persistence.

 We plan on setting High Replication as the default for all new
 applications. It's not quite removing it, but perhaps we will explore that
 direction, though we are current hesitant to do so.

 We also plan on having some guest blog posts ... soon. If we had the
 manpower, we would work with each and every one of you to migrate over, then
 help you benchmark. Unfortunately, we can't. We can, however, try to publish
 as much data as we have as it comes in. I think the most useful data here
 will be data from third-parties. As far as our tests go, everything seems
 alright, but I'm pretty sure you'll all have more confidence in the results
 if they're being written by users whose entire businesses depend on the
 reliability and performance of App Engine.

 Spines: Please link me to where the documentation says that master/slave
 is the best option so we can fix it. To answer your question: yes, High
 Replication mitigates the impact of datastore spikes, and provides a path
 for us to pretty much eliminate them altogether.

 Lastly, I want to apologize if I came off as irate. I'm usually quick to
 respond emotionally, and the damn undo send button went away too quickly
 in my gmail. I don't mean to shut down any kind of joking around, but do
 remember that this group is internationally read. Sarcasm doesn't come off
 well in email, and it comes off 10x more confusing for non-native English
 speakers. If there's any chance any of you guys are coming to Pycon in
 Atlanta next week, Wesley and I will be there. Let's smooth things over with
 some drinks/food =).

 Ikai Lan
 Developer Programs Engineer, Google App Engine
 Blog: http://googleappengine.blogspot.com
 Twitter: http://twitter.com/app_engine
 Reddit: http://www.reddit.com/r/appengine



 On Thu, Mar 3, 2011 at 6:37 PM, Darien Caldwell 
 darien.caldw...@gmail.com wrote:

 I'm kind of disappointed with Google's recent attitude change. When
 master/slave was all there was, it was deemed 'production worthy'. Now
 suddenly it's  If you are running a production service, you should
 not use Master/Slave datastore. Ever.

 Given that the HR datastore has some pretty big problems from a user
 perspective (costs 3 times more, only supports Eventual consistency),
 it's not really feasable to use for production code in *every*
 instance. So I'm very disappointed to hear these kinds of comments
 coming from Google. You shouldn't make something, then complain when
 people use it. If you don't want people using Master/Slave, maybe you
 should remove it.

 To berate customers for preferring an option you *provide* is just
 mind blowing.

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[google-appengine] Re: HR Vs. Master-Slave Comparison. Is it worth extra cost?

[Geoffrey Spear]

On Mar 4, 3:57 pm, Philippe Beaudoin philippe.beaud...@gmail.com
wrote:
 Forums posts could really use a thumb up feature to give a voice to the
 great silent minority.

Switch back to the old google groups interface, and you can give them
5 stars.  Which no one will see when they get rid of the old
interface. :)

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[google-appengine] Re: HR Vs. Master-Slave Comparison. Is it worth extra cost?

[Ugorji]

First of all, I just wanted to echo Jeff Schwartz's comment. Ikai, I think 
your response was very well thought out, for a thread which was close to 
going off-course. You nipped it right in the bud, while being clear about 
the reasons for careful dialogue. I appreciate that.

I've been following different threads and notes and documentation on HR 
Datastore. From these, I had also come to the conclusion that the eventual 
consistency issue was minimal because
- The write blocks while a replication to all the other sites is done in 
parallel
- However, other requests that go to the sites might see the old or new 
data.
- However, the stale data only exists until the write returns.
- The edge case is if there is a network disconnect with one of the other 
sites during the replication. Then it may have to catch up later.

If this is correct, then in the general scenario, all the sites are 
consistent when a write returns. 

Ikai, can you please confirm if this is more or less how it works. If so, 
then it may help alleviate people's concerns with the HR Datastore. 

Personally, my only concern with HR Datastore is that it is much more 
expensive than the MS, and also significantly more expensive than Amazon 
SimpleDB which promises the same features (HA, replication to multiple 
sites, etc) but at $0.25 per GB (while app engine charges $0.45 per GB for 
now). I understand that's a preliminary price till June/July when Google 
figures out what to charge, but I (and I reckon some other developers) would 
be more eager to jump on the HR Datastore option if the price difference 
wasn't so much. 

P.S. GAE was always cheaper than AWS and provided a richer development 
environment which made the decision easier for some of us. Just a thought.

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[google-appengine] Re: Move To High Replication / No Response from Billing Tickets

[Kaan Soral]

Yes,
I said I didn't get a reply, but It was a Gmail problem, now I see my
reply, arriving 2 days late because of problems

On Mar 4, 5:48 am, Raymond C. windz...@gmail.com wrote:
 I think you cannot request for a switch (at least for now), but you can
 request to create an alias for an existing application (released) to a new
 application which has been set to use HR.

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[google-appengine] Re: Google Checkout

[Kaan Soral]

Paypal is t extreme, www.x.com is a simplified version of Paypal
(an attempt to make it more developer friendly) but it is still too
extreme. There are 10-15 possible services with 90 page documents
each, no use case examples, no screen shots, no simple codes.
There are services like Social Gold (they have shut themselves down
and joined Google Checkout), SuperRewards, Tapjoy
There are payment providers, you can integrate them with 2-3 lines of
code.

These payment providers exist because Paypal makes it too extreme to
implement their service.
If you would like other people making %10-20 over you take the simple
route.

The biggest problem is that, even if you implement Paypal, it will not
be simple for users to pay you.

That's why I liked Social Gold because it provided direct credit card
payment. Quick and clean.

Anyway I applied for Google Checkout In-App payments beta, no replies
yet. I will check out standard Google Checkout now.

What is needed for apps is an In-App payment system that is both
simple for users and developers ...
(Payments, Subscriptions, they can all be handled with a simple iframe
payment / callback information structure)


On Mar 4, 9:26 pm, anton savchuk anton.antoh...@gmail.com wrote:
 Oii.. it is good to know. thank you for this helpful information!

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[google-appengine] Re: Google Checkout

[anton savchuk]

Yes I agree.. PayPal is extraordinary.. and he has more than one 90 page 
documents.. 

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Re: [google-appengine] Re: can we assume time is sync across all servers?

[Calvin]

I just discovered a previous invention that's similar to this idea:

http://www.adeptus-mechanicus.com/codex/htpdate/htpdate.html

They attempt to reduce inaccuracies by averaging multiple sources.  I 
suppose that if you checked three source you could exclude one if it 
differed wildly from the other two.

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Re: [google-appengine] Re: Google Checkout

[Gary Eberhart]

Clark Howard discourages the use of PayPal and I agree.

http://www.clarkhoward.com/news/scams-ripoffs/crooks-using-paypal-exploit-online-small-business-/nFhm/
http://www.clarkhoward.com/news/scams-ripoffs/crooks-using-paypal-exploit-online-small-business-/nFhm/

On Fri, Mar 4, 2011 at 2:58 PM, anton savchuk anton.antoh...@gmail.comwrote:

 Yes I agree.. PayPal is extraordinary.. and he has more than one 90 page
 documents..

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[google-appengine] Re: HR Vs. Master-Slave Comparison. Is it worth extra cost?

[nickmilon]

+ 1 to Ikai for making up and been so open.

and   some thoughts :

1) Before making HR de facto standard, a simple (just press a button
and wait - no need foor alias) migration path should be devised for
legacy MS appls.
2) Pricing - although new price can be acceptable for frequent used
data, it becomes prohibitive for some use cases that need to store
large volume of rarely used data for which access latency is not
critical.
So ...
May be the solution could be MS and HR available side by side to all
appls, though I am not sure if this is technically feasible.

Happy coding;-)


On Mar 4, 11:26 pm, Ugorji ugo...@gmail.com wrote:
 First of all, I just wanted to echo Jeff Schwartz's comment. Ikai, I think
 your response was very well thought out, for a thread which was close to
 going off-course. You nipped it right in the bud, while being clear about
 the reasons for careful dialogue. I appreciate that.

 I've been following different threads and notes and documentation on HR
 Datastore. From these, I had also come to the conclusion that the eventual
 consistency issue was minimal because
 - The write blocks while a replication to all the other sites is done in
 parallel
 - However, other requests that go to the sites might see the old or new
 data.
 - However, the stale data only exists until the write returns.
 - The edge case is if there is a network disconnect with one of the other
 sites during the replication. Then it may have to catch up later.

 If this is correct, then in the general scenario, all the sites are
 consistent when a write returns.

 Ikai, can you please confirm if this is more or less how it works. If so,
 then it may help alleviate people's concerns with the HR Datastore.

 Personally, my only concern with HR Datastore is that it is much more
 expensive than the MS, and also significantly more expensive than Amazon
 SimpleDB which promises the same features (HA, replication to multiple
 sites, etc) but at $0.25 per GB (while app engine charges $0.45 per GB for
 now). I understand that's a preliminary price till June/July when Google
 figures out what to charge, but I (and I reckon some other developers) would
 be more eager to jump on the HR Datastore option if the price difference
 wasn't so much.

 P.S. GAE was always cheaper than AWS and provided a richer development
 environment which made the decision easier for some of us. Just a thought.

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[google-appengine] Re: Problem using Users API

[Ernesto Karim Oltra]

That's not exactly the issue, or it doesn't matter at least. The
matter is the user have to input his mobile number, and he complains a
lot about it. They asked me for other ways to register without
entering the number, so I have to give them the url posted above. When
using the Don't have a Google Account?
Create an account now link, in the login page returned by
create_login_url() they are required to input the number to be able to
have their own account in google. Test it,

https://www.google.com/accounts/ServiceLogin?service=ahpassive=truecontinue=https://appengine.google.com/_ah/conflogin%3Fcontinue%3Dhttp://historypoint.appspot.com/ltmpl=gmahname=HistoryPointsig=23fcb9b39841f70c29d88d579e5c134a

Press Create an account now, and write some information, when you
click next, you are required to input mobile number. Tried right now
in my computer.

PD: If you don't want to enter information, simply highlight there are
a section in the first register page called Get started with Google
App Engine, when only registering for a simply google account.


On 4 mar, 05:19, Robert Kluin robert.kl...@gmail.com wrote:
 That is an interesting bug.  Are you sure they are getting sent to the
 google app engine account signup?

 There is a another bug which you may also want to 
 star:http://code.google.com/p/googleappengine/issues/detail?id=1781

 On Thu, Mar 3, 2011 at 16:12, Ernesto Karim Oltra







 ernestoka...@gmail.com wrote:
  Hi,

  Some of the users of my apps didn't have an account with google yet,
  so when they click the Login link pointing to create_login_url()
  they are redirected to google login page. There, below the login form
  there is a link to register if you don't have an account. Most of my
  clients use that link, and they have reported us google asked for
  their mobile number, as if they were registering to use app engine as
  a developer.

  Is there some way to avoid registering for using app engine when only
  wanted to acces an app? Only create a new account as in (without
  asking for mobile number):
 http://www.google.com/accounts/NewAccount

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[google-appengine] Use Bottle Python Framework with Google App Engine

[Rutwick]

Hey guys,

Bottle is an extremely small Python framework (71KB only!), comes with
a development server, a templating engine and supports Jinja2 and
Mako. You can use it for GAE too. Here's how:

http://blog.rutwick.com/use-bottle-python-framework-with-google-app-engine

Hope you find it useful!

Thanks,
Rutwick

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Re: [google-appengine] Re: HR Vs. Master-Slave Comparison. Is it worth extra cost?

[Jeff Schnitzer]

On Fri, Mar 4, 2011 at 1:07 PM, Darien Caldwell
darien.caldw...@gmail.com wrote:

 Eventual Consistency is really the #1 reason I'm reluctant to make any
 change to HR. I sell virtual goods, people pay real money for things
 that exist in the datastore. If they buy something, and it doesn't
 show up for minute/hours, I get complaints. Your reply seems to
 indicate that maybe Eventual Consistency isn't quite that
 inconsistent, but I haven't seen any data to express just how long
 things are out of sync, so I have to expect the worst.

If you have that kind of reliability requirement, you should be using
transactions - which provide consistency guarantees to boot.  If you
aren't using transactions, eventual consistency is likely far less of
a problem than the outright failures that the M/S datastore provides.

Jeff

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[google-appengine] Re: HR Vs. Master-Slave Comparison. Is it worth extra cost?

[Darien Caldwell]

On Mar 4, 12:48 pm, Jeff Schwartz jefftschwa...@gmail.com wrote:
 HR is obviously the chosen path and to ignore that is, well, foolish.

I think this is part of the problem too. Until today, I was never
aware there was a path to choose. Master/Slave always there, and
worked fine (at least from my perspective). HR was introduced as an
alternative, for people with Mission Critical needs. That is how it
was introduced, as an alternative, not as a replacement.

Then suddenly it's Master slave = bad out of left field. It's
understandable people may be shocked/confused.  Until today I never
understood HR to be the new, better way.

But now that I've been awakened to the writing on the wall for Master/
Slave, I guess I'll have to start looking at HR more seriously.

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Re: [google-appengine] Re: Google Checkout

[Duong BaTien]

Hi Jeff:

I will soon have to deal with this issue. It would be nice if you can
document your lesion learned, especially the best practice in regard to
local persistence with Ocjectify. Thanks for your effort and recently
released objectify-3.0x

Duong BaTien
DBGROUPS and BudhNet


On Fri, Mar 4, 2011 at 5:44 PM, Jeff Schnitzer j...@infohazard.org wrote:

 I'm about 80% through with both Google Checkout and Paypal integration
 for a pure-digital service.  I must say, Google Checkout is VERY
 disappointing - it seems to be an abandoned product.

  * The Java SDK doesn't even compile.
  * The binaries don't run on GAE (jaxb issues).
  * The documentation is not very helpful.

 Basically you have to do your own XML processing.  The fact that the
 server must submit to a valid HTTPS callback makes testing a pain in
 the ass - this requirement exists even for the sandbox.  I had to
 proxy through appengine *and* a cloud host ssh tunnel just to get the
 @#$%! payload to my Eclipse dev system.  Overall the whole experience
 feels janky and utterly fails to inspire trust.

 Say what you will about Paypal's evil eye and their confusing product
 line, at least the integration is going fairly smoothly.  It feels
 like 1990s technology but it works.  The most helpful advice I can
 offer:  Forget everything else on their stupid overmarketed website
 and go straight for Web Payments Standard.

 Tirade over.

 Jeff

 On Fri, Mar 4, 2011 at 11:22 AM, Chris Copeland ch...@cope360.com wrote:
  I just recently completed a Google Checkout integration for my GAE app.
 The
  fact that you are on GAE makes no difference except that if you do a
 level 2
  integration you will have to use your app-name.appspot.com URL for the
  callbacks since Google Checkout requires the callback URL to be secure.
 
  All that said, if I had it to do over, I would definitely go with Pay Pal
  (or someone else).  Checkout seems to be an abandoned product within
  Google.  There are long-standing bugs that prevent some users from paying
  and support (even for merchants) is almost nonexistent.
 
  -Chris
 
  On Fri, Mar 4, 2011 at 1:01 PM, anton savchuk anton.antoh...@gmail.com
  wrote:
 
  I see.. thank you. Could you recommend some third-party libraries?
 
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[google-appengine] Re: HR Vs. Master-Slave Comparison. Is it worth extra cost?

[stevep]

Hi Darien,

Darien wrote:
Eventual Consistency is really the #1 reason I'm reluctant to make
any
change to HR. I sell virtual goods, people pay real money for things
that exist in the datastore. If they buy something, and it doesn't
show up for minute/hours, I get complaints.

I don't want to waylay this discussion, but I'd *really* like to know
how you have you sales process structured. Is a quick overview
possible??

Many thanks in advance,
stevep

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Re: [google-appengine] Channel API encoding problem

[Robert Kluin]

I'm afraid I don't know enough about Java and how it handles unicode /
characters encodings.  Perhaps one of the Java people on the list can
offer some ideas.


Just an idea, have you tried specifying the characters with unicode
code-points (ie U+0042)?



Robert







On Fri, Mar 4, 2011 at 12:07, dilbert dilbert.elbo...@gmail.com wrote:
 Not really sure what you mean. I use the following to send the message:
   ChannelServiceFactory.getChannelService().sendMessage(new
 ChannelMessage(key, message šđžčćŠĐŽČĆ));

 Thanks for the help.

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Re: [google-appengine] Channel API encoding problem

[Philippe Beaudoin]

If you use unicode characters in an hardcoded string, I believe you have to 
make sure the file is stored in the right format. Right-click the file, 
then: Properties  Resources 

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Re: [google-appengine] Channel API encoding problem

[Philippe Beaudoin]

If you use unicode characters in an hardcoded string, I believe you have to 
make sure the file is stored in the right format. Right-click the file, 
then: Properties  Resources  Text file encoding  Other  UTF-8

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Re: [google-appengine] Re: Google Checkout

[Jeff Schnitzer]

There isn't much to say.  Do Paypal first, the documentation is better
and it requires fewer contortions.  You probably want to go straight
to the Web Payments Standard product.  Implement both PDT and IPN.

Jeff

On Fri, Mar 4, 2011 at 5:59 PM, Duong BaTien duong.bat...@gmail.com wrote:
 Hi Jeff:
 I will soon have to deal with this issue. It would be nice if you can
 document your lesion learned, especially the best practice in regard to
 local persistence with Ocjectify. Thanks for your effort and recently
 released objectify-3.0x
 Duong BaTien
 DBGROUPS and BudhNet

 On Fri, Mar 4, 2011 at 5:44 PM, Jeff Schnitzer j...@infohazard.org wrote:

 I'm about 80% through with both Google Checkout and Paypal integration
 for a pure-digital service.  I must say, Google Checkout is VERY
 disappointing - it seems to be an abandoned product.

  * The Java SDK doesn't even compile.
  * The binaries don't run on GAE (jaxb issues).
  * The documentation is not very helpful.

 Basically you have to do your own XML processing.  The fact that the
 server must submit to a valid HTTPS callback makes testing a pain in
 the ass - this requirement exists even for the sandbox.  I had to
 proxy through appengine *and* a cloud host ssh tunnel just to get the
 @#$%! payload to my Eclipse dev system.  Overall the whole experience
 feels janky and utterly fails to inspire trust.

 Say what you will about Paypal's evil eye and their confusing product
 line, at least the integration is going fairly smoothly.  It feels
 like 1990s technology but it works.  The most helpful advice I can
 offer:  Forget everything else on their stupid overmarketed website
 and go straight for Web Payments Standard.

 Tirade over.

 Jeff

 On Fri, Mar 4, 2011 at 11:22 AM, Chris Copeland ch...@cope360.com wrote:
  I just recently completed a Google Checkout integration for my GAE app.
  The
  fact that you are on GAE makes no difference except that if you do a
  level 2
  integration you will have to use your app-name.appspot.com URL for the
  callbacks since Google Checkout requires the callback URL to be secure.
 
  All that said, if I had it to do over, I would definitely go with Pay
  Pal
  (or someone else).  Checkout seems to be an abandoned product within
  Google.  There are long-standing bugs that prevent some users from
  paying
  and support (even for merchants) is almost nonexistent.
 
  -Chris
 
  On Fri, Mar 4, 2011 at 1:01 PM, anton savchuk anton.antoh...@gmail.com
  wrote:
 
  I see.. thank you. Could you recommend some third-party libraries?
 
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Re: [google-appengine] Re: Multiple inequality filters on multiple properties

[Robert Kluin]

You can use one inequality filter per query, so your only other choice
is to filter in code somehow.  Adding a new field to indicate that an
entity is within some range lets you push some of that work to the
datastore / indexes.




Robert






On Fri, Mar 4, 2011 at 12:54, nacho vela.igna...@gmail.com wrote:
 I need to do queries with more than 1 inequality filter.

 Adding new fields to then make an equality filter, for example, quarters
 or price ranges is the best approach? And after the query filter the results
 by code?

 It doesn't looks very nice. It looks a little dirty to me.

 How do you handle situations like this?

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[google-appengine] Re: Please reset my index

[Thomas Wiradikusuma]

@Wim den Ouden

Thanks, I will bookmark this :)

@Ikai

If you look at my index (appid: lelanggokil-hr), Payment has 2
indices, but the first one (with ancestor) is no longer valid.
Initially I made Payment child of Member, now I remove the
relationship. But the index is still there.

Is this harmless?


On Mar 5, 3:11 am, Ikai Lan (Google) ika...@google.com wrote:
 Your indexes are serving. What are you asking for?

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Re: [google-appengine] Re: Please reset my index

[Robert Kluin]

Thomas,
   
http://code.google.com/appengine/docs/python/tools/uploadinganapp.html#Deleting_Unused_Indexes

   Remove the index from index.yaml, then appcfg.py vacuum_indexes .


  Similar docs for java:

http://code.google.com/appengine/docs/java/tools/uploadinganapp.html#Deleting_Unused_Indexes



Robert








On Fri, Mar 4, 2011 at 22:46, Thomas Wiradikusuma
wiradikus...@gmail.com wrote:
 @Wim den Ouden

 Thanks, I will bookmark this :)

 @Ikai

 If you look at my index (appid: lelanggokil-hr), Payment has 2
 indices, but the first one (with ancestor) is no longer valid.
 Initially I made Payment child of Member, now I remove the
 relationship. But the index is still there.

 Is this harmless?


 On Mar 5, 3:11 am, Ikai Lan (Google) ika...@google.com wrote:
 Your indexes are serving. What are you asking for?

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Re: [google-appengine] Re: Google Checkout

[anton savchuk]

Yes, more likely PayPal will be decision.. He really does work..

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