I have been trying to write 12,000 objects in a single page request.
These objects are all very small and the total amount of memory is not
large. There is no index on these objects - the only GQL queries I
make on them are based on the primary key.
Ikai has said: That is - if you have to
Same problem
On Feb 23, 10:21 pm, Scott Hernandez scotthernan...@gmail.com wrote:
I got a read error when I tried running with my existing (v1.3.0)
data-store file; I created a new one (by renaming the old one) and
restarting. I suspect the internal format is different and the old
format
I can offer only listing solution, based on our free GQL dynamic
parser - http://audao.spoledge.com/download.jsp
The full JSP you can find here:
http://vaclavb.blogspot.com/2010/02/google-app-engine-data-viewer-gql-java.html
The GQL parser (class GqlDynamic) converts GQL queries into low-level
Last Wednesday, the App Engine team hosted the latest session of its
bimonthly IRC office hours. A transcript of the session and a summary
of the topics covered is provided below. The next session will take
place next Wednesday, March 3rd from 7:00-8:00 p.m. PST in the
#appengine channel on
The high-level summary and complete transcript of the February 3rd
edition of the IRC office hours is pasted below. Please join us on the
first and third Wednesday of every month in the #appengine channel on
irc.freenode.net. On the first Wednesday, we meet in the channel from
7:00-8:00 p.m. PST
Hi,
I am trying to send email for every hour.
i write the code of cron.xml like above.But now the admin console
shows status as follows.
Cron Job Schedule/Last Run/Last Status (All
times are UTC)
/emailing
repeated every one hour every 1 hours (UTC)
The following link explains how to install from zips:
http://code.google.com/eclipse/docs/install-from-zip.html.
On Tue, Feb 23, 2010 at 11:43 PM, Ashish Mishra
ashish.mishr...@gmail.comwrote:
Hi,
I want to know, how can i install the plugin manually of Google App
Engine. Since on my machine
I have been getting this error since my last deployment. Everything
works fine in my local setup but on the server it throws this
exception.
Caused by: java.io.NotSerializableException:
org.datanucleus.store.appengine.query.DatastoreQuery$2
at
Hi,
This might be useful.
Follow this thread:
http://groups.google.com/group/google-appengine/browse_thread/thread/685d2e9db4063a69
Please confirm.
thanks.
On 2月24日, 午後11:25, Sandeep sandeep.ba...@gmail.com wrote:
I have been getting this error since my last deployment. Everything
works
Hey, guys.
Currently I've got this message during deployment.
java.io.IOException: Error posting to URL:
http://appengine.google.com/api/appversion/create?app_id=caretransferapacversion=1;
500 Internal Server Error
htmlhead
meta http-equiv=content-type content=text/html;charset=utf-8
title500
Same here, haven't been able to deploy my updated app too.
java.io.IOException: Error posting to URL:
http://appengine.google.com/api/appversion/create?app_id=mdvk-chnversion=1;
500 Internal Server Error
htmlhead
meta http-equiv=content-type content=text/html;charset=utf-8
title500 Server
Couldn't derive anything useful from the other thread. I believe the
problem is with something on the server end and not the code.
Something that has been working for the last 4 weeks cannot crash so
abruptly in one screen and continue working on the other. Right now,
it seems like the entire
Are there any good alternatives to Google App Engine out there?
I am finding that I cannot rely on GAE for a production quality
environment.
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Hi,
One of the suggestions I have seen is to keep your home page as a
static HTML and as light as possible. This should enable loading app
within a couple of seconds even if the app is not loaded on any
server. Offcourse, if the kind of service provided through your site
and the user base demands
Nope, but one *imagines* that others (Spring/VMWare, JBoss/RedHat,
Oracle/Sun/Tangasol, Terracotta, Gigaspaces and Intalio/Jetty) are part way
through delivery, or are planning, or finding partners.
There's a huge attraction to the tiny resource requirement to maintain a WAR
file deployment
I think Sun didn't have clear ideas on what was possible and what
clients wanted. They didn't separate their business in hardware and
JavaSoft apart and that bad management decision took its toll.
Microsoft is doing the same mistake: Is it a toy maker or a hardware
maker or an operating system
Hi,
if I wanted to have a product which contains reviews to it, and
Product is a class and Review as well, how would I do that?
I tried
@Persistent(defaultFetchGroup = true)
private LinkedListReview reviews = new LinkedListReview();
in class Product. I would like to get the attached objects
Hey,
Trying to reach:
https://appengine.google.com/
Get an internal server error (500). In addition, can't deploy my app
from eclipse. Following error:
eclipse.buildId=M20090917-0800
java.version=1.6.0_18
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32,
Any valid answers for this question yet?
On Jan 6, 7:33 pm, Jorge athenas...@gmail.com wrote:
It´s been a lot of discussion about this topic lately. See for
instance Tragedy of the Commons, and Cold Starts.
I own dedicated servers with other hosts and what I´ve been doing is
automatically
Why does the code below result in
org.datanucleus.exceptions.NucleusUserException: Object Manager has
been closed? The exception appears to be thrown at
query.getResultList(). I'm using Spring JPA.
bean id=entityManagerFactory
class=org.springframework.orm.jpa.LocalEntityManagerFactoryBean
There are dozens of threads with this topic and the discussions go on
and on. Many ask, many complain, and nobody answers with commitment
(Google).
Some suggest the stupid solution of pinging your app every so often.
No offense, Timofy Koolin, I use the same stupid solution myself!!!
Me too I'm
Has the above mentioned offline precompilatio in 1.3.1 been able to
solve your issue, I plan to use Spring on Java for my Business App
which is complex and could be based on SOA. Kindly let me know if your
issue was resolved or reduced by using the above fix.
On Feb 20, 12:05 am, luijar
If you are trying to put the reult of a query directly into memcache
then you should read
http://groups.google.com/group/google-appengine-java/msg/1d835ac8245d1d48.
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To post to this
I'm trying to make my app robust to survive through these read-only
modes that we seem to be in fairly often lately.
All calls to the cache were surrounded with a try-catch for
MemcacheServiceException as spelled out here (even though I don't use
a StrictErrorHandler, during the last maintenance
On Feb 24, 10:39 am, A1programmer derrick.simp...@gmail.com wrote:
Are there any good alternatives to Google App Engine out there?
I am finding that I cannot rely on GAE for a production quality
environment.
I am very excited about the future of Google App Engine, but I am in
the same boat,
The correct solution is to drive more traffic to your application, and we
discourage pinging. We're working on solutions that will reduce load times
all around. The issue with pinging your application, as some users do, is
that it decreases resources from the global pool and increases the amount
Yes, there was an outage, but this should have been resolved. You may want
to subscribe to this mailing list:
http://groups.google.com/group/google-appengine-downtime-notify
On Wed, Feb 24, 2010 at 9:00 AM, Ronen rbabay...@gmail.com wrote:
Hey,
Trying to reach:
This is likely related to the unscheduled outage earlier today.
See http://code.google.com/status/appengine
Keith
On Wed, Feb 24, 2010 at 11:28 AM, Sandeep sandeep.ba...@gmail.com wrote:
Same here, haven't been able to deploy my updated app too.
java.io.IOException: Error posting to URL:
http://code.google.com/appengine/docs/java/datastore/relationships.html#Owned_One_to_One_Relationships
You create a bidirectional one-to-one relationship using fields on
both classes, with an annotation on the child class's field to declare
that the fields represent a bidirectional relationship.
I think this is actually an interesting question, and brings up a
discussion worth having:
Is datastore performance reasonable?
I don't want to make this a discussion of reliability, which is a
separate issue. It just seems to me that the datastore is actually
kinda pokey, taking seconds to
I'm glad you understand some of the challenges we are facing. We have
several proposed solutions, but each solution has a tradeoff. Sun's
investment in the JVM is massive, and they focused on building a virtual
machine that pays a bit more of an upfront cost for a bigger performance
benefit over
Probably a simple, easy question but...
I am getting this error message when datanucleus enhancement takes
place:
DataNucleus Enhancer completed with an error. Please review the
enhancer log for full details. Some classes may have been enhanced but
some caused errors
DataNucleus Enhancer
Rename your get() method to getXXX or something else. Sadly GAE/J uses
an ancient version of DataNucleus.
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Aah... I see, that worked. get() is a loaded name, I should have known
better.
I am still curious about the location of the log file mentioned in the
error, can you provide some help there?
Thanks!
On Feb 24, 1:48 pm, datanucleus andy_jeffer...@yahoo.com wrote:
Rename your get() method to
I've been trying to devise a way to maintain uniqueness among different
entities by storing some kind of UUID based on the fields I want unique for
that entity Using JDO, and a GenericDAO (groovy)
Here is the method for put() in my GenericDAO:
def put(Object object) {
Collection objects = list();
Ikai,
Maybe you are right. Maybe not. I'm not an expert in datastore
internals, but here is my point of view.
This paper claims that Berkeley DB Java edition can insert about
15,000 records per second.
http://www.oracle.com/database/docs/bdb-je-architecture-whitepaper.pdf
The graphic is on
Simple key-only writes can definitely do it, but there's a few places where
you can introduce overhead:
- serialization
- network I/O
- indexes
My point wasn't necessarily that it wasn't possible. makePersistentAll does
use a batch write, and there are definitely sites that can do 12,000+ writes
On Wed, Feb 24, 2010 at 1:37 AM, vbart vaclav.barta...@spolecne.cz wrote:
I can offer only listing solution, based on our free GQL dynamic
parser - http://audao.spoledge.com/download.jsp
The full JSP you can find here:
Nobody helps :(
NM
El feb 23, 2010 11:08 a.m., nicolas melendez nfmelen...@gmail.com
escribió:
Hi, i have an Unowned relationship beetwen a *Root entity* and a Entity of
an EntityGroup.
*Root entity *isn't part of the* *entity group.
So, to the Entity of an EntityGroup i set the key of my
We need users to be able to access our app on our domain, so I went
into my Dashboard and clicked Add New URL to set this up, and then
added a CNAME at GoDaddy. We use Google Apps for our domain
internally, but do not want the users of our App Engine app accessing
Mail, Documents, Sites, etc.
my experience with a relatively simple application via JDO
makePersistentAll() was that I got
DataStore Operation Timeout exceptions with batch sizes of approx
200-300 objects ...
On Feb 24, 1:48 pm, Guillermo Schwarz guillermo.schw...@gmail.com
wrote:
I think we can safely assume that the
I have to concur with Corby on this ... I was initially attracted to
the end-to-end
solution that GAE offered integrated as it is with Eclipse.
In practice I have found it very frustrating to develop on GAE because
of:
- the class white list and 3rd party framework usage (i.e Spring)
- the
The memcache is a really important feature to increase performance.
However I am not sure how to design my application in regards of how
to use memcache in the best way to cache various kinds of objects.
Often you have the need to cache different types of objects in an
application. It would be
Nope, this is cheap. Do it as many times as you need. You're not
instantiating a Memcache instance. You're instantiating a client instance.
On Wed, Feb 24, 2010 at 3:24 PM, Mouseclicker jens.h...@googlemail.comwrote:
The memcache is a really important feature to increase performance.
However I
It depends on your app. For small business app, you may check out force.com,
which offers free developer account. I use both GAE and force.com because
I'm excited about connecting google cloud with salesforce cloud. but, GAE's
current state of reliability and performance is a bit concern. Hope GAE
Ok muchas gracias por sus respuestas, efectivamente habia 2 versiones
de fileupload y common-io en el path build\web\WEB-INF\lib, esto es
extraño porque edite las librerias de struts de mi proyecto y quite
las mas antiguas, sin embargo Netbeans quitaba las referencias pero
los archivos seguian en
Hi Jake,
thanks a lot for your answer.
After changing the mappedBy statement to child like this:
@Persistent(mappedBy = mOfferDetails)
private Offer mOffer;
and removing mappedBy from parent, Offer object seems to be persisted.
But when I get this object from the database with:
You should be able to connect this:
?xml version=1.0 encoding=utf-8?
web-app
!-- Add this to your web.xml to enable remote API on Java. --
servlet
servlet-nameremoteapi/servlet-name
servlet-classcom.google.apphosting.utils.remoteapi.RemoteApiServlet/servlet-class
/servlet
I'm not certain there's a big benefit either way, as you still have to
remove all the indexes related to the entities. What have your benchmarks
reported?
On Wed, Feb 17, 2010 at 12:06 PM, Shai levys...@gmail.com wrote:
Hi
When I delete entities by query am I limited to 500 entities like when
Were you able to resolve this? What's your app-id?
On Wed, Feb 17, 2010 at 2:18 PM, Shai levys...@gmail.com wrote:
HI,
I encountered something strange when running queries in my application
so I went to the Datastore Viewer and reproduced it in there, maybe
someone can help me out:
I have
I've seen this issue with certain deploys where we may not report the
correct error message, but I'm assuming you wrote a simple application that
wouldn't have had any of those issues. This likely coincided with a
maintenance period. You should be able to deploy. If you can't, please let
us know
Er, excuse me, the app-id is in the original email. In any case, please let
us know if this has worked for you.
On Wed, Feb 24, 2010 at 5:02 PM, Ikai L (Google) ika...@google.com wrote:
I've seen this issue with certain deploys where we may not report the
correct error message, but I'm
What's your application ID?
On Fri, Feb 19, 2010 at 12:05 AM, Alberty Pascal
alberty.pas...@gmail.comwrote:
Hi all,
while updating my application, I got the following stack for all
request made on it.
I try to deploy a really simple new application (created with Eclipse
and its plugin) and
You should fill out the following form:
http://code.google.com/support/bin/request.py?contact_type=AppEngineBillingSupport
On Fri, Feb 19, 2010 at 4:53 AM, Sandeep sandeep.ba...@gmail.com wrote:
Hi,
I wanted to know what is the procedure/notifications that need to be
followed to communicate
You might want to ask on the Scala groups because I don't see a lot of Scala
questions asked on this group.
That being said, I've fiddled with Scala on App Engine before with some
success. A few tips from what I've learned:
- You don't need to create a Key. JDO will acquire a unique key for you.
Can you post code and a stack trace? If you have a JUnit test case that'd be
helpful as well.
On Wed, Feb 24, 2010 at 2:30 PM, nicolas melendez nfmelen...@gmail.comwrote:
Nobody helps :(
NM
El feb 23, 2010 11:08 a.m., nicolas melendez nfmelen...@gmail.com
escribió:
Hi, i have an Unowned
Probably OAuth, though I'm not sure how that will work with a gadget. In
most places gadgets will include a user ID with the makeRequest.
On Tue, Feb 23, 2010 at 12:23 PM, Thomas Schnocklake
thomas.schnockl...@googlemail.com wrote:
Thank you for your answer.
So what would you suppose to use
Ok i will do one. Thanks. Nm
El feb 24, 2010 10:32 p.m., Ikai L (Google) ika...@google.com escribió:
Can you post code and a stack trace? If you have a JUnit test case that'd be
helpful as well.
On Wed, Feb 24, 2010 at 2:30 PM, nicolas melendez nfmelen...@gmail.com
wrote:
Nobody helps :(
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