date:20101026

Hello,
to compare Users the only safe field is the unique User ID that is
exposed via getUserId() method.

http://code.google.com/appengine/docs/java/users/overview.html#Accessing_Account_Information

Also getFederatedIdentity()  could be a good bet, but documentation
recommends using the identifier.
I only use the email field after the user has been logged in, and
restricting to Google as a provider. This should be safe enough.
I think the only way to group accounts is to use IDs and set up an
external verification like SMS or email confirmation.

Regards
Lorenzo


On Oct 24, 10:04 pm, trustamli mc2...@gmail.com wrote:
 Hi,

 For some reason my application handles OpenID accounts with same
 emails as one user. It means when I try to
 access datastore entities with User field of new user it also gets
 entities of all other users with the same email.

 Is User object same as email? Pythod documentation says: User
 instances are unique and comparable. If two instances are equal, then
 they represent the same user. (but I use Java).

 I think I'm doing something wrong here:

  Query query = pm.newQuery(Subscriber.class, user == userParam);
  query.declareImports(import com.google.appengine.api.users.User);
  query.declareParameters(User userParam);

 �...@suppresswarnings(unchecked)
  ListSubscriber results = (ListSubscriber) query.execute(user);
  if (results.size()!=0)
     Logger.log(User logged in, results.iterator().next().getId());

 ?

 With this problem using OpenID is very unsafe. Anybody can create an
 OpenID account with any email (for example with myOpenID), without
 email verification, and then log in to my application and get data
 related to all Users with this email.

 I believe I'm doing something wrong, so I'll really hope someone will
 open my eyes.

 Thanks,
 Best Regards.

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[appengine-java] Re: java.net.InetAddress present in new 1.3.8 SDK but not on live servers

may i know in gae, how to you set parameter for   new
LookupService(String databaseFile)  ? do you use blockstore ? what is
the path do you upload the  maxmind dat file?

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[appengine-java] Re: java.net.InetAddress present in new 1.3.8 SDK but not on live servers

may i know in gae, how to you set parameter for   new
LookupService(String databaseFile)  ? do you use blockstore ? what is
the path do you upload the  maxmind dat file?

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[appengine-java] Re: java.net.InetAddress present in new 1.3.8 SDK but not on live servers

may i know in gae, how to you set parameter for   new
LookupService(String databaseFile)  ? do you use blockstore ? what is
the path do you upload the  maxmind dat file?

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[appengine-java] JSF 2.0 MyFaces problem with Ajax and Command Button

2010-10-26 Thread powell...@gmail.com

I cannot get Ajax to allow navigation to another page when a
h:commandButton is clicked. I use the classic command given in texts
as shown below but Ajax will always display the current page. In the
example below, I want to transition to the page2.xhtml page when I
click but I only get the current page redisplayed. I tried giving ajax
attributes of execute=@form and even render=@form without success.
Is this a known bug.

h:form prependId=false
...
h:commandButton id=button1 action=page2 
   f:ajax /
/h:commandButton
/h:form

Dave

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[appengine-java] Memory based application, static field, data lost

2010-10-26 Thread yoyo

Hello everyone.


I've a issue when using my apps.
All my logics application data are in memory.


For exemple, I've a servlet like this :


public class MyServlet {


/** Logic application object, create when the class is loaded by the
sandbox. */
private static Logics myLogic = new Logics();


/** Handle post request */
protected void doPost( [...]) {
myLogic.doStuff([...]);
}
}




The doPost method don't take 30 seconds to be execute.




My issue is this : Few minutes after my servlet is loaded and works,
I've got a new instance of Logics.
I thing AppEngine reload my class.


I haven't read about this kind of comportment. Maybe I haven't read the
docs enough.


Must I use appengine api, like memcache ?


Thanks for reading this newbie appengine developer message.


Have a nice day.

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[appengine-java] Sharing a PersistenceManagerFactory instance between web application instances

2010-10-26 Thread Ian Marshall

As we all know, the construction of a PersistenceManagerFactory (PMF)
instance that is needed for exchanging data with the datastore is
slow.

To speed up the showing of my home page (which does not need data from
the datastore), my application creates a queued task at launch-time,
which constructs its singleton PMF instance asynchronously. This way,
the creation of my PMF does not add to spin-up (and other?) delays to
app start-up.

Can a PMF instance be shared between application instances?

If so, I could hasten app initialisation by getting an already-
existing PMF instance from the memory cache and only construct one if
it is no longer in the memory cache.

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[appengine-java] Get number of children from multiple objects

2010-10-26 Thread b...@dutchtape.com

I'm using the datastore of the Google App Engine (DataNucleus). I have
two classes, one Chat and one Rating. A chat can be rated more then
ones so I created an one-many relationship by adding a list to the Chat
class.

Now I want to know the number of unrated chats, so I did the following:


int numberOfChatsInStock = 0;
for(Chat chat : chats){
if(chat.getRatings().size() == 0){
numberOfChatsInStock++;
}
}

This simply iterate through all chats and checks if the number of
ratings is 0.

This solution works well when there are 10 chats, but when I have 500+
chats then the speed is terrible (15 sec +).

I thought maybe the size() method is faster. So I tried
Query.setFilter(ratings.size() == 0) but this gives me the following
error:
Unsupported method size while parsing expression:
InvokeExpression{[PrimaryExpression{ratings}].size(none)}

Is there any way to increase the speed?

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[appengine-java] Re: Memory based application, static field, data lost

2010-10-26 Thread Ian Marshall

The GAE datastore is a form of persistent data storage, in that data
stored there will survive the discarding of instances of your
application (GAE will discard instances in cases of low usage).

Data stored in the memory cache can survive the discarding of
instances of your application, but there is no guarantee; data in the
memory cache may be discarded by GAE at any time.

My (Apache Wicket) web sessions are stored by GAE in both the memory
cache (for speed of access) and the datastore (for guarantee of
access) automatically. If you do not have much data, you could store
your data in a web session - but of course this data will have session
scope only - not application instance or all-application-instances
scope.

Since I want to store persistent data, I use the datastore. One could
be clever by using queued tasks to do this somehow, but I cannot be
bothered with the resultant complexity.


On Oct 26, 11:22 am, yoyo yoyomo...@gmail.com wrote:
 Hello everyone.

 I've a issue when using my apps.
 All my logics application data are in memory.

 For exemple, I've a servlet like this :

 public class MyServlet {

 /** Logic application object, create when the class is loaded by the
 sandbox. */
 private static Logics myLogic = new Logics();

 /** Handle post request */
 protected void doPost( [...]) {
 myLogic.doStuff([...]);

 }
 }

 The doPost method don't take 30 seconds to be execute.

 My issue is this : Few minutes after my servlet is loaded and works,
 I've got a new instance of Logics.
 I thing AppEngine reload my class.

 I haven't read about this kind of comportment. Maybe I haven't read the
 docs enough.

 Must I use appengine api, like memcache ?

 Thanks for reading this newbie appengine developer message.

 Have a nice day.

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[appengine-java] Low-level API: EntityTranslator and DataTypeTranslator

2010-10-26 Thread dominity

Hi, guys.

Is there any information of how could I use these classes in my code?

Best regards, Alexander.

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Re: [appengine-java] Low-level API: EntityTranslator and DataTypeTranslator

2010-10-26 Thread John Patterson

These are unpublished classes so you should use them at your own
risk. They may change in a future release in which case you will get
NoSuchMethodError exceptions thrown.

You can see how Twig uses them in AyncDatastoreHelper to implement
async datastore commands. Twigs implementation protects against
changes to these classes by capturing errors and retrying the normal
synchronous commands instead. So if there are any problems due to
server side upgrades Twig drops back to normal speed operations that
are run serially rather than in parallel.

John

On 26 Oct 2010, at 18:02, dominity wrote:

Hi, guys.

Is there any information of how could I use these classes in my code?

Best regards, Alexander.

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[appengine-java] Re: Memory based application, static field, data lost

2010-10-26 Thread yoyo

Thanks for your answear.


So, GOE discard instances in cases of low usage. I didn't know.


My app is an image board, like 4chan.org.


The blowstore api in only available for billing account.
I can't use the blowstore because my app isn't commercial. I write it
only for fun and i don't want to pay for it.


I'll use the memcache service. It's not important if some of pictures
are lost. There is no guarantee, but I hope keep most of pictures into
it.
Else... well I'll see.


I've some refactoring to do. Thanks again for your answear.

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[appengine-java] Re: SDK/Eclipse pains on Ubuntu

2010-10-26 Thread John

In the above post not the implementations should read not the
interfaces.  Aw snap! as Chrome says.

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[appengine-java] Java while statement bug on GAE server?

2010-10-26 Thread doc123

Now I am using GDataI for Java and I tried following code to get Google
document list




DocumentListFeed tempFeed;

tempFeed = myService.getFeed(feedUrl, DocumentListFeed.class);



After I confirmed this code work without problem, I change code as
following to be able to feed more than one page entry, but this code
create Null pointer Exception.



DocumentListFeed tempFeed;

tempFeed = myService.getFeed(feedUrl, DocumentListFeed.class);

resultFeed.getEntries().addAll(tempFeed.getEntries());




while((tempFeed.getNextLink() != null) 
(tempFeed.getEntries().size()0));

{

tempFeed = myService.getFeed(new
URL(tempFeed.getNextLink().getHref()),DocumentListFeed.class);

resultFeed.getEntries().addAll(tempFeed.getEntries());

}



I confirmed that “tempFeed.getNextLink()” is null. But this is a
condition to repeat while. I could not understand why this code fail
and I found suspicious info which related to Java while statement bug
in a following URL. Is this real bug?


http://java.decompiler.free.fr/?q=node/263 after I get info, I changed
my code as following and confirmed this code works without error.



DocumentListFeed tempFeed = this.resultDocListFeed;

DocumentListFeed resultFeed = new DocumentListFeed();

boolean okToFeed = true;



do

{

if(tempFeed != null  tempFeed.getEntries() != null)

{

if(tempFeed.getNextLink() != null  tempFeed.getEntries().size()0)

{

tempFeed = this.docServiceClient.getFeed(new
URL(tempFeed.getNextLink().getHref()),DocumentListFeed.class);

resultFeed.getEntries().addAll(tempFeed.getEntries());

}

else

{

okToFeed = false;

}

}

else

{

okToFeed = false;

}

}while(okToFeed == true);

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[appengine-java] Re: memcache package not in classpath

2010-10-26 Thread Max

Thanks a lot for sharing this!

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[appengine-java] Task Queue on other App Servers

2010-10-26 Thread andrew

Anyone out there got an implementation of the TaskQueue working on
other app servers (jetty, tomcat)?

We would like this as an option to ensure portability of our
application between app engine and other options.

Either the same Google TaskQueue code configured to run on another
server, or a compatible implementation.

If not, anyone else looking for the same - who is interested in
sharing the effort of getting that running?

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[appengine-java] Re: Java while statement bug on GAE server?

Don't know APIs very well, but anyway it looks like in the while
version you check one link in the condition, then request newLink
again in the method body. At the end of the list you check for the
last element not to be null, then ask for one more (which is out of
list bounds).
You should be missing one page each two anyway...

I guess the do-while version catches this with the tempFeed != null
 tempFeed.getEntries() != null check.

Regards
Lorenzo

On Oct 26, 2:16 pm, doc123 doc.u...@gmail.com wrote:
 Now I am using GDataI for Java and I tried following code to get Google
 document list

 DocumentListFeed tempFeed;

 tempFeed = myService.getFeed(feedUrl, DocumentListFeed.class);

 After I confirmed this code work without problem, I change code as
 following to be able to feed more than one page entry, but this code
 create Null pointer Exception.

 DocumentListFeed tempFeed;

 tempFeed = myService.getFeed(feedUrl, DocumentListFeed.class);

 resultFeed.getEntries().addAll(tempFeed.getEntries());

 while((tempFeed.getNextLink() != null) 
 (tempFeed.getEntries().size()0));

 {

 tempFeed = myService.getFeed(new
 URL(tempFeed.getNextLink().getHref()),DocumentListFeed.class);

 resultFeed.getEntries().addAll(tempFeed.getEntries());

 }

 I confirmed that “tempFeed.getNextLink()” is null. But this is a
 condition to repeat while. I could not understand why this code fail
 and I found suspicious info which related to Java while statement bug
 in a following URL. Is this real bug?

 http://java.decompiler.free.fr/?q=node/263after I get info, I changed
 my code as following and confirmed this code works without error.

 DocumentListFeed tempFeed = this.resultDocListFeed;

 DocumentListFeed resultFeed = new DocumentListFeed();

 boolean okToFeed = true;

 do

 {

 if(tempFeed != null  tempFeed.getEntries() != null)

 {

 if(tempFeed.getNextLink() != null  tempFeed.getEntries().size()0)

 {

 tempFeed = this.docServiceClient.getFeed(new
 URL(tempFeed.getNextLink().getHref()),DocumentListFeed.class);

 resultFeed.getEntries().addAll(tempFeed.getEntries());

 }

 else

 {

 okToFeed = false;

 }
 }

 else

 {

 okToFeed = false;

 }
 }while(okToFeed == true);

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[appengine-java] Re: Java while statement bug on GAE server?

2010-10-26 Thread doc123

Sorry to use specific sample code. So I tried more basic following code.



try

{

int i =0;

boolean tempFlag = false;




while(tempFlag == true);

{

i++;

out.println(tempFlag + i + := + tempFlag);

tempFlag = false;

}

}

catch(Exception e)

{

out.println(Error + e.toString());

}





what I got is tempFlag1:=false but out.print is within a
while(tempFlag == true) bock.


I think this is bug.

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[appengine-java] Re: Java while statement bug on GAE server?

Really looks like a bug. Test condition should fail without printing
anything, in fact.
Sorry for my misleading answer, and thanks for sharing this.

Lorenzo

On Oct 26, 5:22 pm, doc123 doc.u...@gmail.com wrote:
 Sorry to use specific sample code. So I tried more basic following code.

 try

 {

 int i =0;

 boolean tempFlag = false;

 while(tempFlag == true);

 {

 i++;

 out.println(tempFlag + i + := + tempFlag);

 tempFlag = false;

 }
 }

 catch(Exception e)

 {

 out.println(Error + e.toString());

 }

 what I got is tempFlag1:=false but out.print is within a
 while(tempFlag == true) bock.

 I think this is bug.

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Re: [appengine-java] Re: Java while statement bug on GAE server?

2010-10-26 Thread Don Schwarz

Yes, it's a bug in your code:

 while(tempFlag == true);

Note the semicolon.  Try removing it.

On Tue, Oct 26, 2010 at 10:22 AM, doc123 doc.u...@gmail.com wrote:
 Sorry to use specific sample code.  So I tried more basic following code.

 try
 {

 int i =0;

 boolean tempFlag = false;

 while(tempFlag == true);

 {

 i++;

 out.println(tempFlag + i + := + tempFlag);

 tempFlag = false;

 }

 }
 catch(Exception e)
 {

 out.println(Error + e.toString());

 }

 what I got is  tempFlag1:=false  but out.print is within a while(tempFlag
 == true) bock.
 I think this is bug.



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[appengine-java] Re: Java while statement bug on GAE server?

I need a good pair of glasses :-)

On Oct 26, 5:42 pm, Don Schwarz schwa...@google.com wrote:
 Yes, it's a bug in your code:

  while(tempFlag == true);

 Note the semicolon.  Try removing it.

 On Tue, Oct 26, 2010 at 10:22 AM, doc123 doc.u...@gmail.com wrote:
  Sorry to use specific sample code.  So I tried more basic following code.

  try
  {

  int i =0;

  boolean tempFlag = false;

  while(tempFlag == true);

  {

  i++;

  out.println(tempFlag + i + := + tempFlag);

  tempFlag = false;

  }

  }
  catch(Exception e)
  {

  out.println(Error + e.toString());

  }

  what I got is  tempFlag1:=false  but out.print is within a while(tempFlag
  == true) bock.
  I think this is bug.

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[appengine-java] Re: Memory based application, static field, data lost

2010-10-26 Thread nischalshetty

GAE runs multiple instances which means your code would be run on
multiple JVMs as well which means the static field will be multiple as
well. A lot of as wells here but I hope you get the point.

Use statics for constants that do not change. For everything else
persist either in memcache or datastore.

-N

On Oct 26, 4:17 pm, yoyo yoyomo...@gmail.com wrote:
 Thanks for your answear.

 So, GOE discard instances in cases of low usage. I didn't know.

 My app is an image board, like 4chan.org.

 The blowstore api in only available for billing account.
 I can't use the blowstore because my app isn't commercial. I write it
 only for fun and i don't want to pay for it.

 I'll use the memcache service. It's not important if some of pictures
 are lost. There is no guarantee, but I hope keep most of pictures into
 it.
 Else... well I'll see.

 I've some refactoring to do. Thanks again for your answear.

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[appengine-java] index stuck in Building status

2010-10-26 Thread gabriel munteanu

Hi, i have appid ringojsblog, and there are 2 indexes with status
Building for over half an hour.
i have ~ 20 entities, that is all.

Thank you in advance

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[appengine-java] Eclipse plugin insists on copying DataNucleus jars to war/WEB-INF/lib

2010-10-26 Thread Maxim Veksler

Hello,

My project needs only 2 jars from GAE/J:
appengine-api-1.0-sdk-1.3.8.jar
appengine-api-labs-1.3.8.jar

The rest of the jars supplied by the plugin are API's that are not used by
our application and thus not required as part of the deployment:
appengine-jsr107cache-1.3.8.jar
datanucleus-appengine-1.0.7.final.jar
datanucleus-core-1.1.5.jar
datanucleus-jpa-1.1.5.jar
geronimo-jpa_3.0_spec-1.1.1.jar
geronimo-jta_1.1_spec-1.1.1.jar
jdo2-api-2.3-eb.jar
jsr107cache-1.1.jar


I've tried to delete these jars and deployed the app to GAE/J -- It works
great and the application is running happily ever after.

The thing is GAE Eclipse plugin insists on recopying the jars to the project
war/WEB-INF/lib folder (* it's unclear the when it decides to do so).
I even tried to edit the values of filesCopiedToWebInfLib from the settings
file .settings/com.google.appengine.eclipse.core.prefs which also did not
help (further more -- The plugin just updated this entry back to it's
original state... why put a configuration option if you ignore it?)

I want these jars removed for 2 reasons:
- 1. It makes the project lighter, removes clutter and is generally better
to pull small project over wire.
- 2. I remember reading in the mailing list that fewer jars help improve the
application cold start times. I'm not talking about projects like spring
that have large startup penalty but simply having jar flles in the
classpath. Don't know if this is true and I haven't done any benchmarks to
verify this. OTOH to be on the safe side -- Why test if I can simply not
upload the unwanted jars and be done with it?

So, in conclusion - What is the proper method (if any) to instruct GAE
Eclipse Plugin to skip checking and copying of jar's that are basic GAE sdk
jars into my WEB-LIB/lib folder?


Thanks for reading,
Maxim.

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[appengine-java] Cheapest way to run an SQL EXISTS query with Datastore API?

2010-10-26 Thread Dan Dubois

What is the absolute cheapest way (CPU cost) theoretically to run an
SQL EXISTS query with the Datastore API?

I imagine FetchOptions would be
FetchOptions.Builder.withChunkSize(1).limit(1).prefetchSize(1) and
probably option 1 below.

Query query = new Query(KIND);
//add filters and sorts here, if querying by key use
query.setKeysOnly()
DatastoreService datastoreService =
DatastoreServiceFactory.getDatastoreService();
PreparedQuery pq = datastoreService.prepare(query);

//Option 1
long count =
pq.countEntities(FetchOptions.Builder.withChunkSize(1).limit(1).prefetchSize(1));

if (count == 0) {
//does not exist
}
else {
//exists
}

// or maybe
//Option 2
if (pq.asIterator().hasNext()) {
//exists
}
else {
//does not exist
}

Is there anything cheaper?

Best wishes,
Dan

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[appengine-java] Re: index stuck in Building status

2010-10-26 Thread gabriel munteanu

after more digging, i guess it was due to changing versions in the
admin interface while indexes were building up.
after a new deploy on the same version, it was all ok in 1 minute.

On Tue, Oct 26, 2010 at 7:18 PM, gabriel munteanu jajali...@gmail.com wrote:
 Hi, i have appid ringojsblog, and there are 2 indexes with status
 Building for over half an hour.
 i have ~ 20 entities, that is all.

 Thank you in advance




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[appengine-java] upload_data to dev server failing --- Cookie name Path is a reserved token

2010-10-26 Thread Brian Hill

I have successfully used appcfg.py upload_data to get lots of data onto
my app at appspot.google.com.


Now, I'd like to have the same, complete dataset on my development
server. However, each attempt of appcfg.py to hit the development
server is failing. A clue is that it is generating a server log:

[WARN] java.lang.IllegalArgumentException: Cookie name Path is a
reserved token



Here is the full command:



appcfg.py --config_file=configuration.kind2.yaml
--application=myappid --url=http://localhost:/_ah/remote_api
--no_cookies --filename=datafilename --kind=data kind
--log_file=tmp/bulkloader.log --db_filename=tmp/bulkloader.sql3
upload_data


I'm on the latest and greatest of just about everything and am stumped
now. Versions are below. Ideas are welcome.


Again, the same script --- except for authentication differences ---
has worked over and over again on appspot. ~Brian


Dev server launched by Google App Engine Java SDK 1.3.8 Plugin
Plug-in is running under Eclipse 3.6 Helios SR1.
Yesterday (10/24/2010) I accepted a Java update from Apple, to 13.3.0.
OS is Mac OS X 10.6.4.

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[appengine-java] key.id - works for me, but is it the right way to go?

2010-10-26 Thread Richard Berger

Building a test application just to learn about GAE/J and things are
working fine (so far), but I am wondering if I am veering off in a
wrong direction.  Here is a simplified statement of the situation...

1. I have an entity class for an entity A
public class A implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Key key;

2. In a JSP page, I display a list of As, with a link to show the full
details of an A.  This link is generated by the JSTL:
a href=/show?aKey=c:out value=${a.key.id} /c:out value=$
{a.key.id} //a/td

3. In the show servlet, I have:
  Long requestKey = Long.parseLong(req.getParameter(aKey));
  Key aKey= KeyFactory.createKey(A, requestKey);
  A a = em.find(A.class, aKey);

As mentioned, it all works fine.  I have used this for both entities
with no parents (as above) and entities owned by a parent.  It just
seems odd to me that I am using something like ${a.key.id} rather than
${a.key}, but ${a.key} gives me the key.toString() value rather than
the KeyFactory.keyToString(key) value.  Also, since I am using JSTL, I
don't know how to use KeyFactory (without using a JSP scriptlet, which
I try (for no particular reason) to avoid.

Is the above ok/safe/fine - or am I abusing GAE and generating major
negative GAE karma which will come back to bite me in the future?  :)

Thanks!
RB

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Re: [appengine-java] Re: Channel API still not live...

Very slim. We want to ship it as soon as possible.

In the meantime, there are plenty of services that offer this type of
functionality:

http://beaconpush.com
http://pubnub.com

... and so forth

Don't let this feature block you if your application needs it. Build it
using another tool and port it over when we are ready to release the Channel
API for everyone.

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On Tue, Oct 26, 2010 at 12:41 AM, stole goran.stoj...@gmail.com wrote:

Thanks everybody for the info. I just needed to see what are the
chances for getting the API activated soon (this week). From Your
answers I'd say very slim.

On Oct 26, 8:16 am, Heiko Roth r...@egotec.com wrote:
No activation yet.
I'm waiting, too.

Right now, we pull status every 5 minutes, but that's not the best
way.
Other APIs like Pushlet don't work on appengine.

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[appengine-java] Re: 1.3.8 Console Logging Issue

2010-10-26 Thread Dan Dubois

I am getting the same problem but still on GWT 2.0.3. It must be an
app engine java dev server problem.

On Oct 25, 6:04 am, vvorski vic...@vorski.com wrote:
 Same here with python on a Mac. Have heard reports of same with Java
 on windows. Seems to be a global1.3.8problem?

 V/.

 On Oct 24, 9:04 pm, jt john.j.tho...@gmail.com wrote:







  Hello,

  I upgraded my project from 1.3.4 to1.3.8. After the upgrade, the
  console fails to log. If I switch back to 1.3.4, the console logs
  properly.

  I am on a 64-bit Windows Vista environment, running Eclipse 3.4.2 w/
  (MyEclipse and Instantiations GWT tools)

  Thanks

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Re: [appengine-java] recommendation on using maxmind geoip

MaxMind IP was what I used for this example:

http://ikaisays.com/2010/08/11/using-the-app-engine-mapper-for-bulk-data-import/

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On Mon, Oct 25, 2010 at 9:02 PM, asianCoolz second.co...@gmail.com wrote:

 may i know what is the preferable way of using maxmind geoip? upload
 the 'binary file' or bulk upload the csv files into bigtable?  the
 prior technique will slow down application startup time?

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Re: [appengine-java] Sharing a PersistenceManagerFactory instance between web application instances

No, you can't share a PMF instance between app instances. Constructing this
is slow because it has to do classpath scanning. Note that if you use the
low-level API, application startup time is greatly reduced:

http://code.google.com/appengine/docs/java/javadoc/com/google/appengine/api/datastore/package-summary.html

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On Tue, Oct 26, 2010 at 3:32 AM, Ian Marshall ianmarshall...@gmail.comwrote:

As we all know, the construction of a PersistenceManagerFactory (PMF)
instance that is needed for exchanging data with the datastore is
slow.

To speed up the showing of my home page (which does not need data from
the datastore), my application creates a queued task at launch-time,
which constructs its singleton PMF instance asynchronously. This way,
the creation of my PMF does not add to spin-up (and other?) delays to
app start-up.

Can a PMF instance be shared between application instances?

If so, I could hasten app initialisation by getting an already-
existing PMF instance from the memory cache and only construct one if
it is no longer in the memory cache.

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Re: [appengine-java] Cheapest way to run an SQL EXISTS query with Datastore API?

The cheapest way is to use the value you are checking for as a datastore
key, then to do a get by key. A query always results in an index operation
followed by a fetch by key, so you are reducing the need for an index
lookup.

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On Tue, Oct 26, 2010 at 10:02 AM, Dan Dubois uvico...@gmail.com wrote:

 What is the absolute cheapest way (CPU cost) theoretically to run an
 SQL EXISTS query with the Datastore API?

 I imagine FetchOptions would be
 FetchOptions.Builder.withChunkSize(1).limit(1).prefetchSize(1) and
 probably option 1 below.

Query query = new Query(KIND);
//add filters and sorts here, if querying by key use
 query.setKeysOnly()
DatastoreService datastoreService =
 DatastoreServiceFactory.getDatastoreService();
PreparedQuery pq = datastoreService.prepare(query);

//Option 1
long count =

 pq.countEntities(FetchOptions.Builder.withChunkSize(1).limit(1).prefetchSize(1));

if (count == 0) {
//does not exist
}
else {
//exists
}

// or maybe
//Option 2
if (pq.asIterator().hasNext()) {
//exists
}
else {
//does not exist
}

 Is there anything cheaper?

 Best wishes,
 Dan

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[appengine-java] Re: SDK/Eclipse pains on Ubuntu

2010-10-26 Thread Ed Murphy

If you right-click your appengine project and choose properties from
the contextual menu (or just select the project and select properties
item in the Project menu on the menubar), you get the project
properties. Select the Google in the navbar on the left, then select
App Engine from the tree undeneath it. This shows the App Engine
control panel. It has radio buttons for choosing the version of the SDK
that you want to use. Next to the radio button Use default SDK there
is a configure SDKs link. Select that link, then choose an older SDK
as you default checking it.. Select OK to keep this selection and go
back to the App Engine control panel. Now make sure the Use default
SDK radio button is selected. Then select the OK button to close the
control panel. This _may_ cause the old jars to get copied. If it does,
you will see a progress window popup and then go away. Now re-open the
App Engine control panel. This time, choose the radio button Use
specific SDK and choose the most recent SDK in the pull down that is
just to the right. Select the OK button to close the control panel.
This time you _should_ see the progress window as the IDE copies the
latest SDK jars into your project.


Again, you are basically trying to get the plugin to detect that the
SDK version has changed. If it properly detects this, it will
automatically copy the jars into your project (and you will know this
is happening because it puts up the progress window).



Ed

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[appengine-java] Class not found in Eclipse

2010-10-26 Thread tleroy

Hello everybody,

I use the appengine eclipse plugin,  I have created a 'Web Application
Project' and a 'Simple Java Project' linked to it. When I launch the
Web Application Project, classes from the Simple project are not
found. Where I have to configure the classpath? I tried in the
'.lauch' file but it doesn't work.

Could you help me?

Merci.

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Re: [appengine-java] Re: Please anyone from google on this

2010-10-26 Thread Katharina Probst

Hi Gal,

I've looked into this and it appears that your page is indeed getting
indexed properly -- so from Googlebot's perspective, all is good (although
we are looking at modifying Fetch as Googlebot to give you the proper answer
in the future).

Hope this helps!
kathrin

On Fri, Oct 22, 2010 at 11:19 PM, Katharina Probst kpro...@google.comwrote:

Hi Gal,

sorry for the delayed response! At first glance, it looks like you're doing
it right -- I will have to dig a little.

kathrin

On Fri, Oct 22, 2010 at 7:24 PM, Gal Dolber gal.dol...@gmail.com wrote:

Please? Any information on this is appreciated

On Wed, Oct 20, 2010 at 1:56 PM, Gal Dolber gal.dol...@gmail.com wrote:

http://www.google.com/support/forum/p/Web+Search/thread?tid=47496ffe5ea01d39hl=en

I notice that it works ok on gwt's showcase.
Thanks

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[appengine-java] JPA null pointerException at org.datanucleus.store.appengine.EntityUtils.getPkAsKey()

2010-10-26 Thread ferda8

Hi all,


I am new to Google App Engine. I am developing application with GAE and
i am using JPA to access datastore. When I create entity and try to
save into datastore, I get this exception:


java.lang.NullPointerException at
org.datanucleus.store.appengine.EntityUtils.getPkAsKey(EntityUtils.java:152)
at
org.datanucleus.store.appengine.DatastoreFieldManager.getKeyForObject(DatastoreFieldManager.java:625)
at
org.datanucleus.store.appengine.DatastoreFieldManager.getParentKeyFromParentField(DatastoreFieldManager.java:634)
at
org.datanucleus.store.appengine.DatastoreFieldManager.establishEntityGroup(DatastoreFieldManager.java:591)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.insertPreProcess(DatastorePersistenceHandler.java:343)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObjects(DatastorePersistenceHandler.java:251)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObject(DatastorePersistenceHandler.java:240)
at
org.datanucleus.state.JDOStateManagerImpl.internalMakePersistent(JDOStateManagerImpl.java:3185)
at
org.datanucleus.state.JDOStateManagerImpl.flush(JDOStateManagerImpl.java:4513)
at
org.datanucleus.ObjectManagerImpl.flushInternal(ObjectManagerImpl.java:2814)
at org.datanucleus.ObjectManagerImpl.flush(ObjectManagerImpl.java:2754)
at
org.datanucleus.ObjectManagerImpl.preCommit(ObjectManagerImpl.java:2893)
at
org.datanucleus.TransactionImpl.internalPreCommit(TransactionImpl.java:369)
at org.datanucleus.TransactionImpl.commit(TransactionImpl.java:256) at
org.datanucleus.jpa.EntityTransactionImpl.commit(EntityTransactionImpl.java:104)
at
org.datanucleus.store.appengine.jpa.DatastoreEntityTransactionImpl.commit(DatastoreEntityTransactionImpl.java:55)
at
org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:467)
at
org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:754)
at
org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:723)
at
org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:394)
at
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:117)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at $Proxy26.createNewUser(Unknown Source) at
cz.cvut.bakalarka.writerbook.controllers.RegistrationController.registrate(RegistrationController.java:55)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597) at
com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:100)
at
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.doInvokeMethod(HandlerMethodInvoker.java:710)
at
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:167)
at
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:414)
at
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:402)
at
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:771)
at
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:716)
at
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:647)
at
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:563)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:713) at
javax.servlet.http.HttpServlet.service(HttpServlet.java:806) at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at
org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:113)
at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:344)
at
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:110)
at
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
at

Re: [appengine-java] Re: Please anyone from google on this

2010-10-26 Thread Gal Dolber

Thank you!
Regards

On Tue, Oct 26, 2010 at 5:51 PM, Katharina Probst kpro...@google.comwrote:

Hi Gal,

Hope this helps!
kathrin

On Fri, Oct 22, 2010 at 11:19 PM, Katharina Probst kpro...@google.comwrote:

Hi Gal,

sorry for the delayed response! At first glance, it looks like you're
doing it right -- I will have to dig a little.

kathrin

On Fri, Oct 22, 2010 at 7:24 PM, Gal Dolber gal.dol...@gmail.com wrote:

Please? Any information on this is appreciated

On Wed, Oct 20, 2010 at 1:56 PM, Gal Dolber gal.dol...@gmail.comwrote:

http://www.google.com/support/forum/p/Web+Search/thread?tid=47496ffe5ea01d39hl=en

I notice that it works ok on gwt's showcase.
Thanks

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[appengine-java] Handle internal 500 error gracefully

2010-10-26 Thread Peter Liu

In doc for java:

Note: At present, you cannot configure custom error handlers for some
error conditions. Specifically, you cannot customize the 404 response
page when no servlet mapping is defined for a URL, the 403 quota error
page, or the 500 server error page that appears after an App Engine
internal error.

I vaguely remember a few patches ago, there's a way to specify error
page for the 500 internal error? Is it true? If so how to setup the
pages?

I am starting to see this 500 error more consistently in certain
sequence of event (but the log never shows the 500, I suppose this
happens before hitting the JVM).

Sequence of event:
1. HTTP post that triggers an immediate Task Queue task
2. The Task Queue job is immediately called but timing out (it calls
some external URL and can block)
3. The HTTP call in step 1 returns successfully and the client
javascript reload the page, thus triggering another request. This
request triggers the 500 error.

I am guessing request #3 give 500 because the server is busy on #2 and
app engine couldn't spin up another instance?

I am setting the queue delay to 10 seconds and see if this will
alleviate the problem.

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[appengine-java] Re: recommendation on using maxmind geoip

@Ikai , thank you for responding. I noticed your blog before posting
here. one question, which will faster performance, put the binary in
blockstore and read with new File(..) or use import csv into datastore
like what you did ?

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[appengine-java] Re: recommendation on using maxmind geoip

@Ikai , thank you for responding. I noticed your blog before posting
here. one question, which will faster performance, put the binary in
blockstore and read with new File(..) or use import csv into datastore
like what you did ?

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[appengine-java] java.io.RandomAccessFile BlockStore

may i know how to use java.io.RandomAccessFile to read big file from
BlockStore ?

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[appengine-java] Re: uploaded file how to view in browser

2010-10-26 Thread prabu

Hi..
   Thanks lot for ur reply

response.setContentType(application/pdf);

response.setHeader(Content-disposition,inline; filename=test.pdf);

OutputStream out = response.getOutputStream();

out.write(fileBlob.getBytes());


In this way i was tried...

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Re: [appengine-java] Re: uploaded file how to view in browser

2010-10-26 Thread A. Stevko

use Content Type application/octet-stream for download
and Content Type  application/pdf to view

On Tue, Oct 26, 2010 at 9:09 PM, prabu prabuc...@gmail.com wrote:

 Hi..
   Thanks lot for ur reply

 response.setContentType(application/pdf);

 response.setHeader(Content-disposition,inline; filename=test.pdf);

 OutputStream out = response.getOutputStream();

 out.write(fileBlob.getBytes());


 In this way i was tried...

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[appengine-java] Re: recommendation on using maxmind geoip

hello @Ikai, is it required to use mapreduce . why not get the byte
stream from blockstore and create  new file(..) ? there is no limit on
new file(..) and byte[] array in gae right?

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[google-appengine] Fwd: Image Upload

2010-10-26 Thread Massimiliano

Dear All,
could someone help me with this?

Regards

Massimiliano

-- Forwarded message --
From: Massimiliano massimiliano.pietr...@gmail.com
Date: 2010/10/22
Subject: Image Upload
To: google-appengine@googlegroups.com


Dear All,
I'm building a gallery and I'm allowing users to upload their images, but I
want all the images with a specific width in the blobstore. I'm trying to
using the Image Api, but I can't understand how.

This is my code, could someone help me?

class UploadHandler(blobstore_handlers.BlobstoreUploadHandler):
 def post(self):
upload_files = self.get_uploads('File')
blob_info = upload_files[0]
 self.request.get('Nick')
frasi = FRASI()
frasi.frase = self.request.get('Nick')
 frasi.link = blob_info.key()
frasi.put()
self.redirect(/)

Thanks

Max

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[google-appengine] Re: Instances, cold start and pending_ms

2010-10-26 Thread Matija

I am not sure that they are not using tasks or crons for auto-scaling
threshold. Simply because because average latency is simply arithmetic
mean of every instance latency. I have simple user-facing request that
starts chain of 15 tasks. I have cold start for this user-facing
request and second cold start for fifth task. With two instances now
servicing only tasks, average latency is changed because of every task
instance latency and although my task usually have let's say 200 ms
latency, because of this pending_ms time average latency is 662.2 ms.
But who can predict what will happen with 50 clients (this is web
application, not web page) how can I be sure that in this situation
there will not be too big pending time, maybe even
DeadlineExceededException only because of this pending_ms time
included in average latency.

On Oct 26, 3:27 am, Julian Namaro namarojul...@gmail.com wrote:
 The first number is used for average latency, not cpu_ms, and the auto-
 scaling threshold is computed only from user-facing request, not tasks
 or crons.

 Your numbers seems quite good, nothing to worry about I think. Are you
 experiencing a specific problem ?

 On Oct 23, 12:22 am, Matija matija.jerko...@gmail.com wrote:



  3. If my request has these performance data: 188ms 5269cpu_ms
  5133api_cpu_ms.

  Does 188 ms counts for average latency (for new instances) or 5269 ms
  (cpu time) ?

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[google-appengine] Re: Frequent deadline exceeded errors.

2010-10-26 Thread Carlos Ble

Is there a way to optimize Gae-Django-Helper load time?

Thanks

On 26 oct, 00:37, Geoffrey Spear geoffsp...@gmail.com wrote:
 On Oct 25, 12:37 pm, Carlos Ble ble.jur...@gmail.com wrote:

  This answer does not help Ikai. We are facing this problem even in
  urls that just load and render a simple form.

 ...After your Django install loads 90% of the modules in pypi.

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[google-appengine] Re: Blobstore upload handler is Base64 encoding strings?

2010-10-26 Thread Kenneth

This is a pretty shocking bug (or lack of documentation?) from
Google.  There doesn't appear to be a consistent way to decode the
post results that come from the BlobstoreUploadHandler.  There was a
bug in the issues list for this but I can't find it.  I should put in
another one really but there doesn't seem to be any point.

What I do is when the user hits the submit button I send the form
results via an ajax request and once that returns I submit the form to
do the file upload.

Pretty sad you have to do that and it means you're requiring
javascript for something that really shouldn't need it.

On Oct 25, 10:49 am, Agustin Horischnik agu...@gmail.com wrote:
 Hey, no luck with this? Did you solve this at all?

 On Aug 31, 12:40 pm, Agustin Horischnik agu...@gmail.com wrote:







  I think I'm having the same issue...

  I have a multi-part form posting to ablobstoreuploadhandler.
  There's four form fields:

  2 input type=file
  1 input type=text
  1 textarea

  Those map to...

  2blobstore.BlobReferenceProperty
  1 StringProperty
  1 TextProperty

  ... respectively, on my model class.

  And the problem is... when I submit an input string such as á é í ó ú
  and ñ, I get: IuEg6SDtIPMg+iBhbmQg8SI=, both on the StringProperty
  and TextProperty.
  At least, this is what I see on the Data viewer or when I output on
  the app.

  Any workarounds you can think of? Anybody else is having this problem?

  On Aug 3, 3:54 pm, ekampf eka...@gmail.com wrote:

   yep..
   It doesnt happend on the local dev server... its definately something
   undocumented happening on AppEngine

   On Aug 3, 10:54 am, alon alon.car...@gmail.com wrote:

it outputs as abase64string? im guessing the post is multi-part post
right?

On Aug 3, 10:39 am, ekampf eka...@gmail.com wrote:

 This happens when text fields are sent via POST and go through the
Blobstoreuploadhandler.
 When English text is used I get the text.
 When Hebrew is used I get abase64string...

 I'm not looking at the datastore dashboard. I'm looking at the actual
 POST data (via logging)

 On Aug 3, 10:18 am, alon alon.car...@gmail.com wrote:

  Does that happen everytime on theblobstoreonly api? or regular text 
  -

   datastore?

  One more thing, there is a huge difference on how the text is being
  displayed on the datastore dashboard. are you sure its being saved 
  as
 base64? the pageencodingfor the production datastore browser is
  massed up and cant display hebrew correctly in oppose to the local 
  dev
  version which has utf8encodingdisplay.

  On Jul 23, 2:09 pm, ekampf eka...@gmail.com wrote:

   I have a form with a file input and a text input field.
   When users type Hebrew text I get aBase64encoded string on the
   server. When typing English I get a nonBase64string.
   On the development server I get a regular Unicode string (what I'd
   expect)

   Cant find any mentions of this in the docs.
   What the behavior I should expect on production? Is this a bug?

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Re: [google-appengine] mapreduce and cron job

2010-10-26 Thread djidjadji

You must use the control module from the mapreduce module
One line in the doc tells you to chain MR tasks use a done callback
and start a new one with the control submodule.
Use this method to start a task from inside a cron handler
Have a look at mapreduce/control.py and the test code for control.py

from mapreduce import control as mr_control

class MRCronHandler(webapp.RequestHandler):
  def get(self):
mr_control.start_map(
  Name of the task,
  mymr.sometask,
  mapreduce.input_readers.DatastoreInputReader,
  {entity_kind: models.SomeModel,
  },
  mapreduce_parameters={done_callback: /mr-end-task},
)
self.response.headers['Content-Type'] = 'text/plain'
self.response.out.write('MR Cron Started')


2010/10/24 slash ewan...@gmail.com:
 Hi, everybody

     I learned a lot from this group and Nick's blog. Thanks.

     I want to combine mapreduce and cron job in order to run mapping
 automatically. I did lots of search in this group and from other
 resource but I got nothing.

    I'm able to run cron job and mapreduce separately. But I really
 don't know how to combine them. Maybe I missed something really basic.

    Could anyone tell me how to run mapreduce with cron job? I didn't
 find the corresponding url to trigger mapreduce. Thank you.

    PS: I know that it's possible to do this and I subscribe issue 41
 in appengine-mapreduce project.

    Here is the link: 
 http://code.google.com/p/appengine-mapreduce/issues/detail?id=41.

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[google-appengine] Re: Image Upload

2010-10-26 Thread Stephen



On Oct 22, 10:11 pm, Massimiliano massimiliano.pietr...@gmail.com
wrote:
 Dear All,
 I'm building a gallery and I'm allowing users to upload their images, but I
 want all the images with a specific width in the blobstore. I'm trying to
 using the Image Api, but I can't understand how.

 This is my code, could someone help me?

 class UploadHandler(blobstore_handlers.BlobstoreUploadHandler):
  def post(self):
 upload_files = self.get_uploads('File')
 blob_info = upload_files[0]
  self.request.get('Nick')
 frasi = FRASI()
 frasi.frase = self.request.get('Nick')
  frasi.link = blob_info.key()
 frasi.put()
 self


The old way to do it:

  
http://code.google.com/appengine/docs/python/images/overview.html#Transforming_Images_from_the_Blobstore


The new way to do it:

  
http://code.google.com/appengine/docs/python/images/functions.html#Image_get_serving_url

  example: 
http://blog.tinisles.com/2010/08/app-engines-high-performance-image-serving/

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Re: [google-appengine] Re: Image Upload

2010-10-26 Thread Massimiliano

Great! Thanks!
This is really easy to be used!

2010/10/26 Stephen sdea...@gmail.com



 On Oct 22, 10:11 pm, Massimiliano massimiliano.pietr...@gmail.com
 wrote:
  Dear All,
  I'm building a gallery and I'm allowing users to upload their images, but
 I
  want all the images with a specific width in the blobstore. I'm trying to
  using the Image Api, but I can't understand how.
 
  This is my code, could someone help me?
 
  class UploadHandler(blobstore_handlers.BlobstoreUploadHandler):
   def post(self):
  upload_files = self.get_uploads('File')
  blob_info = upload_files[0]
   self.request.get('Nick')
  frasi = FRASI()
  frasi.frase = self.request.get('Nick')
   frasi.link = blob_info.key()
  frasi.put()
  self


 The old way to do it:


 http://code.google.com/appengine/docs/python/images/overview.html#Transforming_Images_from_the_Blobstore


 The new way to do it:


 http://code.google.com/appengine/docs/python/images/functions.html#Image_get_serving_url

  example:
 http://blog.tinisles.com/2010/08/app-engines-high-performance-image-serving/

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[google-appengine] Re: mapreduce and cron job

2010-10-26 Thread slash

Thanks a lot, djidjadji. I'll have a try.

On Oct 26, 6:29 pm, djidjadji djidja...@gmail.com wrote:
 You must use the control module from the mapreduce module
 One line in the doc tells you to chain MR tasks use a done callback
 and start a new one with the control submodule.
 Use this method to start a task from inside a cron handler
 Have a look at mapreduce/control.py and the test code for control.py

 from mapreduce import control as mr_control

 class MRCronHandler(webapp.RequestHandler):
   def get(self):
     mr_control.start_map(
       Name of the task,
       mymr.sometask,
       mapreduce.input_readers.DatastoreInputReader,
       {entity_kind: models.SomeModel,
       },
       mapreduce_parameters={done_callback: /mr-end-task},
     )
     self.response.headers['Content-Type'] = 'text/plain'
     self.response.out.write('MR Cron Started')

 2010/10/24 slash ewan...@gmail.com:

  Hi, everybody

      I learned a lot from this group and Nick's blog. Thanks.

      I want to combine mapreduce and cron job in order to run mapping
  automatically. I did lots of search in this group and from other
  resource but I got nothing.

     I'm able to run cron job and mapreduce separately. But I really
  don't know how to combine them. Maybe I missed something really basic.

     Could anyone tell me how to run mapreduce with cron job? I didn't
  find the corresponding url to trigger mapreduce. Thank you.

     PS: I know that it's possible to do this and I subscribe issue 41
  in appengine-mapreduce project.

     Here is the 
  link:http://code.google.com/p/appengine-mapreduce/issues/detail?id=41.

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Re: [google-appengine] Re: java.security.AccessControlException while Accessing a Read-Only HSQLDB Datababse with Hibernate

2010-10-26 Thread Fork Labs

Hello Nacho,

What do you mean by using a datastore?

Regards

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[google-appengine] Re: Prod Env utils - Interactive Console, Memcache manager, XMPP bot, IncomingMail Stub

2010-10-26 Thread aschmid

thanks for the hint.

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[google-appengine] Error code 203 - What is meaning of this error

2010-10-26 Thread Matija

I have a rather complex code for traveling salesman problem that is
trowing this error. I have located lines that produce this error and
it is pretty strange.

int[] sequence = new int[dimension];

private void reverse(int i, int j, final int ai[]) {
int i1 = j - i;
if (i1  0)
i1 += dimension;
i1 = i1 / 2 + 1;
int l, k;
for (l = 0; l  i1; l++) {
k = sequence[i];
sequence[i] = sequence[j];
ai[sequence[i]] = i;
//sequence[j] = k;
//ai[sequence[j]] = j;
if (++i = dimension)
i -= dimension;
if (--j  0)
j += dimension;
}
}

If I leave commented this two lines task request finishes with this
performance parameters (ms=842 cpu_ms=97 api_cpu_ms=0).

If I uncomment this two lines I get:

ms=40087 cpu_ms=0 api_cpu_ms=0 exit_code=203 throttle_code=1

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)

Why ?!

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Re: [google-appengine] Re: Uploading Indexes - Server Error

2010-10-26 Thread Rohit

+1 in the same situation as you.

On Mon, Oct 25, 2010 at 7:49 PM, Eli Jones eli.jo...@gmail.com wrote:

Oh, the error message it shows when I run appcfg.py update is:

Your app was updated, but there was an error updating your indexes. Please
retry later with appcfg.py update_indexes.

On Mon, Oct 25, 2010 at 10:48 PM, Eli Jones eli.jo...@gmail.com wrote:

I am able to update my app code with appcfg.py update.. but it always
throws an error when it gets to the upload indexes part.

If I try to only update_indexes, I keep getting the error as well:

Server: appengine.google.com.
Uploading index definitions.
Error 500: --- begin server output ---

Server Error (500)
A server error has occurred.
--- end server output ---

I presume this is a transient issue and will be cleared up soon.. but I
have nothing else to do while I wait.. so I am posting a message here in
case some bored soul is watching the list.

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[google-appengine] Index problems. 500 errors when trying to view datatstore indexes. can't update from appcfg.py

2010-10-26 Thread Rohit Jenveja

This morning I vacuumed a bunch of indicies and added some as well. I
was monitoring the datastore indexes page throughout the day and it
was barely moving. I have about 40 gigs worth of data in the datastore
(mostly blobs). It now 500s anytime I try to view the status. I also
tried to appcfg update but it tells me it couldn't update the indexes.
When I do appcfg update_indexes, it returns a 500 as well. Any idea
what's happening?

Thanks,
Rohit

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[google-appengine] When using an automatically Long id as a key, is it possible the Long value is a zero?

2010-10-26 Thread Tapir

I want to check whethor or not a reference id is invalid by comparing
it with a zero.
Works?

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[google-appengine] Can't create application

2010-10-26 Thread brian

I just signed up for app engine and validated the account with SMS.
When I try to create my first application nothing happens. I enter a
app id and it says it's available. Then when I click Create
Application it takes me back to the start page with no applications
showing. When I try to add the application again it now says the app
id is not available. I've tried several times with new app ids that
are always available and it doesn't do anything.

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Re: [google-appengine] Re: Uploading Indexes - Server Error

2010-10-26 Thread supercobra

I got the same this weekend. Was gone after few hours...

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On Mon, Oct 25, 2010 at 10:08 PM, Stephen Johnson
onepagewo...@gmail.com wrote:
 I'm getting the same error, but with Java. Also, clicking on Indexes in
 Dashboard goes to error page.
 Stephen

 The error during deploy is:

 Unable to update app: Error posting to URL:
 https://appengine.google.com/api/datastore/index/add?app_id=APPIDversion=VERSION;
 500 Internal Server Error

 Server Error (500)
 A server error has occurred.


 On Mon, Oct 25, 2010 at 7:49 PM, Eli Jones eli.jo...@gmail.com wrote:

 Oh, the error message it shows when I run appcfg.py update is:
 Your app was updated, but there was an error updating your indexes.
 Please retry later with appcfg.py update_indexes.

 On Mon, Oct 25, 2010 at 10:48 PM, Eli Jones eli.jo...@gmail.com wrote:

 I am able to update my app code with appcfg.py update.. but it always
 throws an error when it gets to the upload indexes part.
 If I try to only update_indexes, I keep getting the error as well:
 Server: appengine.google.com.
 Uploading index definitions.
 Error 500: --- begin server output ---
 Server Error (500)
 A server error has occurred.
 --- end server output ---

 I presume this is a transient issue and will be cleared up soon.. but I
 have nothing else to do while I wait.. so I am posting a message here in
 case some bored soul is watching the list.

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[google-appengine] Channel API?

2010-10-26 Thread Blixt

What happened to this? A few months ago it seemed to be just around
the corner, but now I haven't seen any mention on it for ages. I have
been told by a person at Google that I should be able to get access to
the preview somehow, but I never figured out how...

I'm curious about this since I have several projects half-way there
but that got put on ice since I was waiting for the Channel API.

Does anyone know the status of the Channel API, or how to get access
to the preview?

/Blixt

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[google-appengine] Re: Channel API?

2010-10-26 Thread Blixt

Okay, my initial search returned results from July, but some paging
found this rather recent post:
http://groups.google.com/group/google-appengine/browse_thread/thread/e6efd42c17621d87/cf8e3cbf4d4956b6?lnk=gstq=channel

So I guess that answers one part of my question. My other question:
How do I find out whether I'm on the test list? I filled in the
spreadsheet for it pretty early, but haven't really found any
additional information about it.

/Blixt

On Oct 26, 7:33 pm, Blixt andreasbl...@gmail.com wrote:
 What happened to this? A few months ago it seemed to be just around
 the corner, but now I haven't seen any mention on it for ages. I have
 been told by a person at Google that I should be able to get access to
 the preview somehow, but I never figured out how...

 I'm curious about this since I have several projects half-way there
 but that got put on ice since I was waiting for the Channel API.

 Does anyone know the status of the Channel API, or how to get access
 to the preview?

 /Blixt

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[google-appengine] Cron scheduling at runtime

2010-10-26 Thread Vibhuti Gupta

Hi

I need to do runtime scheduling for certain tasks in my application. In GAE
we need to modify cron.xml and upload it to the server.
I am using java and am not able to find a way to accomplish this at runtime.
Anyone has any ideas regarding this!!

Regards

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[google-appengine] Re: Can't create application

2010-10-26 Thread Geoffrey Spear

Access the dashboard from http://appengine.google.com/a/firespotter.com

On Oct 25, 9:36 pm, brian a...@firespotter.com wrote:
 I just signed up for app engine and validated the account with SMS.
 When I try to create my first application nothing happens. I enter a
 app id and it says it's available. Then when I click Create
 Application it takes me back to the start page with no applications
 showing. When I try to add the application again it now says the app
 id is not available. I've tried several times with new app ids that
 are always available and it doesn't do anything.

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[google-appengine] Re: Can't create application

2010-10-26 Thread brian

Just figured that out. Thanks. It was because I created a Google
Account with my apps account. It probably shouldn't let me create
things from appengine.google.com with my apps account then.

On Oct 26, 11:18 am, Geoffrey Spear geoffsp...@gmail.com wrote:
 Access the dashboard fromhttp://appengine.google.com/a/firespotter.com

 On Oct 25, 9:36 pm, brian a...@firespotter.com wrote:



  I just signed up for app engine and validated the account with SMS.
  When I try to create my first application nothing happens. I enter a
  app id and it says it's available. Then when I click Create
  Application it takes me back to the start page with no applications
  showing. When I try to add the application again it now says the app
  id is not available. I've tried several times with new app ids that
  are always available and it doesn't do anything.

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Re: [google-appengine] When using an automatically Long id as a key, is it possible the Long value is a zero?

2010-10-26 Thread 风笑雪

The only way is to fetch it.

ReferenceProperty doesn't care about whether the referenced entity is
exist, it just stores a Key object.

--
keakon



On Tue, Oct 26, 2010 at 11:40 PM, Tapir tapir@gmail.com wrote:
 I want to check whethor or not a reference id is invalid by comparing
 it with a zero.
 Works?

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Re: [google-appengine] Re: Channel API?