date:20100906

[appengine-java] Query BlobInfo in Java?

2010-09-06 Thread Peter Liu

Hi all,

Anyone know a simple way to query BlobInfo?

Simple use case will be query the BlobInfo that has a specific file
name.

It seems there's a method to query BlobInfo for Python but I can't
find it for java.

Thanks!

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[appengine-java] Re: Security problem with App Engine application

2010-09-06 Thread Andy Faulkner

Thanks for your contributions guys. Had got myself a confused with the
need to use AppEngine which, as John points out, I don't need to in
this context.

Andy

On Sep 3, 9:23 am, John Patterson jdpatter...@gmail.com wrote:
 You can write a local Java application that reads data using the JDBC  
 driver and inserts it into your datastore using the RemoteDatastore  
 library:

 http://code.google.com/p/remote-datastore/

 I use this code to read local data from a CSV file and push it to  
 either my local App Engine environment for development or the  
 production environment.

 On 2 Sep 2010, at 22:28, Andy Faulkner wrote:



  Hi,

  I'm trying to develop an AppEngine application in Java, that will read
  some values from a local MSSQL database on our internal network using
  Microsoft's JDBC driver, and then insert those values into a reference
  spreadsheet in our Google Docs domain.

  I'm falling at the first hurdle!

  I have Eclipse Helios, with Version 1.3.7 of the App Engine SDK Plugin
  installed.

  So, I create a new App Engine project (HelloWorld) and when I run
  this, it works just fine.

  And then, just to get things going, I have modified the doGet method
  so that it looks like this (I'm expecting that this will extract some
  records from my database, and then print them to the HTML page) - just
  want to get things going before I really get to work.

  @SuppressWarnings(serial)
  public class VisionConnectorServlet extends HttpServlet {
     public void doGet(HttpServletRequest req, HttpServletResponse resp)
                     throws IOException {

             resp.setContentType(text/plain);

             // Declare the JDBC objects.
           Connection con = null;
           Statement stmt = null;
           ResultSet rs = null;

           try {
              // Establish the connection.
              Class.forName(com.microsoft.sqlserver.jdbc.SQLServerDriver);

              SQLServerDataSource ds = new SQLServerDataSource();
              ds.setUser(DeltekVision);
              ds.setPassword(Password1);
              ds.setServerName(server02);
              ds.setPortNumber(1433);
              ds.setDatabaseName(vision2);
              con = ds.getConnection();

              String SQL = SELECT * FROM CL where status='A';
              stmt = con.createStatement();
              rs = stmt.executeQuery(SQL);

              // Iterate through the data in the result set and display
  it.
              while (rs.next()) {
                     resp.getWriter().println(Client:  + 
  rs.getString(Name));
                     resp.getWriter().println(br/);
              }
           }

           // Handle any errors that may have occurred.
           catch (Exception e) {
              e.printStackTrace();
           }
           finally {
              if (rs != null) try { rs.close(); } catch(Exception e) {}
              if (stmt != null) try { stmt.close(); } catch(Exception e)
  {}
              if (con != null) try { con.close(); } catch(Exception e) {}
              System.exit(1);
           }

     }

  When I run the application the Jetty server fires up as expected (so
  everything builds OK) but when I access the web page, kaboom:

  java.security.AccessControlException: access denied
  (java.net.SocketPermission cc:1433 connect,resolve)
     at
  java
  .security
  .AccessControlContext.checkPermission(AccessControlContext.java:
  323)
     at
  java.security.AccessController.checkPermission(AccessController.java:
  546)
     at java.lang.SecurityManager.checkPermission(SecurityManager.java:
  532)
     at com.google.appengine.tools.development.DevAppServerFactory
  $CustomSecurityManager.checkPermission(DevAppServerFactory.java:166)
     at java.lang.SecurityManager.checkConnect(SecurityManager.java:1034)
     at
  com
  .microsoft
  .sqlserver
  .jdbc
  .SQLServerConnectionSecurityManager
  .checkConnect(SQLServerConnection.java:
  3229)
     at
  com
  .microsoft
  .sqlserver
  .jdbc.ServerPortPlaceHolder.doSecurityCheck(FailOverInfo.java:
  144)
     at
  com
  .microsoft
  .sqlserver.jdbc.ServerPortPlaceHolder.init(FailOverInfo.java:
  135)
     at
  com
  .microsoft
  .sqlserver
  .jdbc
  .SQLServerConnection.primaryPermissionCheck(SQLServerConnection.java:
  968)
     at
  com
  .microsoft
  .sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:
  800)
     at
  com
  .microsoft
  .sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:
  700)
     at
  com
  .microsoft
  .sqlserver
  .jdbc
  .SQLServerDataSource.getConnectionInternal(SQLServerDataSource.java:
  593)
     at
  com
  .microsoft
  .sqlserver
  .jdbc.SQLServerDataSource.getConnection(SQLServerDataSource.java:
  57)
     at
  com
  .integrity
  .visionconnector
  .VisionConnectorServlet.doGet(VisionConnectorServlet.java:
  31)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:693)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)

[appengine-java] Re: Query BlobInfo in Java?

2010-09-06 Thread Sergio Lopes

I'm using the Datastore API to query __BlobInfo__ entity directly.
In my case, for example, I can have multiple versions of the same
filename but I need to get the last one.
So:

 Query query = new Query(__BlobInfo__);
 query.addFilter(filename, FilterOperator.EQUAL, filename);
 query.addSort(creation, SortDirection.DESCENDING);

 DatastoreService datastore =
DatastoreServiceFactory.getDatastoreService();
 PreparedQuery pq = datastore.prepare(query);
 ListEntity entList = pq.asList(FetchOptions.Builder.withLimit(1));

Hope that helps...


On 6 set, 05:13, Peter Liu tinyee...@gmail.com wrote:
 Hi all,

 Anyone know a simple way to query BlobInfo?

 Simple use case will be query the BlobInfo that has a specific file
 name.

 It seems there's a method to query BlobInfo for Python but I can't
 find it for java.

 Thanks!

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[appengine-java] Can't flush response

2010-09-06 Thread Sergio Lopes

Hi everybody

I'm trying to use flushBuffer() of HttpServletResponse. I have some
use case here where I need to send some response to the user and later
send a little more.

But flushBuffer() doesn't seem to be working in production. Locally
everything works with the SDK, but in production the response only
shows up when the last byte is sent (not when flushBuffer is called).

Any idea?

Thanks
Sérgio

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[appengine-java] Spring AOP on App Engine?

2010-09-06 Thread Vikas Hazrati

Has anyone got spring aop working with GAE? I get the following issue
deploying aop on the app engine

Error creating bean with name 'entityManagerFactory': Post-processing
of the FactoryBean's object failed; nested exception is
java.lang.StackOverflowError
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:
480)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory
$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)

As always the loca dev environment 1.3.7 does not give any issues and
all my aspects work fine there. I have a timesheet and financial app
which and I do not want to log the audit calls at all the places. I
have defined the relevant pointcuts and auditing should be done at
those points.

Any suggestions / solutions?

Regards | Vikas
www.inphina.com

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[appengine-java] Re: Can't flush response

2010-09-06 Thread Peter Ondruska

It will not work, GAE in production will send response at once. See
http://code.google.com/appengine/docs/java/runtime.html#Responses

On Sep 6, 10:42 am, Sergio Lopes slo...@gmail.com wrote:
 Hi everybody

 I'm trying to use flushBuffer() of HttpServletResponse. I have some
 use case here where I need to send some response to the user and later
 send a little more.

 But flushBuffer() doesn't seem to be working in production. Locally
 everything works with the SDK, but in production the response only
 shows up when the last byte is sent (not when flushBuffer is called).

 Any idea?

 Thanks
 Sérgio

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[appengine-java] Re: Can't flush response

2010-09-06 Thread Sergio Lopes

Too bad... thanks, Peter

On 6 set, 07:39, Peter Ondruska peter.ondru...@gmail.com wrote:
 It will not work, GAE in production will send response at once. 
 Seehttp://code.google.com/appengine/docs/java/runtime.html#Responses

 On Sep 6, 10:42 am, Sergio Lopes slo...@gmail.com wrote:



  Hi everybody

  I'm trying to use flushBuffer() of HttpServletResponse. I have some
  use case here where I need to send some response to the user and later
  send a little more.

  But flushBuffer() doesn't seem to be working in production. Locally
  everything works with the SDK, but in production the response only
  shows up when the last byte is sent (not when flushBuffer is called).

  Any idea?

  Thanks
  Sérgio

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[appengine-java] Re: ClientLogin Service name required if all I want is datastore access?

2010-09-06 Thread Dan Billings

The answer is ah, which does not log in to any services

On Sep 3, 3:34 pm, Dan Billings debil...@gmail.com wrote:
 I just want to have access to the User object on the server-side, but
 I don't need access to any of the servers.

 I the service name required?  The documentation says it is, but this
 seems so basic it may be possible.

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[appengine-java] Re: Query BlobInfo in Java?

2010-09-06 Thread Peter Liu

Just what I needed. Thank you.

On Sep 6, 1:38 am, Sergio Lopes slo...@gmail.com wrote:
 I'm using the Datastore API to query __BlobInfo__ entity directly.
 In my case, for example, I can have multiple versions of the same
 filename but I need to get the last one.
 So:

  Query query = new Query(__BlobInfo__);
  query.addFilter(filename, FilterOperator.EQUAL, filename);
  query.addSort(creation, SortDirection.DESCENDING);

  DatastoreService datastore =
 DatastoreServiceFactory.getDatastoreService();
  PreparedQuery pq = datastore.prepare(query);
  ListEntity entList = pq.asList(FetchOptions.Builder.withLimit(1));

 Hope that helps...

 On 6 set, 05:13, Peter Liu tinyee...@gmail.com wrote:

  Hi all,

  Anyone know a simple way to query BlobInfo?

  Simple use case will be query the BlobInfo that has a specific file
  name.

  It seems there's a method to query BlobInfo for Python but I can't
  find it for java.

  Thanks!

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[appengine-java] Re: Deleting a version of an app gives error in the admin console

2010-09-06 Thread oth

John,

I have the same issue. If you find a solution please let me know.

Thanks

On Sep 5, 4:38 pm, John demowee...@gmail.com wrote:
 AppEngine Team,

 I have a version of my app which gives me a server error whenever I
 try to delete it from the admin console:

 Server Error

 A server error has occurred.

 I can delete every other version just fine.

 Email me directly for app id / version info.

 Thanks,

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[appengine-java] Google Apps problem with Google App engine Admin Console Display

2010-09-06 Thread powell...@gmail.com

Before our university, Elon, went to Google Apps for the students, the
students who had gmail accounts such as d...@gmail.com could easily
request and appengine account, create an application and then have it
displayed in the app engine admin console dashboard. If they went to
http://appengine.google.com and signed in then they were automatically
redirected to the Appengine admin console dashboard to see a list of
their applications.

This summer, the university went to Google Apps for students  and the
students have google email accounts but with a university extension.
For example, their student email is now d...@elon.edu and this uses
gmail. When a student uses this google account id of d...@elon.edu, the
student can apply for an appengine account, get the account and then
get prompted for an Application Id. The application gets successfully
created but the admin console dashboard is not displayed. If the
student goes to http://appengine.google.com and signs in as
d...@elon.edu then the student is prompted to create an application
instead of having a list of applications displayed to choose from for
display on the dashboard. The question is how does a student with a
university google docs account access the appengine admin console
dashboard when the account has a @elon.edu  university instead of
@gmail.com.

Dave

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Re: [appengine-java] Spring AOP on App Engine?

2010-09-06 Thread Guillermo Schwarz

Use Dynamic Proxy instead, it works fine.

Cheers,
Guillermo.

On Mon, Sep 6, 2010 at 5:55 AM, Vikas Hazrati vhazr...@gmail.com wrote:

Has anyone got spring aop working with GAE? I get the following issue
deploying aop on the app engine

Error creating bean with name 'entityManagerFactory': Post-processing
of the FactoryBean's object failed; nested exception is
java.lang.StackOverflowError
at

org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:
480)
at

org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory
$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)

As always the loca dev environment 1.3.7 does not give any issues and
all my aspects work fine there. I have a timesheet and financial app
which and I do not want to log the audit calls at all the places. I
have defined the relevant pointcuts and auditing should be done at
those points.

Any suggestions / solutions?

Regards | Vikas
www.inphina.com

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Saludos cordiales,

Guillermo Schwarz
Sun Certified Enterprise Architect

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[appengine-java] Problem with inheritance and JDO

2010-09-06 Thread lisandrodc

Hi all,
  I've used hibernate for a while, and I'm having a bit of trouble
switching to JDO.  I have several entities that all entities will
share.  Rather than a parent table, I'd prefer these columns be
embedded directly in each entity.  As such, I've defined my abstract
entity and child entity in the classes below.  However, whenever I
try
to run my unit tests or the jetty environment, I always receive the
following error.
org.datanucleus.exceptions.NoPersistenceInformationException: The
class com.onwebconsulting.inventory.model.Part is required to be
persistable yet no Meta-Data/Annotations can be found for this class.
Please check that the Meta-Data/annotations is defined in a valid
file
location.]]
According to my Eclipse console I have 1 class that has been
Enhanced.  Any ideas what I'm doing wrong?
DataNucleus Enhancer completed with success for 1 classes. Timings :
input=268 ms, enhance=51 ms, total=319 ms. Consult the log for full
details
@Inheritance(strategy = InheritanceStrategy.NEW_TABLE)
public class Part extends Auditable{
@Persistent
private String name;
@Persistent
private String description;
@Persistent
private String partNumber;
@Persistent
private long quantity;
@Persistent
private String manuacturersPartNumber;
@Persistent
private String manufacturerName;
@Persistent
private String suppliersPartNumber;
@Persistent
private String supplierName;
@Persistent
private String supplierWebsite;
@Persistent
private float salePrice;
@Persistent
private float supplierPrice;
... Getters and Setters
}
@PersistenceCapable(identityType = IdentityType.APPLICATION)
@Inheritance(strategy = InheritanceStrategy.SUBCLASS_TABLE)
public abstract class Auditable {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key id;
@Persistent
private Date createDate;
@Persistent
private Date updatedDate;
@Persistent
private long version;
public Key getId() {
return id;
}
public Date getCreateDate() {
return createDate;
}
public Date getUpdatedDate() {
return updatedDate;
}
public long getVersion(){
return version;
}

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Re: [appengine-java] Re: Query BlobInfo in Java?

2010-09-06 Thread Gladys Anne Nicdao

Hi! Are you using a billable account in appengine? I'm wondering if I can
use the blobstore service even with a free account. If not, are there other
alternatives for blobstore so that I can upload and retrieve a file? Thanks

On Tue, Sep 7, 2010 at 2:57 AM, Peter Liu tinyee...@gmail.com wrote:

Just what I needed. Thank you.

On Sep 6, 1:38 am, Sergio Lopes slo...@gmail.com wrote:
I'm using the Datastore API to query __BlobInfo__ entity directly.
In my case, for example, I can have multiple versions of the same
filename but I need to get the last one.
So:

Query query = new Query(__BlobInfo__);
query.addFilter(filename, FilterOperator.EQUAL, filename);
query.addSort(creation, SortDirection.DESCENDING);

DatastoreService datastore =
DatastoreServiceFactory.getDatastoreService();
PreparedQuery pq = datastore.prepare(query);
ListEntity entList = pq.asList(FetchOptions.Builder.withLimit(1));

Hope that helps...

On 6 set, 05:13, Peter Liu tinyee...@gmail.com wrote:

Hi all,

Anyone know a simple way to query BlobInfo?

Simple use case will be query the BlobInfo that has a specific file
name.

It seems there's a method to query BlobInfo for Python but I can't
find it for java.

Thanks!

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[appengine-java] jsonengine: a JSON storage that requires no server-side coding

2010-09-06 Thread kazunori_279

Hi all,

We have created a JSON storage engine called jsonengine:

-
http://code.google.com/p/jsonengine/

jsonengine is a simple and ultra-scalable JSON storage that works on
Google App Engine. You do not need any server-side Java/Python coding.
Just deploy a jsonengine to App Engine cloud with your appid, and you
can call the REST API from any HTTP client (JavaScript?, Flash, iPhone/
iPad/Android or etc) to get/put/search any kind of JSON documents you
want to use.
-

Any feedback are welcome!

Thanks,

Kaz

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Re: [appengine-java] jsonengine: a JSON storage that requires no server-side coding

2010-09-06 Thread Gal Dolber

Had the same idea a time ago!
Looks great!

2010/9/6 kazunori_279 kazunori...@gmail.com

Hi all,

We have created a JSON storage engine called jsonengine:

-
http://code.google.com/p/jsonengine/

jsonengine is a simple and ultra-scalable JSON storage that works on
Google App Engine. You do not need any server-side Java/Python coding.
Just deploy a jsonengine to App Engine cloud with your appid, and you
can call the REST API from any HTTP client (JavaScript?, Flash, iPhone/
iPad/Android or etc) to get/put/search any kind of JSON documents you
want to use.
-

Any feedback are welcome!

Thanks,

Kaz

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http://code.google.com/p/guit/

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[appengine-java] app eng java plugin not compatible with helios

2010-09-06 Thread syntheticperson

I tried to install google app engine java plugin for eclipse, but it
does not appear to be compatible with the latest helios release of
eclipse.

Cannot complete the install because one or more required items could
not be found.
  Software being installed: Google Plugin for Eclipse 3.5
1.3.3.v201006111302
(com.google.gdt.eclipse.suite.e35.feature.feature.group
1.3.3.v201006111302)
  Missing requirement: Google Plugin for Eclipse 3.5
1.3.3.v201006111302
(com.google.gdt.eclipse.suite.e35.feature.feature.group
1.3.3.v201006111302) requires 'org.eclipse.platform.feature.group
[3.5.0,3.6.0)' but it could not be found

Are there any plans to upgrade google plugin for:

Eclipse Java EE IDE for Web Developers.

Version: Helios Release
Build id: 20100617-1415

?

thanks
-synthetic person

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[appengine-java] Re: GWT and GAE: Uploading Files to Blobstore

2010-09-06 Thread Jayz

Hey,

I am stuck at exactly the same position. At the line -
form.setAction(url); and before getting to the servlet as pointed by
the url set in form action, I get the Java Heap Exception:
outOfMemoryError. Did you find any workarounds or solution?

~Jayz

On Aug 24, 2:50 pm, rapher heinrich.raph...@googlemail.com wrote:
 i even tried to upload very small files (~4kB), same exception ...

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[google-appengine] Re: how to use Fedrated Login for my google apps Engine

2010-09-06 Thread l.denardo

Can you please clarify the steps to get that kind of login working? I
can't find documentation about this.

I tried the following:

*Use an app with Google accounts API as authentication option,
accessed thru appspot.com.
Going to http://myapp.appspot.com/a/mydomain.com/ gives access to
general Google login page, which refuses Google Apps accounts.
Omitting final slash, i.e. http://myapp.appspot.com/a/mydomain.com
gives a 404.

*Use an application with Federated login as an option for
authentication, both accessed thru appspot and as a subdomain of my
domain.
Going to http://myapp.appspot.com/a/mydomain.com/ gives access to
general Google login page, which refuses Google Apps accounts, same as
before.

*Use an application restricted to my Google Apps domain accounts.
Accessing http://myapp.appspot.com/a/mydomain.com/ gives a 404 (this
is correct, since there should be no way for users outside my domain
to log in.

I can provide working URLs if this is needed.

Thanks for your advice
Regards
Lorenzo

On Sep 3, 9:12 pm, Ikai L (Google) ika...@google.com wrote:
This doesn't actually require using federated login: your users just have to
go to:

http://mytaskmanager.appspot.com/a/ubob.org

Federated login usually refers to OpenID:

http://code.google.com/appengine/articles/openid.html

On Thu, Sep 2, 2010 at 9:08 PM, Ehsan-ul-haq iehsa...@gmail.com wrote:
hi

i have create my Google Apps on Google Apps Engine (http://
mytasksmanager.appspot.com).

now i want to create a login interface where user can login in with
google and google apps account

i done my Google Account login but i need help how to login with other
Google Apps Accounts like eh...@ubob.org

Thanks

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[google-appengine] Re: GAE And ZPT

2010-09-06 Thread Tim Hoffman

Huh

Sorry I don't understand what you are actually trying to do.

I would say the variable you are trying to compare to is not in the
page template
expression engine dictionary.  (ie the name is not accessible by the
template)

I would need to see a great deal more of the template to work out what
you are doing, plus the context parsed to the render method.

to see if  the variable is accessible just put in div
tal:content=nocall: abc tal:on-error=string: variable abc not
defined/

T

On Sep 6, 1:57 pm, mugdha mnimka...@gmail.com wrote:
 yes i done same like this but it not accept it because it can't take
 variable it wants string value or hard coded value

 On Sep 6, 10:49 am, Tim Hoffman zutes...@gmail.com wrote:







  Hi

  The the rhs can be anything/variable/attrubute in scope.
  assuming abc is a variable.

  span tal:condition=python:prox==abc

  or something like that.

  T
  On Sep 6, 12:50 pm, mugdha mnimka...@gmail.com wrote:

   span tal:condition=python:switch=='Proximity'
     span tal:repeat=prox python:proximityList
        span tal:repeat=a python:range(10)nbsp;/span
            span tal:content=python:prox /br
                span tal:condition=python:prox=='Inductive'
           span tal:repeat=induc python:Inductive
               span tal:repeat=a python:range(12)nbsp;/span
           a href=# tal:attributes=id python:induc.id
   tal:content=python:induc.id onclick=javascript:searchLink(id);/
   abr
           /span
                /span
   /span
   /span

   In the above code instead of  inductive  word i have dyanamic word
python:abc   how i can write dynamic string in the right hand side
   of the tal:condition?- Hide quoted text -

  - Show quoted text -

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[google-appengine] Re: Uploading 1100 files...

2010-09-06 Thread l.denardo

Hello,
these times are pretty usual for me (Italy) and seem to depend on the
number of files you need to compile and upload.

I just uploaded a test (nearly empty) app, no GWT, one servlet and one
page. That took about 30 seconds.

My business app has numbers like your. I work in Java.
The cloning application files usually gives 700-900 files cloned. Of
these, 100 to 300 get uploaded each time I deploy an update.

Usually, depending on my bandwidth, upload and precompilation can take
3 to 10 minutes. 3-5 more minutes usually go wasted in the will check
again in XX seconds loop.
So 9 to 15 minutes are usual times to deploy for me.

Precompilation is a time-consuming step, which is explained here:

http://code.google.com/events/io/2010/sessions/whats-hot-in-java-for-app-engine.html
(last part of the session).
For what I understood, your files are divided in 4 bulks, which are
then compiled and then uploaded to GAE in compiled form (this is also
a good explanation of why no source is downloadable...no source is
uploaded actually, for what I understand).

Hope the session video helps.

Regards
Lorenzo

On Sep 5, 9:16 am, Jaroslav Záruba jaroslav.zar...@gmail.com wrote:
 Uploading my GWT-application to GAE takes eons lately. For instance, it
 takes 9-10 minutes to upload 275 files.
 Are those times something I should get used to or is GAE only experiencing
 some issues?

 Judging by what Eclipse outputs when uploading only a few files (like when I
 only modify server-side stuff), it seems that each file takes separate
 request to get uploaded. Is that right?

 Regards
  J. Záruba

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[google-appengine] Re: Datastore StringList or multiple rows?

2010-09-06 Thread ogterran

Thanks Robert.

On Sep 2, 10:20 am, Robert Kluin robert.kl...@gmail.com wrote:
 Hey Jon,
   Emails, users, and ip addresses (typically) look pretty different,
 mixing them is probably not a big deal;  So I suggested not creating
 separate models for emails, IPs, and users names to reduce the number
 of indexes you might need in the future.  For example, if you were
 have an 'active' property on the page that you needed to include while
 searching pages you could include that 'active' property on your
 PageIndex model too.  Then you would only need one composite index
 instead of three.  This may not matter for your application.  It also
 lets you (depending on list sizes) search based on, for instance, an
 email and an ip and GAE's internal merge-join will automatically be
 used.

   I would suggest thinking carefully about how you plan to search your
 data _and_ how you might need to maintain the data.  If you will need
 to specifically access the lists for specific types then I would
 either add the type property or maybe even use the key_name.  I have
 used both methods;  to choose between them you should consider what
 will make your most common use-cases most efficient  and lets you
 handle edge cases when needed.

   Hope that helps.

 Robert



 On Thu, Sep 2, 2010 at 03:39, ogterran jonathanh...@gmail.com wrote:
  Thanks Robert.
  The ancestor query works great. Read the documentation but i guess it
  didn't click
  I was looking for a children() like function in the parent.

  I don't think I can put it in the same search list.

  What if I add a field for type?

  class PageIndex(db.Model):
     type = db.StringProperty(required=True)
     searchlist= db.StringListProperty(required=True)

   type can be emails, ipaddresses, usernames
   searchlist can be whatever list.

   Is this better?

   Thanks
   Jon

  On Sep 1, 3:29 pm, Robert Kluin robert.kl...@gmail.com wrote:
  Hi Jon,
    1) When you build a query you can specify the ancestor.
         PageIndex.all(keys_only=True).ancestor(thepage)
       
  http://code.google.com/appengine/docs/python/datastore/queryclass.htm...

    2) I would not add multiple list properties to the same model.  I
  would also probably not make different kinds in this case.
  Personally, depending on exactly how you will need to query and
  maintain the data, I would either just put each field in the same
  search list or make a PageIndex entity for each type.

  Robert

  On Wed, Sep 1, 2010 at 02:39, ogterran jonathanh...@gmail.com wrote:
   Couple more questions
   1. If I have the parent entity, how do get all the child entities?
   2. If I have more fan out lists, so usernames is one, but now i have
   emails and ipaddresses
      is it more efficient to create different entity kinds or just add
   another list to PageIndex?
     i.e.
   class PageIndex(db.Model):
       usernames = db.StringListProperty(required=True)
       emails = db.StringListProperty(required=True)
       ipaddreses= db.StringListProperty(required=True)

   or

   class PageIndex(db.Model):
       usernames = db.StringListProperty(required=True)
   class PageEmailIndex(db.Model):
       emails = db.StringListProperty(required=True)
   class PageIpAddressIndex(db.Model):
       ipaddreses= db.StringListProperty(required=True)

   Thanks
   Jon

   On Aug 31, 11:19 pm, ogterran jonathanh...@gmail.com wrote:
   Thanks guys for all the responses.
   I checked out Brett's presentation and he talks about this exact issue
   on how to optimize using list properties

   So following the Brett's presentation, create 2 entitiy kinds.
   Page and PageIndex where Page is the parent of PageIndex (specify
   parent in PageIndex constructor)

   class Page(db.Model):
       pagekey= db.StringProperty(required=True)

   class PageIndex(db.Model):
       usernames = db.StringListProperty(required=True)

   indexes = db.GqlQuery(SELECT __key__ FROM MessageIndex 
                                      WHERE usernames = :1, username)
   keys = [k.parent() for k in indexes]
   pages = db.get(keys)

   Since we are querying by key, it is 10x faster, and no unnecessary
   serialization.
   We can fan out by adding multiple PageIndex, if reaches 5000 max.

   Is this about right?

   Thanks
   Jon

   On Aug 31, 9:34 am, Jeff Schwartz jefftschwa...@gmail.com wrote:

A list property's size is limited to 5000.

If you only want to know if a user has visited a page, you can use 
the first
model  query it returning only keys to avoid list serialization 
issues. In
addition, key only queries are very fast.

Additionally, if your Page model's key had a string name that was the
pagecode then you could even use the key to identify the page. In 
other
words, you'd be materializing the view in the key of the model. This 
would
eliminate the need to serialize the entity entirely when it is used 
for
lookup.

Writing out the entity after having updated its list

Re: [google-appengine] Re: Uploading 1100 files...

2010-09-06 Thread Jaroslav Záruba

Hi and thanks Lorenzo

On Mon, Sep 6, 2010 at 10:23 AM, l.denardo lorenzo.dena...@gmail.comwrote:

Hello,
these times are pretty usual for me (Italy) and seem to depend on the
number of files you need to compile and upload.

I just uploaded a test (nearly empty) app, no GWT, one servlet and one
page. That took about 30 seconds.

My business app has numbers like your. I work in Java.
The cloning application files usually gives 700-900 files cloned. Of
these, 100 to 300 get uploaded each time I deploy an update.

Usually, depending on my bandwidth, upload and precompilation can take
3 to 10 minutes. 3-5 more minutes usually go wasted in the will check
again in XX seconds loop.
So 9 to 15 minutes are usual times to deploy for me.

My bandwith is 50mbps, and it took me 10 mins only to _upload_ those 250-270
files, pre-compilation, cloning etc _not included_. (Judging by what the log
shows.)

Precompilation is a time-consuming step, which is explained here:

http://code.google.com/events/io/2010/sessions/whats-hot-in-java-for-app-engine.html
(last part of the session).
For what I understood, your files are divided in 4 bulks, which are
then compiled and then uploaded to GAE in compiled form (this is also
a good explanation of why no source is downloadable...no source is
uploaded actually, for what I understand).

If it takes 10 min to upload 270 small files then uploading probably does
way more then what it says. I can't imagine it takes 10 min to upload that
small amount of data. (Even if it was 1MB.)

Hope the session video helps.

I can't watch it right now, unfortunately GWT is currently not my job,
rather a hobby.
I will watch it later, thanks nevertheless.

Cheers
JZ

Regards
Lorenzo

On Sep 5, 9:16 am, Jaroslav Záruba jaroslav.zar...@gmail.com wrote:
Uploading my GWT-application to GAE takes eons lately. For instance, it
takes 9-10 minutes to upload 275 files.
Are those times something I should get used to or is GAE only
experiencing
some issues?

Judging by what Eclipse outputs when uploading only a few files (like
when I
only modify server-side stuff), it seems that each file takes separate
request to get uploaded. Is that right?

Regards
J. Záruba

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[google-appengine] Re: Web Service

2010-09-06 Thread SivaTumma

@Tsolmon Narantsogt,
If you are not satisfied with whatever the above posts said, consider
this.

A Web Service is any kind of a request - response cycle over the web.
Refer to this image...
 img src=http://chart.apis.google.com/chart?
cht=p3chd=s:Uf9achs=250x100chl=January|February|March|April/
This was a web service that just reads parameters from the url (refer
to the url of this image by going to its properties), and returns a
RAW image file as a response. Thats it.

In a natural sense, any http url is a web service. All the web servers
just hold a web service code that understands the url and give a
response.

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[google-appengine] Re: Web Service

2010-09-06 Thread SivaTumma

@Tsolmon Narantsogt,
If you are not satisfied with whatever the above posts said, consider
this.
A Web Service is any kind of a request - response cycle over the web.
Refer to this image...
 img src=http://chart.apis.google.com/chart?
cht=p3chd=s:Uf9achs=250x100chl=January|February|March|April/
This was a web service that just reads parameters from the url (refer
to the url of this image by going to its properties), and returns a
RAW image file as a response. Thats it.
In a natural sense, any http url is a web service. All the web
servers
just hold a web service code that understands the url and give a
response.

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[google-appengine] What is the most efficient way to do a large IN query in GQL?

2010-09-06 Thread johnterran

Hi

In BigTable, what is the most efficient way to do a large IN query?
My IN parameter list is typically 500 but can be 10k+
i.e.
class User(db.Model):
name = db.StringProperty(required = True)
id = db.StringProperty(required = True)

given a list of ids that can consist of 10k list, i need to retrieve
all the names
 users = db.GqlQuery(SELECT * FROM User where id IN :1,
ids)


what is the best way to do this?

Thanks
John

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[google-appengine] Slow Datastore queries

2010-09-06 Thread Flips

Hi,

I have a problem I cannot solve. To process tasks that are too
complicated for app engine I have a little stack implemented in
datastore. Tasks will be inserted in it and my dedicated servers are
periodically asking app engine for new tasks. It basicly works like
this: http://pastebin.com/NKt2z1PQ

The problem is that this query is getting really slow sometimes e.g.
http://i55.tinypic.com/25p643m.png

This slow query execution is not normal or is it?

Best Regards
Philip

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[google-appengine] Re: Web Service

2010-09-06 Thread SivaTumma

@Tsolmon Narantsogt,

To be more specific, I believe that a python's GAE hello world program
is itself a web service.
What to return as a response to a http request is upto you. Web
services can be just a calculator or a big heroic Code that returns
some great data after processing a great code in the server.

PS: Please correct me if you feel that I may be wrong in conception of
a Web Service.

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[google-appengine] Re: What is the most efficient way to do a large IN query in GQL?

2010-09-06 Thread Niklasro(.appspot)



On Sep 6, 8:51 am, johnterran johnter...@gmail.com wrote:
 Hi

 In BigTable, what is the most efficient way to do a large IN query?
 My IN parameter list is typically 500 but can be 10k+
 i.e.
 class User(db.Model):
     name = db.StringProperty(required = True)
     id = db.StringProperty(required = True)

 given a list of ids that can consist of 10k list, i need to retrieve
 all the names
  users = db.GqlQuery(SELECT * FROM User where id IN :1,
                             ids)

 what is the best way to do this?

 Thanks
 John
I propose parametrize pairs to a dictionary using Query and not GQL ie
User.All( ...+ logic
ie filter(url id, ['www.domain010703.com.','domain010703']) with IN
pairs listed as dictionary. I didn't program it but the data structure
seems adequate.
Thank you
Niklas R

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[google-appengine] Re: Development server hangs when blobstore streams video

2010-09-06 Thread Niklasro(.appspot)



On Sep 3, 1:58 pm, Harry glazed...@gmail.com wrote:
 Hi,

 I'm using an open source video player for playing uploaded video files
 (via Blobstore).
 If video file is small (less than a megabyte), it serves properly.
 But when the file is larger, it crashes the development server.
 Do I need to use the BlobStore reader to break up the file and serve
 it in segments? Or what else ?
 Has anyone managed to setup streaming videos using the blobstore?

 Thanks
I can upload and somewhat stream upto 50 mb video yes( Can you?).
Which format is best: mp4, flv, 3gp or other? Here's GAE serving mp4
direct output (no template) video byi
www.koolbusiness.com/serve/AMIfv965AEZaAqKhMrfPBo3ApE3es5abthDgYJEDdlL1iwL-XyptPaQVM4If19wuhPCh_2cbjDXFXuUTVudFwebAbN125RBXSqmMakIBU7ij2OSEZRNhYQ4M9DsWCUr9Lh9GR9prJnRmQXe6J93m2_zvwLZJMEHScKJl5gt-zbyXJSlvXCygMJ4

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[google-appengine] Re: Inheritance

2010-09-06 Thread Niklasro(.appspot)

On Sep 4, 6:26 pm, Robert Kluin robert.kl...@gmail.com wrote:
 What do you mean inheritance?  Your link is broke.

 Robert

 On Sat, Sep 4, 2010 at 12:06, lisandro lisandr...@gmail.com wrote:
  Hi!
  Someone has some code working correctly that uses inheritance?
  Example?
  Since
  in the link:

 http://code.google.com/intl/es/appengine/docs/java/datastore/relation...
  He does not say anything in the matter...

  Regards
  Lisandro
I inherit a custom request handler enabling i18n for instance to
activate, reset or delete the django language cookie. You can call it
BaseHandler or i18NHandler available by i18nhandler.googlecode.com
Sincerely
Niklas

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Re: [google-appengine] App Engine for Busisness

2010-09-06 Thread Nick Johnson (Google)

Hi Ben,

On Fri, Sep 3, 2010 at 10:12 AM, Ben Chung oom...@gmail.com wrote:

Hi, App Engine Team:

Our RD developers, We are very interested in App Engine for Business.

Because we are assessing to migrate our platform to GAE platform, so
there are some questions for you, hope you can help us to answer them.

1) We know there are many 1MB limitation, like datastore for each
entity, image resize, mail attachment, URL fetch, memcache value.

Does App Engine for Business support to revoke these limitations by
paying more costs?

We're working to increase all these limits, but when we do, it's likely to
be across the board, not just for Business customers.

2) Does App Engine for Business support many applications to access
ONE datastore(DB)?

No. If you can explain why you need to do this, we can probably suggest a
better alternative, though.

3) Does App Engine for Business support request handler for more
than 30 seconds?

This is another limitation we're working on. Please contact me off-list if
you're interested in learning more.

4) Does App Engine for Business support socket to use?

No, all outgoing requests must be via one of our APIs, such as URLFetch.

-Nick Johnson

Thanks in advance.

BR,

Ben

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[google-appengine] Can't deploy a localized application due to 3000 files limit

2010-09-06 Thread burnayev

I've just tried to deploy an application of mine translated into just
4 languages and went over the 3000 files limit.

Most of the files are the permutations generated by GWT compiler so
jarring the Java class files won't help much.

Zipping the static files is a hassle and will likely hurt the
performance badly.

Is there a natural solution to this?

Kind regards,
Borys Burnayev
actioncomplete.com
GTD for Android and Web

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[google-appengine] Re: image retrieval from datastore in form of thumbnail

2010-09-06 Thread Niklasro

On Sep 3, 7:02 am, mugdha mnimka...@gmail.com wrote:
 How to retrieve image from datastore so we can create thumbnail  of
 that image?
It works here get_serving_url and just append number to wanted size eg
http://lh4.ggpht.com/jQaoYIcjfo29WZH3O0SVu23IomfoCIW8sHXOaJMqYdzh3ltSFuf52wGQyWi9W0nGOmdPWeOy_SQqvvZgeqzH4YbS8vCePA=s120
and
http://lh4.ggpht.com/jQaoYIcjfo29WZH3O0SVu23IomfoCIW8sHXOaJMqYdzh3ltSFuf52wGQyWi9W0nGOmdPWeOy_SQqvvZgeqzH4YbS8vCePA
where in this case =120 makes the thumbnail via get_serving_url
Hope this clarifies
Niklas R

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[google-appengine] Re: get_serving_url and DDOS attacks

2010-09-06 Thread Niklasro

On Sep 5, 8:47 am, Flips p...@script-network.com wrote:
 Hi,

 I am actually planning a new project that will heavily use the high-
 performance image serving. I actually have doubts that it is ready for
 productive usage, because we don't have any logs about it and its
 requests probably won't be reflected on the app engine dashboard. How
 are we supposed to detect DDOS attacks on image urls? Or what could we
 do if a top 500 website displays our image by using the image url on
 its site and consumes our traffic budget within minutes?

 Best Regards
 Philip
You can simulate an attack to see whether get_serving_url handles and
balances it.
Cheers
Niklas

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[google-appengine] Re: Using OR statement in datastore

2010-09-06 Thread Niklasro

On Sep 6, 3:53 am, killer barney ajcha...@gmail.com wrote:
 I'm a dunce. how does query filters help in the OR process?

 So do I do a query with contains dog and cat?

 On Sep 5, 8:44 pm, Nate Bauernfeind nate.bauernfe...@gmail.com
 wrote:

 http://code.google.com/appengine/docs/java/datastore/queriesandindexe...

  See Query Filters. Should answer your how-to question.

  In the backend it actually does two separate queries, but in parallel (then
  does any merging/union-ing based on your entire query after retrieving the
  results). There are some google tech talks on how the datastore works which
  should give you a really good idea why it is done this way.

  On Sun, Sep 5, 2010 at 10:34 PM, killer barney ajcha...@gmail.com wrote:
   This is something I never figured out how to do.  How do you
   supplement an OR statement in datastore?

   So let's say I have a user who sells Dogs and Cats.  How do I get a
   list of all of the dogs and cats that a user sells? I thought of 2
   ways, query both tables and combine the results in the backend or
   create an additional generic table Animals that tabulates all of the
   selling action into a list and search the Animals entries for that
   user.

   I created this scenario just so you can have an idea of what I am
   looking for, but in reality, my cats table may consist of hundreds
   of users.  I'm not sure if creating a combined list property of Dog
   and Cat users is the way to go.  And doing two queries just doesn't
   seem right either.  Is there a better way to do this?
A replacement in many cases is the IN operator. Did you try it?
Regards
Niklas

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[google-appengine] Re: Removing and installing GAE SDK for python

2010-09-06 Thread lenic

Thanks for you answer Tim,
I did upload some applications with python 2.6 but I had to move the
dev_appserver.py file into my project directory but  it worked. Then I
got this idea to remove everything and start all over with python 2.5
and now I can not se my old applications in the launcher.

So now I can create an application in the launcher but I can not
browse or stop the application and I get this error;

Traceback (most recent call last):
  File launcher\mainframe.pyc, line 336, in OnEdit
  File launcher\taskcontroller.pyc, line 257, in Edit
  File subprocess.pyc, line 594, in __init__
  File subprocess.pyc, line 816, in _execute_child
WindowsError: [Error 5] Åtkomst nekad
WARNING:root:Already running a task for D:\GAE\helloworld\txtlena2!
ERROR:root:
Cannot run project D:\GAE\helloworld\txtlena2.  Please confirm these
values in your Preferences, or take an appropriate measure to fix it
(e.g. install Python).

Do you now what I schould do, did I miss something?

/Lenic



On 3 Sep, 02:16, Tim Hoffman zutes...@gmail.com wrote:
 Hi

 I Can't help with this specific error, but

 for starters being newbie, under no circumstances use python 2.6.

 You should only use 2.5.x

 T

 On Sep 2, 3:17 pm, lenic desireel.lars...@gmail.com wrote:



  Hi, I am a newbee and I am in a real mess...:(
  I had installed
  GAE SDK in july (it was the latest version then)
  Python 2.6
  and it worked fine and I could develop appspot application.
  Then I removed GAE SDK yesterday and installed it again,..
  Now I can´t open the launcher and get this message in the log file.
  (Without open the launcher).
  Does anyone have a tip?
  Thanks/Lenic

  Traceback (most recent call last):
    File GoogleAppEngineLauncher.py, line 42, in module
    File wx\_core.pyc, line 7913, in __init__
    File wx\_core.pyc, line 7487, in _BootstrapApp
    File launcher\app.pyc, line 53, in OnInit
    File launcher\app.pyc, line 97, in _CreateModels
    File launcher\maintable.pyc, line 35, in __init__
    File launcher\maintable.pyc, line 86, in _LoadProjects
    File launcher\project.pyc, line 63, in ProjectWithConfigParser
    File launcher\project.pyc, line 260, in _LoadFromConfigParser
    File ConfigParser.pyc, line 520, in get
  ConfigParser.NoOptionError: No option 'name' in section: '9'

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Re: [google-appengine] App Engine for Busisness

2010-09-06 Thread Jeff Schwartz

Hi Nick. I am very encourage by your responses to Ben, specifically
regarding increasing all these limits across the board and not just for
business customers. Can you say when Google will announce their intentions
regarding the specifics of these pending changes? It would be very
beneficial to know these prior to their availability so as to better factor
their benefits into our designs now.

Jeff

On Mon, Sep 6, 2010 at 8:30 AM, Nick Johnson (Google)
nick.john...@google.com wrote: