from:"Fabrizio"

[google-appengine] How to get the date when an entity was persisted

2013-05-01 Thread Fabrizio Guespe

Hello! I want to sort a celltable by the last ones added on top, now , to 
do this, i need to sort them by the date they were added to the 
application. Is there a way to get this date? or i have to create a new 
attribute for each class?. Thanks!

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Re: [appengine-java] GAE Authentication Broken

2011-04-25 Thread Fabrizio Accatino

Not sure... but since you are connecting through https,  try to get the
SACSID cookie instead of the ACSID.

   fabrizio


On Sun, Apr 24, 2011 at 11:04 PM, Konstantin Weitz 
konstantin.we...@googlemail.com wrote:

 Hi guys,

 I'm trying to authenticate at a web service, running on gae, with android
 as described here

 http://blog.notdot.net/2010/05/Authenticating-against-App-Engine-from-an-Android-app

 For that reason I first get the token from the phone with the following
 code

 accountManager.getAuthToken(account, ah, false, new
 GetAuthTokenCallback(), null);
 // ...
 String auth_token = bundle.getString(AccountManager.KEY_AUTHTOKEN);

 and i then request the following url in order to get the real
 authentication token

 https://+DOMAIN+/_ah/login?continue=http://localhost/auth=; +
 auth_token

 and i get the following error message (the code used to work just recently)

 The server encountered an error and could not complete your request.
 If the problem persists, please A HREF=
 http://code.google.com/appengine/community.html;report/A
 your problem and mention this error message and the query that caused
 it./h2

 What is the problem? Did the api change?

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Re: [appengine-java] GAE Authentication Broken

2011-04-25 Thread Fabrizio Accatino

In your first piece of code you used https.  So you need to get the secure
auth cookie from app engine (SACSID).  IMHO

My codes. It manages both cookies.
http://fhtino.blogspot.com/2011/02/connet-android-app-to-google-app-engine.html


   fabrizio



On Mon, Apr 25, 2011 at 12:22 PM, Konstantin Weitz 
konstantin.we...@googlemail.com wrote:

 I think my authentication token may just have expired.

 http://stackoverflow.com/questions/1996686/authtoken-from-accountmanager-in-android-client-no-longer-working

 I didn't check yet but the symptoms seem to match.
 It sure would be nice if the error message I get from the server would be
 more helpful.




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Re: [appengine-java] Re: Failing tasks getting duplicated

2011-04-17 Thread Fabrizio Accatino

*If a task fails to execute* (by returning any HTTP status code outside of
the range *200-299*), App Engine retries *until it succeeds*.
http://code.google.com/appengine/docs/java/taskqueue/overview.html#Task_Execution

So, if you need to run you tasks once, ensure you will return always http
200. The simpler way: put a try-catch in your servlet entry point and catch
all exceptions. A quite brutal but it works.

   fabrizio


On Sun, Apr 17, 2011 at 8:34 AM, nischalshetty nischalshett...@gmail.comwrote:

 Pretty weird. Let's hope someone from the GAE team peeps into this thread.
 I have thousands of tasks being generated every minute and there are errors
 when they are executed. I'm hoping they don't get duplicated. There's no
 way for me to know so if what you say is true then it's trouble for a lot of
 us.

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Re: [appengine-java] Federated ID versus User ID

2011-04-14 Thread Fabrizio Accatino

Peter,

I use it as the primary key of my entity. No problem.

   fabrizio

PS: please, do not double post on the mailing list.


On Thu, Apr 14, 2011 at 2:09 AM, Peter ptr...@gmail.com wrote:

 Fabrizio,

 Thank you for your help.

 Once I get the user id, do I still need to run it through createKey or can
 I directly use the ID as the primary key?

 User user = userservice.getCurrentUser();
 String id = user.getUserId();
 Key userIdKey = KeyFactory.createKey(Users, id);
 Entity eUser = new Entity(Users, userIdKey);

 Appreciate your help.

 Regards,
 Peter


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Re: [appengine-java] User service - getCurrentUser always returns null

2011-04-12 Thread Fabrizio Accatino

Have you activated Security  Authentication in the web.xml?

http://code.google.com/appengine/docs/java/config/webxml.html#Security_and_Authentication


http://code.google.com/appengine/docs/java/config/webxml.html#Security_and_Authentication
  fabrizio

On Wed, Apr 13, 2011 at 7:44 AM, Peter ptr...@gmail.com wrote:

 Folks,

 I am a bit confused on how to use user services correctly.

 Here is the relevant code snippet:

 public class GreetingServiceImple extends RemoteServiceServlet implements
 GreetingService {

public string greetServer() {
 UserService us = UserServiceFactory.getUserService();
 User user = us.getCurrentUser();
 ...
}
 }

 The problem is, the value returned by getCurrentUser is always null,
 irrespective of whether I deploy locally or at appspot.

 I am using Firefox as the client. I have two tabs open. On one tab, I am
 signed into Google mail using my gmail account. On the other tab, I am
 trying to run the app that I am working on.

 What is it that I am missing?

 Thank you in advance for your help.

 Regards,
 Peter

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Re: [appengine-java] Federated ID versus User ID

2011-04-12 Thread Fabrizio Accatino

getUserID


I see that User class has two methods to obtain id information,
 getFederatedIdentity() and getUserId(). Which of these two can be used as
 the primary key for storing per-user information.


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Re: [appengine-java] only allowing local connections to dev server?

2011-04-11 Thread Fabrizio Accatino

Perhaps a better solution:
use the --address paramater
http://code.google.com/appengine/docs/java/tools/devserver.html#Command_Line_Arguments
http://code.google.com/appengine/docs/java/tools/devserver.html#Command_Line_Arguments
  fabrizio

On Mon, Apr 11, 2011 at 7:56 AM, Fabrizio Accatino fht...@gmail.com wrote:

 I use rinetd. It's a port forwarder.
 http://www.boutell.com/rinetd/

 fabrizio (from android)
 Il giorno 10/apr/2011 19.57, Luis Montes monte...@gmail.com ha
 scritto:

  When running a java webapp in eclipse it seems that I can only connect to
  the dev jetty instance from the localhost. Is jetty fired up only bound
 to
  127.0.0.1?
 


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Re: [appengine-java] only allowing local connections to dev server?

2011-04-10 Thread Fabrizio Accatino

I use rinetd. It's a port forwarder.
http://www.boutell.com/rinetd/

fabrizio (from android)
Il giorno 10/apr/2011 19.57, Luis Montes monte...@gmail.com ha scritto:
 When running a java webapp in eclipse it seems that I can only connect to
 the dev jetty instance from the localhost. Is jetty fired up only bound to
 127.0.0.1?

 I have some mobile wifi devices (android, ipad, etc.) that I'd like to
test
 with on the LAN but it seems that I'm going to have do some tunneling or
 proxying to get things to work.

 I can't find a way to configure networking in the sdk. Is
 127.0.0.1:hardcoded somewhere?


 Luis

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Re: [appengine-java] urlfetcher bug, weird content retrieved.

2011-02-12 Thread Fabrizio Accatino

Afaik UrlFetch uses an internal cache.

Note the two different heders in you logs:
  x-google-cache-control=[remote-cache-hit]
  x-google-cache-control=[remote-fetch]

To force a fresh urlfetch everytime, add these headers in you request.

connection.addRequestProperty(Cache-Control, no-cache,max-age=0);
connection.addRequestProperty(Pragma, no-cache);


   Fabrizio


On Sat, Feb 12, 2011 at 12:08 PM, aka1g van...@gmail.com wrote:

 Hi!
 I'm fetching webpages and parse them. I have a weird behavior that
 looks like GAE bug.
 One of the pages retrieved has a totally different content.
 I'm getting
 http://www.gamer-district.com/modules/mod_realmcore/mod_realmcore.php
 page, and most of the time it is retrieved incorrectly.
 It can be that some stale/cathed version is returned.
 I am logging http headers and page content.This only happens for this
 particular url.


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Re: [appengine-java] Re: Problem Authenticating against App Engine

2011-02-06 Thread Fabrizio Accatino

The Nick's way is the good way.

My note was about OAuth. Afaik Android AccountManager class uses
ClientLogin for authentication on App Engine.

Fabrizio


On Sun, Feb 6, 2011 at 5:03 PM, Sky skysoftwaredes...@googlemail.comwrote:

 thanks for the answer. I will try it, as soon as my new mobile sim
 card has been activated ;). In the 2.3 emulator it worked with another
 account...

 ClientLogin: I did not find any sample code. The best documented way I
 found was Nick's blog. Maybe Google should provide some Tutorials/libs
 with sample code, that demonstrates the perfect way to authenticate
 an Android app with app engine using Google accounts...



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Re: [appengine-java] Re: Problem Authenticating against App Engine

2011-02-06 Thread Fabrizio Accatino

I follow another way:
 1 - get auth token from AccountManager
 2 - try to get the auth Cookie from AppEngine
 3 - if step 2 fails, I invalidate the Auth token and restart from step 1.

My very alpha code is here:
http://fhtino.blogspot.com/2011/02/connet-android-app-to-google-app-engine.html


   Fabrizio


On Sun, Feb 6, 2011 at 8:12 PM, Sky skysoftwaredes...@googlemail.comwrote:

 One more question concerning the invalidation of the AuthToken. I read
 that it invalidates after 24h. What is when the Activity, holding the
 AuthToken (in NicksBlog the AppInfo class), ends (with finish() and
 onDestroy) and started again? In my opinion a new valid AuthToken is
 fetched every time the Appinfo class gets started.
 In this case, why do I have to invalidate the old AuthToken?



 On 6 Feb., 19:46, Sky skysoftwaredes...@googlemail.com wrote:
  thanks for the clarification!
 
  On 6 Feb., 17:16, Fabrizio Accatino fht...@gmail.com wrote:
 
   The Nick's way is the good way.
 
   My note was about OAuth. Afaik Android AccountManager class uses
   ClientLogin for authentication on App Engine.
 
   Fabrizio
 
   On Sun, Feb 6, 2011 at 5:03 PM, Sky skysoftwaredes...@googlemail.com
 wrote:
 
thanks for the answer. I will try it, as soon as my new mobile sim
card has been activated ;). In the 2.3 emulator it worked with
 another
account...
 
ClientLogin: I did not find any sample code. The best documented way
 I
found was Nick's blog. Maybe Google should provide some
 Tutorials/libs
with sample code, that demonstrates the perfect way to authenticate
an Android app with app engine using Google accounts...
 
 

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Re: [appengine-java] Problem Authenticating against App Engine

2011-02-05 Thread Fabrizio Accatino

Perhaps your authentication token was expired.

In the android app, call .invalidateAuthToken(account.type, authToken)
on AccountManager class.
This releases the current authentication token. Then call again getAuthToken
to obtain a new and fresh authentication token.

A note: AFAIK Android uses ClientLogin and not OAuth.
http://code.google.com/apis/accounts/docs/AuthForInstalledApps.html

Fabrizio

On Fri, Feb 4, 2011 at 11:57 PM, Sky skysoftwaredes...@googlemail.comwrote:

Hi all,

I am using the oauth authentication process to authenticate Android to
App Engine described in Nick's blog:

http://blog.notdot.net/2010/05/Authenticating-against-App-Engine-from-an-Android-app

This worked fine until today. Today the authentication on app engine
fails - boolean authenticated = userServiceManager.isUserLoggedIn();
returns always false.

Is anyone out there using the same authentication process and has the
same problem?
Are there any changes concerning the URL the cookie is fetched?
HttpGet http_get = new HttpGet(https://yourapp.appspot.com/_ah/login?
continue=http://localhost/auth=https://yourapp.appspot.com/_ah/login?continue=http://localhost/auth=
+ tokens[0]);

thanks!

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Re: [appengine-java] Re: UrlFecth: random java.io.IOException: Could not fetch URL: http://...myurl...

2011-02-03 Thread Fabrizio Accatino

Didier,

thank you for your feedback but I think the error is not related with
maximum size. Infact the content is not big and I don't get a
ResponseTooLargeExpetion.
http://code.google.com/appengine/docs/java/javadoc/com/google/appengine/api/urlfetch/ResponseTooLargeException.html

Fabrizio

On Thu, Feb 3, 2011 at 8:31 AM, Didier Durand durand.did...@gmail.comwrote:

Hi,

1 possibility that I see: you fetch a page with a variable length (i.e
dynamically generated over time: RSS stream, twitter feed, etc...) and
sometimes the length is over the URL fetch service limit - exception

See text at end of
http://code.google.com/appengine/docs/java/urlfetch/overview.html#Responses

regards

didier

On Feb 3, 8:23 am, Fabrizio Accatino fht...@gmail.com wrote:
I have a recurring task that get content from various urls on different
hosts.
On some urls I get random IOException:
java.io.IOException: Could not fetch URL:http://...myurl...

On one url the failure rate is about 1 / 10. But it's not regular.
On another url the rate is lower: 1/100.
Other urls work without errors.

The errors are not timeout-related. When UrlFetch encounters a timeout it
throws an exception with a different message:
java.io.IOException: Timeout while fetching:http://...myurl...

Suggestions?

Fabrizio

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[appengine-java] Feature request: UrlFetch java : differenciate IOException causes

2011-02-03 Thread Fabrizio Accatino

http://code.google.com/p/googleappengine/issues/detail?id=4502

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Re: [appengine-java] Google Voice + App Engine (Java)

2011-02-02 Thread Fabrizio Accatino

I think your lib uses not whitelisted java API or blocked java API
   java.security.AccessControlException: access denied
(java.lang.RuntimePermission
setFactory)


Following your stacktrace the problem comes from
java.net.HttpURLConnection.setFollowRedirect
The method is called by
com.techventus.server.voice.Voice.get(Voice.java:1144)
I searched using Google... is this your lib?
http://code.google.com/p/google-voice-java  ?

If yes, download the latest source code and compile it. The latest version
of Voice.java does not contain the call to
java.net.HttpURLConnection.setFollowRedirect.
It was replaced some revisions ago.
http://code.google.com/p/google-voice-java/source/diff?spec=svn137old=115r=135format=sidepath=/trunk/src/com/techventus/server/voice/Voice.java
http://code.google.com/p/google-voice-java/source/browse/trunk/src/com/techventus/server/voice/Voice.java

The jar in the download area was not updated. So you need to download the
source code and compile it by yourself.


   Fabrizio




On Wed, Feb 2, 2011 at 5:34 PM, lovegoogle sinusek...@gmail.com wrote:

 Hello All,

 I tried using google voice within App Engine and it fails to execute
 because of the custom Security Manager that App Engine uses.
 From the stack trace, it looks like it is failing during the Http
 Connection it needs to make to send SMS.
 My goal is to use SMS feature within my application.

 I tried running the same code outside of App Engine runtime, using
 just my JDK as a console app and it works fine.
 The restriction is imposed by App Engine.

 Is there any way to get around it or Google Voice is a no no within
 App Engine.
 I would assume that Google Voice is a trusted code since its part of
 google APIs.

 Any pointers will really help me...Thanks.

 Sinu

 Here is the code
 -
try
{
log.info(going to log in);
Voice voice = new Voice(email, password);
log.info(logged in);
voice.sendSMS(phonenum, message);
log.info(sms sent);
return true;
}
catch(Exception e)
{
e.printStackTrace();
return false;
}
 -


 Here is the stack trace..

 -
 going to log in
 https://www.google.com/accounts/ClientLogin - OK
 Logged in to Google - Auth token received
 java.security.AccessControlException: access denied
 (java.lang.RuntimePermission setFactory)
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.checkSetFactory(SecurityManager.java:
 1612)
at
 java.net.HttpURLConnection.setFollowRedirects(HttpURLConnection.java:
 249)
at com.techventus.server.voice.Voice.get(Voice.java:1144)
at com.techventus.server.voice.Voice.getGeneral(Voice.java:361)
at com.techventus.server.voice.Voice.init(Voice.java:262)
at com.techventus.server.voice.Voice.init(Voice.java:211)
at
 com.sinusekhar.cloudapps.zumba.dao.MobileDAO.sendSMS(MobileDAO.java:
 15)
at org.apache.jsp.zumba.jsp.play_jsp._jspService(play_jsp.java:64)
at
 org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at
 org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:
 377)
at
 org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:
 313)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
at
 com.google.appengine.tools.development.PrivilegedJspServlet.access
 $101(PrivilegedJspServlet.java:23)
at com.google.appengine.tools.development.PrivilegedJspServlet
 $2.run(PrivilegedJspServlet.java:59)
at java.security.AccessController.doPrivileged(Native Method)
at

 com.google.appengine.tools.development.PrivilegedJspServlet.service(PrivilegedJspServlet.java:
 57)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at
 org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
 511)
at org.mortbay.jetty.servlet.ServletHandler
 $CachedChain.doFilter(ServletHandler.java:1166)
at

 com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:
 58

[appengine-java] UrlFecth: random java.io.IOException: Could not fetch URL: http://...myurl...

2011-02-02 Thread Fabrizio Accatino

I have a recurring task that get content from various urls on different
hosts.
On some urls I get random IOException:
  java.io.IOException: Could not fetch URL: http://...myurl...

On one url the failure rate is about 1 / 10.  But it's not regular.
On another url the rate is lower:  1/100.
Other urls work without errors.


The errors are not timeout-related. When UrlFetch encounters a timeout it
throws an exception with a different message:
  java.io.IOException: Timeout while fetching: http://...myurl...


Suggestions?


Fabrizio

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Re: [appengine-java] How to prevent google bot

2011-02-01 Thread Fabrizio Accatino

robot.txt ?


On Tue, Feb 1, 2011 at 2:16 PM, midi chum...@gmail.com wrote:

 How can I prevent google bot from accessing a java based appspot
 app ?.


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Re: [appengine-java] Re: Get execution duration of an asynchronous urlfetch

2011-01-30 Thread Fabrizio Accatino

Didier,

your idea is good but can/want execute activity on a task. I need simple
approach: run X async urlfetch, wait for end of execution and store
execution time of each fetch.

I've opened a feature request on the issue tracker:
http://code.google.com/p/googleappengine/issues/detail?id=4476

Fabrizio

On Sun, Jan 30, 2011 at 8:28 AM, Didier Durand durand.did...@gmail.comwrote:

Hi,

You're right: async url fetch doesn't seem to provide any way to
measure fetch time.

Then, I have a proposal: why don't you schedule a task per fetch, this
task will then do a regular synchronous url fetch for which measuring
will be easy.

So, your original servlet / task will schedule as many tasks as you
have fetches and wait via a loop of Thread.sleep() until all fetches
are done and their results (incl fetch time) written somewhere
(datastore / memcache) that the original servlet / task can access to
complete the work.

The only question though: can the application afford to launch those
tasks as they will incurr some overhead : some tenths of milliseconds
of cpu to schedule a task and run it + cpu time to write result to
cacche or ds in order to be shareable with originator.

If not acceptable, I hope it will at least give you some other ideas
to follow

regards

didier

On Jan 29, 9:50 am, Fabrizio Accatino fht...@gmail.com wrote:
Hello,

I'm playing with async urlfetch. My ispiration was Ikai athttp://
ikaisays.com/2010/06/29/using-asynchronous-urlfetch-on-java-ap...

I run some request in parallel. All works fine. But now I'd like to get
info
about execution time of each request. The target URLs I call are
different
so the response time are very different.
I read the documentation but HTTPResponse does not expose a execution
duration or similar value.

Any idea?

Fabrizio

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[appengine-java] Get execution duration of an asynchronous urlfetch

2011-01-29 Thread Fabrizio Accatino

Hello,

I'm playing with async urlfetch. My ispiration was Ikai at
http://ikaisays.com/2010/06/29/using-asynchronous-urlfetch-on-java-app-engine/

I run some request in parallel. All works fine. But now I'd like to get info
about execution time of each request. The target URLs I call are different
so the response time are very different.
I read the documentation but HTTPResponse does not expose a execution
duration or similar value.

Any idea?


Fabrizio

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[appengine-java] Unindexed properties with JDO ?

2011-01-27 Thread Fabrizio Accatino

Using the datastore low-level API I can set a property to no indexed.
 Entity.setUnindexedProperty();
http://code.google.com/appengine/docs/java/datastore/queries.html

Is there a way to get the same behaviour using JDO?
I'd like to reduce the space used by indexes automatically created on the
properties.

Fabrizio

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Re: [appengine-java] Task Queue API Update

2011-01-23 Thread Fabrizio Accatino

Method names changed  :)

.url(...) -- withUrl(...)
.method(...) -- withMethod(...)


http://code.google.com/appengine/docs/java/javadoc/com/google/appengine/api/taskqueue/TaskOptions.Builder.html


Fabrizio

http://code.google.com/appengine/docs/java/javadoc/com/google/appengine/api/taskqueue/TaskOptions.Builder.html

On Sun, Jan 23, 2011 at 7:14 PM, Doug doug...@gmail.com wrote:

 Good Afternoon All,

  I am working to convert from the Task Queue Labs API to the non-labs API
 version.  I am finding it slightly more difficult than I initially
 anticipated.  It appears that how I was adding tasks to the queue is not
 compatible with the non-labs API.  If I just update the imports to bring
 in the new API I get the error “The method url(String) is undefined for the
 type TaskOptions.Builder”.  I  have provide some example of my code below,
 if anyone else has converted can you give me some guidance on what I am
 doing wrong?



 Current code, using the Labs API:
 *import* *com.google.appengine.api.labs.taskqueue.Queue*;
 *import* *com.google.appengine.api.labs.taskqueue.QueueFactory*;
 *import* *com.google.appengine.api.labs.taskqueue.TaskOptions*;
 *import* *com.google.appengine.api.labs.taskqueue.TaskOptions.Method*;
 *import* *com.google.appengine.api.labs.taskqueue.TaskOptions.Builder*.*;

 …

 Queue add_queue = QueueFactory.getQueue(add);
 …

 for (int i = 1; i  Item_counter; i++) {


 add_queue.add(TaskOptions.Builder.url(/add?item=+ItemURL[i]).method(Method.GET));
 }



 Code using the non-Labs API

 import com.google.appengine.api.taskqueue.Queue;
 import com.google.appengine.api.taskqueue.QueueFactory;
 import com.google.appengine.api.taskqueue.TaskOptions;
 import com.google.appengine.api.taskqueue.TaskOptions.Method;
 import static com.google.appengine.api.taskqueue.TaskOptions.Builder.*;



 TaskOptions TOdefault =
 com.google.appengine.api.taskqueue.TaskOptions.Builder.withDefaults();

 …

 for (int i = 1; i  Item_counter; i++) {

 TaskOptions TO = new TaskOptions(TOdefault);
 TO.url(/add);
 TO.param(item, itemURL[i]);
 TO.method(Method.GET);
 add_queue.add(TO);
 }


 The new code compiles and will “run”, but I get all kinds of null pointer
 exceptions from the tasks when they try to run.  If I switch back to the
 labs API it works perfectly.  Can anyone help me understand what I need to
 do to either get my original code to work with the new API and/or what I did
 incorrectly with the updated code?


 Thanks,
 Doug

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Re: [google-appengine] Re: How to launch 100K+ recurring task every 5 min

2011-01-15 Thread Fabrizio Accatino

Daniel,

since a couple of days I'm playing with TaskQueue + countdown. I'm trying to
create a HttpMonitor, exactly as you.  :)
The idea is the same as Eli Jones wrote: enque a task with a deferred run
using countdown. My tests show it works fine.

OK, ok, my test are not for business. I'm learning and testing GAE, in
particular Task Queue.
I hope to have an alpha version in the next days. Let me know if you need
more info.


Fabrizio


On Sat, Jan 15, 2011 at 5:03 PM, supercobra superco...@gmail.com wrote:

 The countdown parameter of TaskQueue is indeed a big help here. Thanks
 for pointing that out.

 -- superco...@gmail.com
 http://supercobrablogger.blogspot.com/




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Re: [google-appengine] android application communicating with google app engine

2011-01-14 Thread Fabrizio Accatino

Discussed a couple of days ago on GAE Java group.

   fabrizio


On Fri, Jan 14, 2011 at 7:28 AM, Joseph Fonseka rukshan...@gmail.comwrote:

 I am looking to extend my android application to sync data back to a server
 and also display that information on a web application is google app engine
 the best choice for this job?

 What is the best way for my android application to communicate or push data
 down to google app engine? Is there a tutorial or article someone can point
 me to?


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Re: [google-appengine] CSS

2011-01-13 Thread Fabrizio Accatino

Check if you browser downloads the css or gets a 404. If downloads corretly,
inspect the content.
Use Fiddler or FireBug. Or activate Resource Tracking in chrome.

http://www.fiddler2.com/fiddler2/
http://www.fiddler2.com/fiddler2/http://getfirebug.com/

http://getfirebug.com/ Fabrizio

On Thu, Jan 13, 2011 at 12:02 PM, Massimiliano
massimiliano.pietr...@gmail.com wrote:

Yes, I have waited more of 24h. I'm dealing whit this from Sunday.
I can't understand why with the same browser on the same pc, offline it
works, online it doesn't.

2011/1/13 Wim den Ouden wdenou...@gmail.com

Did you wait for a moment and try it again?
static files are stored on a server near you, app files on the appengine
server
gr
wim

2011/1/13 Massimiliano massimiliano.pietr...@gmail.com:
Dear all,
I'm building a web site and I'm working with the float tag on my CSS.
The website is working well offline, but when I deploy it on the
appegine
all the box are in one column in the right (instead of some blocks
floating
on the left and some others on the right).
Is something I need to know in using CSS for appengine? I can't find
documentation about this.
Regards
Max
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Wim den Ouden
Custom applications, https://e-comm.appspot.com/
Free open source E-commerce framework (web) apps,
http://code.google.com/p/relat/
Gae developer tips, http://code.google.com/p/relat/wiki/gaetips

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Re: [google-appengine] CSS

2011-01-13 Thread Fabrizio Accatino

Your issue is not a GAE issue. The CSS is the same.

Check your HTML. It's invalid. Look at the end of lorem ipsum block and
the adv java-script block.

Fabrizio

On Thu, Jan 13, 2011 at 11:37 PM, Massimiliano
massimiliano.pietr...@gmail.com wrote:

Yes, to all! (and thanks to all!)

This is the link: http://albafenicesite.appspot.com/

http://albafenicesite.appspot.com/Attached the css!

Massimiliano

2011/1/13 Fabian Kuran ivirusbr...@gmail.com

Did you already tried to clean your browser cache and try it again?

kind regards
fabi

2011/1/13 Massimiliano massimiliano.pietr...@gmail.com:
Yes, I have waited more of 24h. I'm dealing whit this from Sunday.
I can't understand why with the same browser on the same pc, offline it
works, online it doesn't.

2011/1/13 Wim den Ouden wdenou...@gmail.com

Did you wait for a moment and try it again?
static files are stored on a server near you, app files on the
appengine
server
gr
wim

My email: massimiliano.pietr...@gmail.com
My Google Wave: massimiliano.pietr...@googlewave.com

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Mit freundlichen Grüßen
Fabian Kuran

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Re: [appengine-java] Re: Task queue + datastore transaction + jdo: is it possible?

2011-01-12 Thread Fabrizio Accatino

Thank you very much. It works fine.  :)

Only a note. In my tests I didn't pass the transaction when I call the
queue.add. It seems that queue.add feels the current transaction (see the
example at
http://code.google.com/appengine/docs/java/taskqueue/overview.html#Tasks_Within_Transactions
)

My code:

PersistenceManager pm = PMF.get().getPersistenceManager();
try {
pm.currentTransaction().begin();

// JDO
Query jdoquery = pm.newQuery(Friend.class);
 get object x
x.setLastUpdate(new Date());
pm.makePersistent(x);

// Queue
Queue queue = QueueFactory.getQueue(myqueue);

queue.add(taskOpts);

pm.currentTransaction().commit();
} finally {
if (pm.currentTransaction().isActive())
pm.currentTransaction().rollback();
pm.close();
}



   Fabrizio



On Tue, Jan 11, 2011 at 9:29 PM, Ed Murphy emur...@yahoo.com wrote:

 Yes, I do this with JDO.  Just add to you queue within the current
 transaction, for instance;

 PersistenceManager pm = PMF.get().getPersistenceManager();
 try
 {
//
// start transaction so we can atomically check the secondary key
//
pm.currentTransaction().begin();

//
// enqueue a task to process this ImportTask
//
//
String theUrl = /tasks; // whatever your url will be - this is is
 your state;
Queue queue = QueueFactory.getDefaultQueue();
queue.add(

 DatastoreServiceFactory.getDatastoreService().getCurrentTransaction(),
TaskOptions.Builder.url(theUrl));

//
// commit the transaction.
//
pm.currentTransaction().commit();   // we finished, so commit
 the
 transaction.
 }
 catch(DataAccessException dae)
 {
throw dae;  // let prior DataAccessException leave.
 }
 catch(Exception e)
 {
throw new DataAccessException(e);   // wrap the exception in our
 runtime exception.
 }
 finally
 {
//
// if the transactions is still active, then there
// was an exception thrown.  So we rollback the transaction.
//
if(pm.currentTransaction().isActive())
{
pm.currentTransaction().rollback();
}

//
// we always close the PersistenceManager when done.
//
if(!pm.isClosed())
{
pm.close();
 }
 }


 On Jan 11, 10:45 am, Fabrizio Accatino fht...@gmail.com wrote:
  Hello,
 
  documentation tells I can insert a task in queue during a datastore
  transaction.
 http://code.google.com/appengine/docs/java/taskqueue/overview.html#Ta...
 
  The example uses datastore low level api. Is there a way to do the same
 with
  JDO?
 
  Thank you
 
 Fabrizio

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Re: [appengine-java] Re: Restlet, GAE, Android and Google Account authentication (oauth)

2011-01-11 Thread Fabrizio Accatino

Is this the ClientResource class you use?
http://www.restlet.org/documentation/2.0/jse/api/org/restlet/resource/ClientResource.html

If yes,  ClientResource class has a setCookies method.
Get the auth cookie from GAE and then set it.


Also Request has setCookie
http://www.restlet.org/documentation/2.1/gwt/api/org/restlet/client/Request.html


Let me know if it works.


http://www.restlet.org/documentation/2.1/gwt/api/org/restlet/client/Request.html
Fabrizio



On Tue, Jan 11, 2011 at 12:55 PM, Sky skysoftwaredes...@googlemail.comwrote:

 yes, that would be the way with simple httpClient. Maybe there is a
 way to couple the HttpClient with Restlet? It seems not to be
 documented...

 Maybe there is a way to use Restlet API or another Rest client library
 to do that above?

 Thanks!



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[appengine-java] Task queue + datastore transaction + jdo: is it possible?

2011-01-11 Thread Fabrizio Accatino

Hello,

documentation tells I can insert a task in queue during a datastore
transaction.
http://code.google.com/appengine/docs/java/taskqueue/overview.html#Tasks_Within_Transactions

The example uses datastore low level api. Is there a way to do the same with
JDO?

Thank you

   Fabrizio

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Re: [appengine-java] Re: SQL injection on App Engine ?

2011-01-11 Thread Fabrizio Accatino

I don't want to start a flame. I'd like to understand a bit more datastore
and jdo and how to use them better. :)

So, the problem exists. Can you confirm?
I agree with you: it's a developer problem and not a jdo or datastore
problem. But it's the same as the classic sql injection attack: it's always
caused by developer error.

Last: on GAE the problem is very less important and mitigated than classic
sql. Infact in GAE you cannot inject the classic sql injection sequence like
dummy' or '1'='1 . But this is due to the fact that datastore is not able
to manage 1==1. So, as you wrote, it's important to use parameters and not
concatenated strings. Exactly the same as classic sql. :)

Have I correctly understood?

Fabrizio

On Sun, Jan 9, 2011 at 9:29 AM, datanucleus andy_jeffer...@yahoo.comwrote:

And that is the developer who has left it open to that. Any sane
developer would have put parameters in the query

String q = select from Employee where managerID == :user lastName
== :name;

and there any vulnerability disappears. :-P
Besides which the query written like that would also optimise far
better

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Re: [appengine-java] Restlet, GAE, Android and Google Account authentication (oauth)

2011-01-10 Thread Fabrizio Accatino

I'm not sure if I have undestood your question.
I have done Android--GAE connection using the AccountManager class:


First: get an authentication token using AccountManager (ah is App
Engine):
...
AccountManager mgr = AccountManager.get(context);
...
AccountManagerFutureBundle accountManagerFuture =
mgr.getAuthToken(account, ah, null, (Activity) context, null, null);
Bundle authTokenBundle = accountManagerFuture.getResult();
authToken = authTokenBundle.get(AccountManager.KEY_AUTHTOKEN).toString();
...


Then retrive authentication cookie using DefaultHttpClient passing the
authToken. The url is:
String url = http://myapp.appspot.com/_ah/login; + ?continue= +
URLEncoder.encode(_gaeAppBaseUrl, UTF-8) + auth= +
URLEncoder.encode(authToken, UTF-8);

The auth cookie is ACSID



   Fabrizio


On Mon, Jan 10, 2011 at 10:04 AM, Sky skysoftwaredes...@googlemail.comwrote:

 Hello,
 does anyone know how to use Restlet in combination with OAUTH on GAE
 and Android? I
 searched the web and did not found any useful documentations or
 tutorial. Seems like this is not supported anymore?

 What I want to do is connecting Android to Google App engine. On App
 engine I want to use the Google user service
 (userServiceManager.isUserLoggedIn()), to authenticate the user with
 his Google Account.

 Here is my Restlet Server Code, which works well:
 public class UploadServerApplication extends Application {
  @Override
  public Restlet createInboundRoot() {
  Router router = new Router(getContext());

 getConnectorService().getClientProtocols().add(Protocol.FILE);
 router.attachDefault(UploadServerResource.class);
return router;
  }
 }
 Resource:
 UploadServerResource extends ServerResource implements UploadResource
 {
 public UploadResult upload(UploadData uploadData) {
  UserService userServiceManager =
 UserServiceFactory.getUserService();
  boolean authenticated = userServiceManager.isUserLoggedIn();---
 always false in my tests!
  if (authenticated) { ...  result.setSuccess(true); }
  else { ...result.setSuccess(false);   }
  return result;
 }
 -
 Android client code (where is the place to set Google OAuth Cookie??):
 ClientResource cr = new ClientResource(http://192.168.1.4:/
 upload);
 UploadResource resource = cr.wrap(UploadResource.class);
 UploadData uploadData = new UploadData();
 ...
 UploadResult result = resource.uploadTrack(uploadData);
 ...

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Re: [google-appengine] Re: Announcing the High Replication Datastore for App Engine

2011-01-06 Thread Fabrizio Accatino

Ikai,

can you elaborate a bit more? Will it be available a java sdk in the future?
The Datastore Admin will be available also for java apps?
http://code.google.com/appengine/docs/adminconsole/datastoreadmin.html

Thank you

Fabrizio


On Thu, Jan 6, 2011 at 12:17 AM, Ikai Lan (Google)
ikai.l+gro...@google.comikai.l%2bgro...@google.com
 wrote:

 By the way, I should mention that there is no Java SDK. This is *almost*
 completely a server side change.

 The Python SDK ships with migration tools for migrating an existing
 application to an HR instance. As of right now, there are no Java tools -
 please use the Python SDK if you need this functionality.


 --
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Re: [appengine-java] Re: SQL injection on App Engine ?

2010-12-28 Thread Fabrizio Accatino

Datanucleus,

perhaps my post was too impetuous. Sorry.
Actually sql injection (not real SQL) is a small issue on GAE. You are
right. GAE does not use SQL but you can inject piece of query into.

A very simple example:
String name = request.getParameter(name);
String q = select from Employee where lastName == ' + name + ';
Query query = pm.newQuery(Employee.class, q);

Case1 (good): send name = smith
Case2 (not good): send name = smith' || lastName == 'foo

OK. It's not so dangerous. Infact you cannot send strong injections like
smith' || '1'=='1 because the engine (actually) refuse it.

So, you are right. No big problem.


   Fabrizio


On Mon, Dec 27, 2010 at 10:29 AM, datanucleus andy_jeffer...@yahoo.comwrote:

 SQL injection ? into a database that doesn't support SQL? Please
 present a clear example of how such a thing can happen and what effect
 it can have. The application designer is the person who allows such a
 thing, not the underlying API

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Re: [appengine-java] migrating to 1.4 task queues

2010-12-27 Thread Fabrizio

@Ikai, 
about url -- withUrl please update documentation/examples at 
http://code.google.com/appengine/docs/java/taskqueue/overview.html

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[appengine-java] SQL injection on App Engine ?

2010-12-26 Thread Fabrizio Accatino

In a previous post John pointed out that App Engine is subject to attacks
like SQL injection. He recommended to use parametrized query instead of
concatenating strings to build the query. I think he is right.
Perhaps I missed some points but the docuementation does not point it out.
http://code.google.com/appengine/docs/java/datastore/queriesandindexes.html
A suggestion to Google guys: add a clear warning on documentation about
using concatenated queries and remove concatenated examples (or make it
clear to not use them on real apps).

IMHO  :)


Fabrizio


On Sat, Dec 25, 2010 at 6:42 PM, John jwb...@gmail.com wrote:

 Really, it's important to use parameterized queries. Looking at this style
 of code causes me to assume the app will be subject to attack in the
 'SQL'-injection style. (Acknowledging that what would be injected would have
 to be something other than SQL.)

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Re: [appengine-java] Re: The API call mail.Send() required more quota than is available.

2010-12-17 Thread Fabrizio Accatino

... or enqueue your outgoing message on a task queue with a slow run
frequency (let's say 5/minutes).
I do that and I'm very happy.  :)

Fabrizio


On Sat, Dec 18, 2010 at 1:15 AM, Ikai Lan (Google)
ikai.l+gro...@google.comikai.l%2bgro...@google.com
 wrote:

 8 is fairly arbitrary, but there's always going to be a number that bothers
 people, be it 10, 20 or 50.

 You should enable billing. We only charge if you go above the daily free
 quota, and it raises the rate limit. That means that if you send 10 emails
 per minute and only do this once a month, you'll never hit this quota limit,
 and we'll likely not bill you since you'll still be well within our free
 quota.



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Re: [appengine-java] Re: Local datastore empty after updating to SDK 1.4.0

2010-12-05 Thread Fabrizio Accatino

Ian,

I had read your previous post (2010-04-15). As you wrote, I'd also like to
find a more authoritatively response. But I haven't found it. :(

fabrizio

On Sun, Dec 5, 2010 at 11:47 AM, Ian Marshall ianmarshall...@gmail.comwrote:

Does this post help?

http://www.google.com/url?url=http://groups.google.com/g/f907f736/t/27097b9831aff32a/d/c16b898dcaad10ef%3Fq%3D%23c16b898dcaad10efei=aG37TNXvFoHA_Abn1qTaAgsa=tct=rescd=10source=groupsusg=AFQjCNGa_5Wk3KqMn7czeKwR0zocC07gOw

On Dec 4, 2:40 pm, Fabrizio fht...@gmail.com wrote:
I have a project with a local datastore. There was many entities in
it.

I have update the sdk from 1.3.7 to 1.4.0. Now the local datastore is
empty. My app does not show data and local management tell datastore
is empty (http://localhost:/_ah/admin/datastore).

I've also tried to revert the local_db.bin file to my previous
version from my local subversion. But it does not work. :(

Any idea?

Fabrizio

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Re: [appengine-java] Re: Local datastore empty after updating to SDK 1.4.0

2010-12-05 Thread Fabrizio Accatino

Sorry Ian,

I don't understand.  Do you delete the local datastore and create it again?
If yes, how?

Fabrizio


On Sun, Dec 5, 2010 at 5:16 PM, Ian Marshall ianmarshall...@gmail.comwrote:

 I have a test local datastore. I also have a procedure now to delete
 this whenever I install a new GAE/J SDK. This solved my problem of
 disappearing test data.



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Re: [appengine-java] Tasks SSL

2010-11-09 Thread Fabrizio Accatino

- what error do you receive? copy and paste log
- try to remove ssl. The connection is internal. (AFAIK)

fabrizio

On Tue, Nov 9, 2010 at 3:37 AM, Dom Derrien dominique.derr...@gmail.comwrote:

Context:
- Tasks as defined in
http://code.google.com/appengine/docs/java/taskqueue/overview.html
- Secured URLs as described in
http://code.google.com/appengine/docs/java/config/webxml.html

In the following excerpts, you can see I want to be sure that only
administrators can access over SSL resources in the /_admin folder.
This works fine when I access JSP page or call a servlet. However, the
automatic task execution fails continuously on production, which
generates a never ending task rescheduling...

- Sample task scheduling:
QueueFactory.getDefaultQueue().add(url(/
_admin/...).method(Method.GET));
- web.xml part:
security-constraint
web-resource-collection
url-pattern/_admin/*/url-pattern
/web-resource-collection
auth-constraint
role-nameadmin/role-name
/auth-constraint
user-data-constraint
transport-guaranteeCONFIDENTIAL/transport-guarantee
/user-data-constraint
/security-constraint

As tasks are issued server-side and consumed there without having
transited on the public Internet (I hope so), I don't think there's a
risk of having non encrypted task calls.

I've just created another path for my tasks entry points (/_tasks) and
the path is not covered by the SSL restriction. Is it the right way?
Or did I hit a defect?

Thanks,
A+, Dom

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Re: [appengine-java] OpenID Development server

2010-10-20 Thread Fabrizio Accatino

Issue opened
http://code.google.com/p/googleappengine/issues/detail?id=3922
http://code.google.com/p/googleappengine/issues/detail?id=3922

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Re: [appengine-java] OpenID Development server

2010-10-16 Thread Fabrizio Accatino

I also noticed different urls generated by userService.createLoginURL
String loginUrl = userService.createLoginURL(continueURL, null, providerUrl,
attributes);

On GAE I get URLs like this one:
http://myapp.appspot.com/_ah/login_redir?claimid=myopenid.comcontinue=http://myapp.appspot.com/myurl
It works fine. I can login with openID.

On local development server I get:
http://localhost:/_ah/login?continue=myurl
And this does not work. :(

The question remains the same: is OpenID supported by local Development
server?
Google guys, please, give me an hint...

fabrizio

On Thu, Oct 7, 2010 at 10:46 AM, Fabrizio fht...@gmail.com wrote:

Hello, I'm testing OpenID (SDK 1.3.7). My env is: Eclipse + GAE Plugin.
Question: is OpenID supported by local development server?

I have a protected area. I force users to login with:

security-constraint

web-resource-collection

url-pattern/protected/*/url-pattern

/web-resource-collection

auth-constraint

role-name*/role-name

/auth-constraint

/security-constraint

When I try to access the protected area from production I get correctly
redirect to:

http://MYAPP.appspot.com/_ah/login_required?continue=http://MYAPP.appspot.com/protected/

But on local development server I get:
http://localhost:/_ah/login?continue=http://localhost:/protected/

Why?

fabrizio

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Re: [appengine-java] Re: OpenID Development server

2010-10-10 Thread Fabrizio Accatino

I have no problem opening an issue. But actually I don't understand if I
have a problem/wrong_configuration or App Engine has a bug.
I'm waiting for a reply from Google guys...  :)

fabrizio

2010/10/9 ArtemGr artem...@gmail.com

 OpenID support is still experimental, there are several open issues
 concerning it. If you feel you encountered a new problem, maybe you
 should file an issue!



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[appengine-java] Re: OpenID Development server

2010-10-09 Thread Fabrizio

Any idea?



On Oct 7, 10:46 am, Fabrizio fht...@gmail.com wrote:
 Hello, I'm testing OpenID (SDK 1.3.7). My env is: Eclipse + GAE Plugin.
 Question: is OpenID supported by local development server?

 I have a protected area. I force users to login with:
 security-constraint
 web-resource-collection
 url-pattern/protected/*/url-pattern
 /web-resource-collection
 auth-constraint
 role-name*/role-name
 /auth-constraint

 /security-constraint

 When I try to access the protected area from production I get correctly
 redirect 
 to:http://MYAPP.appspot.com/_ah/login_required?continue=http://MYAPP.app...

 But on local development server I
 get:http://localhost:/_ah/login?continue=http://localhost:/protec...

 Why?

 fabrizio

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[appengine-java] OpenID Development server

2010-10-07 Thread Fabrizio

Hello, I'm testing OpenID (SDK 1.3.7). My env is: Eclipse + GAE Plugin.
Question: is OpenID supported by local development server?


I have a protected area. I force users to login with:
security-constraint
web-resource-collection
url-pattern/protected/*/url-pattern
/web-resource-collection
auth-constraint
role-name*/role-name
/auth-constraint

/security-constraint


When I try to access the protected area from production I get correctly
redirect to:
http://MYAPP.appspot.com/_ah/login_required?continue=http://MYAPP.appspot.com/protected/



But on local development server I
get:http://localhost:/_ah/login?continue=http://localhost:/protected/




Why?


fabrizio

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Re: [appengine-java] parameter values in taskqueue that contain '' gets cut

2010-09-20 Thread Fabrizio Accatino

- how have you url-encoded the parameters? Can you share the code?
- have you tried Method.POST instead of GET?

fabrizio

On Mon, Sep 20, 2010 at 7:45 AM, mar_novice mariocape1...@gmail.com wrote:

When using task queue and the parameters contain an ampersand, it gets
cut off when you try to its value.

example:

Queue queue = QueueFactory.getDefaultQueue();
queue.add(
url(/mailer)
.param(msg,you me)
.method(Method.GET)
);

and in mailer servlet, when you try to get the value of msg
...
msg = request.getParameter(msg);
...

what i get is you only. The characters starting from the to the
end gets cut off. I even tried to url encode first the message.. but
still it gets cut off.. Is this a bug?

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Re: [appengine-java] task queues and retries

2010-07-19 Thread Fabrizio Accatino

AFAIK if you don't catch exceptions, you'll get HTTP 500 error.
Can you post your code?
Are you sure that you do not try/catch the exception?

fabrizio


On Mon, Jul 19, 2010 at 12:38 AM, Philip Tucker ptuc...@gmail.com wrote:

 One of my tasks encountered a failure and wasn't retried. I think it's
 because the servlet returned a 200 response, but I don't know why it
 did since the exception bubbled all the way up to the base servlet. Do
 we need to explicitly return a 5xx error code in exception cases for
 retries to work?

 07-18 02:46PM 06.907 /cleanerq 200 29515ms 9156cpu_ms 5404api_cpu_ms
 0kb AppEngine-Google; (+http://code.google.com/appengine)
 0.1.0.2 - - [18/Jul/2010:14:46:36 -0700] POST /cleanerq HTTP/1.1 200
 0 http://11.latest.wordwisegame.appspot.com/starttasks; AppEngine-
 Google; (+http://code.google.com/appengine)
 11.latest.wordwisegame.appspot.com ms=29516 cpu_ms=9157
 api_cpu_ms=5404 cpm_usd=0.254392 queue_name=cleaner-queue
 task_name=5681724147391472665 exit_code=104

 ...

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[appengine-java] Re: Limiting the number of requests per IP each minute

2010-07-03 Thread Fabrizio

Hello,

I also used memcache to limit the max number of requests/minute. It
works very well.

Key: ipaddress
Value: counter (int)

I put the items in memcache with an expiration of 60 seconds.

   Map props = new HashMap();
   props.put(GCacheFactory.EXPIRATION_DELTA, 60);
   CacheFactory cacheFactory =
CacheManager.getInstance().getCacheFactory();
   Cache cache = cacheFactory.createCache(props);
   cache.put(key, value);


fabrizio

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[appengine-java] Re: Disable URLFetchService cache

2010-06-10 Thread Fabrizio

I had the same problem. I solved with:

...
URL urlObj = new URL(url);
HttpURLConnection connection = (HttpURLConnection)
urlObj.openConnection();
connection.addRequestProperty(Cache-Control, no-cache,max-age=0);
connection.addRequestProperty(Pragma, no-cache);
...


fabrizio


On Jun 9, 2:29 pm, mar_novice mariocape1...@gmail.com wrote:
 Is there a way to disable urlfetchService cache? When I made a
 urlfetch, sometimes, what I get is the cached result.

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[appengine-java] Re: PdfBox text extraction GAE

2010-05-06 Thread Fabrizio

Ken,

I do not retrived the pdf using PdfBox but using an explicit http
connection.
Then I get the content and pass it to PdfBox.

Code:

URL urlObj = new URL(pdfUrl);
HttpURLConnection connection = (HttpURLConnection)
urlObj.openConnection();
int httpRespCode = connection.getResponseCode();

if (httpRespCode == 200) {
RandomAccessBuffer tempMemBuffer = new RandomAccessBuffer();
PDDocument doc = PDDocument.load(connection.getInputStream(),
tempMemBuffer);
...


   fabrizio


On May 4, 11:17 pm, kldaniels kendani...@gmail.com wrote:
 This is interesting that you got this to work.

 I have been trying to work with PDFBox with GAE as well, and have not
 been able to get very far.  I am attempting to open a pdf document as
 follows but only get a IOException:

      URL url = new URL(http://www.pbs.org/newshour/extra/teachers/
 lessonplans/media/clock_gettysburg_9-3.pdf);
      PDDocument doc = PDDocument.load(url);
      PDDocumentInformation info = doc.getDocumentInformation();

 I am not sure what I am doing wrong.

 Ken

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[appengine-java] Re: TaskOptions.countdownMillis not used

2010-04-25 Thread Fabrizio

Hello Max,

I noticed it because I got wrong data. So I checked the logs.
But, now, I'm trying to reprocude the issue but I cannot. The delay is
good.
I'll continue the test and I'll let you know.

Thank you for your help.


   fabrizio




On Apr 23, 10:40 pm, Max Ross (Google) maxr+appeng...@google.com
wrote:
  The difference between 2 seconds and immediate isn't much.  How are you
 measuring?  Do you have logs that show the time at which the task was
 enqueued and the time at which it executes?

 Thanks,
 Max



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[appengine-java] TaskOptions.countdownMillis not used

2010-04-22 Thread Fabrizio

Hello,

I need to add a task in the TaskQueue. But I need a small delay before
exectution (2 seconds). I use countdownMillis(long) to delay the
execution.  But execution starts immediatelly. I don't understand if
my code is wrong or if there is a problem with countdownMillis.

My code is:

Queue queue = QueueFactory.getQueue(queueName);
TaskOptions taskOpts = TaskOptions.Builder.url(url);
taskOpts.countdownMillis(delay);
taskOpts.method(Method.GET);
queue.add(taskOpts);


   Thank you for help


fabrizio

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[appengine-java] PdfBox text extraction GAE

2010-04-20 Thread Fabrizio

If anyone is interested...

PdfBox text extration  GAE
How to do text extraction from pdf files using PdfBox on Google App
Engine
http://fhtino.blogspot.com/2010/04/pdfbox-text-extration-gae.html

fabrizio

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[appengine-java] Re: How do I write data in my Google App Engine Datastore to com.google.appengine.api.datastore.Text

2010-03-13 Thread Fabrizio

Jake,

you don't manage null values.



I normally write:

@Persistent
private Text Data;

public void setData(String data) {
if (data == null)
this.Data = null;
else
this.Data = new Text(data);
}

public String getData() {
if (this.Data == null)
return null;
else
return this.Data.getValue();
}



   fabrizio


On Mar 12, 8:22 pm, Jake jbrooko...@cast.org wrote:
 Hey,

 I presume setMethod() refers to a getter/setter.  So, your persisted
 class would look like:

 @Persistent
 Text text;

 public void setText(String s) {
    this.text = new Text(s);

 }

 public String getText() {
    return this.text.getValue()

 }

 The App Engine API is your friend:  
 http://code.google.com/appengine/docs/java/javadoc/

 Jake

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[appengine-java] Re: Object property cannot accept null values.

2010-02-04 Thread Fabrizio

Use Double instead of double.
Double is an Object -- can be null.


  fabrizio


On Feb 5, 3:23 am, dreamy dreamy2c...@... wrote:
 I have create lot of Object in past. when  I add a property  private
 double price; to this object today .but  i query the record again,the
 exception is throw:

 java.lang.NullPointerException: Datastore entity with kind
 PurchaseBilling and key PurchaseBilling(178) has a null property named
 price.  This property is mapped to
 com.datong.drp.model.PurchaseBilling.price, which cannot accept null
 values.

 I must clear all data and insert again? is there any other method to
 add this property?

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[appengine-java] Re: Post/Get to a servlet from another servlet

2010-01-25 Thread Fabrizio

Consider using queue.
At the end of your servlet, enqueue a call to the same servlet and
pass one or more parameters with the next item to process.
Example:  /myservlet?nextID=90


  Fabrizio


On Jan 26, 5:07 am, edarroyo edgardo...@gmail.com wrote:
 I'm sorry if this is a stupid question, but is it possible to do a
 post request to another servlet from within a servlet?

 ..

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[appengine-java] Re: Many Request was aborted after waiting too long to attempt to service your request errors

2010-01-21 Thread Fabrizio

Since 10 hours I see no more errors!  I'm very happy!   :)))
(now: 2010-01-22 7:40 utc)

I haven't changed anything and no deploy.
Google Team, what have you done?

FYI, a couple of screenshot of the dashboard graph:

http://gs.fhtino.it/download/GAE2_no_more_error1.png?attredirects=0
http://gs.fhtino.it/download/GAE2_no_more_error2.png?attredirects=0


  Fabrizio


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[appengine-java] Re: Many Request was aborted after waiting too long to attempt to service your request errors

2010-01-15 Thread Fabrizio

I continue to get the errors. I really don't understand. My app is
very low traffic. But I have a cron. It fires every minute and does a
very little and fast job (normally  /myurl 200 59ms 80cpu_ms
21api_cpu_ms 0kb).
But sometime I get /myurl 500 10002ms 0cpu_ms 0kb.  Today rate is
10%, so I get 1 error every 10 request!.

I really don't understand. I have no idea.  :(((

I only noticed the presence of the warning
com.google.appengine.repackaged.com.google.common.base.FinalizableReferenc
eQueue in the near requests (before or after).  But, as John
said, it harmless.

Google guys, please, help me and the other with the same issue.


   Fabrizio



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[appengine-java] Re: Many Request was aborted after waiting too long to attempt to service your request errors

2010-01-15 Thread Fabrizio

John,

my app is very very simple. It does not use external frameworks or
libraries.

   fabrizio
  
 I think currently the only solution is to make you app  
 start up faster.  
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[appengine-java] Re: Accessing GMail Inbox

2009-12-21 Thread Fabrizio

AFAIK from GAW you can only communicate on port 80 and 443 (hhttp and
https). And you must use the Url Fetch service.

  fabrizio


On Dec 20, 5:36 pm, Pion onlee2...@gmail.com wrote:
 Thehttp://java.sun.com/products/javamail/FAQ.html#gmailshows how to
 access Gmail Inbox using JavaMail.
     //String host = imap.gmail.com;
     String host = pop.gmail.com;
     String username = user;
     String password = passwd;
     // ...
     //Store store = session.getStore(imaps);
     Store store = session.getStore(pop3s);
     store.connect(host, username, password);
     // ...

 I tried the above code and deployed it on GAE. I received the
 following log:

         Unable to locate provider for protocol: pop3s

 I switched to 'Store store = session.getStore(imaps);', It gave me
 similar error.

         Unable to locate provider for protocol: imaps

 I am using GAE 1.3.0.

 Please advise if this is even possible. If yes, what did I do wrong?
 Thanks in advance for your help.

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[appengine-java] Re: JDO Query limit? 1000?

2009-12-18 Thread Fabrizio

Stephen, you're right. I tested setRange(1200, 1500) and I get an
exception.

I'd like to understand more about that. Why datastore limits the first
parameter (skip) and not also the second?
I was thinking that the limit of a query was 1000 items. I was wrong.
So, I can get 5000 items with problem, but I cannot skip the first
1000.  Quite strange... IMHO

   fabrizio

On Dec 17, 10:39 pm, stephenp slpe...@gmail.com wrote:
 He meant setRange(1001, 2000) will fail. Datastore will only let you
 skip the first 1000. If you try to skip past more than 1000 you'll get
 an error. In your code, you're only skipping the first 10 setRange
 (10,1500).

 Stephen

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[appengine-java] Re: Many Request was aborted after waiting too long to attempt to service your request errors

2009-12-17 Thread Fabrizio

 If your cron job has to wait longer than 10 seconds while your app is
 reloading you will get this message.  Do you also see a loading
 request in the logs just after or before this error message?  If so
 then it is interesting that despite your 1 minute ping, engine is
 still swapping out your app.

I also get warning like
com.google.appengine.repackaged.com.google.common.base.FinalizableReferenceQueue
$SystemLoader loadFinalizer: Not allowed to access system class
loader...

In another thread, someone said these warnings are related to loading
requests.

Have you any idea/suggestion?


   fabrizio


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[appengine-java] JDO Query limit? 1000?

2009-12-17 Thread Fabrizio

(Perhpas it's a FAQ but I haven't found the response...)

I use JDO to access the DataStore. Is there any limit on the number of
items a query can return? I read of a limit of 1000 but I have done
some tests with more than 2000 entries. I can get all the items
without error.

PersistenceManager pm = PMF.get().getPersistenceManager();
ListPerson persons = (ListPerson) pm.newQuery(  select from  +
Person.class.getName()).execute();

Is there any limit?

   fabrizio

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[appengine-java] Re: JDO Query limit? 1000?

2009-12-17 Thread Fabrizio

I don't understand.  Can you explain a bit more?
I've tried this code. It works and I get 1490 items. Why?

PersistenceManager pm = PMF.get().getPersistenceManager();
Query qry = pm.newQuery(select from  + Person.class.getName() + 
where _age  4);
qry.setRange(10,1500);
ListPerson persons = (ListPerson) qry.execute();


  fabrizio


On Dec 17, 3:17 pm, abhi abhishek9...@gmail.com wrote:
 You sure will get all results , specially on offline mode , but you
 cant do paging in query for more than
 1000 results ,with Query query = pm.newQuery(YORRQUERY);
                 query.setRange(0 , 1001);

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[appengine-java] Re: JDO Query limit? 1000?

2009-12-17 Thread Fabrizio

It also works on Google App server !Very strange


My test jsp page:


body
%
PersistenceManager pm = PMF.get().getPersistenceManager();
Query qry = pm.newQuery(select from  + Person.class.getName() + 
where _age  4);
qry.setRange(10,1500);
ListPerson persons = (ListPerson) qry.execute();
%
SIZE:%=persons.size()%
hr /
% for (Person p : persons) {  %
%=p.getID()%
%  }
pm.close();  %
hr /
.



On Dec 17, 4:08 pm, abhi abhishek9...@gmail.com wrote:
 That will work only on local mode , if you use it on server you will
 get .
 ... threw an unexpected exception: java.lang.IllegalArgumentException:
 offset may not be above 1000  ..

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[appengine-java] Many Request was aborted after waiting too long to attempt to service your request errors

2009-12-16 Thread Fabrizio

Hello,

I have a cron job (1/m).  I get many random errors like:
12-16 06:43AM 34.115 /myurl..   500 10020ms 0cpu_ms 0kb
Request was aborted after waiting too long to attempt to service your
request. Most likely, this indicates that you have reached your
simultaneous dynamic request limit. This is almost always due to
excessively high latency in your app.

I think it's not caused by simultaneous dynamic request limit. I
make only 1 request/minute.
I also noticed an high time (more than 1ms).


When it works, the log is like this:
  12-16 06:48AM 20.059 /myurl...   200 156ms 191cpu_ms
95api_cpu_ms 0kb


Why some requests work and other crash? I don't change anything
between them.


   Fabrizio

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