[appengine-java] Re: Expires header automatically added (bug?)
Could you provide some code please? On Mar 1, 9:06 am, George Moschovitis george.moschovi...@gmail.com wrote: I do use Expires header as well and it works as expected. For statis resources you define explicit expiration using appengine-web.xml. It did work as expected. Now the Expires header is added automatically to *dynamic* request, even for request that don't require it. -g. -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Expires header automatically added (bug?)
Could you provide some code please? What kind of code should I provide? I do NOT set the Expires header in my code, and still GAE automatically adds the Expires header. -g. -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Expires header automatically added (bug?)
Well, if you do not like what GAE sets as Expires value, why not set yours? On Mar 1, 11:18 am, George Moschovitis george.moschovi...@gmail.com wrote: Could you provide some code please? What kind of code should I provide? I do NOT set the Expires header in my code, and still GAE automatically adds the Expires header. -g. -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Unable to establish HTTPS communication
Hi, You should cast the return from openConnection() to HttpURLConnection: URL requestURL = new URL(url); HttpURLConnection connection = (HttpURLConnection) requestURL.openConnection(); Depending on what you need to do you might not need to open the connection at all. It might be better to use the stream and readers like shown in the URL Fetch documentation you referenced (http:// code.google.com/appengine/docs/java/urlfetch/overview.html). Br, Ville On Feb 27, 9:15 pm, Persevering apo...@gmail.com wrote: Hi All, I am new to Google app and trying to build an application that would load some data from other site over hppts. Below is my code that is working in other applications but i am getting some errors with google app engine. Initially compiler is throwing error like - sun.net.www.protocol.https.HttpsURLConnectionImplis not supported by Google App Engine's Java runtime environment. My code is: java.net.URL requestURL = new URL(url); HttpsURLConnectionImpl h = (HttpsURLConnectionImpl)requestURL.openConnection(); and somehow i complied it using solution available at http:// 74.125.153.132/search?q=cache:http://blog.frankel.ch/tag/google; but i got error on local Development environment as mentioned below: com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler $Connection cannot be cast to sun.net.www.protocol.https.HttpsURLConnectionImpl java.lang.ClassCastException: com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler $Connection cannot be cast to sun.net.www.protocol.https.HttpsURLConnectionImpl I have also gone throughhttp://code.google.com/appengine/docs/java/urlfetch/overview.html but no luck. Please let me know how can i solve it. Thanks. -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: lost sub entity
If I recall, JDO is picky when it comes to being aware of changes made
to a persisted object. For example, changing fields directly
(object.field = newValue;) doesn't work - you need to use a getter/
setter (object.setField(newValue);). Perhaps you are encountering the
same issue here? Does the following type of thing work?
LIstSubEntity list = e.getMyList();
SubEntity first = list.remove(0);
list.add(first);
e.setMyList(list);
pm.makePersistent(e);
tx.commit();
Jake
On Feb 28, 11:05 am, Gunnar gunnar@gmail.com wrote:
Hi,
John and Karel, you are right about the placement of the commit
statement.
It worked in the test example because I only had one instance of
MyEntity.
I don't get any exception at all in the Eclipse console!
When I add a second instance of MyEntity if fails with Transaction is
not active as expected.
Now I've changed the code in the try statement like this, but still
the first sub entity is lost and no exception is thrown!
(Of cause it would fail it the list is empty.)
ListMyEntity results = (ListMyEntity) query.execute();
if (results.iterator().hasNext()) {
tx.begin();
MyEntity e = results.iterator().next();
ListSubEntity list = e.getMyList();
SubEntity first = list.remove(0);
boolean ok = list.add(first);
if (!ok) {
System.err.println(could not add first);
}
System.out.println(list);
pm.makePersistent(e);
tx.commit();
}
On 28 Feb, 02:51, John Patterson jdpatter...@gmail.com wrote:
This should be throwing an exception. The JavaDocs for
Transaction.commit() say
Commits the transaction. Whether this call succeeds or fails, all
subsequent method invocations on this object will throw
IllegalStateException.
When something does not work as you expect the first place to look is
the logs under your application console.
On 28 Feb 2010, at 05:25, Karel Alvarez wrote:
dont you get any exceptions stacktrace in the server console? it
would help... also you are calling commit() inside the for loop,
although the transactions is started only once... that would crash
in the second iteration in a normal db server, I am not sure what
GAE does with it, in any case I dont think it is what you intended...
On Sat, Feb 27, 2010 at 2:52 PM, Gunnar gunnar@gmail.com wrote:
Hi,
I have problem with reordering a List.
I created a test with an entity called MyEntity which have a
ListSubEntity.
First I persist one instance of MyEntity with a list containing 3
SubEntity.
This works fine. Then I call a reorder servlet that moves the first
SubEntity to the last position in the list.
The result is that the first SubEntity is lost and the datastore only
contains 2 SubEntity instances.
What can be wrong?
Here is the reorder code:
package com.google.appengine.demo;
import java.io.IOException;
import java.util.List;
import javax.jdo.PersistenceManager;
import javax.jdo.Query;
import javax.jdo.Transaction;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@SuppressWarnings(serial)
public class ReorderServlet extends HttpServlet {
�...@suppresswarnings(unchecked)
public void doGet(HttpServletRequest req, HttpServletResponse
resp)
throws IOException {
PersistenceManager pm =
PMF.get().getPersistenceManager();
Query query = pm.newQuery(MyEntity.class);
Transaction tx = pm.currentTransaction();
try {
tx.begin();
ListMyEntity results = (ListMyEntity)
query.execute();
if (results.iterator().hasNext()) {
for (MyEntity e : results) {
ListSubEntity list =
e.getMyList();
SubEntity first =
list.remove(0);
boolean ok = list.add(first);
if (!ok) {
System.err.println(could not add first);
}
System.out.println(list);
pm.makePersistent(e);
tx.commit();
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (tx.isActive())
tx.rollback();
query.closeAll();
pm.close();
}
[appengine-java] Re: Spreadsheets and GAE
Thanks Lior and Stephen. Good Info. In my situation, these are excel simple spreadsheets (with no formulas or macros etc..,). Customers download these spreadsheets, work on them and when they are done, they upload these to the site. As they upload, I need to validate that indeed they are the same spreadsheets they downloaded and that their entries are fine. Then, I show all successful entries in a grid. Then they verify , change, add whatever they want and basically commit. I would have used Apache POI..but, now I am curious if Google's spreadhsheet API may be sufficient for this. I also need to see if users can open these spreadsheets in their respective excel version and save and upload those into the web app. I guess I will need to do some digging. Are there any good web resources for this API? Or is the Google getting started doc is just fine. Thanks Praseed On Mar 1, 2:30 am, Houston startup coder stephenh...@gmail.com wrote: How complex are these spreadsheets? If all you need to do is upload some basic data, then have them save it as CSV and upload that into GAE. I'm assuming your spreadsheets are complex enough that you need them to actually be Microsoft Excel files. Lior's response made me consider your actual use case and it sounds like it could be worthwhile for you to try using the Google Spreadsheets API. I had considered it but my spreadsheet needs are slightly different, and you can read about my decision here:http://stephenhuey.wordpress.com/2010/01/01/docxgae/ Although I used the GaeVFS virtual file system in that blog post, you can actually do plenty of the typical file stuff in memory and just write out to the Blobstore. Basically, I needed my users to be able to download data in full-fledged Microsoft Excel spreadsheets, and since the traditional Java libraries out there aren't supported on GAE, I chose to use Microsoft's xlsx format which is a zip file consisting of text files and images. In case that sounds terrible, note that I'm using FreeMarker to help me modify template XML files, and that does make things a little bit cleaner. So in a nutshell, you can work with bona fide Microsoft Excel files on GAE if you use the xlsx file format and not the older xls file format. - Stephen Huey On Mar 1, 1:14 am, Lior Harsat lior.har...@gmail.com wrote: Hi Praseed, my application uses the google spreadsheet api for importing data. I have learned the following lessons from it: 1. performance is not great. the api runs over http and is limited to GAE request timeout (5 to 10) seconds. on some cases a single request exceed this time and you are required to handle these timeout (retry) 2. API inconsistencies. The API is not that stable. some of the examples posted on Google simply do not work. it could be very frustrating. 3. google spreadsheets are nice for low volume data. Handling masses of data is difficult. copy paste is limited. limited formulas (comparing to Excel) . very basic scripting support. you should really play with it and verify that your end user won't get frustrated with it. 4. accessing the spreadsheet requires authentication. it may be an overhead for your end users unless you handle it for them. Having said all of the above I still recommend it as it is free, doesn't require leaving the google API realm, and will probably mature over time. you need to make a deep analysis of your requirement to make sure the above limitation won't become showstoppers. Thanx, Lior On Feb 28, 6:41 pm, praseed prase...@gmail.com wrote: Hi all, New here. My app requires users to upload spreadsheets. The server has to make the data available on a grid (GWT)..the user then makes changes if any and press import.. This is when the data is stored in the data store in appropriate entities. Questions . If this is not GAE, i would have stored the uploaded file in the filesystem; used Apache POI to parse the file from a GWT-RPC service and return it to a GWT grid. Then, upon user selection, commit the data to persistence. Are there better (read: easier) ways to do this under GAE? Can I make use of the Spreadsheet Data API to do this instead? Do I need to store the file at all in that case? Is there something in the Google Docs Upload API I should be using? Since I am already committed to GAE and GWT, I wanted to make things as simpler as it can be. If I can avoid other external libraries..great. Thoughts? Cheers praseed -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Can not fetch record from DB
Hey,
getUserQuery.setFilter(userLogin == vLogin AND password ==
vPassword). Not but AND.
Keep in mind, the filter is JDOQL (?), not Java.
Jake
On Feb 27, 11:05 am, Andriy Andrunevchyn diyko...@gmail.com wrote:
Don't work all get methods
I've changed method according your advice it didn't help
public UserModel getUserByLoginAndPassword(String login, String
password) {
PersistenceManager pm = getPersistenceManager();
Query getUserQuery = pm.newQuery(UserModel.class);
getUserQuery.setFilter(userLogin == vLogin password ==
vPassword);
getUserQuery.declareParameters(String vLogin, String
vPassword);
UserModel result = null;
try {
ListUserModel list = (ListUserModel)
getUserQuery.execute(
login, password);
if (!list.isEmpty()) {
result = list.get(0);
}
} finally {
getUserQuery.closeAll();
releasePersistenceManager(pm);
}
return result;
}
Following method throw strange exception
public UserModel getUserByLogin(String login) {
PersistenceManager pm = getPersistenceManager();
Query getUserQuery = pm
.newQuery(select from UserModel userLogin ==
vLogin parameters
String vLogin);
/*
* getUserQuery.setFilter(userLogin == vLogin);
* getUserQuery.declareParameters(String vLogin);
*/
UserModel user = null;
try {
ListUserModel result = (ListUserModel)
getUserQuery
.execute(login);
if (!result.isEmpty())
user = result.get(0);
} finally {
getUserQuery.closeAll();
releasePersistenceManager(pm);
}
return user;
}
org.datanucleus.store.appengine.FatalNucleusUserException: Candidate
class could not be found: SELECT FROM UserModel userLogin == vLogin
PARAMETERS String vLogin
Perhaps I've forgotten some jdo configuration
Does anybody know how to fix it?
--
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[appengine-java] Re: Can not fetch record from DB
BAH! Sorry. I'm wrong - it supports . Un-Send. Facepalm.
Regardless, I think the error still lies in the JDOQL syntax.
http://www.jpox.org/docs/1_2/jdo/jdoql.html
Jake
On Mar 1, 9:23 am, Jake jbrooko...@cast.org wrote:
Hey,
getUserQuery.setFilter(userLogin == vLogin AND password ==
vPassword). Not but AND.
Keep in mind, the filter is JDOQL (?), not Java.
Jake
On Feb 27, 11:05 am, Andriy Andrunevchyn diyko...@gmail.com wrote:
Don't work all get methods
I've changed method according your advice it didn't help
public UserModel getUserByLoginAndPassword(String login, String
password) {
PersistenceManager pm = getPersistenceManager();
Query getUserQuery = pm.newQuery(UserModel.class);
getUserQuery.setFilter(userLogin == vLogin password ==
vPassword);
getUserQuery.declareParameters(String vLogin, String
vPassword);
UserModel result = null;
try {
ListUserModel list = (ListUserModel)
getUserQuery.execute(
login, password);
if (!list.isEmpty()) {
result = list.get(0);
}
} finally {
getUserQuery.closeAll();
releasePersistenceManager(pm);
}
return result;
}
Following method throw strange exception
public UserModel getUserByLogin(String login) {
PersistenceManager pm = getPersistenceManager();
Query getUserQuery = pm
.newQuery(select from UserModel userLogin
== vLogin parameters
String vLogin);
/*
* getUserQuery.setFilter(userLogin == vLogin);
* getUserQuery.declareParameters(String vLogin);
*/
UserModel user = null;
try {
ListUserModel result = (ListUserModel)
getUserQuery
.execute(login);
if (!result.isEmpty())
user = result.get(0);
} finally {
getUserQuery.closeAll();
releasePersistenceManager(pm);
}
return user;
}
org.datanucleus.store.appengine.FatalNucleusUserException: Candidate
class could not be found: SELECT FROM UserModel userLogin == vLogin
PARAMETERS String vLogin
Perhaps I've forgotten some jdo configuration
Does anybody know how to fix it?
--
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Re: [appengine-java] Re: lost sub entity
It is unusual that you see no stack trace. Are you sure you are not
catching it? You could step through the code line by line to see what
happens after the line with the problem.
Could this be something to do with setting the fetch group to
default? That seems to be the problem with a lot of peoples JDO code :)
On 1 Mar 2010, at 21:19, Jake wrote:
If I recall, JDO is picky when it comes to being aware of changes made
to a persisted object. For example, changing fields directly
(object.field = newValue;) doesn't work - you need to use a getter/
setter (object.setField(newValue);). Perhaps you are encountering the
same issue here? Does the following type of thing work?
LIstSubEntity list = e.getMyList();
SubEntity first = list.remove(0);
list.add(first);
e.setMyList(list);
pm.makePersistent(e);
tx.commit();
Jake
On Feb 28, 11:05 am, Gunnar gunnar@gmail.com wrote:
Hi,
John and Karel, you are right about the placement of the commit
statement.
It worked in the test example because I only had one instance of
MyEntity.
I don't get any exception at all in the Eclipse console!
When I add a second instance of MyEntity if fails with Transaction
is
not active as expected.
Now I've changed the code in the try statement like this, but still
the first sub entity is lost and no exception is thrown!
(Of cause it would fail it the list is empty.)
ListMyEntity results = (ListMyEntity) query.execute();
if (results.iterator().hasNext()) {
tx.begin();
MyEntity e = results.iterator().next();
ListSubEntity list = e.getMyList();
SubEntity first = list.remove(0);
boolean ok = list.add(first);
if (!ok) {
System.err.println(could not add first);
}
System.out.println(list);
pm.makePersistent(e);
tx.commit();
}
On 28 Feb, 02:51, John Patterson jdpatter...@gmail.com wrote:
This should be throwing an exception. The JavaDocs for
Transaction.commit() say
Commits the transaction. Whether this call succeeds or fails, all
subsequent method invocations on this object will throw
IllegalStateException.
When something does not work as you expect the first place to look
is
the logs under your application console.
On 28 Feb 2010, at 05:25, Karel Alvarez wrote:
dont you get any exceptions stacktrace in the server console? it
would help... also you are calling commit() inside the for loop,
although the transactions is started only once... that would crash
in the second iteration in a normal db server, I am not sure what
GAE does with it, in any case I dont think it is what you
intended...
On Sat, Feb 27, 2010 at 2:52 PM, Gunnar gunnar@gmail.com
wrote:
Hi,
I have problem with reordering a List.
I created a test with an entity called MyEntity which have a
ListSubEntity.
First I persist one instance of MyEntity with a list containing 3
SubEntity.
This works fine. Then I call a reorder servlet that moves the first
SubEntity to the last position in the list.
The result is that the first SubEntity is lost and the datastore
only
contains 2 SubEntity instances.
What can be wrong?
Here is the reorder code:
package com.google.appengine.demo;
import java.io.IOException;
import java.util.List;
import javax.jdo.PersistenceManager;
import javax.jdo.Query;
import javax.jdo.Transaction;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@SuppressWarnings(serial)
public class ReorderServlet extends HttpServlet {
@SuppressWarnings(unchecked)
public void doGet(HttpServletRequest req,
HttpServletResponse
resp)
throws IOException {
PersistenceManager pm =
PMF.get().getPersistenceManager();
Query query = pm.newQuery(MyEntity.class);
Transaction tx = pm.currentTransaction();
try {
tx.begin();
ListMyEntity results = (ListMyEntity)
query.execute();
if (results.iterator().hasNext()) {
for (MyEntity e : results) {
ListSubEntity list =
e.getMyList();
SubEntity first =
list.remove(0);
boolean ok =
list.add(first);
if (!ok) {
System.err.println(could not add first);
}
System.out.println(list);
pm.makePersistent(e);
tx.commit();
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (tx.isActive())
[appengine-java] Re: Flash arcade game GAE based
You can use memcache to help speed up access to the DB. All communication over GAE has to be done using HTTP... So, that makes it harder to things like pushing real time messages to the clients. You can use a technique called Long Polling, but requests must return in 30 seconds, and currently, applications have a max of 30 simultaneous requests. Basically, the request starts a thread that sleeps most of the time, waiting to return data to the client when it's ready. One the client receives the update, it makes another long polling request. Hope this helps. - Derrick On Feb 28, 2:58 am, Ahmed Khalifa derkhal...@gmail.com wrote: hi all, I am writing a multiplayer flash arcade game in actionscript .. i have discovered GAE recently and thought that it might be a very good choice for building and hosting my server .. however, i realize that arcade games need an almost realtime responsive capacity from the server .. besides the server has to be looping on receiving position object of Client A, storing it in a DB, Fetching Client B position object and sending it back .. this will result in a huge number of DB requests either storing, fetching or deleting which will quickly exhaust the CPU quota for the application .. So, I was wondering if any one had an idea or a reference to come around these two problems of real time response and CPU exhaustion by DB calls best regards, A. Khalifa -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Flash arcade game GAE based
thanks for the reply .. are there any other servers/hosts that provide a near real time client/ server communication?? Plus, i don't exactly get your part about the long polling and 30 simultanous requests limit .. can you elaborate more regards, On Mar 1, 4:55 pm, A1programmer derrick.simp...@gmail.com wrote: You can use memcache to help speed up access to the DB. All communication over GAE has to be done using HTTP... So, that makes it harder to things like pushing real time messages to the clients. You can use a technique called Long Polling, but requests must return in 30 seconds, and currently, applications have a max of 30 simultaneous requests. Basically, the request starts a thread that sleeps most of the time, waiting to return data to the client when it's ready. One the client receives the update, it makes another long polling request. Hope this helps. - Derrick On Feb 28, 2:58 am, Ahmed Khalifa derkhal...@gmail.com wrote: hi all, I am writing a multiplayer flash arcade game in actionscript .. i have discovered GAE recently and thought that it might be a very good choice for building and hosting my server .. however, i realize that arcade games need an almost realtime responsive capacity from the server .. besides the server has to be looping on receiving position object of Client A, storing it in a DB, Fetching Client B position object and sending it back .. this will result in a huge number of DB requests either storing, fetching or deleting which will quickly exhaust the CPU quota for the application .. So, I was wondering if any one had an idea or a reference to come around these two problems of real time response and CPU exhaustion by DB calls best regards, A. Khalifa -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Citical Security error in Accounts Java API: request.getUserPrincipal() gets wrong username/email
Ikai, what you said makes sense to me, but in the last week I've been seeing something a little different with Safari (version 4.0.4). I protect some App Engine URLs in the app by requiring authentication based on Google Apps, and in order to easily access those URLs in testing, I simply log the browser into Google Apps first (e.g. Mail). Or when I'm not signed into Google Apps and try to access the URL, it has me do Google Apps authentication, and then I can access both the URL and Mail. But in Firefox 3.5.8, the authentication is independent, so if I've authenticated for my App Engine URL and sign out of Mail, I can still access the App Engine URL in the browser. Stephen Huey On Feb 25, 3:01 am, Thomas Schnocklake thomas.schnockl...@googlemail.com wrote: Yes, i implemented this already. I developped the widget in GAE in Java. There I used OAuth to authenticate against the gdata-api. Then I stored the combination of usern...@gappdomain.xxx and the OAuth accesskey in the GAE persistant storage. Everything works fine. So when i log in google apps the includes Gadget reads the logged in username (request.getUserPrincipal().getName() )) and searches with this username for the OAuth key. But than the problem: sometimes the username (request.getUserPrincipal().getName() ) is wrong, so i read the data (e.g. Contacts List) of the wrong user. So actuelly I don't need a solution for authentication but I need to know which user is actually really logged in to google apps. Any ideas? This should be a quite important topic for all developpers who want to enhance google apps with gae, isn' t it? thanks 2010/2/25 Ikai L (Google) ika...@google.com Probably OAuth, though I'm not sure how that will work with a gadget. In most places gadgets will include a user ID with the makeRequest. On Tue, Feb 23, 2010 at 12:23 PM, Thomas Schnocklake thomas.schnockl...@googlemail.com wrote: Thank you for your answer. So what would you suppose to use for authentication for a gadget that is places in google apps (e.g. gmail, google sites ) ? thanks thomas 2010/2/18 Ikai L (Google) ika...@google.com Yes, this seems to make sense. Being logged into Google Apps is independent of being logged into an App Engine application. They don't use the same cookie. App Engine's User service allows you to use Google logins, but not the Google Apps session. On Tue, Feb 16, 2010 at 3:29 AM, tsschnoc thomas.schnockl...@googlemail.com wrote: Hello, I use App Engine in my Google Apps domain and restricted the authentification of app engine to my apps domain. (see http://code.google.com/appengine/articles/auth.html ) I developed a widget and use this in multiple accounts of my google apps domain. When i switch from one account (of my apps domain) to the other, the former account is displayed in the widget (Java: request.getUserPrincipal().getName() ). So the gadget placed on my Google Apps Inbox displays data of a user different to the user logged in to google apps. I noticed that the problems goes away when i wait some minutes ( session expiration ?? ). see picture: http://picasaweb.google.com/lh/photo/QDcR2Lgk2xI2-UQ77BoGXw?feat=dire... -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- Ikai Lan Developer Programs Engineer, Google App Engine http://googleappengine.blogspot.com|http://twitter.com/app_engine -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- Ikai Lan Developer Programs Engineer, Google App Engine http://googleappengine.blogspot.com|http://twitter.com/app_engine -- You received this message because you are subscribed to the Google Groups Google App Engine for
[appengine-java] how to save binary data in JDO
hello together, i started working with the app engine some days ago, and now i want to save some binary data (pdf, etc.) from my app (eg by clicking a button) in the storage system. anybody who can help me doing this? (tutorials, etc.) greatz flo -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Scheduled Tasks aborted early
John, My application is hardly used right now, so there is certainly NO other requests coming in. So, I still don't understand why execution is cut after 10 seconds instead of promised 30 seconds. With such limitation GAE for Java is practically making impossible to use the most popular web framework (i.e. Spring MVC + Spring Security + Spring Core), but I'd be interested to hear how you can replace such stack with something based on Guice. regards, Eugene On Feb 28, 11:55 pm, John Patterson jdpatter...@gmail.com wrote: You get this message when you app is still starting while other requests come in. The only current solution is to reduce start up time - pinging is not a satisfactory solution because you still get frequent loading requests. With Guice I was able to reduce star up by using a non AOP version which did no bytecode enhancement. Also, try delaying initialising components until they are needed. On 1 Mar 2010, at 08:45, Eugene Kuleshov wrote: I have Java application deployed on the appengine and it has several job definitions. However I see that Scheduled Tasks are aborted within 10 seconds from the start, even so corresponding FAQ entry states 30 seconds.http://code.google.com/appengine/docs/java/runtime.html#Quotas_and_Li... This is a big problem for any applications using Springframework, which has startup time about 20 seconds. Here is corresponding entry from the log file for one of the executions of such scheduled task. --- 1. 02-28 02:45PM 39.147 /fetch.htm?... 500 10012ms 0cpu_ms 0kb See details 0.1.0.1 - - [28/Feb/2010:14:45:49 -0800] GET /fetch.htm?... HTTP/1.1 500 0 - - ipsc-stats.appspot.com 2. W 02-28 02:45PM 49.160 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. Please see http://code.google.com/appengine/docs/quotas.htmlfor more details. --- Can you please advise what could be done in such and if I am missing anything obvious? Thanks Eugene -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com . To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com . For more options, visit this group athttp://groups.google.com/group/google-appengine-java?hl=en . -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Scheduled Tasks aborted early
Also, that this 10 seconds issue actually appear mostly when my scheduled tasks are kicked, so in result they never start, even so user requests from the regular UI are coming trough. It seem like this problem been introduced recently Thanks Eugene On Mar 1, 11:35 am, Eugene Kuleshov ekules...@gmail.com wrote: John, My application is hardly used right now, so there is certainly NO other requests coming in. So, I still don't understand why execution is cut after 10 seconds instead of promised 30 seconds. With such limitation GAE for Java is practically making impossible to use the most popular web framework (i.e. Spring MVC + Spring Security + Spring Core), but I'd be interested to hear how you can replace such stack with something based on Guice. regards, Eugene On Feb 28, 11:55 pm, John Patterson jdpatter...@gmail.com wrote: You get this message when you app is still starting while other requests come in. The only current solution is to reduce start up time - pinging is not a satisfactory solution because you still get frequent loading requests. With Guice I was able to reduce star up by using a non AOP version which did no bytecode enhancement. Also, try delaying initialising components until they are needed. On 1 Mar 2010, at 08:45, Eugene Kuleshov wrote: I have Java application deployed on the appengine and it has several job definitions. However I see that Scheduled Tasks are aborted within 10 seconds from the start, even so corresponding FAQ entry states 30 seconds.http://code.google.com/appengine/docs/java/runtime.html#Quotas_and_Li... This is a big problem for any applications using Springframework, which has startup time about 20 seconds. Here is corresponding entry from the log file for one of the executions of such scheduled task. --- 1. 02-28 02:45PM 39.147 /fetch.htm?... 500 10012ms 0cpu_ms 0kb See details 0.1.0.1 - - [28/Feb/2010:14:45:49 -0800] GET /fetch.htm?... HTTP/1.1 500 0 - - ipsc-stats.appspot.com 2. W 02-28 02:45PM 49.160 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. Please see http://code.google.com/appengine/docs/quotas.htmlformore details. --- Can you please advise what could be done in such and if I am missing anything obvious? Thanks Eugene -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com . To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com . For more options, visit this group athttp://groups.google.com/group/google-appengine-java?hl=en . -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
Re: [appengine-java] JSF 2 on GAE getting java.io.NotSerializableException: javax.faces.component.html.HtmlSelectManyListbox after trying to run from production
Hi Daniel, Looking at the javadoc for HtmlSelectManyListbox ( http://java.sun.com/javaee/javaserverfaces/2.0/docs/api/javax/faces/component/html/HtmlSelectManyListbox.html ) it looks like it doesn't implement Serializable. Since you are binding to it in a session scoped bean, you must have a reference to it in your bean, then it looks like GAE is trying to serialize the session, which includes your bound instance of that class. This is all just guesswork based on your stack trace. If it were my code, I would probably try to figure out how to do what I need to do without binding jsf controls in my managed beans. Joel On Sun, Feb 28, 2010 at 3:19 PM, Daniel vedm...@gmail.com wrote: Hi I got a small JSF 2 application with 1 managed bean defined as @SessionScoped and i just added a HtmlSelectManyListbox and did binding to it from h:selectManyListbox all works 100% from local server, but after deploying im getting exception... and i did add implements Serializable to the class and added private static final long serialVersionUID my gae sdk version is: Your SDK: Release: 1.3.0 Timestamp: Mon Dec 14 20:47:37 IST 2009 API versions: [1.0] This the exception java.lang.RuntimeException: java.io.NotSerializableException: javax.faces.component.html.HtmlSelectManyListbox at com.google.apphosting.runtime.jetty.SessionManager.serialize(SessionManager.java: 361) at com.google.apphosting.runtime.jetty.SessionManager.createEntityForSession(SessionManager.java: 341) at com.google.apphosting.runtime.jetty.SessionManager $AppEngineSession.save(SessionManager.java:162) at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java: 41) at org.mortbay.jetty.servlet.ServletHandler $CachedChain.doFilter(ServletHandler.java:1084) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java: 43) at org.mortbay.jetty.servlet.ServletHandler $CachedChain.doFilter(ServletHandler.java:1084) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java: 360) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java: 216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java: 181) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java: 712) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java: 405) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java: 238) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java: 139) at org.mortbay.jetty.Server.handle(Server.java:313) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java: 506) at org.mortbay.jetty.HttpConnection $RequestHandler.headerComplete(HttpConnection.java:830) at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java: 76) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381) at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java: 135) at com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java: 235) at com.google.apphosting.base.RuntimePb$EvaluationRuntime $6.handleBlockingRequest(RuntimePb.java:5485) at com.google.apphosting.base.RuntimePb$EvaluationRuntime $6.handleBlockingRequest(RuntimePb.java:5483) at com.google.net.rpc.impl.BlockingApplicationHandler.handleRequest(BlockingApplicationHandler.java: 24) at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java: 363) at com.google.net.rpc.impl.Server$2.run(Server.java:837) at com.google.tracing.LocalTraceSpanRunnable.run(LocalTraceSpanRunnable.java: 56) at com.google.tracing.LocalTraceSpanBuilder.internalContinueSpan(LocalTraceSpanBuilder.java: 536) at com.google.net.rpc.impl.Server.startRpc(Server.java:792) at com.google.net.rpc.impl.Server.processRequest(Server.java:367) at com.google.net.rpc.impl.ServerConnection.messageReceived(ServerConnection.java: 448) at com.google.net.rpc.impl.RpcConnection.parseMessages(RpcConnection.java: 319) at com.google.net.rpc.impl.RpcConnection.dataReceived(RpcConnection.java: 290) at com.google.net.async.Connection.handleReadEvent(Connection.java: 474) at com.google.net.async.EventDispatcher.processNetworkEvents(EventDispatcher.java: 774) at com.google.net.async.EventDispatcher.internalLoop(EventDispatcher.java: 205) at com.google.net.async.EventDispatcher.loop(EventDispatcher.java: 101) at com.google.net.rpc.RpcService.runUntilServerShutdown(RpcService.java: 251) at com.google.apphosting.runtime.JavaRuntime $RpcRunnable.run(JavaRuntime.java:394)
Re: [appengine-java] Re: Scheduled Tasks aborted early
Hi Eugene, All it takes are two requests to see that error - the first to start the application loading and then any other request (even a request for a css file or refreshing the page) will wait 10 seconds and then throw that exception. It is rare that a single page does not need more than one request. In my opinion this loading request problem is the biggest hidden gotcha that should be written in big red letters on the introduction page. It could end up requiring you to discard the frameworks you are accustomed to using. Something which helped me was to split my app into an admin version and a user facing client version. That reduced the loading time of the client version significantly. On 1 Mar 2010, at 23:35, Eugene Kuleshov wrote: John, My application is hardly used right now, so there is certainly NO other requests coming in. So, I still don't understand why execution is cut after 10 seconds instead of promised 30 seconds. With such limitation GAE for Java is practically making impossible to use the most popular web framework (i.e. Spring MVC + Spring Security + Spring Core), but I'd be interested to hear how you can replace such stack with something based on Guice. regards, Eugene On Feb 28, 11:55 pm, John Patterson jdpatter...@gmail.com wrote: You get this message when you app is still starting while other requests come in. The only current solution is to reduce start up time - pinging is not a satisfactory solution because you still get frequent loading requests. With Guice I was able to reduce star up by using a non AOP version which did no bytecode enhancement. Also, try delaying initialising components until they are needed. On 1 Mar 2010, at 08:45, Eugene Kuleshov wrote: I have Java application deployed on the appengine and it has several job definitions. However I see that Scheduled Tasks are aborted within 10 seconds from the start, even so corresponding FAQ entry states 30 seconds.http://code.google.com/appengine/docs/java/runtime.html#Quotas_and_Li ... This is a big problem for any applications using Springframework, which has startup time about 20 seconds. Here is corresponding entry from the log file for one of the executions of such scheduled task. --- 1. 02-28 02:45PM 39.147 /fetch.htm?... 500 10012ms 0cpu_ms 0kb See details 0.1.0.1 - - [28/Feb/2010:14:45:49 -0800] GET /fetch.htm?... HTTP/1.1 500 0 - - ipsc-stats.appspot.com 2. W 02-28 02:45PM 49.160 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. Please see http://code.google.com/appengine/docs/quotas.htmlfor more details. --- Can you please advise what could be done in such and if I am missing anything obvious? Thanks Eugene -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com . To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com . For more options, visit this group athttp://groups.google.com/group/google-appengine-java?hl=en . -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com . To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en . -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Scheduled Tasks aborted early
John, I hear you, but I am quite certain that there is no other requests. It happen in a middle of the night when there is no users and the failing request is initiated by the GAE's own cron, so there is no refresh of the pages, nor any requests for css. With Spring framework, the most of the initialization happens in either startup servlet or context listener, so splitting application won't address the issue. Another problem is that request is terminated without providing any stack trace, so it is rather hard to debug issue on a live system. regards, Eugene On Mar 1, 12:10 pm, John Patterson jdpatter...@gmail.com wrote: Hi Eugene, All it takes are two requests to see that error - the first to start the application loading and then any other request (even a request for a css file or refreshing the page) will wait 10 seconds and then throw that exception. It is rare that a single page does not need more than one request. In my opinion this loading request problem is the biggest hidden gotcha that should be written in big red letters on the introduction page. It could end up requiring you to discard the frameworks you are accustomed to using. Something which helped me was to split my app into an admin version and a user facing client version. That reduced the loading time of the client version significantly. On 1 Mar 2010, at 23:35, Eugene Kuleshov wrote: John, My application is hardly used right now, so there is certainly NO other requests coming in. So, I still don't understand why execution is cut after 10 seconds instead of promised 30 seconds. With such limitation GAE for Java is practically making impossible to use the most popular web framework (i.e. Spring MVC + Spring Security + Spring Core), but I'd be interested to hear how you can replace such stack with something based on Guice. regards, Eugene On Feb 28, 11:55 pm, John Patterson jdpatter...@gmail.com wrote: You get this message when you app is still starting while other requests come in. The only current solution is to reduce start up time - pinging is not a satisfactory solution because you still get frequent loading requests. With Guice I was able to reduce star up by using a non AOP version which did no bytecode enhancement. Also, try delaying initialising components until they are needed. On 1 Mar 2010, at 08:45, Eugene Kuleshov wrote: I have Java application deployed on the appengine and it has several job definitions. However I see that Scheduled Tasks are aborted within 10 seconds from the start, even so corresponding FAQ entry states 30 seconds.http://code.google.com/appengine/docs/java/runtime.html#Quotas_and_Li ... This is a big problem for any applications using Springframework, which has startup time about 20 seconds. Here is corresponding entry from the log file for one of the executions of such scheduled task. --- 1. 02-28 02:45PM 39.147 /fetch.htm?... 500 10012ms 0cpu_ms 0kb See details 0.1.0.1 - - [28/Feb/2010:14:45:49 -0800] GET /fetch.htm?... HTTP/1.1 500 0 - - ipsc-stats.appspot.com 2. W 02-28 02:45PM 49.160 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. Please see http://code.google.com/appengine/docs/quotas.htmlformore details. --- Can you please advise what could be done in such and if I am missing anything obvious? Thanks Eugene -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com . To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com . For more options, visit this group athttp://groups.google.com/group/google-appengine-java?hl=en . -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com . To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com . For more options, visit this group athttp://groups.google.com/group/google-appengine-java?hl=en . -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] How to migrate data from an existing database to APP Engine?
Hi, I looked at APP Engine for the first time this weekend and understand clearly the steps to create a new application and persist new data to APP Engine. What I could not find an answer for is: How to migrate existing data from a relational database to APP Engine so that I can then migrate a small app that queries the data and allows user to modify or add new records? Thanks, HugoMatus -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
Re: [appengine-java] error while deploying web appln in google appengine
I had the same issue and resolved it by removing all jre installations and leaving out just the jdk. On Sat, Feb 27, 2010 at 11:02 PM, shanthi ramabhadran 77can...@gmail.comwrote: How to resolve the following error while deploying java web appln in google appengine?? 8% Compiling jsp files. 11% Compiling java files. Error Details: Feb 28, 2010 9:21:57 AM org.apache.jasper.JspC processFile INFO: Built File: \index.jsp java.lang.NoClassDefFoundError: com/sun/tools/javac/Main Caused by: java.lang.ClassNotFoundException: com.sun.tools.javac.Main at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) Exception in thread main Could not find the main class: com.sun.tools.javac.Main. Program will exit. Error while executing: C:\Program Files\Java\jre6\bin\javac.exe - classpath /C:/Program Files/appengine-java-sdk-1.3.0/lib/impl/ appengine-api-labs.jar;/C:/Program Files/appengine-java-sdk-1.3.0/lib/ impl/appengine-api-stubs.jar;/C:/Program Files/appengine-java- sdk-1.3.0/lib/impl/appengine-api.jar;/C:/Program Files/appengine-java- sdk-1.3.0/lib/impl/appengine-local-runtime.jar;C:\Program Files \appengine-java-sdk-1.3.0\lib\shared\appengine-local-runtime- shared.jar;C:\Program Files\appengine-java-sdk-1.3.0\lib\shared \geronimo-el_1.0_spec-1.0.1.jar;C:\Program Files\appengine-java- sdk-1.3.0\lib\shared\geronimo-jsp_2.1_spec-1.0.1.jar;C:\Program Files \appengine-java-sdk-1.3.0\lib\shared\geronimo- servlet_2.5_spec-1.2.jar;C:\Program Files\appengine-java-sdk-1.3.0\lib \shared\jsp\repackaged-appengine-ant-1.6.5.jar;C:\Program Files \appengine-java-sdk-1.3.0\lib\shared\jsp\repackaged-appengine-ant- launcher-1.6.5.jar;C:\Program Files\appengine-java-sdk-1.3.0\lib\shared \jsp\repackaged-appengine-commons-el-1.0.jar;C:\Program Files \appengine-java-sdk-1.3.0\lib\shared\jsp\repackaged-appengine-commons- logging-1.1.1.jar;C:\Program Files\appengine-java-sdk-1.3.0\lib\shared \jsp\repackaged-appengine-jasper-compiler-5.0.28.jar;C:\Program Files \appengine-java-sdk-1.3.0\lib\shared\jsp\repackaged-appengine-jasper- runtime-5.0.28.jar;C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \appcfg5666792600954450490.tmp\WEB-INF\classes;C: \DOCUME~1\ADMINI~1\LOCALS~1\Temp\appcfg5666792600954450490.tmp\WEB-INF \lib\jdo2-api-2.3-eb.jar;C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \appcfg5666792600954450490.tmp\WEB-INF\lib\geronimo- jpa_3.0_spec-1.1.1.jar;C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \appcfg5666792600954450490.tmp\WEB-INF\lib\appengine-api-1.0- sdk-1.3.0.jar;C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \appcfg5666792600954450490.tmp\WEB-INF\lib\geronimo- jta_1.1_spec-1.1.1.jar;C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \appcfg5666792600954450490.tmp\WEB-INF\lib\datanucleus-jpa-1.1.5.jar;C: \DOCUME~1\ADMINI~1\LOCALS~1\Temp\appcfg5666792600954450490.tmp\WEB-INF \lib\appengine-api-labs-1.3.0.jar;C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \appcfg5666792600954450490.tmp\WEB-INF\lib\datanucleus- core-1.1.5.jar;C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \appcfg5666792600954450490.tmp\WEB-INF\lib\datanucleus- appengine-1.0.4.1.final.jar;C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \appcfg5666792600954450490.tmp\WEB-INF\lib\repackaged-appengine- jakarta-jstl-1.1.2.jar;C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \appcfg5666792600954450490.tmp\WEB-INF\lib\repackaged-appengine- jakarta-standard-1.1.2.jar;C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \appcfg5666792600954450490.tmp\WEB-INF\lib\repackaged-appengine- ant-1.6.5.jar;C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \appcfg5666792600954450490.tmp\WEB-INF\lib\repackaged-appengine-ant- launcher-1.6.5.jar;C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \appcfg5666792600954450490.tmp\WEB-INF\lib\repackaged-appengine- commons-el-1.0.jar;C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \appcfg5666792600954450490.tmp\WEB-INF\lib\repackaged-appengine- commons-logging-1.1.1.jar;C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \appcfg5666792600954450490.tmp\WEB-INF\lib\repackaged-appengine-jasper- compiler-5.0.28.jar;C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \appcfg5666792600954450490.tmp\WEB-INF\lib\repackaged-appengine-jasper- runtime-5.0.28.jar; -d C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \appcfg5666792600954450490.tmp\WEB-INF\classes -encoding UTF-8 C: \DOCUME~1\ADMINI~1\LOCALS~1\Temp\appcfg5666792600954450490.tmp\WEB-INF \classes\org\apache\jsp\index_jsp.java com.google.appengine.tools.admin.JspCompilationException: Failed to compile the generated JSP java files. Unable to update app: Failed to compile the generated JSP java files. Please see the logs [C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp \appcfg8759329262789349213.log] for further information. -- You received this message because you are subscribed to the Google Groups Google App Engine for Java
[appengine-java] Database import feature request for Java
Hi, We really need following feature urgently mentioned in blog:- Database import: move GBs of data easily into your App Engine app. Matching export capabilities are coming soon, hopefully within a month. Even if database-import for java just upload few MBs, and it is in preview edition, that should be fine with us for now. -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: how to save binary data in JDO
Hey,
Saving binary data to the datastore isn't too difficult - you can just
use a Blob type and ensure that you don't break the 1MB capacity of a
single entity. You can see my class declaration below. The hard
part is converting a file upload to a byte[] and then from a byte[]
back into what you would consider a downloadable file. That
depends, somewhat, on your implementation. For example, I use the
Wicket architecture and all I need to do is
FileUpload f = fileUploadField.getFileUpload();
BinaryFileData b = new BinaryFileData(f.getBytes());
pm.makePersistent(b);
I presume you are not using Wicket, but some other framework. You'll
need to look into how it handles file uploads.
You may also find this interesting: http://code.google.com/p/gaevfs/
I haven't used it, but it skips the whole byte[] thing entirely.
Jake
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class BinaryFileData implements Serializable {
private static final long serialVersionUID = 1L;
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key key;
@Persistent
private String name;
@Persistent
private String mimeType;
@Persistent(defaultFetchGroup=true)
private Blob data;
public BinaryFileData(byte[] bytes) {
this.data = new Blob(bytes);
}
public byte[] getData() {
return data.getBytes();
}
public void setData(byte[] d) {
this.data = new Blob(d);
}
}
On Mar 1, 11:25 am, Valentino Hankypants f.hirs...@gmx.at wrote:
hello together,
i started working with the app engine some days ago, and now i want to
save some binary data (pdf, etc.) from my app (eg by clicking a
button) in the storage system.
anybody who can help me doing this? (tutorials, etc.)
greatz
flo
--
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Re: [appengine-java] Re: Scheduled Tasks aborted early
When you get the Request was aborted after waiting too long ... message there will be no stack trace because your code is never run. Rest assured you can run tasks for 30 seconds - I do it myself. Context listeners are run on every loading request so why do you say that splitting your code will not reduce start up time? Surely if there is less code to initialise it will take less time no? Could you post your log file of requests before and after the error? On 2 Mar 2010, at 00:17, Eugene Kuleshov wrote: John, I hear you, but I am quite certain that there is no other requests. It happen in a middle of the night when there is no users and the failing request is initiated by the GAE's own cron, so there is no refresh of the pages, nor any requests for css. With Spring framework, the most of the initialization happens in either startup servlet or context listener, so splitting application won't address the issue. Another problem is that request is terminated without providing any stack trace, so it is rather hard to debug issue on a live system. regards, Eugene On Mar 1, 12:10 pm, John Patterson jdpatter...@gmail.com wrote: Hi Eugene, All it takes are two requests to see that error - the first to start the application loading and then any other request (even a request for a css file or refreshing the page) will wait 10 seconds and then throw that exception. It is rare that a single page does not need more than one request. In my opinion this loading request problem is the biggest hidden gotcha that should be written in big red letters on the introduction page. It could end up requiring you to discard the frameworks you are accustomed to using. Something which helped me was to split my app into an admin version and a user facing client version. That reduced the loading time of the client version significantly. On 1 Mar 2010, at 23:35, Eugene Kuleshov wrote: John, My application is hardly used right now, so there is certainly NO other requests coming in. So, I still don't understand why execution is cut after 10 seconds instead of promised 30 seconds. With such limitation GAE for Java is practically making impossible to use the most popular web framework (i.e. Spring MVC + Spring Security + Spring Core), but I'd be interested to hear how you can replace such stack with something based on Guice. regards, Eugene On Feb 28, 11:55 pm, John Patterson jdpatter...@gmail.com wrote: You get this message when you app is still starting while other requests come in. The only current solution is to reduce start up time - pinging is not a satisfactory solution because you still get frequent loading requests. With Guice I was able to reduce star up by using a non AOP version which did no bytecode enhancement. Also, try delaying initialising components until they are needed. On 1 Mar 2010, at 08:45, Eugene Kuleshov wrote: I have Java application deployed on the appengine and it has several job definitions. However I see that Scheduled Tasks are aborted within 10 seconds from the start, even so corresponding FAQ entry states 30 seconds.http://code.google.com/appengine/docs/java/runtime.html#Quotas_and_Li ... This is a big problem for any applications using Springframework, which has startup time about 20 seconds. Here is corresponding entry from the log file for one of the executions of such scheduled task. --- 1. 02-28 02:45PM 39.147 /fetch.htm?... 500 10012ms 0cpu_ms 0kb See details 0.1.0.1 - - [28/Feb/2010:14:45:49 -0800] GET /fetch.htm?... HTTP/1.1 500 0 - - ipsc-stats.appspot.com 2. W 02-28 02:45PM 49.160 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. Please see http://code.google.com/appengine/docs/quotas.htmlformore details. --- Can you please advise what could be done in such and if I am missing anything obvious? Thanks Eugene -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com . To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com . For more options, visit this group athttp://groups.google.com/group/google-appengine-java?hl=en . -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com . To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com . For more options, visit this group athttp://groups.google.com/group/google-appengine-java?hl=en . -- You received this message because you are subscribed to the Google Groups Google App Engine for Java
[appengine-java] Re: how to save binary data in JDO
so i only can upload binary data up to 1 MB?
any possibility to upload binary data with GBs?
greatz
On 1 Mrz., 18:36, Jake jbrooko...@cast.org wrote:
Hey,
Saving binary data to the datastore isn't too difficult - you can just
use a Blob type and ensure that you don't break the 1MB capacity of a
single entity. You can see my class declaration below. The hard
part is converting a file upload to a byte[] and then from a byte[]
back into what you would consider a downloadable file. That
depends, somewhat, on your implementation. For example, I use the
Wicket architecture and all I need to do is
FileUpload f = fileUploadField.getFileUpload();
BinaryFileData b = new BinaryFileData(f.getBytes());
pm.makePersistent(b);
I presume you are not using Wicket, but some other framework. You'll
need to look into how it handles file uploads.
You may also find this interesting:http://code.google.com/p/gaevfs/
I haven't used it, but it skips the whole byte[] thing entirely.
Jake
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class BinaryFileData implements Serializable {
private static final long serialVersionUID = 1L;
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key key;
@Persistent
private String name;
@Persistent
private String mimeType;
@Persistent(defaultFetchGroup=true)
private Blob data;
public BinaryFileData(byte[] bytes) {
this.data = new Blob(bytes);
}
public byte[] getData() {
return data.getBytes();
}
public void setData(byte[] d) {
this.data = new Blob(d);
}
}
On Mar 1, 11:25 am, Valentino Hankypants f.hirs...@gmx.at wrote:
hello together,
i started working with the app engine some days ago, and now i want to
save some binary data (pdf, etc.) from my app (eg by clicking a
button) in the storage system.
anybody who can help me doing this? (tutorials, etc.)
greatz
flo
--
You received this message because you are subscribed to the Google Groups
Google App Engine for Java group.
To post to this group, send email to google-appengine-j...@googlegroups.com.
To unsubscribe from this group, send email to
google-appengine-java+unsubscr...@googlegroups.com.
For more options, visit this group at
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[appengine-java] Re: Scheduled Tasks aborted early
John, I've posted the pretty much complete log in my very first message. If I read it correctly the request took 10012ms and it haven't used any CPU (0cpu_ms) and there was NO other requests within 30 minutes around that time. More over, if I kick the very same url as defined in cron.xml manually from the browser, it works. So, the issue seem only affects requests coming from the cron.xml The only thing I could do to to avoid execution of context listener (besides of dropping Spring MVC and Spring Security) is split application into a two separate apps, but then I won't be able to access the same data storage. regards, Eugene On Mar 1, 12:41 pm, John Patterson jdpatter...@gmail.com wrote: When you get the Request was aborted after waiting too long ... message there will be no stack trace because your code is never run. Rest assured you can run tasks for 30 seconds - I do it myself. Context listeners are run on every loading request so why do you say that splitting your code will not reduce start up time? Surely if there is less code to initialise it will take less time no? Could you post your log file of requests before and after the error? On 2 Mar 2010, at 00:17, Eugene Kuleshov wrote: John, I hear you, but I am quite certain that there is no other requests. It happen in a middle of the night when there is no users and the failing request is initiated by the GAE's own cron, so there is no refresh of the pages, nor any requests for css. With Spring framework, the most of the initialization happens in either startup servlet or context listener, so splitting application won't address the issue. Another problem is that request is terminated without providing any stack trace, so it is rather hard to debug issue on a live system. regards, Eugene On Mar 1, 12:10 pm, John Patterson jdpatter...@gmail.com wrote: Hi Eugene, All it takes are two requests to see that error - the first to start the application loading and then any other request (even a request for a css file or refreshing the page) will wait 10 seconds and then throw that exception. It is rare that a single page does not need more than one request. In my opinion this loading request problem is the biggest hidden gotcha that should be written in big red letters on the introduction page. It could end up requiring you to discard the frameworks you are accustomed to using. Something which helped me was to split my app into an admin version and a user facing client version. That reduced the loading time of the client version significantly. On 1 Mar 2010, at 23:35, Eugene Kuleshov wrote: John, My application is hardly used right now, so there is certainly NO other requests coming in. So, I still don't understand why execution is cut after 10 seconds instead of promised 30 seconds. With such limitation GAE for Java is practically making impossible to use the most popular web framework (i.e. Spring MVC + Spring Security + Spring Core), but I'd be interested to hear how you can replace such stack with something based on Guice. regards, Eugene On Feb 28, 11:55 pm, John Patterson jdpatter...@gmail.com wrote: You get this message when you app is still starting while other requests come in. The only current solution is to reduce start up time - pinging is not a satisfactory solution because you still get frequent loading requests. With Guice I was able to reduce star up by using a non AOP version which did no bytecode enhancement. Also, try delaying initialising components until they are needed. On 1 Mar 2010, at 08:45, Eugene Kuleshov wrote: I have Java application deployed on the appengine and it has several job definitions. However I see that Scheduled Tasks are aborted within 10 seconds from the start, even so corresponding FAQ entry states 30 seconds.http://code.google.com/appengine/docs/java/runtime.html#Quotas_and_Li ... This is a big problem for any applications using Springframework, which has startup time about 20 seconds. Here is corresponding entry from the log file for one of the executions of such scheduled task. --- 1. 02-28 02:45PM 39.147 /fetch.htm?... 500 10012ms 0cpu_ms 0kb See details 0.1.0.1 - - [28/Feb/2010:14:45:49 -0800] GET /fetch.htm?... HTTP/1.1 500 0 - - ipsc-stats.appspot.com 2. W 02-28 02:45PM 49.160 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. Please see http://code.google.com/appengine/docs/quotas.htmlformoredetails. --- Can you please advise what could be done in such and if I am missing anything obvious? Thanks Eugene -- You received this message because you are
[appengine-java] Re: lost sub entity
Hi,
I followed Jakes advice to do e.setList(list) but no change.
I've also stepped through my code, but there is no exception!
Btw I use version 1.3.1 of the SDK.
Gunnar
On 1 mar, 15:28, John Patterson jdpatter...@gmail.com wrote:
It is unusual that you see no stack trace. Are you sure you are not
catching it? You could step through the code line by line to see what
happens after the line with the problem.
Could this be something to do with setting the fetch group to
default? That seems to be the problem with a lot of peoples JDO code :)
On 1 Mar 2010, at 21:19, Jake wrote:
If I recall, JDO is picky when it comes to being aware of changes made
to a persisted object. For example, changing fields directly
(object.field = newValue;) doesn't work - you need to use a getter/
setter (object.setField(newValue);). Perhaps you are encountering the
same issue here? Does the following type of thing work?
LIstSubEntity list = e.getMyList();
SubEntity first = list.remove(0);
list.add(first);
e.setMyList(list);
pm.makePersistent(e);
tx.commit();
Jake
On Feb 28, 11:05 am, Gunnar gunnar@gmail.com wrote:
Hi,
John and Karel, you are right about the placement of the commit
statement.
It worked in the test example because I only had one instance of
MyEntity.
I don't get any exception at all in the Eclipse console!
When I add a second instance of MyEntity if fails with Transaction
is
not active as expected.
Now I've changed the code in the try statement like this, but still
the first sub entity is lost and no exception is thrown!
(Of cause it would fail it the list is empty.)
ListMyEntity results = (ListMyEntity) query.execute();
if (results.iterator().hasNext()) {
tx.begin();
MyEntity e = results.iterator().next();
ListSubEntity list = e.getMyList();
SubEntity first = list.remove(0);
boolean ok = list.add(first);
if (!ok) {
System.err.println(could not add first);
}
System.out.println(list);
pm.makePersistent(e);
tx.commit();
}
On 28 Feb, 02:51, John Patterson jdpatter...@gmail.com wrote:
This should be throwing an exception. The JavaDocs for
Transaction.commit() say
Commits the transaction. Whether this call succeeds or fails, all
subsequent method invocations on this object will throw
IllegalStateException.
When something does not work as you expect the first place to look
is
the logs under your application console.
On 28 Feb 2010, at 05:25, Karel Alvarez wrote:
dont you get any exceptions stacktrace in the server console? it
would help... also you are calling commit() inside the for loop,
although the transactions is started only once... that would crash
in the second iteration in a normal db server, I am not sure what
GAE does with it, in any case I dont think it is what you
intended...
On Sat, Feb 27, 2010 at 2:52 PM, Gunnar gunnar@gmail.com
wrote:
Hi,
I have problem with reordering a List.
I created a test with an entity called MyEntity which have a
ListSubEntity.
First I persist one instance of MyEntity with a list containing 3
SubEntity.
This works fine. Then I call a reorder servlet that moves the first
SubEntity to the last position in the list.
The result is that the first SubEntity is lost and the datastore
only
contains 2 SubEntity instances.
What can be wrong?
Here is the reorder code:
package com.google.appengine.demo;
import java.io.IOException;
import java.util.List;
import javax.jdo.PersistenceManager;
import javax.jdo.Query;
import javax.jdo.Transaction;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@SuppressWarnings(serial)
public class ReorderServlet extends HttpServlet {
�...@suppresswarnings(unchecked)
public void doGet(HttpServletRequest req,
HttpServletResponse
resp)
throws IOException {
PersistenceManager pm =
PMF.get().getPersistenceManager();
Query query = pm.newQuery(MyEntity.class);
Transaction tx = pm.currentTransaction();
try {
tx.begin();
ListMyEntity results = (ListMyEntity)
query.execute();
if (results.iterator().hasNext()) {
for (MyEntity e : results) {
ListSubEntity list =
e.getMyList();
SubEntity first =
list.remove(0);
boolean ok =
list.add(first);
if (!ok) {
System.err.println(could not add first);
[appengine-java] Re: lost sub entity
Hi,
I have not defined any fetch group, should I? If so how should I do
that?
Gunnar
On 1 mar, 15:28, John Patterson jdpatter...@gmail.com wrote:
It is unusual that you see no stack trace. Are you sure you are not
catching it? You could step through the code line by line to see what
happens after the line with the problem.
Could this be something to do with setting the fetch group to
default? That seems to be the problem with a lot of peoples JDO code :)
On 1 Mar 2010, at 21:19, Jake wrote:
If I recall, JDO is picky when it comes to being aware of changes made
to a persisted object. For example, changing fields directly
(object.field = newValue;) doesn't work - you need to use a getter/
setter (object.setField(newValue);). Perhaps you are encountering the
same issue here? Does the following type of thing work?
LIstSubEntity list = e.getMyList();
SubEntity first = list.remove(0);
list.add(first);
e.setMyList(list);
pm.makePersistent(e);
tx.commit();
Jake
On Feb 28, 11:05 am, Gunnar gunnar@gmail.com wrote:
Hi,
John and Karel, you are right about the placement of the commit
statement.
It worked in the test example because I only had one instance of
MyEntity.
I don't get any exception at all in the Eclipse console!
When I add a second instance of MyEntity if fails with Transaction
is
not active as expected.
Now I've changed the code in the try statement like this, but still
the first sub entity is lost and no exception is thrown!
(Of cause it would fail it the list is empty.)
ListMyEntity results = (ListMyEntity) query.execute();
if (results.iterator().hasNext()) {
tx.begin();
MyEntity e = results.iterator().next();
ListSubEntity list = e.getMyList();
SubEntity first = list.remove(0);
boolean ok = list.add(first);
if (!ok) {
System.err.println(could not add first);
}
System.out.println(list);
pm.makePersistent(e);
tx.commit();
}
On 28 Feb, 02:51, John Patterson jdpatter...@gmail.com wrote:
This should be throwing an exception. The JavaDocs for
Transaction.commit() say
Commits the transaction. Whether this call succeeds or fails, all
subsequent method invocations on this object will throw
IllegalStateException.
When something does not work as you expect the first place to look
is
the logs under your application console.
On 28 Feb 2010, at 05:25, Karel Alvarez wrote:
dont you get any exceptions stacktrace in the server console? it
would help... also you are calling commit() inside the for loop,
although the transactions is started only once... that would crash
in the second iteration in a normal db server, I am not sure what
GAE does with it, in any case I dont think it is what you
intended...
On Sat, Feb 27, 2010 at 2:52 PM, Gunnar gunnar@gmail.com
wrote:
Hi,
I have problem with reordering a List.
I created a test with an entity called MyEntity which have a
ListSubEntity.
First I persist one instance of MyEntity with a list containing 3
SubEntity.
This works fine. Then I call a reorder servlet that moves the first
SubEntity to the last position in the list.
The result is that the first SubEntity is lost and the datastore
only
contains 2 SubEntity instances.
What can be wrong?
Here is the reorder code:
package com.google.appengine.demo;
import java.io.IOException;
import java.util.List;
import javax.jdo.PersistenceManager;
import javax.jdo.Query;
import javax.jdo.Transaction;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@SuppressWarnings(serial)
public class ReorderServlet extends HttpServlet {
�...@suppresswarnings(unchecked)
public void doGet(HttpServletRequest req,
HttpServletResponse
resp)
throws IOException {
PersistenceManager pm =
PMF.get().getPersistenceManager();
Query query = pm.newQuery(MyEntity.class);
Transaction tx = pm.currentTransaction();
try {
tx.begin();
ListMyEntity results = (ListMyEntity)
query.execute();
if (results.iterator().hasNext()) {
for (MyEntity e : results) {
ListSubEntity list =
e.getMyList();
SubEntity first =
list.remove(0);
boolean ok =
list.add(first);
if (!ok) {
System.err.println(could not add first);
}
Re: [appengine-java] Re: Scheduled Tasks aborted early
The pasted log is a bit hard to read... but it looks to me like two requests. One at 02-28 02:45PM 39 and another at 02-28 02:45PM 49. Or is that just the way it printed? The idea is to split the app into different _versions_ not different apps. Then they use the same datastore but apart from that act almost like separate apps. In my situation my admin app takes care of all the loading and processing data - kicking off tasks etc. On 2 Mar 2010, at 00:54, Eugene Kuleshov wrote: John, I've posted the pretty much complete log in my very first message. If I read it correctly the request took 10012ms and it haven't used any CPU (0cpu_ms) and there was NO other requests within 30 minutes around that time. More over, if I kick the very same url as defined in cron.xml manually from the browser, it works. So, the issue seem only affects requests coming from the cron.xml The only thing I could do to to avoid execution of context listener (besides of dropping Spring MVC and Spring Security) is split application into a two separate apps, but then I won't be able to access the same data storage. regards, Eugene On Mar 1, 12:41 pm, John Patterson jdpatter...@gmail.com wrote: When you get the Request was aborted after waiting too long ... message there will be no stack trace because your code is never run. Rest assured you can run tasks for 30 seconds - I do it myself. Context listeners are run on every loading request so why do you say that splitting your code will not reduce start up time? Surely if there is less code to initialise it will take less time no? Could you post your log file of requests before and after the error? On 2 Mar 2010, at 00:17, Eugene Kuleshov wrote: John, I hear you, but I am quite certain that there is no other requests. It happen in a middle of the night when there is no users and the failing request is initiated by the GAE's own cron, so there is no refresh of the pages, nor any requests for css. With Spring framework, the most of the initialization happens in either startup servlet or context listener, so splitting application won't address the issue. Another problem is that request is terminated without providing any stack trace, so it is rather hard to debug issue on a live system. regards, Eugene On Mar 1, 12:10 pm, John Patterson jdpatter...@gmail.com wrote: Hi Eugene, All it takes are two requests to see that error - the first to start the application loading and then any other request (even a request for a css file or refreshing the page) will wait 10 seconds and then throw that exception. It is rare that a single page does not need more than one request. In my opinion this loading request problem is the biggest hidden gotcha that should be written in big red letters on the introduction page. It could end up requiring you to discard the frameworks you are accustomed to using. Something which helped me was to split my app into an admin version and a user facing client version. That reduced the loading time of the client version significantly. On 1 Mar 2010, at 23:35, Eugene Kuleshov wrote: John, My application is hardly used right now, so there is certainly NO other requests coming in. So, I still don't understand why execution is cut after 10 seconds instead of promised 30 seconds. With such limitation GAE for Java is practically making impossible to use the most popular web framework (i.e. Spring MVC + Spring Security + Spring Core), but I'd be interested to hear how you can replace such stack with something based on Guice. regards, Eugene On Feb 28, 11:55 pm, John Patterson jdpatter...@gmail.com wrote: You get this message when you app is still starting while other requests come in. The only current solution is to reduce start up time - pinging is not a satisfactory solution because you still get frequent loading requests. With Guice I was able to reduce star up by using a non AOP version which did no bytecode enhancement. Also, try delaying initialising components until they are needed. On 1 Mar 2010, at 08:45, Eugene Kuleshov wrote: I have Java application deployed on the appengine and it has several job definitions. However I see that Scheduled Tasks are aborted within 10 seconds from the start, even so corresponding FAQ entry states 30 seconds.http://code.google.com/appengine/docs/java/runtime.html#Quotas_and_Li ... This is a big problem for any applications using Springframework, which has startup time about 20 seconds. Here is corresponding entry from the log file for one of the executions of such scheduled task. --- 1. 02-28 02:45PM 39.147 /fetch.htm?... 500 10012ms 0cpu_ms 0kb See details 0.1.0.1 - - [28/Feb/2010:14:45:49 -0800] GET / fetch.htm?... HTTP/1.1 500 0 - - ipsc-stats.appspot.com 2. W 02-28 02:45PM 49.160 Request was aborted after waiting too long to attempt to service your request. Most likely, this
Re: [appengine-java] Re: lost sub entity
Did you look into default fetch group?
On 2 Mar 2010, at 01:04, Gunnar wrote:
Hi,
I followed Jakes advice to do e.setList(list) but no change.
I've also stepped through my code, but there is no exception!
Btw I use version 1.3.1 of the SDK.
Gunnar
On 1 mar, 15:28, John Patterson jdpatter...@gmail.com wrote:
It is unusual that you see no stack trace. Are you sure you are not
catching it? You could step through the code line by line to see
what
happens after the line with the problem.
Could this be something to do with setting the fetch group to
default? That seems to be the problem with a lot of peoples JDO
code :)
On 1 Mar 2010, at 21:19, Jake wrote:
If I recall, JDO is picky when it comes to being aware of changes
made
to a persisted object. For example, changing fields directly
(object.field = newValue;) doesn't work - you need to use a getter/
setter (object.setField(newValue);). Perhaps you are encountering
the
same issue here? Does the following type of thing work?
LIstSubEntity list = e.getMyList();
SubEntity first = list.remove(0);
list.add(first);
e.setMyList(list);
pm.makePersistent(e);
tx.commit();
Jake
On Feb 28, 11:05 am, Gunnar gunnar@gmail.com wrote:
Hi,
John and Karel, you are right about the placement of the commit
statement.
It worked in the test example because I only had one instance of
MyEntity.
I don't get any exception at all in the Eclipse console!
When I add a second instance of MyEntity if fails with Transaction
is
not active as expected.
Now I've changed the code in the try statement like this, but still
the first sub entity is lost and no exception is thrown!
(Of cause it would fail it the list is empty.)
ListMyEntity results = (ListMyEntity) query.execute();
if (results.iterator().hasNext()) {
tx.begin();
MyEntity e = results.iterator().next();
ListSubEntity list = e.getMyList();
SubEntity first = list.remove(0);
boolean ok = list.add(first);
if (!ok) {
System.err.println(could not add first);
}
System.out.println(list);
pm.makePersistent(e);
tx.commit();
}
On 28 Feb, 02:51, John Patterson jdpatter...@gmail.com wrote:
This should be throwing an exception. The JavaDocs for
Transaction.commit() say
Commits the transaction. Whether this call succeeds or fails, all
subsequent method invocations on this object will throw
IllegalStateException.
When something does not work as you expect the first place to look
is
the logs under your application console.
On 28 Feb 2010, at 05:25, Karel Alvarez wrote:
dont you get any exceptions stacktrace in the server console? it
would help... also you are calling commit() inside the for loop,
although the transactions is started only once... that would
crash
in the second iteration in a normal db server, I am not sure what
GAE does with it, in any case I dont think it is what you
intended...
On Sat, Feb 27, 2010 at 2:52 PM, Gunnar gunnar@gmail.com
wrote:
Hi,
I have problem with reordering a List.
I created a test with an entity called MyEntity which have a
ListSubEntity.
First I persist one instance of MyEntity with a list containing 3
SubEntity.
This works fine. Then I call a reorder servlet that moves the
first
SubEntity to the last position in the list.
The result is that the first SubEntity is lost and the datastore
only
contains 2 SubEntity instances.
What can be wrong?
Here is the reorder code:
package com.google.appengine.demo;
import java.io.IOException;
import java.util.List;
import javax.jdo.PersistenceManager;
import javax.jdo.Query;
import javax.jdo.Transaction;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@SuppressWarnings(serial)
public class ReorderServlet extends HttpServlet {
@SuppressWarnings(unchecked)
public void doGet(HttpServletRequest req,
HttpServletResponse
resp)
throws IOException {
PersistenceManager pm =
PMF.get().getPersistenceManager();
Query query = pm.newQuery(MyEntity.class);
Transaction tx = pm.currentTransaction();
try {
tx.begin();
ListMyEntity results = (ListMyEntity)
query.execute();
if (results.iterator().hasNext()) {
for (MyEntity e : results) {
ListSubEntity list =
e.getMyList();
SubEntity first =
list.remove(0);
boolean ok =
list.add(first);
if (!ok) {
System.err.println(could not add first);
}
System.out.println(list);
Re: [appengine-java] Re: Expires header automatically added (bug?)
Are you setting a cookie? We force an expires header for any requests that have a set-cookie header. The reason for this is that many users access websites using HTTP proxies. Some proxies will cache the entire request, which may cause session leak (e.g. let you read someone else's email). On Mon, Mar 1, 2010 at 7:09 AM, George Moschovitis george.moschovi...@gmail.com wrote: I don NOT want to set an Expires header. I am just curious with the header is added (and messes up with my caching scheme) -g. Well, if you do not like what GAE sets as Expires value, why not set yours? On Mar 1, 11:18 am, George Moschovitis george.moschovi...@gmail.com wrote: Could you provide some code please? What kind of code should I provide? I do NOT set the Expires header in my code, and still GAE automatically adds the Expires header. -g. -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- Ikai Lan Developer Programs Engineer, Google App Engine http://googleappengine.blogspot.com | http://twitter.com/app_engine -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
Re: [appengine-java] How to migrate data from an existing database to APP Engine?
You'll need to write a script that exports from your relational database and uploads using the bulk loader: http://code.google.com/appengine/docs/python/tools/uploadingdata.html Schemas won't map 1:1, so be sure you understand what changes you'll have to make to your persistence model before doing this. On Sun, Feb 28, 2010 at 7:50 PM, HugoMatus hugoomarma...@gmail.com wrote: Hi, I looked at APP Engine for the first time this weekend and understand clearly the steps to create a new application and persist new data to APP Engine. What I could not find an answer for is: How to migrate existing data from a relational database to APP Engine so that I can then migrate a small app that queries the data and allows user to modify or add new records? Thanks, HugoMatus -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- Ikai Lan Developer Programs Engineer, Google App Engine http://googleappengine.blogspot.com | http://twitter.com/app_engine -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
Re: [appengine-java] Re: Flash arcade game GAE based
Since you're using Flash, you won't need to use long polling. XMPP seems like the way to go here. On Mon, Mar 1, 2010 at 1:08 AM, Miguel maenguida...@gmail.com wrote: You can use Memcache: http://code.google.com/intl/en/appengine/docs/java/memcache/usingjcache.html On 28 feb, 08:58, Ahmed Khalifa derkhal...@gmail.com wrote: hi all, I am writing a multiplayer flash arcade game in actionscript .. i have discovered GAE recently and thought that it might be a very good choice for building and hosting my server .. however, i realize that arcade games need an almost realtime responsive capacity from the server .. besides the server has to be looping on receiving position object of Client A, storing it in a DB, Fetching Client B position object and sending it back .. this will result in a huge number of DB requests either storing, fetching or deleting which will quickly exhaust the CPU quota for the application .. So, I was wondering if any one had an idea or a reference to come around these two problems of real time response and CPU exhaustion by DB calls best regards, A. Khalifa -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- Ikai Lan Developer Programs Engineer, Google App Engine http://googleappengine.blogspot.com | http://twitter.com/app_engine -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Scheduled Tasks aborted early
On Mar 1, 1:19 pm, John Patterson jdpatter...@gmail.com wrote: The pasted log is a bit hard to read... but it looks to me like two requests. One at 02-28 02:45PM 39 and another at 02-28 02:45PM 49. Or is that just the way it printed? Just one request. That is how it looks in the log browser at the web UI. The idea is to split the app into different _versions_ not different apps. Then they use the same datastore but apart from that act almost like separate apps. In my situation my admin app takes care of all the loading and processing data - kicking off tasks etc. I see, it is an interesting, yet quite weird workaround. regards, Eugene -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
Re: [appengine-java] Re: Scheduled Tasks aborted early
On 2 Mar 2010, at 02:18, Eugene Kuleshov wrote: Just one request. That is how it looks in the log browser at the web UI. OK then could you post the logs surrounding that one request? Expanded. -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
Re: [appengine-java] Re: Scheduled Tasks aborted early
John, There was no requests more then 30 minutes before that one and more then 30 minutes after that. So, I don't think those requests would matter. Take care Eugene On Mon, Mar 1, 2010 at 2:24 PM, John Patterson jdpatter...@gmail.com wrote: On 2 Mar 2010, at 02:18, Eugene Kuleshov wrote: Just one request. That is how it looks in the log browser at the web UI. OK then could you post the logs surrounding that one request? Expanded. -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
Re: [appengine-java] Re: App Engine and Spring slow start up
Try using the old way with xml configuration for wiring your beans together. The word on the street is that Spring's component scanning takes a lot of time. luijar wrote: Nope, I am still seeing it. It's quite frustrating. I even tried to reduce Spring init time by removing schema validation from the application context init. But, that does not seem to work. I am using Spring annotations and component scanning to autowire my beans, I wonder if using plain XML configuration will make autowiring faster. On Feb 23, 9:14 pm, charming30 charmin...@gmail.com wrote: Has the above mentioned offline precompilatio in 1.3.1 been able to solve your issue, I plan to use Spring on Java for my Business App which is complex and could be based on SOA. Kindly let me know if your issue was resolved or reduced by using the above fix. On Feb 20, 12:05 am, luijar luis.j.aten...@gmail.com wrote: I believe my development environment was on 1.3.0. That might be something to look at, although it seems that probably it's a very small overhead, do you have any metrics that would give some evidence as to how much overhead is offline precompilation adding? Thanks On Feb 18, 2:04 pm, Don Schwarz schwa...@google.com wrote: Have you deployed your application with the 1.3.1 SDK? That release turned on offline precompilation by default, which is an optimization that may help. On Thu, Feb 18, 2010 at 7:59 AM, Alex chasov...@gmail.com wrote: Hi, It appeared that long init problem is well known for Grails users: http://jira.codehaus.org/browse/GRAILSPLUGINS-1736 I wasted couple of weeks to create app I cannot run. Hope that SpringSource and Google can solve the issue. On Feb 17, 7:41 pm, Stephan Hartmann hartm...@metamesh.de wrote: The problem is that the initialization of your app takes longer than 30 seconds. Pinging your app doesn't help when the app is restarted due to redeployment or maintenance, or when high traffic demands a second instance. You should try to reduce your startup time. regards, Stephan 2010/2/17 luijar luis.j.aten...@gmail.com Great, all of our projects areSpringenabled lol. But I guess it's good that we are not the only ones seeing this, hopefully it gets a little more visibility. We have a cron job (1 min) that tries to keep our application alive by hitting a URL, but it does not do a very good job. It's frustrating and we don't even have access to the 500 page to tell the user to retry or go somewhere else. On Feb 17, 11:21 am, oth other...@gmail.com wrote: Yes we have seen this problem a lot. Per our tests, an application becomes idle after a minute of non activity. So, the unfortunate reality is that you need to keep your app alive by simulating activity on it. Or go the nonSpringroute. Thanks On Feb 16, 4:14 pm, luijar luis.j.aten...@gmail.com wrote: Hello Google App Engine forum, We have been seeing ever since we deployed our applications (currently 3 of them) that when our application instances become idle (they have not been hit for x amount of seconds) subsequent requests return with a 500 response. Logs show a hard deadline exceeded error com.google.apphosting.runtime.HardDeadlineExceededError: This request (32306ebe63b71ab0) started at 2010/02/12 20:39:11.984 UTC and was still executing at 2010/02/12 20:39:41.225 UTC. at com.google.appengine.runtime.Request.process-32306ebe63b71ab0(Request.java) And the first line of the log message has the following : 02-12 12:39PM 14.088 javax.servlet.ServletContext log: InitializingSpringroot WebApplicationContext Question: Has anyone else seen this behavior? How long does it take for an application instance to become idle? Thanks -- You received this message because you are subscribed to the Google Groups Google App Engine forJava group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.comgoogle-appengine-java%2B unsubscr...@googlegroups.com google-appengine-java%2bunsubscr...@googlegroups.comgoogle-appengine-java%252bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- You received this message because you are subscribed to the Google Groups Google App Engine forJava group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.comgoogle-appengine-java%2B unsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- 0x2B | ~0x2b -- Hamlet -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more
Re: [appengine-java] logging not working this
What's your application ID? On Fri, Feb 26, 2010 at 7:00 AM, oceandrive rams...@gmail.com wrote: GAE logging is not working this morning? Anyone has the same issue. The last log for me was at 02-26 06:00AM 03.975. Thanks -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- Ikai Lan Developer Programs Engineer, Google App Engine http://googleappengine.blogspot.com | http://twitter.com/app_engine -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: lost sub entity
I don't jnow what you mean with look into default fetch group!.
Please explain.
Gunnar
On 1 mar, 19:20, John Patterson jdpatter...@gmail.com wrote:
Did you look into default fetch group?
On 2 Mar 2010, at 01:04, Gunnar wrote:
Hi,
I followed Jakes advice to do e.setList(list) but no change.
I've also stepped through my code, but there is no exception!
Btw I use version 1.3.1 of the SDK.
Gunnar
On 1 mar, 15:28, John Patterson jdpatter...@gmail.com wrote:
It is unusual that you see no stack trace. Are you sure you are not
catching it? You could step through the code line by line to see
what
happens after the line with the problem.
Could this be something to do with setting the fetch group to
default? That seems to be the problem with a lot of peoples JDO
code :)
On 1 Mar 2010, at 21:19, Jake wrote:
If I recall, JDO is picky when it comes to being aware of changes
made
to a persisted object. For example, changing fields directly
(object.field = newValue;) doesn't work - you need to use a getter/
setter (object.setField(newValue);). Perhaps you are encountering
the
same issue here? Does the following type of thing work?
LIstSubEntity list = e.getMyList();
SubEntity first = list.remove(0);
list.add(first);
e.setMyList(list);
pm.makePersistent(e);
tx.commit();
Jake
On Feb 28, 11:05 am, Gunnar gunnar@gmail.com wrote:
Hi,
John and Karel, you are right about the placement of the commit
statement.
It worked in the test example because I only had one instance of
MyEntity.
I don't get any exception at all in the Eclipse console!
When I add a second instance of MyEntity if fails with Transaction
is
not active as expected.
Now I've changed the code in the try statement like this, but still
the first sub entity is lost and no exception is thrown!
(Of cause it would fail it the list is empty.)
ListMyEntity results = (ListMyEntity) query.execute();
if (results.iterator().hasNext()) {
tx.begin();
MyEntity e = results.iterator().next();
ListSubEntity list = e.getMyList();
SubEntity first = list.remove(0);
boolean ok = list.add(first);
if (!ok) {
System.err.println(could not add first);
}
System.out.println(list);
pm.makePersistent(e);
tx.commit();
}
On 28 Feb, 02:51, John Patterson jdpatter...@gmail.com wrote:
This should be throwing an exception. The JavaDocs for
Transaction.commit() say
Commits the transaction. Whether this call succeeds or fails, all
subsequent method invocations on this object will throw
IllegalStateException.
When something does not work as you expect the first place to look
is
the logs under your application console.
On 28 Feb 2010, at 05:25, Karel Alvarez wrote:
dont you get any exceptions stacktrace in the server console? it
would help... also you are calling commit() inside the for loop,
although the transactions is started only once... that would
crash
in the second iteration in a normal db server, I am not sure what
GAE does with it, in any case I dont think it is what you
intended...
On Sat, Feb 27, 2010 at 2:52 PM, Gunnar gunnar@gmail.com
wrote:
Hi,
I have problem with reordering a List.
I created a test with an entity called MyEntity which have a
ListSubEntity.
First I persist one instance of MyEntity with a list containing 3
SubEntity.
This works fine. Then I call a reorder servlet that moves the
first
SubEntity to the last position in the list.
The result is that the first SubEntity is lost and the datastore
only
contains 2 SubEntity instances.
What can be wrong?
Here is the reorder code:
package com.google.appengine.demo;
import java.io.IOException;
import java.util.List;
import javax.jdo.PersistenceManager;
import javax.jdo.Query;
import javax.jdo.Transaction;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@SuppressWarnings(serial)
public class ReorderServlet extends HttpServlet {
�...@suppresswarnings(unchecked)
public void doGet(HttpServletRequest req,
HttpServletResponse
resp)
throws IOException {
PersistenceManager pm =
PMF.get().getPersistenceManager();
Query query = pm.newQuery(MyEntity.class);
Transaction tx = pm.currentTransaction();
try {
tx.begin();
ListMyEntity results = (ListMyEntity)
query.execute();
if (results.iterator().hasNext()) {
for (MyEntity e : results) {
ListSubEntity list =
e.getMyList();
[appengine-java] Re: App Engine and Spring slow start up
Thanks for the advice, I'll try that. On Mar 1, 2:31 pm, Rusty Wright rwright.li...@gmail.com wrote: Try using the old way with xml configuration for wiring your beans together. The word on the street is that Spring's component scanning takes a lot of time. luijar wrote: Nope, I am still seeing it. It's quite frustrating. I even tried to reduce Spring init time by removing schema validation from the application context init. But, that does not seem to work. I am using Spring annotations and component scanning to autowire my beans, I wonder if using plain XML configuration will make autowiring faster. On Feb 23, 9:14 pm, charming30 charmin...@gmail.com wrote: Has the above mentioned offline precompilatio in 1.3.1 been able to solve your issue, I plan to use Spring on Java for my Business App which is complex and could be based on SOA. Kindly let me know if your issue was resolved or reduced by using the above fix. On Feb 20, 12:05 am, luijar luis.j.aten...@gmail.com wrote: I believe my development environment was on 1.3.0. That might be something to look at, although it seems that probably it's a very small overhead, do you have any metrics that would give some evidence as to how much overhead is offline precompilation adding? Thanks On Feb 18, 2:04 pm, Don Schwarz schwa...@google.com wrote: Have you deployed your application with the 1.3.1 SDK? That release turned on offline precompilation by default, which is an optimization that may help. On Thu, Feb 18, 2010 at 7:59 AM, Alex chasov...@gmail.com wrote: Hi, It appeared that long init problem is well known for Grails users: http://jira.codehaus.org/browse/GRAILSPLUGINS-1736 I wasted couple of weeks to create app I cannot run. Hope that SpringSource and Google can solve the issue. On Feb 17, 7:41 pm, Stephan Hartmann hartm...@metamesh.de wrote: The problem is that the initialization of your app takes longer than 30 seconds. Pinging your app doesn't help when the app is restarted due to redeployment or maintenance, or when high traffic demands a second instance. You should try to reduce your startup time. regards, Stephan 2010/2/17 luijar luis.j.aten...@gmail.com Great, all of our projects areSpringenabled lol. But I guess it's good that we are not the only ones seeing this, hopefully it gets a little more visibility. We have a cron job (1 min) that tries to keep our application alive by hitting a URL, but it does not do a very good job. It's frustrating and we don't even have access to the 500 page to tell the user to retry or go somewhere else. On Feb 17, 11:21 am, oth other...@gmail.com wrote: Yes we have seen this problem a lot. Per our tests, an application becomes idle after a minute of non activity. So, the unfortunate reality is that you need to keep your app alive by simulating activity on it. Or go the nonSpringroute. Thanks On Feb 16, 4:14 pm, luijar luis.j.aten...@gmail.com wrote: Hello Google App Engine forum, We have been seeing ever since we deployed our applications (currently 3 of them) that when our application instances become idle (they have not been hit for x amount of seconds) subsequent requests return with a 500 response. Logs show a hard deadline exceeded error com.google.apphosting.runtime.HardDeadlineExceededError: This request (32306ebe63b71ab0) started at 2010/02/12 20:39:11.984 UTC and was still executing at 2010/02/12 20:39:41.225 UTC. at com.google.appengine.runtime.Request.process-32306ebe63b71ab0(Request.java) And the first line of the log message has the following : 02-12 12:39PM 14.088 javax.servlet.ServletContext log: InitializingSpringroot WebApplicationContext Question: Has anyone else seen this behavior? How long does it take for an application instance to become idle? Thanks -- You received this message because you are subscribed to the Google Groups Google App Engine forJava group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.comgoogle-appengine-java%2B unsubscr...@googlegroups.com google-appengine-java%2bunsubscr...@googlegroups.comgoogle-appengine-java%252bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- You received this message because you are subscribed to the Google Groups Google App Engine forJava group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.comgoogle-appengine-java%2B unsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- 0x2B | ~0x2b -- Hamlet -- You received this message
Re: [appengine-java] Re: lost sub entity
http://lmgtfy.com/?q=appengine+jdo+%22default+fetch+group%22
On 2 Mar 2010, at 02:50, Gunnar wrote:
I don't jnow what you mean with look into default fetch group!.
Please explain.
Gunnar
On 1 mar, 19:20, John Patterson jdpatter...@gmail.com wrote:
Did you look into default fetch group?
On 2 Mar 2010, at 01:04, Gunnar wrote:
Hi,
I followed Jakes advice to do e.setList(list) but no change.
I've also stepped through my code, but there is no exception!
Btw I use version 1.3.1 of the SDK.
Gunnar
On 1 mar, 15:28, John Patterson jdpatter...@gmail.com wrote:
It is unusual that you see no stack trace. Are you sure you are
not
catching it? You could step through the code line by line to see
what
happens after the line with the problem.
Could this be something to do with setting the fetch group to
default? That seems to be the problem with a lot of peoples JDO
code :)
On 1 Mar 2010, at 21:19, Jake wrote:
If I recall, JDO is picky when it comes to being aware of changes
made
to a persisted object. For example, changing fields directly
(object.field = newValue;) doesn't work - you need to use a
getter/
setter (object.setField(newValue);). Perhaps you are encountering
the
same issue here? Does the following type of thing work?
LIstSubEntity list = e.getMyList();
SubEntity first = list.remove(0);
list.add(first);
e.setMyList(list);
pm.makePersistent(e);
tx.commit();
Jake
On Feb 28, 11:05 am, Gunnar gunnar@gmail.com wrote:
Hi,
John and Karel, you are right about the placement of the commit
statement.
It worked in the test example because I only had one instance of
MyEntity.
I don't get any exception at all in the Eclipse console!
When I add a second instance of MyEntity if fails with
Transaction
is
not active as expected.
Now I've changed the code in the try statement like this, but
still
the first sub entity is lost and no exception is thrown!
(Of cause it would fail it the list is empty.)
ListMyEntity results = (ListMyEntity) query.execute();
if (results.iterator().hasNext()) {
tx.begin();
MyEntity e = results.iterator().next();
ListSubEntity list = e.getMyList();
SubEntity first = list.remove(0);
boolean ok = list.add(first);
if (!ok) {
System.err.println(could not add
first);
}
System.out.println(list);
pm.makePersistent(e);
tx.commit();
}
On 28 Feb, 02:51, John Patterson jdpatter...@gmail.com wrote:
This should be throwing an exception. The JavaDocs for
Transaction.commit() say
Commits the transaction. Whether this call succeeds or fails,
all
subsequent method invocations on this object will throw
IllegalStateException.
When something does not work as you expect the first place to
look
is
the logs under your application console.
On 28 Feb 2010, at 05:25, Karel Alvarez wrote:
dont you get any exceptions stacktrace in the server
console? it
would help... also you are calling commit() inside the for
loop,
although the transactions is started only once... that would
crash
in the second iteration in a normal db server, I am not sure
what
GAE does with it, in any case I dont think it is what you
intended...
On Sat, Feb 27, 2010 at 2:52 PM, Gunnar gunnar@gmail.com
wrote:
Hi,
I have problem with reordering a List.
I created a test with an entity called MyEntity which have a
ListSubEntity.
First I persist one instance of MyEntity with a list
containing 3
SubEntity.
This works fine. Then I call a reorder servlet that moves the
first
SubEntity to the last position in the list.
The result is that the first SubEntity is lost and the
datastore
only
contains 2 SubEntity instances.
What can be wrong?
Here is the reorder code:
package com.google.appengine.demo;
import java.io.IOException;
import java.util.List;
import javax.jdo.PersistenceManager;
import javax.jdo.Query;
import javax.jdo.Transaction;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@SuppressWarnings(serial)
public class ReorderServlet extends HttpServlet {
@SuppressWarnings(unchecked)
public void doGet(HttpServletRequest req,
HttpServletResponse
resp)
throws IOException {
PersistenceManager pm =
PMF.get().getPersistenceManager();
Query query = pm.newQuery(MyEntity.class);
Transaction tx = pm.currentTransaction();
try {
tx.begin();
ListMyEntity results =
(ListMyEntity)
query.execute();
if (results.iterator().hasNext()) {
for (MyEntity e : results) {
ListSubEntity list =
e.getMyList();
SubEntity first =
list.remove(0);
[appengine-java] Re: Spring MVC - File upload problem
Hi
my first solution i wrote isn't working any more. I had to add
beans = {
multipartResolver(is.hax.spring.web.multipart.StreamingMultipartResolver)
}
to /grails-app/conf/spring/resources.xml
Now it works again
@Markus: you can not use byte-arrays with google app engine. You have
to use blobs! See my previous solution.
I put the library in myApplication/lib
On 2 Feb., 03:08, Markus Paaso markus.pa...@gmail.com wrote:
Hi
I tried it with Grails 1.2.0 and app-engine plugin 0.8.8 but got just
an another error:
java.lang.NoClassDefFoundError: Could not initialize class
org.apache.commons.fileupload.disk.DiskFileItem
at org.apache.commons.fileupload.disk.DiskFileItemFactory.createItem
(DiskFileItemFactory.java:196)
at org.apache.commons.fileupload.FileUploadBase.parseRequest
(FileUploadBase.java:358)
at
org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest
(ServletFileUpload.java:126)
at
org.springframework.web.multipart.commons.CommonsMultipartResolver.parseRequest
(CommonsMultipartResolver.java:155)
my controller:
def imageInstance = new Image(imageParams)
def f = request.getFile('imageData')
imageInstance.imageData = f.getBytes()
Image.withTransaction {
if(imageInstance.save(flush:true)) {
flash.message = Image ${imageInstance.id} created
redirect(action:show,id:imageInstance.id)
}
else {
render(view:'create',model:[imageInstance:imageInstance])
}
}
and domain-class:
import javax.persistence.*;
// import com.google.appengine.api.datastore.Key;
@Entity
class Image implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
Long id
byte[] imageData
static constraints = {
id visible:false
}
}
It seems like the multipart resolver is not replaced with the new one.
I placed the jar file into myApplication/lib and GRAILS_HOME/lib
directories.
Maybe I didn't place the jar to the right directory?
Would you like to tell more about how you got it to work?
Markus
On 2 helmi, 00:00, Sebastian Cartier sebi.cart...@gmail.com wrote:
this works also for grails!
Add the library to your lib directory and add
bean id=multipartResolver
class=is.hax.spring.web.multipart.StreamingMultipartResolver
/bean
to your applicationContext.xml
For saving the image in a google blob i used the following functions:
@Persistent
Blob imageBlob
byte [] getImage(){
if(imageBlob){
imageBlob.getBytes()
}else{
null;
}
}
void setImage(byte [] imageBytes){
imageBlob = new Blob(imageBytes)
}
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Re: [appengine-java] Task queue not starting the action when expected
Tasks aren't guaranteed to execute immediately. Task queues execute when there is capacity: http://code.google.com/appengine/docs/python/taskqueue/overview.html#Task_Execution It may or may not be related to 1.3.1. What % of your requests see this delay? On Thu, Feb 25, 2010 at 3:05 PM, Jerome jerome.mou...@gmail.com wrote: Hello, We have been using task queues for a few months without problem. We handle actions that must execute right away. At the time of the release of 1.3.1, we noticed that sometimes, some tasks will take 1 to 2 minutes to start, but in the task queue, the ETA shows as a date in the past (like 0:01:12 ago), usually 1 second or so after the creation time. This is not a consistent issue. I might works perfectly (task being kicked in within 1 second of creation) for several times and suddenly, the next task takes 1.5 minutes to get started. Our task queue is empty when we see this issue. Our queue is setup with a max rate of 5/s and a bucket size of 1. Any idea of what we can do to work around or solve this new issue? Jerome -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- Ikai Lan Developer Programs Engineer, Google App Engine http://googleappengine.blogspot.com | http://twitter.com/app_engine -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
Re: [appengine-java] Defining composite indexes
That's challenging. If there's a finite set of possible property names, you can generate all these ahead of time using queries on your local datastore instance. If not, you may want to reconsider using the property name as metadata for exactly the reasons you mentioned. For properties that require composite indexing, you can use a key and value property with indexable values so composite indexing is possible. On Fri, Feb 26, 2010 at 1:02 AM, AGS Rest agsr...@gmail.com wrote: I use the low level App Engine data store API, as it gives me the flexibility of having defining schemas on the fly, as Entities on the app engine don't really need a schema. Normally, if i needed to define a composite index that is based on an Entity's property and its ancestor; i can do so by defining an index in datastore-indexes.xml (by configuration). However, as the name of the property in this case is / can be determined only during the creation of the Entity itself, how can i mark properties of the Entity on which i need the composite index to be created? Is there a hook in the Datastore API that i can take advantage of ? Any insight would be appreciated. -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- Ikai Lan Developer Programs Engineer, Google App Engine http://googleappengine.blogspot.com | http://twitter.com/app_engine -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Is there an equivalent of Python GeoModel project in Java?
I tried out the Java Geomodel http://code.google.com/p/javageomodel/
The query used in the example provided on the project page seems
strange to me. The example uses a ListString parameter (containing
the cells of the bounding box) and passes it to a query which filters
the ListString (geocells) property of the entity class. When I
execute that query I get following error: Collection parameters are
only supported when filtering on primary key.
Is it possible to have a query in appengine where the entity has a
ListString property (which is not a primary key) and you want to
know if that property contains one of the values provided by a second
ListString?
I'm also wondering if the resolution of the cells can be changed. The
results I get are inaccurate (I'm getting some false positives when I
do a bounding box search).
class GeoObject {
@Persistent
ListString geocells;
...
}
// Transform this to a bounding box
BoundingBox bb = new BoundingBox(latNE, lonNE, latSW, lonSW);
// Calculate the geocells list to be used in the queries (optimize
list of cells that complete the given bounding box)
ListString cells = Geocell.best_bbox_search_cells(bb, null);
// In Google App Engine, you'll have something like below. In
hibernate (or whatever else), it might be a little bit different.
String queryString = select from GeoObject where
geocellsParameter.contains(geocells);
Query query = pm.newQuery(query);
query.declareParameters(String geocellsParameter);
query.declareParameters(String geocellsP);
ListGeoObject objects = (ListGeoObject) query.execute(cells);
On Feb 8, 11:24 pm, Ikai L (Google) ika...@google.com wrote:
Looks like someone ported the Python code to Java for GeoHash:
http://stackoverflow.com/questions/2060219/google-app-engine-geohashing
Also seems like a pretty good explanation of GeoHashing in general.
On Thu, Feb 4, 2010 at 10:16 AM, mianor lefebvre.rom...@gmail.com wrote:
Hi,
I am trying to implement geolocation search with GAE in Java using
GeoPt.
But due to restrictions on Datastore, bounding box queries are also
not supported in App Engine because there need to be two inequalities
on two independent properties (latitude and longitude).
There seems to be a solution with Geohash but every thing I found is
based on GAE Python. Is there anything based on Java or can I use
Geomodel (http://code.google.com/p/geomodel/) from Python in my Java
applications?
Thanks for your help!
Romain
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Enginehttp://googleappengine.blogspot.com|http://twitter.com/app_engine
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[appengine-java] JPA 2.0 Support
JPA 2.0 Support. When -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
Re: [appengine-java] Re: Spring MVC - File upload problem
hi, i got a demo here.
http://hapeblog.appspot.com/blog.shtml?id=2002
On Tue, Mar 2, 2010 at 4:36 AM, Sebastian Cartier sebi.cart...@gmail.comwrote:
Hi
my first solution i wrote isn't working any more. I had to add
beans = {
multipartResolver(is.hax.spring.web.multipart.StreamingMultipartResolver)
}
to /grails-app/conf/spring/resources.xml
Now it works again
@Markus: you can not use byte-arrays with google app engine. You have
to use blobs! See my previous solution.
I put the library in myApplication/lib
On 2 Feb., 03:08, Markus Paaso markus.pa...@gmail.com wrote:
Hi
I tried it with Grails 1.2.0 and app-engine plugin 0.8.8 but got just
an another error:
java.lang.NoClassDefFoundError: Could not initialize class
org.apache.commons.fileupload.disk.DiskFileItem
at
org.apache.commons.fileupload.disk.DiskFileItemFactory.createItem
(DiskFileItemFactory.java:196)
at org.apache.commons.fileupload.FileUploadBase.parseRequest
(FileUploadBase.java:358)
at
org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest
(ServletFileUpload.java:126)
at
org.springframework.web.multipart.commons.CommonsMultipartResolver.parseRequest
(CommonsMultipartResolver.java:155)
my controller:
def imageInstance = new Image(imageParams)
def f = request.getFile('imageData')
imageInstance.imageData = f.getBytes()
Image.withTransaction {
if(imageInstance.save(flush:true)) {
flash.message = Image ${imageInstance.id} created
redirect(action:show,id:imageInstance.id)
}
else {
render(view:'create',model:[imageInstance:imageInstance])
}
}
and domain-class:
import javax.persistence.*;
// import com.google.appengine.api.datastore.Key;
@Entity
class Image implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
Long id
byte[] imageData
static constraints = {
id visible:false
}
}
It seems like the multipart resolver is not replaced with the new one.
I placed the jar file into myApplication/lib and GRAILS_HOME/lib
directories.
Maybe I didn't place the jar to the right directory?
Would you like to tell more about how you got it to work?
Markus
On 2 helmi, 00:00, Sebastian Cartier sebi.cart...@gmail.com wrote:
this works also for grails!
Add the library to your lib directory and add
bean id=multipartResolver
class=is.hax.spring.web.multipart.StreamingMultipartResolver
/bean
to your applicationContext.xml
For saving the image in a google blob i used the following functions:
@Persistent
Blob imageBlob
byte [] getImage(){
if(imageBlob){
imageBlob.getBytes()
}else{
null;
}
}
void setImage(byte [] imageBytes){
imageBlob = new Blob(imageBytes)
}
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Re: [appengine-java] Re: App Engine and Spring slow start up
i got the same problem too, there is no better way to resolve it, i just try to hitting a url with cron job. On Tue, Mar 2, 2010 at 3:50 AM, luijar luis.j.aten...@gmail.com wrote: Thanks for the advice, I'll try that. On Mar 1, 2:31 pm, Rusty Wright rwright.li...@gmail.com wrote: Try using the old way with xml configuration for wiring your beans together. The word on the street is that Spring's component scanning takes a lot of time. luijar wrote: Nope, I am still seeing it. It's quite frustrating. I even tried to reduce Spring init time by removing schema validation from the application context init. But, that does not seem to work. I am using Spring annotations and component scanning to autowire my beans, I wonder if using plain XML configuration will make autowiring faster. On Feb 23, 9:14 pm, charming30 charmin...@gmail.com wrote: Has the above mentioned offline precompilatio in 1.3.1 been able to solve your issue, I plan to use Spring on Java for my Business App which is complex and could be based on SOA. Kindly let me know if your issue was resolved or reduced by using the above fix. On Feb 20, 12:05 am, luijar luis.j.aten...@gmail.com wrote: I believe my development environment was on 1.3.0. That might be something to look at, although it seems that probably it's a very small overhead, do you have any metrics that would give some evidence as to how much overhead is offline precompilation adding? Thanks On Feb 18, 2:04 pm, Don Schwarz schwa...@google.com wrote: Have you deployed your application with the 1.3.1 SDK? That release turned on offline precompilation by default, which is an optimization that may help. On Thu, Feb 18, 2010 at 7:59 AM, Alex chasov...@gmail.com wrote: Hi, It appeared that long init problem is well known for Grails users: http://jira.codehaus.org/browse/GRAILSPLUGINS-1736 I wasted couple of weeks to create app I cannot run. Hope that SpringSource and Google can solve the issue. On Feb 17, 7:41 pm, Stephan Hartmann hartm...@metamesh.de wrote: The problem is that the initialization of your app takes longer than 30 seconds. Pinging your app doesn't help when the app is restarted due to redeployment or maintenance, or when high traffic demands a second instance. You should try to reduce your startup time. regards, Stephan 2010/2/17 luijar luis.j.aten...@gmail.com Great, all of our projects areSpringenabled lol. But I guess it's good that we are not the only ones seeing this, hopefully it gets a little more visibility. We have a cron job (1 min) that tries to keep our application alive by hitting a URL, but it does not do a very good job. It's frustrating and we don't even have access to the 500 page to tell the user to retry or go somewhere else. On Feb 17, 11:21 am, oth other...@gmail.com wrote: Yes we have seen this problem a lot. Per our tests, an application becomes idle after a minute of non activity. So, the unfortunate reality is that you need to keep your app alive by simulating activity on it. Or go the nonSpringroute. Thanks On Feb 16, 4:14 pm, luijar luis.j.aten...@gmail.com wrote: Hello Google App Engine forum, We have been seeing ever since we deployed our applications (currently 3 of them) that when our application instances become idle (they have not been hit for x amount of seconds) subsequent requests return with a 500 response. Logs show a hard deadline exceeded error com.google.apphosting.runtime.HardDeadlineExceededError: This request (32306ebe63b71ab0) started at 2010/02/12 20:39:11.984 UTC and was still executing at 2010/02/12 20:39:41.225 UTC. at com.google.appengine.runtime.Request.process-32306ebe63b71ab0(Request.java) And the first line of the log message has the following : 02-12 12:39PM 14.088 javax.servlet.ServletContext log: InitializingSpringroot WebApplicationContext Question: Has anyone else seen this behavior? How long does it take for an application instance to become idle? Thanks -- You received this message because you are subscribed to the Google Groups Google App Engine forJava group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.comgoogle-appengine-java%2bunsubscr...@googlegroups.comgoogle-appengine-java%2B unsubscr...@googlegroups.com google-appengine-java%2bunsubscr...@googlegroups.comgoogle-appengine-java%252bunsubscr...@googlegroups.com google-appengine-java%252bunsubscr...@googlegroups.comgoogle-appengine-java%25252bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- You received this message because you are subscribed to the Google
[appengine-java] multiple inserts/update/delete problem
hi, i have tried to insert multiple insert, using multiple pm.makePersistent calls, but exceprion always occurrs. exception thrown: javax.jdo.jdofataluserexception:illegal argument cant operate on multiple entity groups in a single transaction i wanted to try to do batch inserts. all of the entities should be successfully inserted because they are related to each other i also tried the pm.makePersistentAll but a single request to datastore is limited to 1mb. is there a workaround or am i doing it the wrong way? thanks -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
