[appengine-java] Re: raise limits for applications
Hello, Nice :) The google storage seems to be the most viable option for my needs to put aside the bigger content files (e.g. the third-party libraries) and reference them from the jnlp file. Unfortunatelly it is available only for U.S developers yet (which I am not). Anyway I've joined the waiting list. Blobstore could work, but then I have to write a custom jnlp-download servlet (what could be an interresting option too, I will have a new toy for few days). Thank you for your tip, it could solve the problem in future. btw: so far I found a temporary way around - to place the big libs into another could (Amazon S3) and reference them from my app, still in testing, but this way has a limitation - to make the libraries freely available on internet. But thank you for your quick response and good tips :) Regards Perun On 24 mar, 01:32, Ikai Lan (Google) ika...@google.com wrote: You should explore: - Blobstore:http://code.google.com/appengine/docs/java/blobstore/overview.html - Google storage:http://code.google.com/apis/storage/ There are other options for application distribution. Ikai Lan Developer Programs Engineer, Google App Engine Blog:http://googleappengine.blogspot.com Twitter:http://twitter.com/app_engine Reddit:http://www.reddit.com/r/appengine On Tue, Mar 22, 2011 at 7:17 AM, Perun Katana gabec@yahoo.com wrote: Hi all, I was thinking if there could be a way to raise the limits for applications. My contecern is, that I have a JNLP application with a nice bunch of libraries included (e.g. jasper reports, etc), which takes the application nicely over 10 MB. The application is built as a Netbeans RPC application, so there is a jnlp-servlet for downloading all necessary files. Unfortunatelly, such applications are rarely under 10 MB. The jnlp-servlet itself does not consume much memory (as far I know), so this is not a problem, To download all libraries may take a little processing time, traffic and request time (well, even for slow trafic I hope each library is downloaded in 30s), but that's why there is billing quota for I am willing to pay. I'd see the google apps as a nice platform to deploy web start applications too, but for bigger application there would be nice to raise request handler quotas too, even if it would be a payed service. I don't think a need a separate VPS instance running 24x7 just to download a jnlp application. The question is, if there is another solution or I'll have to work on getting the static libraries deployed somewhere else (not a bad ide too). Regards Perun -- 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.- Masquer le texte des messages précédents - - Afficher le texte des messages précédents - -- 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.
[appengine-java] Re: is it possible that repeated task executions happen in parallel ?
I asked this question a while back and didn't really get a definitive response. https://groups.google.com/d/topic/google-appengine/YRAK6lHV1XQ/discussion (that's the link groups is giving me, but I'm having trouble with it - title of the thread is 'Idempotence multiple task execution' if you want to search for it). Ikai's response sounded definitive - '*The same task should not be executed multiple times concurrently*'. But the subsequent discussion seemed to cast doubt on that statement and it was never cleared up. I have never seen it happen. The answer to this question makes a difference in how the idempotent contract is implemented - especially whether transactional semantics are required or not. That might sound trivial, but implementing a transaction has significant performance implications, and is not something you would do if you don't need to. I disagree that 'make it idempotent' is a sufficient answer to this question. It is reasonable to want to understand the constraints of the task queue and make implementation decisions on that basis. Cheers, Colin * * * * -- 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.
[appengine-java] NoResultException causes rollback transaction why?
guys
in my JPA code a NoResultException causes the transaction to be rollback.
i am using the spring txn manger but all JPA methods are @Transactional(
propagation=Propagation.NOT_SUPPORTED).
any help pls.
@Transactional( propagation=Propagation.NOT_SUPPORTED)
public void txnMethod( CollectionLong list) throws
ApplicationExecption{
for (IteratorLong iterator = list.iterator(); iterator.hasNext();)
{
Long fbId = iterator.next();
PositionUser user = null;
final Query query =
em.createNamedQuery(PositionUser.FIND_BY_FB_ID);
query.setParameter(facebookId, fbId);
try {
user = (PositionUser) query.getSingleResult();
}
catch (NoResultException e) {
log.info( error occured: + e.toString() );
}catch (NonUniqueResultException e) {
throw new ApplicationExecption(e);
}
if(user!= null) {
ListKey friends = user.getFriends();
PositionUser findUser = em.find(PositionUser.class,
friends.get(0));
findUser.getFriends().remove(user.getKey());
em.merge(findUser);
}
em.remove(user);
}
}
-lp
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[appengine-java] gae gwt - to serve compressed java script
It looks that app engine is not serving compressed contents. Is there something I need to configure? though it says that it does that automatically http://code.google.com/appengine/kb/general.html#compression I have application written in gwt and java scripts are served uncompressed from app engine as per Page Speed plugin of Chrome and FireFox. It suggests to enable compression. From Page Speed: Compressing ./4.cache.js could save 336.2KiB (77% reduction). From Live HTTP Headers plugin of Firefox: ./4.cache.js GET ./4.cache.js HTTP/1.1 Host: Website name User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv: 1.9.2.16) Gecko/20110319 Firefox/3.6.16 ( .NET CLR 3.5.30729) Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/ *;q=0.8 Accept-Language: en-gb,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 115 Proxy-Connection: keep-alive Referer: Website name If-None-Match: X3ERbg Cache-Control: max-age=0 HTTP/1.1 200 OK Via: 1.1 SRV-IE-GATEWAY Connection: Keep-Alive Proxy-Connection: Keep-Alive Transfer-Encoding: chunked Age: 598 Expires: Thu, 22 Mar 2012 11:44:33 GMT Date: Wed, 23 Mar 2011 11:44:33 GMT Content-Type: application/x-javascript Etag: X3ERbg Server: Google Frontend Cache-Control: public, max-age=31536000 May be I am wrong, but I am guessing that if app engine is serving compressed contents then in its response it will say something like Content-Encoding: gzip May be I am missing something, any suggestions to fix 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-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.
[appengine-java] Re: gae gwt - to serve compressed java script
Hi, It's depending on certain values in the header of the request: see http://code.google.com/appengine/docs/java/runtime.html#Responses regards didier On Mar 24, 11:46 am, pac parvez.chau...@gmail.com wrote: It looks that app engine is not serving compressed contents. Is there something I need to configure? though it says that it does that automatically http://code.google.com/appengine/kb/general.html#compression I have application written in gwt and java scripts are served uncompressed from app engine as per Page Speed plugin of Chrome and FireFox. It suggests to enable compression. From Page Speed: Compressing ./4.cache.js could save 336.2KiB (77% reduction). From Live HTTP Headers plugin of Firefox: ./4.cache.js GET ./4.cache.js HTTP/1.1 Host: Website name User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv: 1.9.2.16) Gecko/20110319 Firefox/3.6.16 ( .NET CLR 3.5.30729) Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/ *;q=0.8 Accept-Language: en-gb,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 115 Proxy-Connection: keep-alive Referer: Website name If-None-Match: X3ERbg Cache-Control: max-age=0 HTTP/1.1 200 OK Via: 1.1 SRV-IE-GATEWAY Connection: Keep-Alive Proxy-Connection: Keep-Alive Transfer-Encoding: chunked Age: 598 Expires: Thu, 22 Mar 2012 11:44:33 GMT Date: Wed, 23 Mar 2011 11:44:33 GMT Content-Type: application/x-javascript Etag: X3ERbg Server: Google Frontend Cache-Control: public, max-age=31536000 May be I am wrong, but I am guessing that if app engine is serving compressed contents then in its response it will say something like Content-Encoding: gzip May be I am missing something, any suggestions to fix 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-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.
[appengine-java] Re: gae gwt - to serve compressed java script
Hi Didier, Yes, I have looked into this. It says if request has gzip then app engine will supply compressed contents. So in this case request does have gzip i.e. Accept-Encoding: gzip,deflate But it looks that it still does not send compressed data. I am not sure what can I do to fix it. Thanks. On Mar 24, 11:56 am, Didier Durand durand.did...@gmail.com wrote: Hi, It's depending on certain values in the header of the request: seehttp://code.google.com/appengine/docs/java/runtime.html#Responses regards didier On Mar 24, 11:46 am, pac parvez.chau...@gmail.com wrote: It looks that app engine is not serving compressed contents. Is there something I need to configure? though it says that it does that automatically http://code.google.com/appengine/kb/general.html#compression I have application written in gwt and java scripts are served uncompressed from app engine as per Page Speed plugin of Chrome and FireFox. It suggests to enable compression. From Page Speed: Compressing ./4.cache.js could save 336.2KiB (77% reduction). From Live HTTP Headers plugin of Firefox: ./4.cache.js GET ./4.cache.js HTTP/1.1 Host: Website name User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv: 1.9.2.16) Gecko/20110319 Firefox/3.6.16 ( .NET CLR 3.5.30729) Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/ *;q=0.8 Accept-Language: en-gb,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 115 Proxy-Connection: keep-alive Referer: Website name If-None-Match: X3ERbg Cache-Control: max-age=0 HTTP/1.1 200 OK Via: 1.1 SRV-IE-GATEWAY Connection: Keep-Alive Proxy-Connection: Keep-Alive Transfer-Encoding: chunked Age: 598 Expires: Thu, 22 Mar 2012 11:44:33 GMT Date: Wed, 23 Mar 2011 11:44:33 GMT Content-Type: application/x-javascript Etag: X3ERbg Server: Google Frontend Cache-Control: public, max-age=31536000 May be I am wrong, but I am guessing that if app engine is serving compressed contents then in its response it will say something like Content-Encoding: gzip May be I am missing something, any suggestions to fix 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-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.
[appengine-java] Re: raise limits for applications
Hi, Ikai, Interactions between GAE apps and Blobstore are billed for storage + CPU. Google Storage is billed for storage + network + request count. How do the two compare in a real-world scenario from price/performance standpoint? It seems that Blobstore, being a core part of GAE, is regarded as local to your application, while Google Storage will be external and is therefore no different from Amazon S3 or Rackspace CloudFiles. There are also these URL Fetch 1mb-out/32mb-in limits, which seem to apply to everything. It's like we have a Titan 4 class rocket but we're only allowed to use a car engine to fly it. Cheers, Yegor On Mar 23, 6:32 pm, Ikai Lan (Google) ika...@google.com wrote: You should explore: - Blobstore:http://code.google.com/appengine/docs/java/blobstore/overview.html - Google storage:http://code.google.com/apis/storage/ There are other options for application distribution. Ikai Lan Developer Programs Engineer, Google App Engine Blog:http://googleappengine.blogspot.com Twitter:http://twitter.com/app_engine Reddit:http://www.reddit.com/r/appengine On Tue, Mar 22, 2011 at 7:17 AM, Perun Katana gabec@yahoo.com wrote: Hi all, I was thinking if there could be a way to raise the limits for applications. My contecern is, that I have a JNLP application with a nice bunch of libraries included (e.g. jasper reports, etc), which takes the application nicely over 10 MB. The application is built as a Netbeans RPC application, so there is a jnlp-servlet for downloading all necessary files. Unfortunatelly, such applications are rarely under 10 MB. The jnlp-servlet itself does not consume much memory (as far I know), so this is not a problem, To download all libraries may take a little processing time, traffic and request time (well, even for slow trafic I hope each library is downloaded in 30s), but that's why there is billing quota for I am willing to pay. I'd see the google apps as a nice platform to deploy web start applications too, but for bigger application there would be nice to raise request handler quotas too, even if it would be a payed service. I don't think a need a separate VPS instance running 24x7 just to download a jnlp application. The question is, if there is another solution or I'll have to work on getting the static libraries deployed somewhere else (not a bad ide too). Regards Perun -- 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-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.
[appengine-java] any where i can hire people to do development on app engine in singapore?
looking for competent developers -- 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.
[appengine-java] Prepared Query reuse ?
Hello, I'm developing the new version of Siena API (v1.0.0) and I'm integrating lots of new features coming from GAE. I have a stupid question: is a PreparedQuery reusable several times as its name could let it believe? Can I prepare a query and keep it and reuse it? Is it threadsafe? Thanks Pascal Voitot -- 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.
[appengine-java] Re: raise limits for applications
Hello Yegor, for my case the requests for large data are done from the client side, the application only refers them. In that point an external storage, objects with fixed URI are more feasible than passing data from blobstorage consuming CPU cycles, blobstorage api calls. Thank you for clearing it up. btw: the google storage is provided in U.S. datacenters only, what limits other developers to use the storage. But until it's an external storage it's doesn't matter who provides the space. Carpe diem Perun On 24. Mar., 15:51 h., Yegor yegor.jba...@gmail.com wrote: Hi, Ikai, Interactions between GAE apps and Blobstore are billed for storage + CPU. Google Storage is billed for storage + network + request count. How do the two compare in a real-world scenario from price/performance standpoint? It seems that Blobstore, being a core part of GAE, is regarded as local to your application, while Google Storage will be external and is therefore no different from Amazon S3 or Rackspace CloudFiles. There are also these URL Fetch 1mb-out/32mb-in limits, which seem to apply to everything. It's like we have a Titan 4 class rocket but we're only allowed to use a car engine to fly it. Cheers, Yegor -- 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.
Re: [appengine-java] Get User instance by email
If you have a property type User, I am pretty sure the property value is just the email address. It's actually better to store the userId you get via user.getUserId() since this is unique and does not change: http://code.google.com/appengine/docs/java/javadoc/ The email address is used because at the time we released the API, that's all we had, and now we can't make the change since we would break backwards compatibility. Ikai Lan Developer Programs Engineer, Google App Engine Blog: http://googleappengine.blogspot.com Twitter: http://twitter.com/app_engine Reddit: http://www.reddit.com/r/appengine On Mon, Mar 21, 2011 at 12:29 PM, Ido Ran ido@gmail.com wrote: Hi, I'm new to GAE so please be kind. I have an entity with persisted field of type User. I would like to have a registration page in which authenticated user can register, on that page I can get the User instance without problem from UserService. I also like to have an admin page from which I can manually register other users, the current user on those pages will be the admin: Is it possible to get a User instance based on email address? Thank you, Ido -- 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-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.
[appengine-java] Re: NoResultException causes rollback transaction why?
that previous example code was too complex... phew it was a late night
this a simpler example of the a method that does a rollback when a
NoResultException is thrown.
even if the exception is handled it doesnt matter the txn is rollback and no
commits are done.
if the NoResultException is NOT thrown the method commits correctly.
is this voodoo or something?
@Transactional( propagation=Propagation.NOT_SUPPORTED)
public void txnMethod( CollectionLong list) throws
ApplicationExecption{
for (IteratorLong iterator = list.iterator(); iterator.hasNext();)
{
Long fbId = iterator.next();
PositionUser user = null;
final Query query =
em.createNamedQuery(PositionUser.FIND_BY_FB_ID);
query.setParameter(facebookId, fbId);
try {
user = (PositionUser) query.getSingleResult();
}
catch (NoResultException e) {
log.info( error occured: + e.toString() );
}catch (NonUniqueResultException e) {
throw new ApplicationExecption(e);
}
if(user!= null) {
user.setAccuracy(5000);
em.merge(user);
}
}
}
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