[google-appengine] GAE Remote API or GWT’s RequestFactory?

[Rafael Dipold]

Hi,

I want to build an software financial control that's uses infraestrutura of 
GAE to data and logic tier.
In the presentation tier I would like to use the JavaFX technology.
My doubt is with relation the comunication between the presentation and 
logic tier.
I read and tested two technology in a single CRUD app and both work's fine:


   - Remote API
   - GWT’s RequestFactory


The Remote API is more simple but I'm not sure if I understand the best use 
for this toolset. I read in Nick Johnson blog's that is intended purely for 
administrative access, but it work's fine in a single CRUD test that I 
created.
What technology you advises to build data-oriented (CRUD) software like I 
described??

Second question is with the fact that's in my country there are a federal 
law that forces the offline access of any software that's issue receipt for 
sale to consumers. 

There are anyway to do with that there are replication/synchronization 
between a local db like mysql and the datastore in GAE infrastruture?
I read about AppRocket <https://github.com/k7d/approcket/wiki/> but I'm not 
sure if this delivers what it promises. Anybody has a suggestion about this?

I'm open to new ideas and appreciate any sugestion.

Kind regards,

Rafael Dipold <https://github.com/k7d/approcket/wiki/>

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[google-appengine] Re: Java instance startup time out of control

[Rafael Dipold]

Some Tips and Tricks:

http://turbomanage.wordpress.com/2010/03/26/appengine-cold-starts-considered/
http://www.listry.com/blog/2010/03/google-app-engine-cold-start-guide-for
http://www.small-improvements.com/app-engine-performance-tuning

and that's all :)

Em sábado, 16 de junho de 2012 18h56min33s UTC-3, Jeff Schnitzer escreveu:
>
> We're having a big problem with instance startup time.  It varies 
> between 20s and 60+ seconds, and lately it's tending towards the high 
> end.  We're starting to experience downtime because instances get 
> deadlined before they go active. 
>
> This app is well optimized for GAE.  There's no classpath scanning and 
> it doesn't try to eagerly load data.  On a good day it starts in 
> 20s... so at this point there's not really much I can do. 
>
> I have a cron task that performs a db cleanup once a minute, and since 
> crons can run over 60s I can eventually get one instance started, 
> which is enough to serve traffic at the moment.  But at this point I 
> can no longer deploy code over old versions because the appserver 
> restart will fail. 
>
> Please help. 
>
> Jeff 
>

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[google-appengine] Re: Java instance startup time out of control

[Rafael Dipold]

Hi Jeff,

I'm not so experienced with GAE like you (less than 1 year), but I would 
try to make my contribution.

I have found in recent tests that Guice is a great villain of startup time. 
The Guice execute a bytecode generator (com.google.inject.internal.BytecodeGen 
newFastClass) classes for each startup and increases the start time by up 
to 13 seconds (only the Guice!!).

Then I change my project to use PicoContainer instead of Guice and my 
startup decreased 11-12 seconds!

Today I use Vraptor framework (http://vraptor.caelum.com.br/en) + 
PicoContainer + Objectify 4 with classpath scanning and my startup is in 
average 5 seconds. 

Follow my jars lib (34Mb):

appengine-api-1.0-sdk-1.6.6.jar
appengine-api-labs-1.6.6.jar
appengine-jsr107cache-1.6.6.jar
commons-fileupload-1.2.1.jar
commons-io-1.3.2.jar
gmultipart.jar
guava-r07.jar
hamcrest-all-1.2RC3.jar
iogi-0.9.1.jar
javassist-3.14.0.GA.jar
json-20090211.jar
jsr107cache-1.1.jar
log4j-1.2.16.jar
mirror-1.5.1.jar
objectify-4.0a3.jar
paranamer-2.2.jar
picocontainer-2.13.6.jar
scannotation-1.0.3.jar
slf4j-api-1.6.1.jar
slf4j-log4j12-1.6.1.jar
vraptor-3.4.1.jar
vraptor-gae.jar
xstream-xstream-1.3.2-SNAPSHOT-GAE.jar  

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[google-appengine] Backend instance at custom domain

[Rafael Dipold]

I was unable to access my backend instance at custom domain. 

For example, I have a backend name=test and I accessed backend instance 
successfully at:

http://test.[my_app_id].appspot.com

I 
configured
 
the 
wildcard
 
"test" in Google Apps (same config of "www"), But request at:

http://test.[my_domain].com

redicted to the frontend instance instead of backend instance.

What I do wrong or is it a GAE bug?

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[google-appengine] java.lang.RuntimeException: Class file too large!

[Rafael Dipold]

I have an java app that's contains a enum class with about 500Kb.

My app works fine since the last deployment there are approximately for 2 
months ago.

But since yesterday, I get the error when the objectify try register entity 
class  that refers to this enum:

java.lang.RuntimeException: Class file too large!

What's going on and why only now?

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Re: [google-appengine] java.lang.RuntimeException: Class file too large!

[Rafael Dipold]

Hi Takashi,

Thanks for your quick reply.

I opened an 
issue: http://code.google.com/p/googleappengine/issues/detail?id=8514

But I worry about the historic delay from Google in resolving issues 
anyway thanks for your attention!

Best regards,

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[google-appengine] Re: GAE SDK Release announcements ???

[Rafael Dipold]

The betting exchanges are paying 1:1 that the version 2.0.0 will support 
Dart language

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[google-appengine] The Future of Java and Python on GAE

[Rafael Dipold]

I leave it to you commenting on:

http://www.pcworld.com/article/2938352/some-google-app-engine-languages-may-not-get-updates.html




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Re: [google-appengine] The Future of Java and Python on GAE

[Rafael Dipold]

Sorry if I bored you Jeff, but not everyone has close ties with Google like 
you to know what future directions of this tool.

I follow the forum since 2011 and I have not seen this issue be discussed 
"countless times already" as you said.

There is an environment of uncertainty, because version 1.9 has been going 
on since feb/14 and there are only rumors about what comes next.

Em sexta-feira, 17 de julho de 2015 02:52:46 UTC-3, Jeff Schnitzer escreveu:
>
> Article says nothing that hasn't been said in this forum countless times 
> already. Clickbait title with zero interesting content. Boring.
>
> Jeff
>
> On Thu, Jul 16, 2015 at 10:23 AM, Rafael Dipold  > wrote:
>
>>
>> I leave it to you commenting on:
>>
>>
>> http://www.pcworld.com/article/2938352/some-google-app-engine-languages-may-not-get-updates.html
>>
>>
>>
>>
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>> .
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>> To view this discussion on the web visit 
>> https://groups.google.com/d/msgid/google-appengine/037b2dd2-08e0-49b1-bd6a-ecca75e34b6c%40googlegroups.com
>>  
>> <https://groups.google.com/d/msgid/google-appengine/037b2dd2-08e0-49b1-bd6a-ecca75e34b6c%40googlegroups.com?utm_medium=email&utm_source=footer>
>> .
>> For more options, visit https://groups.google.com/d/optout.
>>
>
>

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