Re: App Engine supports Java
Re: App Engine supports Java
- Subject: Re: App Engine supports Java
- From: Q <email@hidden>
- Date: Thu, 9 Apr 2009 07:20:23 +1000
On 09/04/2009, at 3:42 AM, Anjo Krank wrote:
Dunno... basically BigTable is the same as Amazons SimpleDB: a loose
property store with no relations in it. You can model them with some
tricks, though. But it still doesn't make that good of a match with
EOF.
I'd rather wonder how they run their "servlets"? Can they keep
state? How?
According to the docs[1], there is no request routing to any known
instance, user requests can go to any available instance. So you need
to be totally stateless on the server, which pretty much eliminates a
lot of WO from being used. I suspect they expect you to use something
like GWT to maintain state in the client and then use app engine as a
stateless service provider backend. From my limited testing it appears
they do support the use of session attributes.
[1] http://code.google.com/appengine/docs/java/runtime.html#Requests_and_Servlets
Cheers, Anjo
Am 08.04.2009 um 19:30 schrieb David Holt:
I found this little snippet from way back in 03:
Damon Clinkscales's "Object Persistence Approaches" presentation
further compared JDO and EJB with WebObjects's Enterprise Objects
Framework (EOF). EOF is a third-party object persistence framework
library owned by Apple and provides the technology behind the Apple
e-commerce Website. Since EOF is a pure Java library, it does not
require complex containers (EJB) or byte code post-processors
(JDO). EOF provides access to the generated raw SQL, and adaptors
can provide access to nonrelational datastores. However, EOF is a
nonstandard vendor-specific technology. It requires the developer
to learn the proprietary API and creates vendor lock-in.
http://www.javaworld.com/javaworld/jw-03-2003/jw-0314-nfjs.html?
page=3
So it sounds like a specific adaptor will have to be created for
the Google Datastore?
On 8-Apr-09, at 9:50 AM, Guido Neitzer wrote:
On 8. Apr. 2009, at 07:34 , Anjo Krank wrote:
http://googleappengine.blogspot.com/
WO in the cloud, anyone?
Hmmm. I guess that could be really interesting if there were an
EOF integration for JDO. Will have to look into that. It's
definitely an interesting option.
cug
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Webobjects-dev mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Webobjects-dev mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
@krank.net
This email sent to email@hidden
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Webobjects-dev mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden
--
Seeya...Q
Quinton Dolan - email@hidden
Gold Coast, QLD, Australia (GMT+10)
Ph: +61 419 729 806
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Webobjects-dev mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden