Thanks guys for the answer.

So this will be the scenario
Ruby on Rails (on hosting site) <-> internet (push/pull) (REST) <->
python in Google App Engine.

I think you nail the question why I want to use Ruby on Rails on the
front end because I feel "app engine java" is not that reliable yet.
At the same time Ruby On Rails on the hosting give me a lot of
flexibility. By putting certain type of data in Google App Engine, it
will be standard for all other devices that need to access that set of
data. Like from Android, blackberry, iphone, etc.

One of the problem that might come out is data sync from hosting site
and Google App Engine site.

What do you think? or what other possible issues that might come out
with this scenario?

Thanks,
John

On Feb 22, 2:34 pm, Locke <[email protected]> wrote:
> If what you're saying is that you want to use appengine to host web
> services (REST or some dialect of XML) then my answer is: sure, go
> ahead, so long as you use Python. In my experience, appengine's java
> support is unreliable: simple java apps are occasionally killed for
> "excessive latency," and sometimes they just load really slowly.
>
> And if you want to implement your web services in JRuby, you have the
> same problems with java, but to a greater degree (as jruby is
> essentially a really big java library).
>
> So: either use Python or wait to see if google adds support to keep
> Java apps loaded.
>
> On Feb 22, 12:47 pm, John777 <[email protected]> wrote:
>
> > Hi,
>
> > I am planning to use Ruby on Rails on other hosting site and push/pull
> > some of data to/from Google App Engine. Do you guys think it is a good
> > idea?
>
> > Thanks,
> > John

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