Re: Heroku Spree Commerce + SOA

[Chandu]

Thanks David!

  1. If I have to create all the web services as a separate heroku apps,
  how would I share the database instance between the more than one
  services or apps like admin tools or crons?

 While sharing a database between apps isn't officially supported, you could
 have a way to expose an app's ENV['DATABASE_URL'] to other apps. This URL
 may change periodicially, so you'd want to make sure you had a way to
 reacquire the new one rather than hardcoding it.

 Another way to accomplish similar functionality is to expose the data you
 need as an API that is consumed by the other apps in your architecture.

I would prefer the API approach if the data set is NOT large in size.
ENV['DATABASE_URL']  approach doesn't seem very clean. I will have to
spend some time to explore these two.


 2. If the consumer facing web-app needs to call other services within

  the cloud to fulfill the request, do I have to use public address (may
  be using CNAME or whatever) or can I have it route it within the
  cloud?

 Requests would need to be made to the public address (via the domain name)
 as the hostname is what routes a request to a given site.

If I have to setup my own data center, I would create a network for
the production environment with firewall etc. And, the network would
have its own DNS/hostnames. Within that network if one app needs to
call a  service, the number of hops are limited to within the network.

In the heroku environment, if one app needs to call another service
within the environment using public address (via the domain name),
what would be the number of hops before it gets to the service. Would
it route within the cloud? I am just concerned about the performance
and security.


Thanks!
Chandra

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Heroku Spree Commerce + SOA

[Chandu]

Hi,

I am new to Heroku and Git as well. I don't have much experience
working with cloud environment but understand very well.

I've spent about a day on creating a new rails app in heroku and play
around with git to understand the deployment strategy etc. It took me
a while to understand how to manage different deployment environments.
I liked heroku but not convinced yet. At the end of my research on
heroku, I tried to deploy my blog site (built on rails 2.2.2) in
heroku and that took me just about 15mins. That was excellent :)

Currently, I am at the beginning stage of developing a commerce system
using Spree and the system is built on SOA approach. Most of the
services are NOT public facing but used internally withing the same
environment/network.

First of all, is heroku the best choice for me?

If I choose heroku as the platform, how do I go about? Below are my
questions,
1. If I have to create all the web services as a separate heroku apps,
how would I share the database instance between the more than one
services or apps like admin tools or crons?
2. If the consumer facing web-app needs to call other services within
the cloud to fulfill the request, do I have to use public address (may
be using CNAME or whatever) or can I have it route it within the
cloud?

I have a lot more questions but the correct answers to the above two
might even have answers to my other questions.


Thanks!

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