Sinatra/Rails: Persisting custom class instances during app lifetime

Posted by knoopx on Stack Overflow See other posts from Stack Overflow or by knoopx
Published on 2010-04-24T18:01:17Z Indexed on 2010/04/24 18:03 UTC
Read the original article Hit count: 216

Filed under:

rails

|

sinatra

|

application-lifecycle

|

object-sharing

Can I assert rails/sinatra apps are initialized only once and all requests share the same app instance? or do new requests spawn new app instances?

Is it possible to instance custom classes and persist them during app lifetime without using sessions, database storages or third party services? If so, what are the implications from a thread-safeness point of view?

I'm trying to figure how to implement a web-based download manager and I'm currently evaluating ruby-based frameworks.

© Stack Overflow or respective owner

Related posts about rails

Ruby on Rails: url_for :back leads to NoMethodError for back_url

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi all, I'm trying to use url_for(:back) to create a redirect leading back to a previous page upon a user's logging in. I've had it working successfully for when the user just goes to the login page on his or her own. However, when the user is redirected to the login page due to accessing a page… >>> More
Why am I getting "ArgumentError: wrong number of arguments (1 for 0)" when running my rails function

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm stumped on what's causing this. I get this error and stack trace in all my functional tests where I call 'post'. Here is the full stack trace: 7) Error: test_should_validate(UsersControllerTest): ArgumentError: wrong number of arguments (1 for 0) /Users/hisham/src/rails/ftuBackend/vendor/rails/actionpack/lib/action_controller/routing/route… >>> More
Spork servers super slow (>3m) to start for RSpec & Cucumber BDD

as seen on Stack Overflow - Search for 'Stack Overflow'
I recently installed a fresh development setup on my laptop and now notice that my instances of spork take several minutes to start up. This is also most likely of the RSpec and Cucumber tests start up times running super slow. I ran in diagnostic mode with the -d flag and received the output below… >>> More
trying to convert rails 2.3.4 app to rails 3 but views not appearing

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a simple rails 2.3.4 application I am trying to get running with rails 3.0.0-beta2. I have the server running and all my links and navigation showing, however for some reason the content of my views is not displaying. When I navigate to Site/index the html in my index.html.erb in my site… >>> More
Create new Rails project with previews rails version

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, The latest version of rails installed on my mac is 3.0.0.beta gem list returns rails (3.0.0.beta, 2.3.5, 2.3.4, 2.3.2, 2.2.2, 1.2.6) I want to create a new project using version 2.3.5 So I run: rails _2.3.5_ myProject But it returns the following error $ rails _2.3.5_ photosbackup /Library/Ruby/Site/1… >>> More

Related posts about sinatra

Sinatra and XML POST request

as seen on Stack Overflow - Search for 'Stack Overflow'
I don't know is it my mistake or no. So i have that code: <code> post '/singin/get_token' do content_type :xml puts request.body.read puts xmlRequest xmlRequest = REXML::Document.new(request.body.read) ... </code> And when i post something like that: <code> <?xml… >>> More
Why is this RMagick call generating a segmentation fault?

as seen on Stack Overflow - Search for 'Stack Overflow'
I've been banging my head against the wall for the better part of an hour trying to figure out what's going wrong here, and I'm sure (or rather hoping) it's something fairly obvious that I'm overlooking. I'm using Ruby 1.9.1, Sinatra 1.0, and RMagick 2.13.1. ImageMagick and RMagick are correctly installed… >>> More
Error in requiring Sinatra gem

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm having a hard time getting Sinatra running on my local setup, Ubuntu Karmic 9.10. The error getting thrown when I have require 'sinatra' is: NoMethodError: undefined method `[]' for nil:NilClass from /usr/local/lib/ruby/gems/1.8/gems/sinatra-1.0/lib/sinatra/base.rb:891:in `compile' from /usr/local/lib/ruby/gems/1… >>> More
Why do I get this error when I try to push my SQLite3 to Postgresql (via Taps) on Cedar Stack?

as seen on Stack Overflow - Search for 'Stack Overflow'
I've done quite a bit of research on Heroku Dev Center and I am now looking to the community for help. Here is my problem. I can not push my db to Heroku Cedar Stack. I am trying to migrate a sqlite database to postgresql via Taps gem. When I am ready to deploy I run: bundle install --without production heroku… >>> More
Resque Runtime Error at /workers: wrong number of arguments for 'exists' command

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm having a runtime errror when i'm looking at the "workers" tab on resque-web (localhost). Everything else works. Edit: when this error occurs, i also have some (3 or 4) unknown workers 'not working'. I think they are responsible for the error but i don't understand how they got here Can you help… >>> More