Monday, August 4, 2014
I have a ruby script which instruments Net::HTTP requests in Rails applications. This works as follows: When Ruby loads the Net::HTTP class, I alias the request method. At every http request, my instrumented method gets executed. So that this works, I need to execute my script BEFORE ruby loads the standard library and BEFORE Rails gets loaded. So I need the earliest possible point in Rails where I can require my instrumentation script.
-- I tried the following locations:
- config/preinitializer.rb -> too late because Net::HTTP got already loaded
- config/application.rb -> also too late for the same reason
- I put my instrumentation script at the top of the Gemfile. So that my Gemfile looks like this:
require "myinstrumentationscript"
source 'https://rubygems.org'
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.1.1'
# Use sqlite3 as the database for Active Record
gem 'sqlite3'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 4.0.3'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .js.coffee assets and viewsgem 'coffee-rails', '~> 4.0.0'
This solution works not bad, but has some drawbacks:
- When I do "bundle install" or "bundle update" my script gets executed. But I want my script only run before Rails gets initialized.
- The bigger problem: This solution seems only to work in Rails 4. I get at least a Gemfile error in Rails 2.
So I need another location where I can load my instrumentation script.
Any help is very appreciated.
You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group.
To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscribe@googlegroups.com.
To post to this group, send email to rubyonrails-talk@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/5d88b212-c057-41c5-9807-6d1255233668%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment