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Add dtrace probes to your Rack app.
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README.markdown

Rack::Probe : dtrace probes for your webapp

status

Rack::Probe (along with Dtracy) is part of the Ruby on Rail's Google Summer of Code '09 Quartet, with development updates and entertainment available at http://ecin.tumblr.com Welcome! Sit down, grab a sugary drink, and enjoy the smell of freshly baked code right out of the oven.

requirements

An operating system with support for Dtrace (http://www.sun.com/bigadmin/content/dtrace/) is a must. Mac OS X, Solaris/OpenSolaris and FreeBSD are all acceptable choices, though no testing has been done on FreeBSD.

gem dependencies

  • rack
  • ruby-dtrace

installing

gem sources -a http://gems.github.com

gem install ecin-rack-probe

setup

Rails Middleware:

Inside your config/environment.rb

config.gem "ecin-rack-probe", :lib => "rack/probe"

config.middleware.use "Rack::Probe"

Rack Middleware:

Inside your rackup file

require 'rack/probe' use Rack::Probe

use

From a terminal, run dtrace -n rack*::: -l to get a list of all the available probes. The number you'll see after 'rack' in the provider field is the PID of the process that's making the probes available.

copyright

Copyright (c) 2009 ecin. See LICENSE for details.

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