Rear can run in standalone mode or can be integrated/mounted into any Espresso application.

Running a standalone application:

$ cat config.ru

require 'rear'

# model
class Page < ActiveRecord::Base
  # ...
end

# controller
Rear.register Page do
  # some setups, if any
end

run Rear

Then $ rackup -s ServerName -p PortNumber to start it.

Integrating Rear into existing Espresso application:

# models
class Page < ActiveRecord::Base
  # ...
end

# backend controllers
Rear.register Page

# frontend controllers
module Frontend
  class Pages < E
    map '/'
    # ...
  end
end

# Espresso application
app = E.new

# mounting frontend controllers into root URL
app.mount Frontend, '/'

# mounting backend controllers into /admin URL
app.mount Rear.controllers, '/admin'

# starting app
app.run :server => ServerName, :port => PortNumber

So basically mount Rear.controllers wherever you need.

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