Class: Heroscale::Middleware
- Inherits:
-
Object
- Object
- Heroscale::Middleware
- Defined in:
- lib/heroscale/middleware.rb
Overview
simple Rack Middleware that adds a hook to return the heroku env info
Instance Method Summary collapse
- #call(env) ⇒ Object
-
#initialize(app) ⇒ Middleware
constructor
A new instance of Middleware.
Constructor Details
#initialize(app) ⇒ Middleware
Returns a new instance of Middleware.
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# File 'lib/heroscale/middleware.rb', line 5 def initialize(app) @app = app end |
Instance Method Details
#call(env) ⇒ Object
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# File 'lib/heroscale/middleware.rb', line 9 def call(env) if env["PATH_INFO"] == "/heroscale/status" queue_wait_time = env['HTTP_X_HEROKU_QUEUE_WAIT_TIME'] queue_depth = env['HTTP_X_HEROKU_QUEUE_DEPTH'] dynos_in_use = env['HTTP_X_HEROKU_DYNOS_IN_USE'] if queue_wait_time and queue_depth and dynos_in_use # format the response on heroku res = %|{"heroku": true, "queue_wait_time": #{queue_wait_time.to_i}, "queue_depth": #{queue_depth.to_i}, "dynos_in_use": #{dynos_in_use.to_i}}| else res = %|{"heroku": false}| end [ 200, {'Content-Type' => 'application/json'}, res] else @app.call(env) end end |