Class: AliveState::Middleware

Inherits:
Object
  • Object
show all
Defined in:
lib/alive_state/middleware.rb

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Middleware

Returns a new instance of Middleware.



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# File 'lib/alive_state/middleware.rb', line 3

def initialize(app)
  @app = app
end

Instance Method Details

#alive_state_call(env, format) ⇒ Object 



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# File 'lib/alive_state/middleware.rb', line 17

def alive_state_call(env, format)
  format ||= AliveState.config.format

  status = 200
  params = { 'Content-Type' => 'text/plain; charset=utf-8' }
  raw = {
    state: :green,
    observed_at: Time.current.to_s,
    version: AliveState::Info.version_format,
    application: {}
  }

  AliveState.applications.each do |application|
    raw[:application][application.name] = application.alive?
  end

  raw[:application].keys.each do |key|
    unless raw[:application][key]
      raw[:state] = :red
      break
    end
  end

  case format
  when 'json'
    body = raw.to_json
    params = { 'Content-Type' => 'application/json' }
  when 'xml'
    body = raw.to_xml
    params = { 'Content-Type' => 'application/xml' }
  else
    body = raw.to_s
  end

  [status, params, [body]]
end

#call(env) ⇒ Object 



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# File 'lib/alive_state/middleware.rb', line 7

def call(env)
  path, format = env['PATH_INFO'].split('.')
  case path
  when /^\/#{AliveState.config.path}/
    alive_state_call(env, format)
  else
    @app.call(env)
  end
end