Class: RailsMemoryProfiler::Middleware

Inherits:

Object

• Object
• RailsMemoryProfiler::Middleware

Defined in:

lib/rails_memory_profiler/middleware.rb

Overview

Rack middleware that profiles each request and pushes a report into ReportStore. Registered automatically by the Engine initializer; you do not need to add it to the middleware stack manually.

Profiling is skipped when:

• Configuration#enabled is false

• the request path matches Configuration#ignore_paths or the engine mount path

• the request is not selected by Configuration#sample_rate

Instance Method Summary

• #call(env) ⇒ Array

  Profiles the request if applicable and delegates to the inner app.

• #initialize(app) ⇒ Middleware constructor

  A new instance of Middleware.

Constructor Details

#initialize(app) ⇒ Middleware

Returns a new instance of Middleware.

Parameters:

• app (#call) —

  the next Rack application in the stack

# File 'lib/rails_memory_profiler/middleware.rb', line 12

def initialize(app)
  @app            = app
  @request_count  = 0
  @detailed_count = 0
  @mutex          = Mutex.new
end

Instance Method Details

#call(env) ⇒ Array

Profiles the request if applicable and delegates to the inner app.

Parameters:

• env (Hash) —

  Rack environment

Returns:

• (Array) —

  Rack response triplet

# File 'lib/rails_memory_profiler/middleware.rb', line 23

def call(env)
  return @app.call(env) unless RailsMemoryProfiler.config.enabled
  return @app.call(env) if ignored_path?(env["PATH_INFO"])
  return @app.call(env) unless sample?

  profile(env)
end