Class: RailsServerAnalytics::AnalyticsTracer

Inherits:
ActiveSupport::LogSubscriber
  • Object
show all
Defined in:
lib/rails_server_analytics/analytics_tracer.rb

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ AnalyticsTracer

Returns a new instance of AnalyticsTracer.



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# File 'lib/rails_server_analytics/analytics_tracer.rb', line 6

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rails_server_analytics/analytics_tracer.rb', line 10

def call(env)
  Rails.logger.info(color("Processing request in middleware", YELLOW)) 

  time_start = Time.now
  before_cpu = `ps -o %cpu= -p #{Process.pid}`.strip.to_f

  status, headers, response = @app.call(env)
  # request = ActionDispatch::Request.new env

  # data = {status:, headers:, response: response.body, request: request.body, time:}
  request_uri = env["REQUEST_URI"]
  request_method = env["REQUEST_METHOD"].downcase
  path_info = env["PATH_INFO"]
  ip = env["action_dispatch.remote_ip"].calculate_ip
  host = env["HTTP_HOST"]
  time_end = Time.now

  time_spent = time_end - time_start

  after_cpu = `ps -o %cpu= -p #{Process.pid}`.strip.to_f
  cpu_usage = after_cpu - before_cpu

  return [status, headers, response] if path_info.eql? "/analytics"

  analytics_data = JSON.pretty_generate({
    status:,
    headers:,
    request_uri:,
    request_method:,
    path_info:,
    ip:,
    host:,
    time_spent:,
    cpu_usage:,
  })

  analytics = Analytic.create(analytics_data:)

  Rails.logger.info(color("response data stored", GREEN)) 
  # write_data(data)

  [status, headers, response]
end

#write_data(data) ⇒ Object 



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# File 'lib/rails_server_analytics/analytics_tracer.rb', line 54

def write_data(data)
  json_path =
    if defined?(Rails)
      analytics_dir = File.join(Rails.root, "analytics_data/")
      FileUtils.mkdir_p(analytics_dir)[0] + "trace.json"
    end

  File.open(json_path, "w") do |f|
    f.write(JSON.pretty_generate(data))
  end
end