class ZipkinTracer::Application

Useful methods on the Application we are instrumenting

Public Class Methods

config(app) click to toggle source
# File lib/zipkin-tracer/application.rb, line 41
def self.config(app)
  if app.respond_to?(:config) && app.config.respond_to?(:zipkin_tracer)
    app.config.zipkin_tracer
  else
    {}
  end
end
logger() click to toggle source
# File lib/zipkin-tracer/application.rb, line 33
def self.logger
  if defined?(Rails.logger)
    Rails.logger
  else
    Logger.new(STDOUT)
  end
end
routable_request?(env) click to toggle source

Determines if our framework knows whether the request will be routed to a controller

# File lib/zipkin-tracer/application.rb, line 5
def self.routable_request?(env)
  return true unless defined?(Rails) # If not running on a Rails app, we can't verify if it is invalid
  path_info = env[ZipkinTracer::RackHandler::PATH_INFO] || ""
  http_method = env[ZipkinTracer::RackHandler::REQUEST_METHOD]
  Rails.application.routes.recognize_path(path_info, method: http_method)
  true
rescue ActionController::RoutingError
  false
end
route(env) click to toggle source
# File lib/zipkin-tracer/application.rb, line 22
def self.route(env)
  return nil unless defined?(Rails)
  req = Rack::Request.new(stub_env(env))
  # Returns a string like /some/path/:id
  Rails.application.routes.router.recognize(req) do |route|
    return route.path.spec.to_s
  end
rescue
  nil
end
stub_env(env) click to toggle source
# File lib/zipkin-tracer/application.rb, line 15
def self.stub_env(env)
  {
    "PATH_INFO" => env[ZipkinTracer::RackHandler::PATH_INFO].dup,
    "REQUEST_METHOD" => env[ZipkinTracer::RackHandler::REQUEST_METHOD].dup
  }
end