Class: ZipkinTracer::Application

Inherits:
Object
  • Object
show all
Defined in:
lib/zipkin-tracer/application.rb

Overview

Useful methods on the Application we are instrumenting

Class Method Summary collapse

Class Method Details

.config(app) ⇒ Object 



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# 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 ⇒ Object 



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# 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) ⇒ Boolean

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

Returns:

  • (Boolean) 


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# 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) ⇒ Object 



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# 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) ⇒ Object 



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# 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