Class: BoringMetrics::Rails::Middleware

Inherits:
Object
  • Object
show all
Defined in:
lib/boringmetrics-rails/middleware.rb

Overview

Rack middleware for BoringMetrics

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Middleware

Returns a new instance of Middleware.



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# File 'lib/boringmetrics-rails/middleware.rb', line 7

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/boringmetrics-rails/middleware.rb', line 11

def call(env)
  start_time = Time.now

  # Process the request
  begin
    status, headers, response = @app.call(env)
    [status, headers, response]
  rescue StandardError => e
    # Log the exception if BoringMetrics is initialized
    if defined?(BoringMetrics.client) && BoringMetrics.client
      BoringMetrics.logs.send(
        type: "log",
        level: "error",
        message: e.message,
        data: {
          exception: e.class.name,
          backtrace: e.backtrace&.first(10),
          path: env["PATH_INFO"],
          method: env["REQUEST_METHOD"]
        }
      )
    end
    raise e
  ensure
    # Log request metrics if BoringMetrics is initialized
    if defined?(BoringMetrics.client) && BoringMetrics.client
      duration = ((Time.now - start_time) * 1000).round(2) # in milliseconds

      # Update live metric for request duration
      BoringMetrics.lives.update(
        liveId: "request_duration",
        value: duration,
        operation: "set"
      )
    end
  end
end