class Sentry::Rails::Tracing::ActiveRecordSubscriber

def subscribe!
  record_query_source = SUPPORT_SOURCE_LOCATION && Sentry.configuration.rails.enable_db_query_source
  query_source_threshold = Sentry.configuration.rails.db_query_source_threshold_ms
  subscribe_to_event(EVENT_NAMES) do |event_name, duration, payload|
    next if EXCLUDED_EVENTS.include? payload[:name]
    record_on_current_span(
      op: SPAN_PREFIX + event_name,
      origin: SPAN_ORIGIN,
      start_timestamp: payload[START_TIMESTAMP_NAME],
      description: payload[:sql],
      duration: duration
    ) do |span|
      span.set_tag(:cached, true) if payload.fetch(:cached, false) # cached key is only set for hits in the QueryCache, from Rails 5.1
      connection = payload[:connection]
      if payload[:connection_id]
        span.set_data(:connection_id, payload[:connection_id])
        # we fallback to the base connection on rails < 6.0.0 since the payload doesn't have it
        connection ||= ActiveRecord::Base.connection_pool.connections.find { |conn| conn.object_id == payload[:connection_id] }
      end
      next unless connection
      db_config =
        if connection.pool.respond_to?(:db_config)
          connection.pool.db_config.configuration_hash
        elsif connection.pool.respond_to?(:spec)
          connection.pool.spec.config
        end
      next unless db_config
      adapter = db_config[:adapter]
      adapter = "mysql" if adapter == "trilogy"
      span.set_data(Span::DataConventions::DB_SYSTEM, adapter) if adapter
      span.set_data(Span::DataConventions::DB_NAME, db_config[:database]) if db_config[:database]
      span.set_data(Span::DataConventions::SERVER_ADDRESS, db_config[:host]) if db_config[:host]
      span.set_data(Span::DataConventions::SERVER_PORT, db_config[:port]) if db_config[:port]
      span.set_data(Span::DataConventions::SERVER_SOCKET_ADDRESS, db_config[:socket]) if db_config[:socket]
      # both duration and query_source_threshold are in ms
      if record_query_source && duration >= query_source_threshold
        backtrace_line = Backtrace.source_location(&backtrace_cleaner)
        if backtrace_line
          span.set_data(Span::DataConventions::FILEPATH, backtrace_line.file) if backtrace_line.file
          span.set_data(Span::DataConventions::LINENO, backtrace_line.number) if backtrace_line.number
          span.set_data(Span::DataConventions::FUNCTION, backtrace_line.method) if backtrace_line.method
          # Only JRuby has namespace in the backtrace
          span.set_data(Span::DataConventions::NAMESPACE, backtrace_line.module_name) if backtrace_line.module_name
        end
      end
    end
  end
end