Module: NewRelic::Agent::Instrumentation::ActiveRecordInstrumentation

Defined in:
lib/new_relic/agent/instrumentation/active_record_instrumentation.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(instrumented_class) ⇒ Object 



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# File 'lib/new_relic/agent/instrumentation/active_record_instrumentation.rb', line 10

def self.included(instrumented_class)
  instrumented_class.class_eval do
    alias_method :log_without_newrelic_instrumentation, :log
    alias_method :log, :log_with_newrelic_instrumentation
    protected :log
  end
end

Instance Method Details

#log_with_newrelic_instrumentation(sql, name, &block) ⇒ Object 



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# File 'lib/new_relic/agent/instrumentation/active_record_instrumentation.rb', line 18

def log_with_newrelic_instrumentation(sql, name, &block)

  return log_without_newrelic_instrumentation(sql, name, &block) unless NewRelic::Agent.is_execution_traced?

  # Capture db config if we are going to try to get the explain plans
  if (defined?(ActiveRecord::ConnectionAdapters::MysqlAdapter) && self.is_a?(ActiveRecord::ConnectionAdapters::MysqlAdapter)) ||
      (defined?(ActiveRecord::ConnectionAdapters::PostgreSQLAdapter) && self.is_a?(ActiveRecord::ConnectionAdapters::PostgreSQLAdapter))
    supported_config = @config
  end
  if name && (parts = name.split " ") && parts.size == 2
    model = parts.first
    operation = parts.last.downcase
    metric_name = case operation
                  when 'load' then 'find'
                  when 'indexes', 'columns' then nil # fall back to DirectSQL
                  when 'destroy', 'find', 'save', 'create' then operation
                  when 'update' then 'save'
                  else
                    if model == 'Join'
                      operation
                    end
                  end
    metric = "ActiveRecord/#{model}/#{metric_name}" if metric_name
  end

  if metric.nil?
    metric = NewRelic::Agent::Instrumentation::MetricFrame.database_metric_name
    if metric.nil?
      if sql =~ /^(select|update|insert|delete|show)/i
        # Could not determine the model/operation so let's find a better
        # metric.  If it doesn't match the regex, it's probably a show
        # command or some DDL which we'll ignore.
        metric = "Database/SQL/#{$1.downcase}"
      else
        metric = "Database/SQL/other"
      end
    end
  end

  if !metric
    log_without_newrelic_instrumentation(sql, name, &block)
  else
    metrics = [metric, "ActiveRecord/all"]
    metrics << "ActiveRecord/#{metric_name}" if metric_name
    self.class.trace_execution_scoped(metrics) do
      t0 = Time.now
      begin
        log_without_newrelic_instrumentation(sql, name, &block)
      ensure
        NewRelic::Agent.instance.transaction_sampler.notice_sql(sql, supported_config, (Time.now - t0).to_f)
      end
    end
  end
end