Class: ScoutApm::Logging::Loggers::Formatter

Inherits:
Logger::Formatter
  • Object
show all
Defined in:
lib/scout_apm/logging/loggers/formatter.rb

Overview

A simple JSON formatter which we can add a couple attributes to.

Constant Summary collapse

DATETIME_FORMAT = 
'%Y-%m-%dT%H:%M:%S.%LZ'

Instance Method Summary collapse

Instance Method Details

#call(severity, time, progname, msg) ⇒ Object

rubocop:disable Metrics/AbcSize



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# File 'lib/scout_apm/logging/loggers/formatter.rb', line 15

def call(severity, time, progname, msg) # rubocop:disable Metrics/AbcSize
  attributes_to_log = {
    severity: severity,
    time: format_datetime(time),
    msg: msg2str(msg)
  }

  attributes_to_log[:progname] = progname if progname
  attributes_to_log['service.name'] = service_name

  attributes_to_log.merge!(scout_transaction_id)
  attributes_to_log.merge!(scout_layer)
  attributes_to_log.merge!(scout_context)
  # Naive local benchmarks show this takes around 200 microseconds. As such, we only apply it to WARN and above.
  attributes_to_log.merge!(local_log_location) if ::Logger::Severity.const_get(severity) >= ::Logger::Severity::WARN

  message = "#{attributes_to_log.to_json}\n"

  ScoutApm::Logging::Loggers::OpenTelemetry.logger_provider.logger(
    name: 'scout_apm',
    version: '0.1.0'
  ).on_emit(
    severity_text: severity,
    severity_number: ::Logger::Severity.const_get(severity),
    attributes: attributes_to_log,
    timestamp: time,
    body: msg,
    context: ::OpenTelemetry::Context.current
  )
  message
end