class SemanticLogger::JRuby::GarbageCollectionLogger

Public Class Methods

new(min_microseconds = 10_000) click to toggle source

Only log the garbage collection if the number of microseconds exceeds this value

# File lib/semantic_logger/jruby/garbage_collection_logger.rb, line 8
def initialize(min_microseconds = 10_000)
  @min_microseconds = min_microseconds
end

Public Instance Methods

handleNotification(notification, _) click to toggle source

Must leave the method name as-is so that it can be found by Java

# File lib/semantic_logger/jruby/garbage_collection_logger.rb, line 13
def handleNotification(notification, _)
  # Only care about GARBAGE_COLLECTION_NOTIFICATION notifications
  unless notification.get_type == Java::ComSunManagement::GarbageCollectionNotificationInfo::GARBAGE_COLLECTION_NOTIFICATION
    return
  end

  info     = Java::ComSunManagement::GarbageCollectionNotificationInfo.from(notification.user_data)
  gc_info  = info.gc_info
  duration = gc_info.duration

  return unless duration >= @min_microseconds

  SemanticLogger["GarbageCollector"].measure_warn(
    "Garbage Collection completed: #{info.gc_name} ##{gc_info.id}",
    duration: duration.to_f / 1000
  )
end