Module: Statify

Defined in:
lib/statify.rb,
lib/statify/railtie.rb,
lib/statify/version.rb

Overview

Statify.configure do |config|

config.statsd = StatD.new...

end Statify.statsd =

Defined Under Namespace

Classes: Railtie

Constant Summary collapse

VERSION = 
"0.1.2"

Class Method Summary collapse

Class Method Details

.categories ⇒ Object 



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# File 'lib/statify.rb', line 36

def self.categories
  @@categories
end

.categories=(categories) ⇒ Object 



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# File 'lib/statify.rb', line 23

def self.categories=(categories)
  @@categories = categories

  # If you're running ruby-1.8.7 and your trying to get GC stats
  if @@categories.include?(:garbage_collection)
    if RUBY_VERSION < '1.9'
      # Fail and tell the user to remove the GC stats
      fail "The GC stats don't work in Ruby 1.8.7.  Please remove the :grabage_collection from the categories"
      @@stats.delete(:grabage_collection)
    end
  end
end

.configure {|_self| ... } ⇒ Object

Yields:

  • (_self)

Yield Parameters:

  • _self (Statify) —

    the object that the method was called on



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# File 'lib/statify.rb', line 9

def self.configure
  yield self
end

.statsd ⇒ Object 



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# File 'lib/statify.rb', line 19

def self.statsd
  @@statsd
end

.statsd=(statsd) ⇒ Object

This takes an instance of a StatsD Statsd.new(‘127.1.1.1’, 8125)



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# File 'lib/statify.rb', line 15

def self.statsd=(statsd)
  @@statsd = statsd
end

.subscribe ⇒ Object 



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# File 'lib/statify.rb', line 40

def self.subscribe
  if Statify.categories.include?(:sql)
    # This should give us reports on response times to queries
    ActiveSupport::Notifications.subscribe "sql.active_record" do |*args|
      event = ActiveSupport::Notifications::Event.new(*args)
      # Don't include explains or schema DB calls
      unless ["EXPLAIN", "SCHEMA"].include?(event.payload[:name])
        # # We are hoping this gives us basic metris for query durations for us to track.
        @@statsd.timing "#{event.name}", event.duration
      end
    end
  end

  if Statify.categories.include?(:garbage_collection) || Statify.categories.include?(:controller)
    # This should give us reports on average response times by controller and action
    ActiveSupport::Notifications.subscribe "process_action.action_controller" do |*args|      
      event = ActiveSupport::Notifications::Event.new(*args)
      
      if Statify.categories.include?(:garbage_collection)
        # Let's log the GC
        gc_stats = GC::stat 
        @@statsd.count('gc_count', gc_stats[:count])
        @@statsd.count('gc_heap_used', gc_stats[:heap_used])
        @@statsd.count('gc_heap_length', gc_stats[:heap_length])
        @@statsd.count('gc_heap_increment', gc_stats[:heap_increment])
        @@statsd.count('gc_heap_live_num', gc_stats[:heap_live_num])
        @@statsd.count('gc_heap_free_num', gc_stats[:heap_live_num])
        @@statsd.count('gc_heap_final_num', gc_stats[:heap_live_num])
      end

      if Statify.categories.include?(:controller)
        # Track overall, db and view durations
        @@statsd.timing "overall_duration|#{event.payload[:controller]}/#{event.payload[:action]}", event.duration
        @@statsd.timing "db_runtime|#{event.payload[:controller]}/#{event.payload[:action]}", event.payload[:db_runtime]
        @@statsd.timing "view_runtime|#{event.payload[:controller]}/#{event.payload[:action]}", event.payload[:view_runtime]
      end
    end
  end

  if Statify.categories.include?(:cache)
    # I want to keep track of how many cache hits we get as opposed to cache misses
    ActiveSupport::Notifications.subscribe "cache_fetch_hit.active_support" do |*args|
      event = ActiveSupport::Notifications::Event.new(*args)
      @@statsd.increment('cache_hit', 1)
    end

    # I want to keep track of how many cache misses we get as opposed to cache hits
    ActiveSupport::Notifications.subscribe "cache_write.active_support" do |*args|
      event = ActiveSupport::Notifications::Event.new(*args)
      @@statsd.increment('cache_miss', 1)
    end
  end
end