Module: TraceView::Inst::MemcachedRails

Defined in:
lib/traceview/inst/memcached.rb

Overview

module Memcached

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(cls) ⇒ Object 



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# File 'lib/traceview/inst/memcached.rb', line 44

def self.included(cls)
  cls.class_eval do
    if ::Memcached::Rails.method_defined? :get_multi
      alias get_multi_without_traceview get_multi
      alias get_multi get_multi_with_traceview
    elsif TraceView::Config[:verbose]
      TraceView.logger.warn '[traceview/loading] Couldn\'t properly instrument Memcached.  Partial traces may occur.'
    end
  end
end

Instance Method Details

#get_multi_with_traceview(keys, raw = false) ⇒ Object 



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# File 'lib/traceview/inst/memcached.rb', line 55

def get_multi_with_traceview(keys, raw = false)
  if TraceView.tracing?
    layer_kvs = {}
    layer_kvs[:KVOp] = :get_multi

    TraceView::API.trace(:memcache, layer_kvs || {}, :get_multi) do
      begin
        info_kvs = {}
        info_kvs[:KVKeyCount] = keys.flatten.length

        values = get_multi_without_traceview(keys, raw)

        info_kvs[:KVHitCount] = values.length
        info_kvs[:Backtrace] = TraceView::API.backtrace if TraceView::Config[:memcached][:collect_backtraces]

        TraceView::API.log(:memcache, :info, info_kvs)
      rescue
        values = get_multi_without_traceview(keys, raw)
      end
      values
    end
  else
    get_multi_without_traceview(keys, raw)
  end
end