Module: Instana::Instrumentation::Dalli

Defined in:
lib/instana/instrumentation/dalli.rb

Instance Method Summary collapse

Instance Method Details

#get_multi(*keys) ⇒ Object 



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# File 'lib/instana/instrumentation/dalli.rb', line 37

def get_multi(*keys)
  entry_payload = { :memcache => {} }
  entry_payload[:memcache][:namespace] = @options[:namespace] if @options.key?(:namespace)
  entry_payload[:memcache][:command] = :get_multi
  entry_payload[:memcache][:keys] = keys.flatten.join(", ")

  ::Instana.tracer.log_entry(:memcache, entry_payload)
  exit_payload = { :memcache => {} }

  result = super(*keys)

  exit_payload[:memcache][:hits] = result.length
  result
rescue => e
  exit_payload[:memcache][:error] = e.message rescue nil
  ::Instana.tracer.log_error(e)
  raise
ensure
  ::Instana.tracer.log_exit(:memcache, exit_payload)
end

#perform(*args, &blk) ⇒ Object 



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# File 'lib/instana/instrumentation/dalli.rb', line 7

def perform(*args, &blk)
  if !::Instana.tracer.tracing? || ::Instana.tracer.tracing_span?(:memcache)
    do_skip = true
    return super(*args, &blk)
  end

  op, key, *_opts = args

  entry_payload = { :memcache => {} }
  entry_payload[:memcache][:namespace] = @options[:namespace] if @options.key?(:namespace)
  entry_payload[:memcache][:command] = op
  entry_payload[:memcache][:key] = key

  ::Instana.tracer.start_span(:memcache, attributes: entry_payload)
  exit_payload = { :memcache => {} }

  result = super(*args, &blk)

  if op == :get
    exit_payload[:memcache][:hit] = result ? 1 : 0
  end
  result
rescue => e
  exit_payload[:memcache][:error] = e.message rescue nil
  ::Instana.tracer.log_error(e)
  raise
ensure
  ::Instana.tracer.log_exit(:memcache, exit_payload) unless do_skip
end