Class: Mongo::Collection::View

Inherits:
Object
  • Object
show all
Defined in:
lib/traceview/inst/mongo2.rb

Instance Method Summary collapse

Instance Method Details

#collect_kvs(op, args) ⇒ Object

collect_kvs

Used to collect up information to report and build a hash with the Keys/Values to report.



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# File 'lib/traceview/inst/mongo2.rb', line 108

def collect_kvs(op, args)
  kvs = { :Flavor => :mongodb, :Database => @collection.database.name }

  kvs[:QueryOp] = op
  kvs[:Collection] = @collection.name

  if op == :map_reduce
    kvs[:Map_Function] = args[0]
    kvs[:Reduce_Function] = args[1]
    kvs[:Limit] = args[2][:limit] if args[2].is_a?(Hash) && args[2].key?(:limit)
  end

  if TraceView::Config[:mongo][:log_args]
    if VIEW_QUERY_OPS.include?(op)
      if defined?(filter)
        kvs[:Query] = filter.to_json
      elsif defined?(selector)
        kvs[:Query] = selector.to_json
      end
    end
  end

  kvs[:RemoteHost] = @collection.database.client.cluster.addresses.first.to_s
  kvs[:Backtrace] = TraceView::API.backtrace if TraceView::Config[:mongo][:collect_backtraces]
rescue => e
  TraceView.logger.debug "[traceview/debug] #{__method__}:#{File.basename(__FILE__)}:#{__LINE__}: #{e.message}" if TraceView::Config[:verbose]
ensure
  return kvs
end

#m ⇒ Object

Here we dynamically define wrapper methods for the operations we want to instrument in mongo



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# File 'lib/traceview/inst/mongo2.rb', line 142

VIEW_OPS.reject { |m| !method_defined?(m) }.each do |m|
  define_method("#{m}_with_traceview") do |*args|
    begin
      if !TraceView.tracing? || TraceView.tracing_layer?(:mongo)
        mongo_skipped = true
        return send("#{m}_without_traceview", *args)
      end

      kvs = collect_kvs(m, args)
      TraceView::API.log_entry(:mongo, kvs)

      send("#{m}_without_traceview", *args)
    rescue => e
      TraceView::API.log_exception(:mongo, e)
      raise e
    ensure
      TraceView::API.log_exit(:mongo) unless mongo_skipped
    end
  end
  ::TraceView::Util.method_alias(Mongo::Collection::View, m)
end