Class: LogParserNotifier::RailsRequestNotifier

Inherits:
Object
  • Object
show all
Defined in:
lib/log_parser_notifier/rails_request_notifier.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(log_file, slow_request_threshold = 500) ⇒ RailsRequestNotifier

Returns a new instance of RailsRequestNotifier.



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# File 'lib/log_parser_notifier/rails_request_notifier.rb', line 6

def initialize(log_file, slow_request_threshold = 500)
  @log_reader = LogReader.new log_file
  @slow_request_threshold = slow_request_threshold
  puts @slow_request_threshold
end

Class Method Details

.render_line(line_hash) ⇒ Object 



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# File 'lib/log_parser_notifier/rails_request_notifier.rb', line 52

def self.render_line(line_hash)
  case line_hash[:line_type]
  when :started
    %Q(Started #{line_hash[:method]} "#{line_hash[:path]}" for #{line_hash[:ip]} at #{Time.parse(line_hash[:timestamp].to_s)})
  when :processing
    %Q(Processing by #{line_hash[:controller]}##{line_hash[:action]} as #{line_hash[:format]})
  when :parameters
    %Q(Parameters: #{line_hash[:params].inspect})
  when :rendered
    "  Rendered #{line_hash[:rendered_file]} (#{line_hash[:partial_duration]}ms)"
  when :completed
    "Completed #{line_hash[:status]} OK in #{(line_hash[:duration] * 1000).to_i}ms (Views: #{(line_hash[:view] || 0) * 1000}ms | ActiveRecord: #{(line_hash[:db] || 0) * 1000}ms)"
  else
    line_hash.inspect
  end
end

Instance Method Details

#parse_and_trigger_notifications ⇒ Object 



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# File 'lib/log_parser_notifier/rails_request_notifier.rb', line 20

def parse_and_trigger_notifications
  parser.parse_stream @log_reader.log_io do |request|
    tags = %W(controller:#{request[:controller]} action:#{request[:action]} con_act:#{request[:controller]}##{request[:action]})

    LogParserNotifier.logger.debug("processing request for #{request[:controller]}##{request[:action]} with status: #{request[:status]} it is complete: #{request.completed?}")
    if request.completed? &&
       !request[:status].nil? &&
       request[:status] >= 200 &&
       request[:status] < 400
      statsd.increment 'rails.requests', tags: tags
      statsd.timing 'rails.load_time', request[:duration] * 1000, tags: tags

      if request[:duration] * 1000 >= @slow_request_threshold
        log = request.lines.collect { |line_hash| RailsRequestNotifier.render_line(line_hash) }.join("\n")
        statsd.event(
          "#{request[:controller]}##{request[:action]} #{request[:method]} slow request #{request[:duration]} sec",
          log,
          {
            date_happened: Time.parse(request[:timestamp].to_s).to_i.to_s,
            aggregation_key: 'slow_request_rails',
            source_type_name: 'rails_log',
            alert_type: 'warning',
            tags: tags
          }
        )
      end
    else
      statsd.increment 'rails.failed_requests', tags: tags
    end
  end
end

#parser ⇒ Object 



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# File 'lib/log_parser_notifier/rails_request_notifier.rb', line 12

def parser
  @parser ||= RequestLogAnalyzer::Source::LogParser.new(RequestLogAnalyzer::FileFormat::Rails3.create)
end

#statsd ⇒ Object 



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# File 'lib/log_parser_notifier/rails_request_notifier.rb', line 16

def statsd
  @statsd ||= Statsd.new('localhost', 8125)
end