Class: Fluent::OnlineuserOutput

Inherits:
BufferedOutput
  • Object
show all
Defined in:
lib/fluent/plugin/out_onlineuser.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ OnlineuserOutput

Returns a new instance of OnlineuserOutput.



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# File 'lib/fluent/plugin/out_onlineuser.rb', line 21

def initialize
  super
  require 'redis'
  require 'msgpack'
  require 'rubygems'
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_onlineuser.rb', line 28

def configure(conf)
  super
  @host = conf.has_key?('host') ? conf['host'] : 'localhost'
  @port = conf.has_key?('port') ? conf['port'].to_i : 6379
  @db_number = conf.has_key?('db_number') ? conf['db_number'].to_i : nil

  @user_identify = @user_identify.split '|'

  if @segment
    s = @segment.split /\s+/
    case s.first
      when 'tag'
        @cal_segment = lambda { |tag, record| 'tag:' + tag }
      when 'capture'
        if s.length == 3
          format = s[2]
          if format[0] == ?/ and format[-1] == ?/
            format = format[1..-2]
          end
          regexp = Regexp.new(format)
          @cal_segment = lambda { |tag, record|
            if record[s[1]] and record[s[1]].is_a? String
              if c = record[s[1]].match(regexp)
                'captured_' + s[1] + ':' + (c.captures.join '_')
              end
            end
          }
        else
          raise Fluent::ConfigError, "wrong segment capture, specify it like 'capture __FIELD_NAME__ __CAPTURE_REGEX__'"
        end
      else
        @cal_segment = lambda { |tag, record|
          if record[@segment]
            @segment + ':' + record[@segment]
          end
        }
    end
  end
end

#extract_uid(record) ⇒ Object 



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# File 'lib/fluent/plugin/out_onlineuser.rb', line 144

def extract_uid(record)
  i = @user_identify.detect { |id|
    v = record[id]
    (v.is_a?(String) and !v.empty?) or (v.is_a?(Numeric) and v != 0)
  }
  i ? record[i] : nil
end

#format(tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/out_onlineuser.rb', line 152

def format(tag, time, record)
  [tag, time, record].to_msgpack
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/out_onlineuser.rb', line 89

def shutdown
  @redis.quit
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/out_onlineuser.rb', line 68

def start
  super

  begin
    gem "hiredis"
    @redis = Redis.new(
        :host => @host, :port => @port, :driver => :hiredis,
        :thread_safe => true, :db => @db_index
    )
  rescue LoadError
    @redis = Redis.new(
        :host => @host, :port => @port,
        :thread_safe => true, :db => @db_index
    )
  end

  @segments = {}

  start_watch
end

#start_watch ⇒ Object 



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# File 'lib/fluent/plugin/out_onlineuser.rb', line 110

def start_watch
  @watcher = Thread.new(&method(:watch))
end

#to_redis_key(segment_str) ⇒ Object 



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# File 'lib/fluent/plugin/out_onlineuser.rb', line 93

def to_redis_key(segment_str)
  @redis_key_prefix + segment_str
end

#tryOnRedis(method, *args) ⇒ Object 



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# File 'lib/fluent/plugin/out_onlineuser.rb', line 97

def tryOnRedis(method, *args)
  tries = 0
  begin
    @redis.send(method, *args) if @redis.respond_to? method
  rescue Redis::CommandError => e
    tries += 1
    # retry 3 times
    retry if tries <= @redis_retry
    $log.warn %Q[redis command retry failed : #{method}(#{args.join(', ')})]
    raise e.message
  end
end

#user_count(segment) ⇒ Object 



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# File 'lib/fluent/plugin/out_onlineuser.rb', line 137

def user_count(segment)
  to_expire = Fluent::Engine.now - @session_timeout
  key = to_redis_key segment
  tryOnRedis 'zremrangebyscore', key, '-inf', to_expire
  tryOnRedis 'zcard', key
end

#watch ⇒ Object 



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# File 'lib/fluent/plugin/out_onlineuser.rb', line 114

def watch
  @last_checked = Fluent::Engine.now
  tick = 60
  while true
    sleep 0.5
    if Fluent::Engine.now - @last_checked >= tick
      now = Fluent::Engine.now

      @segments.each_key do |segment|
        user_num = user_count segment

        if user_num == 0
          @segments.delete segment
        elsif not @silent
          Fluent::Engine.emit @tag + '.' + segment, Fluent::Engine.now, {"online_user" => user_num}
        end
      end

      @last_checked = now
    end
  end
end

#write(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_onlineuser.rb', line 156

def write(chunk)

  online_user = Hash.new { |hash, key| hash[key] = Hash.new }

  begin
    chunk.msgpack_each do |(tag, time, record)|

      if (uid = extract_uid record)
        online_user['all'][uid] = time

        if @cal_segment and @cal_segment != '' and segment = @cal_segment.call(tag, record)
          online_user[segment][uid] = time
        end
      end
    end

    ## write to redis
    online_user.each { |segment, users|
      @segments[segment] = true

      key = to_redis_key segment

      users.each { |uid, ts|
        tryOnRedis 'zadd', key, ts, uid
      }
    }

  end
end