Class: Fluent::RouteOutput

Inherits:
MultiOutput
  • Object
show all
Includes:
Mixin::ConfigPlaceholders
Defined in:
lib/fluent/plugin/out_route.rb

Defined Under Namespace

Classes: Route

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ RouteOutput

Returns a new instance of RouteOutput.



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# File 'lib/fluent/plugin/out_route.rb', line 82

def initialize
  super
  @routes = []
  @tag_cache = {}
  @match_cache = {}
end

Instance Attribute Details

#routes ⇒ Object (readonly)

TODO tag_transform regexp



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

def routes
  @routes
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_route.rb', line 100

def configure(conf)
  super

  if @remove_tag_prefix
    @prefix_match = /^#{Regexp.escape(@remove_tag_prefix)}\.?/
  else
    @prefix_match = //
  end
  if @add_tag_prefix
    @tag_prefix = "#{@add_tag_prefix}."
  else
    @tag_prefix = ""
  end

  conf.elements.select {|e|
    e.name == 'route'
  }.each {|e|
    route = Route.new(e.arg)
    route.configure(e)
    @routes << route
  }
end

#emit(tag, es, chain) ⇒ Object 



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# File 'lib/fluent/plugin/out_route.rb', line 123

def emit(tag, es, chain)
  ntag, targets = @match_cache[tag]
  unless targets
    ntag = tag.sub(@prefix_match, @tag_prefix)
    targets = []
    @routes.each {|r|
      if r.match?(ntag)
        targets << r
        break unless r.copy?
      end
    }
    if @match_cache.size < 1024  # TODO size limit
      @match_cache[tag] = [ntag, targets]
    end
  end

  case targets.size
  when 0
    return
  when 1
    targets.first.emit(ntag, es)
    chain.next
  else
    unless es.repeatable?
      m = MultiEventStream.new
      es.each {|time,record|
        m.add(time, record)
      }
      es = m
    end
    targets.each {|t|
      t.emit(ntag, es)
    }
    chain.next
  end
end