Class: Fluent::Plugin::LabelRouterOutput

Inherits:
BareOutput
  • Object
show all
Defined in:
lib/fluent/plugin/out_label_router.rb

Defined Under Namespace

Classes: Route

Instance Method Summary collapse

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_label_router.rb', line 174

def configure(conf)
  super
  @route_map = Hash.new { |h, k| h[k] = Array.new }
  @routers = []
  @default_router = nil
  @routes.each do |rule|
    route_router = event_emitter_router(rule['@label'])
    puts rule
    @routers << Route.new(rule.matches, rule.tag.to_s, route_router)
  end

  if @default_route != '' or @default_tag != ''
    @default_router = Route.new(nil, @default_tag, event_emitter_router(@default_route))
  end

  @access_to_labels = record_accessor_create("$.kubernetes.labels")
  @access_to_namespace = record_accessor_create("$.kubernetes.namespace_name")
  @access_to_host = record_accessor_create("$.kubernetes.host")
  @access_to_container_name = record_accessor_create("$.kubernetes.container_name")

  @batch = @emit_mode == :batch
end

#process(tag, es) ⇒ Object 



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# File 'lib/fluent/plugin/out_label_router.rb', line 126

def process(tag, es)
  if @sticky_tags
    if @route_map.has_key?(tag)
      # We already matched with this tag send events to the routers
      @route_map[tag].each do |r|
        r.emit_es(tag, es.dup)
      end
      return
    end
  end
  event_stream = Hash.new {|h, k| h[k] = Fluent::MultiEventStream.new }
  es.each do |time, record|
    input_metadata = { labels: @access_to_labels.call(record).to_h,
                       namespace: @access_to_namespace.call(record).to_s,
                       container: @access_to_container_name.call(record).to_s,
                       host: @access_to_host.call(record).to_s}
    orphan_record = true
    @routers.each do |r|
      if r.match?(input_metadata)
        orphan_record = false
        if @sticky_tags
          @route_map[tag].push(r)
        end
        if @batch
          event_stream[r].add(time, record)
        else
          r.emit(tag, time, record.dup)
        end
      end
    end
    if !@default_router.nil? && orphan_record
      if @sticky_tags
        @route_map[tag].push(@default_router)
      end
      if @batch
        event_stream[@default_router].add(time, record)
      else
        @default_router.emit(tag, time, record.dup)
      end
    end
    if @batch
      event_stream.each do |r, es|
        r.emit_es(tag, es.dup)
      end
    end
  end
end