Module: Fluent::NorikraPlugin::OutputMixin

Included in:
Fluent::NorikraFilterOutput, Fluent::NorikraOutput
Defined in:
lib/fluent/plugin/norikra/output.rb

Instance Method Summary collapse

Instance Method Details

#fetch_event_registration(query) ⇒ Object 



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# File 'lib/fluent/plugin/norikra/output.rb', line 67

def fetch_event_registration(query)
  return if query.tag.nil? || query.tag.empty?
  req = FetchRequest.new(:event, query.name, query.interval, 'string', query.tag, nil)
  insert_fetch_queue(req)
end

#format_stream(tag, es) ⇒ Object 



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# File 'lib/fluent/plugin/norikra/output.rb', line 154

def format_stream(tag, es)
  tobe_registered_target_names = []

  out = ''

  es.each do |time,record|
    target = @target_generator.call(tag, record)

    tgt = @target_mutex.synchronize do
      t = @target_map[target]
      unless t
        unless tobe_registered_target_names.include?(target)
          conf = @config_targets[target]
          unless conf
            @config_targets.values.each do |c|
              if c.target_matcher.match(target)
                conf = c
                break
              end
            end
          end
          t = Target.new(target, @default_target + conf)
          @registered_targets[target] = t
          @register_queue.push(t)
          tobe_registered_target_names.push(target)
        end
        t = @registered_targets[target]
      end
      t
    end

    event = tgt.filter(time, record)

    out << [tgt.escaped_name,event].to_msgpack
  end

  out
end

#prepare_target(client, target) ⇒ Object 



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# File 'lib/fluent/plugin/norikra/output.rb', line 105

def prepare_target(client, target)
  # target open and reserve fields
  log.debug "Going to prepare about target"
  begin
    unless client.targets.include?(target.escaped_name)
      log.debug "opening target #{target.escaped_name}"
      client.open(target.escaped_name, target.reserve_fields, target.auto_field)
      log.debug "opening target #{target.escaped_name}, done."
    end

    reserving = target.reserve_fields
    reserved = []
    client.fields(target.escaped_name).each do |field|
      if reserving[field['name']]
        reserved.push(field['name'])
        if reserving[field['name']] != field['type']
          log.warn "field type mismatch, reserving:#{reserving[field['name']]} but reserved:#{field['type']}"
        end
      end
    end

    reserving.each do |fieldname,type|
      client.reserve(target.escaped_name, fieldname, type) unless reserved.include?(fieldname)
    end
  rescue => e
    log.error "failed to prepare target:#{target.escaped_name}", :norikra => "#{@host}:#{@port}", :error => e.class, :message => e.message
    return false
  end

  # query registration
  begin
    registered = Hash[client.queries.map{|q| [q['name'], q['expression']]}]
    target.queries.each do |query|
      if registered.has_key?(query.name) # query already registered
        if registered[query.name] != query.expression
          log.warn "query name and expression mismatch, check norikra server status. target query name:#{query.name}"
        end
        next
      end
      client.register(query.name, query.group, query.expression)

      @query_map[query.name] = query
      fetch_event_registration(query)
    end
  rescue => e
    log.warn "failed to register query", :norikra => "#{@host}:#{@port}", :error => e.class, :message => e.message
  end
end

#prepared?(target_names) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/norikra/output.rb', line 63

def prepared?(target_names)
  fetchable? && target_names.reduce(true){|r,t| r && @target_map.values.any?{|target| target.escaped_name == t}}
end

#register_worker ⇒ Object 



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# File 'lib/fluent/plugin/norikra/output.rb', line 73

def register_worker
  while sleep(0.25)
    break unless @register_worker_running
    next unless fetchable?

    c = client()

    targets = @register_queue.shift(10)
    targets.each do |t|
      next if @target_map[t.name]

      log.debug "Preparing norikra target #{t.name} on #{@host}:#{@port}"
      if prepare_target(c, t)
        log.debug "success to prepare target #{t.name} on #{@host}:#{@port}"

        if @enable_auto_query
          raise "bug" unless self.respond_to?(:insert_fetch_queue)

          t.queries.each do |query|
            @query_map[query.name] = query
            fetch_event_registration(query)
          end
        end
        @target_map[t.name] = t
        @registered_targets.delete(t.name)
      else
        log.error "Failed to prepare norikra data for target:#{t.name}"
      end
    end
  end
end

#setup_output(conf, enable_auto_query) ⇒ Object 



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# File 'lib/fluent/plugin/norikra/output.rb', line 11

def setup_output(conf, enable_auto_query)
  @enable_auto_query = enable_auto_query

  @target_generator = case
                      when @target_string
                        lambda {|tag,record| @target_string}
                      when @target_map_key
                        lambda {|tag,record| record[@target_map_key]}
                      when @target_map_tag
                        lambda {|tag,record| tag.gsub(/^#{@remove_tag_prefix}(\.)?/, '')}
                      else
                        raise Fluent::ConfigError, "no one way specified to decide target"
                      end

  # target map already prepared (opened, and related queries registered)
  @target_map = {} # 'target' => instance of Fluent::NorikraPlugin::Target

  # for conversion from query_name to tag
  @query_map = {} # 'query_name' => instance of Fluent::NorikraPlugin::Query

  @default_target = ConfigSection.new(Fluent::Config::Element.new('default', nil, {}, []), @enable_auto_query)
  @config_targets = {}

  conf.elements.each do |element|
    case element.name
    when 'default'
      @default_target = ConfigSection.new(element, @enable_auto_query)
    when 'target'
      c = ConfigSection.new(element, @enable_auto_query)
      @config_targets[c.target] = c
    end
  end

  @target_mutex = Mutex.new
end

#shutdown_output ⇒ Object 



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# File 'lib/fluent/plugin/norikra/output.rb', line 58

def shutdown_output
  # @register_thread.kill
  @register_thread.join
end

#start_output ⇒ Object 



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# File 'lib/fluent/plugin/norikra/output.rb', line 47

def start_output
  @register_worker_running = true
  @register_queue = []
  @registered_targets = {}
  @register_thread = Thread.new(&method(:register_worker))
end

#stop_output ⇒ Object 



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# File 'lib/fluent/plugin/norikra/output.rb', line 54

def stop_output
  @register_worker_running = false
end

#write(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/norikra/output.rb', line 193

def write(chunk)
  events_map = {} # target => [event]
  chunk.msgpack_each do |target, event|
    events_map[target] ||= []
    events_map[target].push(event)
  end

  unless prepared?(events_map.keys)
    raise RuntimeError, "norikra server is not ready for this targets: #{events_map.keys.join(',')}"
  end

  c = client()

  events_map.each do |target, events|
    begin
      c.send(target, events)
    rescue Norikra::RPC::ClientError => e
      raise unless @drop_error_record
      log.warn "Norikra server reports ClientError, and dropped", target: target, message: e.message
    rescue Norikra::RPC::ServerError => e
      raise unless @drop_server_error_record
      log.warn "Norikra server reports ServerError, and dropped", target: target, message: e.message
    end
  end
end