Class: Fluent::KafkaOutput
- Inherits:
-
Output
- Object
- Output
- Fluent::KafkaOutput
- Defined in:
- lib/fluent/plugin/out_kafka.rb
Instance Attribute Summary collapse
-
#field_separator ⇒ Object
Returns the value of attribute field_separator.
-
#output_data_type ⇒ Object
Returns the value of attribute output_data_type.
Instance Method Summary collapse
- #configure(conf) ⇒ Object
- #emit(tag, es, chain) ⇒ Object
-
#initialize ⇒ KafkaOutput
constructor
A new instance of KafkaOutput.
- #parse_record(record) ⇒ Object
- #refresh_producer ⇒ Object
- #shutdown ⇒ Object
- #start ⇒ Object
Constructor Details
#initialize ⇒ KafkaOutput
Returns a new instance of KafkaOutput.
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# File 'lib/fluent/plugin/out_kafka.rb', line 4 def initialize super require 'poseidon' end |
Instance Attribute Details
#field_separator ⇒ Object
Returns the value of attribute field_separator.
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# File 'lib/fluent/plugin/out_kafka.rb', line 25 def field_separator @field_separator end |
#output_data_type ⇒ Object
Returns the value of attribute output_data_type.
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# File 'lib/fluent/plugin/out_kafka.rb', line 24 def output_data_type @output_data_type end |
Instance Method Details
#configure(conf) ⇒ Object
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# File 'lib/fluent/plugin/out_kafka.rb', line 55 def configure(conf) super if @zookeeper require 'zookeeper' require 'yajl' else @seed_brokers = @brokers.match(",").nil? ? [@brokers] : @brokers.split(",") log.info "brokers has been set directly: #{@seed_brokers}" end if @compression_codec == 'snappy' require 'snappy' end case @output_data_type when 'json' require 'yajl' when 'ltsv' require 'ltsv' when 'msgpack' require 'msgpack' end @f_separator = case @field_separator when /SPACE/i then ' ' when /COMMA/i then ',' when /SOH/i then "\x01" else "\t" end @custom_attributes = if @output_data_type == 'json' nil elsif @output_data_type == 'ltsv' nil elsif @output_data_type == 'msgpack' nil elsif @output_data_type =~ /^attr:(.*)$/ $1.split(',').map(&:strip).reject(&:empty?) else @formatter = Fluent::Plugin.new_formatter(@output_data_type) @formatter.configure(conf) nil end end |
#emit(tag, es, chain) ⇒ Object
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# File 'lib/fluent/plugin/out_kafka.rb', line 129 def emit(tag, es, chain) begin chain.next es.each do |time,record| record['time'] = time if @output_include_time record['tag'] = tag if @output_include_tag topic = record['topic'] || self.default_topic || tag partition_key = record['partition_key'] || @default_partition_key value = @formatter.nil? ? parse_record(record) : @formatter.format(tag, time, record) log.trace("message send to #{topic} with key: #{partition_key} and value: #{value}.") = Poseidon::MessageToSend.new(topic, value, partition_key) @producer.([]) end rescue Exception => e log.warn("Send exception occurred: #{e}") refresh_producer() raise e end end |
#parse_record(record) ⇒ Object
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# File 'lib/fluent/plugin/out_kafka.rb', line 108 def parse_record(record) if @custom_attributes.nil? case @output_data_type when 'json' Yajl::Encoder.encode(record) when 'ltsv' LTSV.dump(record) when 'msgpack' record.to_msgpack else record.to_s end else @custom_attributes.unshift('time') if @output_include_time @custom_attributes.unshift('tag') if @output_include_tag @custom_attributes.map { |attr| record[attr].nil? ? '' : record[attr].to_s }.join(@f_separator) end end |
#refresh_producer ⇒ Object
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# File 'lib/fluent/plugin/out_kafka.rb', line 33 def refresh_producer() if @zookeeper @seed_brokers = [] z = Zookeeper.new(@zookeeper) z.get_children(:path => '/brokers/ids')[:children].each do |id| broker = Yajl.load(z.get(:path => "/brokers/ids/#{id}")[:data]) @seed_brokers.push("#{broker['host']}:#{broker['port']}") end log.info "brokers has been refreshed via Zookeeper: #{@seed_brokers}" end begin if @seed_brokers.length > 0 @producer = Poseidon::Producer.new(@seed_brokers, @client_id, :max_send_retries => @max_send_retries, :required_acks => @required_acks, :ack_timeout_ms => @ack_timeout_ms, :compression_codec => @compression_codec.to_sym) log.info "initialized producer #{@client_id}" else log.warn "No brokers found on Zookeeper" end rescue Exception => e log.error e end end |
#shutdown ⇒ Object
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# File 'lib/fluent/plugin/out_kafka.rb', line 104 def shutdown super end |
#start ⇒ Object
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# File 'lib/fluent/plugin/out_kafka.rb', line 99 def start super refresh_producer() end |