Class: Kafka::Producer

Inherits:
Object
  • Object
show all
Defined in:
lib/jruby-kafka/producer.rb

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Producer

Create a Kafka Producer

options: :broker_list => “localhost:9092” - REQUIRED: a seed list of kafka brokers



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# File 'lib/jruby-kafka/producer.rb', line 15

def initialize(options={})
  validate_required_arguments(options)

  @metadata_broker_list = options[:broker_list]
  @serializer_class = nil
  @partitioner_class = nil
  @request_required_acks = nil
  @compression_codec = nil
  @compressed_topics = nil
  @request_timeout_ms = nil
  @producer_type = nil
  @key_serializer_class = nil
  @message_send_max_retries = nil
  @retry_backoff_ms = nil
  @topic_metadata_refresh_interval_ms = nil
  @queue_buffering_max_ms = nil
  @queue_buffering_max_messages = nil
  @queue_enqueue_timeout_ms = nil
  @batch_num_messages = nil
  @send_buffer_bytes = nil
  @client_id = nil

  if options[:partitioner_class]
    @partitioner_class = "#{options[:partitioner_class]}"
  end

  if options[:request_required_acks]
    valid_acks = %w{ 0 1 -1 }
    if not valid_acks.include? "#{options[:request_required_acks]}"
      raise(ArgumentError, "#{options[:request_required_acks]} is not a valid request_required_acks value: #{valid_acks}")
    end
    @request_required_acks = "#{options[:request_required_acks]}"
  end

  if options[:compression_codec]
    required_codecs = ["#{Java::kafka::message::NoCompressionCodec.name}",
                       "#{Java::kafka::message::GZIPCompressionCodec.name}",
                       "#{Java::kafka::message::SnappyCompressionCodec.name}"]
    if not required_codecs.include? "#{options[:compression_codec]}"
      raise(ArgumentError, "#{options[:compression_codec]} is not one of required codecs: #{required_codecs}")
    end
    @compression_codec = "#{options[:compression_codec]}"
  end

  if options[:compressed_topics]
    if @compression_codec != 'none'
      @compressed_topics = "#{options[:compressed_topics]}"
    end
  end

  if options[:request_timeout_ms]
    @request_timeout_ms = "#{options[:request_timeout_ms]}"
  end

  if options[:producer_type]
    valid_producer_types = %w{ sync async }
    if not valid_producer_types.include? "#{options[:producer_type]}"
      raise(ArgumentError, "#{options[:producer_type]} is not a valid producer type: #{valid_producer_types}")
    end
    @producer_type = "#{options[:producer_type]}"
  end

  if options[:serializer_class]
    @serializer_class = "#{options[:serializer_class]}"
  end

  if options[:key_serializer_class]
    @key_serializer_class = "#{options[:key_serializer_class]}"
  end

  if options[:message_send_max_retries]
    @message_send_max_retries = "#{options[:message_send_max_retries]}"
  end

  if options[:retry_backoff_ms]
    @retry_backoff_ms = "#{options[:retry_backoff_ms]}"
  end

  if options[:topic_metadata_refresh_interval_ms]
    @topic_metadata_refresh_interval_ms = "#{options[:topic_metadata_refresh_interval_ms]}"
  end

  if options[:queue_buffering_max_ms]
    @queue_buffering_max_ms = "#{options[:queue_buffering_max_ms]}"
  end

  if options[:queue_buffering_max_messages]
    @queue_buffering_max_messages = "#{options[:queue_buffering_max_messages]}"
  end

  if options[:queue_enqueue_timeout_ms]
    @queue_enqueue_timeout_ms = "#{options[:queue_enqueue_timeout_ms]}"
  end

  if options[:batch_num_messages]
    @batch_num_messages = "#{options[:batch_num_messages]}"
  end

  if options[:send_buffer_bytes]
    @send_buffer_bytes = "#{options[:send_buffer_bytes]}"
  end

  if options[:client_id]
    @client_id = "#{options[:client_id]}"
  end
end

Instance Method Details

#connect ⇒ Object 



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# File 'lib/jruby-kafka/producer.rb', line 130

def connect()
  @producer = Java::kafka::producer::Producer.new(createProducerConfig)
end

#createProducerConfig ⇒ Object 



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# File 'lib/jruby-kafka/producer.rb', line 148

def createProducerConfig()
  # TODO lots more options avaiable here: http://kafka.apache.org/documentation.html#producerconfigs
  properties = java.util.Properties.new()
  properties.put("metadata.broker.list", @metadata_broker_list)
  unless @request_required_acks.nil?
    properties.put("request.required.acks", @request_required_acks)
  end
  unless @partitioner_class.nil?
    properties.put("partitioner.class", @partitioner_class)
  end
  unless @key_serializer_class.nil?
    properties.put("key.serializer.class", @key_serializer_class)
  end
  unless @request_timeout_ms.nil?
    properties.put("request.timeout.ms", @request_timeout_ms)
  end
  unless @producer_type.nil?
    properties.put('producer.type', @producer_type)
  end
  unless @serializer_class.nil?
    properties.put("serializer.class", @serializer_class)
  end
  unless @compression_codec.nil?
    properties.put("compression.codec", @compression_codec)
  end
  unless @compressed_topics.nil?
    properties.put("compressed.topics", @compressed_topics)
  end
  unless @message_send_max_retries.nil?
    properties.put("message.send.max.retries", @message_send_max_retries)
  end
  unless @retry_backoff_ms.nil?
    properties.put('retry.backoff.ms', @retry_backoff_ms)
  end
  unless @topic_metadata_refresh_interval_ms.nil?
    properties.put('topic.metadata.refresh.interval.ms', @topic_metadata_refresh_interval_ms)
  end
  unless @queue_buffering_max_ms.nil?
    properties.put('queue.buffering.max.ms', @queue_buffering_max_ms)
  end
  unless @queue_buffering_max_messages.nil?
    properties.put('queue.buffering.max.messages', @queue_buffering_max_messages)
  end
  unless @queue_enqueue_timeout_ms.nil?
    properties.put('queue.enqueue.timeout.ms', @queue_enqueue_timeout_ms)
  end
  unless @batch_num_messages.nil?
    properties.put('batch.num.messages', @batch_num_messages)
  end
  unless @send_buffer_bytes.nil?
    properties.put('send.buffer.bytes', @send_buffer_bytes)
  end
  unless @client_id.nil?
    properties.put('client.id', @client_id)
  end
  return Java::kafka::producer::ProducerConfig.new(properties)
end

#sendMsg(topic, key, msg) ⇒ Object 



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# File 'lib/jruby-kafka/producer.rb', line 135

def sendMsg(topic, key, msg)
  m = Java::kafka::producer::KeyedMessage.new(topic=topic, key=key, message=msg)
  #the send message for a producer is scala varargs, which doesn't seem to play nice w/ jruby
  #  this is the best I could come up with
  ms = Java::scala::collection::immutable::Vector.new(0,0,0)
  ms = ms.append_front(m)
  begin
    @producer.send(ms)
  rescue FailedToSendMessageException => e
    raise KafkaError.new(e), "Got FailedToSendMessageException: #{e}"
  end
end