Class: Message::PulsarClient

Inherits:
Object
  • Object
show all
Defined in:
lib/fluent/plugin/lib/pulsar_client/PulsarClient.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ PulsarClient

Returns a new instance of PulsarClient.



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# File 'lib/fluent/plugin/lib/pulsar_client/PulsarClient.rb', line 37

def initialize()
  @client_created_id = 1
  @request_id = 1
  @producer_id = 1
end

Instance Method Details

#ack(consumer_id, ledgerId, entryId) ⇒ Object 



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# File 'lib/fluent/plugin/lib/pulsar_client/PulsarClient.rb', line 370

def ack(consumer_id, ledgerId, entryId)
  command_ack(consumer_id, ledgerId, entryId)
end

#close ⇒ Object 



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# File 'lib/fluent/plugin/lib/pulsar_client/PulsarClient.rb', line 344

def close()
  close_socket()
end

#close_socket ⇒ Object 



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# File 'lib/fluent/plugin/lib/pulsar_client/PulsarClient.rb', line 49

def close_socket()
  @sock.close
end

#command_ack(consumer_id, ledgerId, entryId) ⇒ Object 



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# File 'lib/fluent/plugin/lib/pulsar_client/PulsarClient.rb', line 318

def command_ack(consumer_id, ledgerId, entryId)
  base_command = Pulsar::Proto::BaseCommand.new(
      :type => Pulsar::Proto::BaseCommand::Type::ACK
    )

  base_command.ack = Pulsar::Proto::CommandAck.new
  base_command.ack.consumer_id = consumer_id
  base_command.ack.ack_type = Pulsar::Proto::CommandAck::AckType::Individual
  base_command.ack.message_id = [Pulsar::Proto::MessageIdData.new(
      :ledgerId => ledgerId,
      :entryId => entryId
  )]
  byte_cmd = base_command.serialize_to_string()
  total_length = byte_cmd.length + 4

  total_frame = [total_length].pack('N') + [byte_cmd.length].pack('N') + byte_cmd

  @sock.write(total_frame)

end

#command_connect ⇒ Object 



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# File 'lib/fluent/plugin/lib/pulsar_client/PulsarClient.rb', line 53

def command_connect()
  base_command = Pulsar::Proto::BaseCommand.new(
      :type => Pulsar::Proto::BaseCommand::Type::CONNECT
    )

  base_command.connect = Pulsar::Proto::CommandConnect.new
  base_command.connect.client_version  = "ruby-client-0.0.2"
  base_command.connect.protocol_version  = 6

  byte_cmd = base_command.serialize_to_string()
  total_length = byte_cmd.length + 4

  total_frame = [total_length].pack('N') + [byte_cmd.length].pack('N') + byte_cmd

  @sock.write(total_frame)

  recv_length = @sock.read(4).unpack('N')[0]

  recv_cmd_length = @sock.read(4).unpack('N')[0]

  recv_cmd_byte = @sock.read(recv_cmd_length)
  
  recv_cmd = Pulsar::Proto::BaseCommand.new
  recv_cmd.parse_from_string(recv_cmd_byte)


  if recv_cmd.type == Pulsar::Proto::BaseCommand::Type::CONNECTED then
    return true
  else
    return false
  end
end

#command_flow ⇒ Object 



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# File 'lib/fluent/plugin/lib/pulsar_client/PulsarClient.rb', line 252

def command_flow()
  base_command = Pulsar::Proto::BaseCommand.new(
      :type => Pulsar::Proto::BaseCommand::Type::FLOW
    )

  base_command.flow = Pulsar::Proto::CommandFlow.new
  base_command.flow.consumer_id = @client_created_id
  base_command.flow.messagePermits = 1000

  byte_cmd = base_command.serialize_to_string()
  total_length = byte_cmd.length + 4

  total_frame = [total_length].pack('N') + [byte_cmd.length].pack('N') + byte_cmd

  @sock.write(total_frame)

end

#command_lookup(topic) ⇒ Object 



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# File 'lib/fluent/plugin/lib/pulsar_client/PulsarClient.rb', line 169

def command_lookup(topic)

  base_command = Pulsar::Proto::BaseCommand.new(
      :type => Pulsar::Proto::BaseCommand::Type::LOOKUP
    )

  base_command.lookupTopic = Pulsar::Proto::CommandLookupTopic.new
  base_command.lookupTopic.topic = topic
  base_command.lookupTopic.request_id = @request_id

  byte_cmd = base_command.serialize_to_string()
  total_length = byte_cmd.length + 4

  total_frame = [total_length].pack('N') + [byte_cmd.length].pack('N') + byte_cmd

  @sock.write(total_frame)

  recv_length = @sock.read(4).unpack('N')[0]

  recv_cmd_length = @sock.read(4).unpack('N')[0]

  recv_cmd_byte = @sock.read(recv_cmd_length)
  
  recv_cmd = Pulsar::Proto::BaseCommand.new
  recv_cmd.parse_from_string(recv_cmd_byte)


  if recv_cmd.type == Pulsar::Proto::BaseCommand::Type::LOOKUP_RESPONSE then
    return true
  else
    print("type:" + recv_cmd.type.to_s + "\n")
    return false
  end
end

#command_message ⇒ Object 



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# File 'lib/fluent/plugin/lib/pulsar_client/PulsarClient.rb', line 270

def command_message()
  
  recv_length = @sock.read(4).unpack('N')[0]

  recv_cmd_length = @sock.read(4).unpack('N')[0]

  recv_cmd_byte = @sock.read(recv_cmd_length)
  
  recv_cmd = Pulsar::Proto::BaseCommand.new
  recv_cmd.parse_from_string(recv_cmd_byte)

  if recv_cmd.type == Pulsar::Proto::BaseCommand::Type::MESSAGE then

    consumer_id = recv_cmd.message.consumer_id
    ledgerId = recv_cmd.message.message_id.ledgerId
    entryId = recv_cmd.message.message_id.entryId
    
    recv_meta_length = 0
    recv_meta_byte = nil

    recv_magic = @sock.read(2)
    if recv_magic == [0x0e, 0x01].pack('C*') then
      recv_crc = @sock.read(4)
    
      recv_meta_length = @sock.read(4).unpack('N')[0]
      recv_meta_byte = @sock.read(recv_meta_length)
    else
      recv_remain = @sock.read(2)
      recv_meta_length = (recv_magic + recv_remain).unpack('N')[0]
      recv_meta_byte = @sock.read(recv_meta_length)
    end

    payload_length = recv_length - (4 + recv_cmd_length + 4 + recv_meta_length)
    
    message = @sock.read(payload_length)  

    recv_message = PulsarMessage.new
    recv_message.client_created_id = consumer_id
    recv_message.message_ledger_id = ledgerId
    recv_message.message_entry_id = entryId
    recv_message.message = message

    return recv_message
  end

end

#command_producer(topic) ⇒ Object 



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# File 'lib/fluent/plugin/lib/pulsar_client/PulsarClient.rb', line 86

def command_producer(topic)
  base_command = Pulsar::Proto::BaseCommand.new(
      :type => Pulsar::Proto::BaseCommand::Type::PRODUCER
    )

  base_command.producer = Pulsar::Proto::CommandProducer.new
  base_command.producer.topic = topic
  base_command.producer.producer_id = @producer_id
  base_command.producer.request_id = @request_id


  byte_cmd = base_command.serialize_to_string()
  total_length = byte_cmd.length + 4

  total_frame = [total_length].pack('N') + [byte_cmd.length].pack('N') + byte_cmd

  @sock.write(total_frame)

  recv_length = @sock.read(4).unpack('N')[0]

  recv_cmd_length = @sock.read(4).unpack('N')[0]

  recv_cmd_byte = @sock.read(recv_cmd_length)
  
  recv_cmd = Pulsar::Proto::BaseCommand.new
  recv_cmd.parse_from_string(recv_cmd_byte)

  if recv_cmd.type == Pulsar::Proto::BaseCommand::Type::PRODUCER_SUCCESS then
    return true 
  else
    return false  
  end
end

#command_send(producer_name, num_messages, message) ⇒ Object 



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# File 'lib/fluent/plugin/lib/pulsar_client/PulsarClient.rb', line 120

def command_send(producer_name, num_messages, message)
  base_command = Pulsar::Proto::BaseCommand.new(
      :type => Pulsar::Proto::BaseCommand::Type::SEND
    )

  base_command.send = Pulsar::Proto::CommandSend.new
  base_command.send.producer_id = @producer_id
  base_command.send.sequence_id = 0
  base_command.send.num_messages = num_messages

  byte_cmd = base_command.serialize_to_string()


  magic_number= [0x0e, 0x01].pack('C*')
  metadata = Pulsar::Proto::MessageMetadata.new
  metadata.producer_name = producer_name
  metadata.sequence_id = 0
  metadata.publish_time = Time.now.to_i * 1000

  byte_meta = metadata.serialize_to_string()

  meta_payload = [byte_meta.length].pack('N') + byte_meta + message.bytes.pack('C*')

  crc = Digest::CRC32c.new
  crc << meta_payload
  checksum = crc.checksum

  total_length = 4 + byte_cmd.length + 6 + meta_payload.length

  total_frame = [total_length].pack('N') + [byte_cmd.length].pack('N') + byte_cmd + magic_number + [checksum].pack('N') + meta_payload

  @sock.write(total_frame)

  recv_length = @sock.read(4).unpack('N')[0]

  recv_cmd_length = @sock.read(4).unpack('N')[0]

  recv_cmd_byte = @sock.read(recv_cmd_length)
  
  recv_cmd = Pulsar::Proto::BaseCommand.new
  recv_cmd.parse_from_string(recv_cmd_byte)

  if recv_cmd.type == Pulsar::Proto::BaseCommand::Type::PRODUCER_SUCCESS then
    return true
  else
    return false
  end
end

#command_subscribe(topic, subscription, sub_type) ⇒ Object 



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# File 'lib/fluent/plugin/lib/pulsar_client/PulsarClient.rb', line 204

def command_subscribe(topic, subscription, sub_type)
  base_command = Pulsar::Proto::BaseCommand.new(
      :type => Pulsar::Proto::BaseCommand::Type::SUBSCRIBE
    )

  base_command.subscribe = Pulsar::Proto::CommandSubscribe.new
  base_command.subscribe.topic = topic
  base_command.subscribe.subscription = subscription

  if sub_type == 1 then
    base_command.subscribe.subType = Pulsar::Proto::CommandSubscribe::SubType::Exclusive
  elsif sub_type == 2 then
    base_command.subscribe.subType = Pulsar::Proto::CommandSubscribe::SubType::Shared
  elsif sub_type == 3 then
    base_command.subscribe.subType = Pulsar::Proto::CommandSubscribe::SubType::Failover
  end  

  base_command.subscribe.consumer_id = @client_created_id
  base_command.subscribe.request_id = @request_id


  byte_cmd = base_command.serialize_to_string()
  total_length = byte_cmd.length + 4

  total_frame = [total_length].pack('N') + [byte_cmd.length].pack('N') + byte_cmd

  @sock.write(total_frame)

  recv_length = @sock.read(4).unpack('N')[0]

  recv_cmd_length = @sock.read(4).unpack('N')[0]

  recv_cmd_byte = @sock.read(recv_cmd_length)
  
  recv_cmd = Pulsar::Proto::BaseCommand.new
  recv_cmd.parse_from_string(recv_cmd_byte)


  if recv_cmd.type == Pulsar::Proto::BaseCommand::Type::CONNECTED then
    return true
  elsif recv_cmd.type == Pulsar::Proto::BaseCommand::Type::SUCCESS then
    return true 
  else
    print("type:" + recv_cmd.type.to_s + "\n")
    return false
  end
end

#connect(host, port) ⇒ Object 



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# File 'lib/fluent/plugin/lib/pulsar_client/PulsarClient.rb', line 339

def connect(host, port)
  connect_socket(host, port)
  command_connect()
end

#connect_socket(host, port) ⇒ Object 



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# File 'lib/fluent/plugin/lib/pulsar_client/PulsarClient.rb', line 43

def connect_socket(host, port)
  @sock = Socket.new(Socket::AF_INET, Socket::SOCK_STREAM, 0)
  sockaddr = Socket.sockaddr_in(port, host)
  @sock.connect(sockaddr)  
end

#get_message ⇒ Object 



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# File 'lib/fluent/plugin/lib/pulsar_client/PulsarClient.rb', line 365

def get_message()
  m = command_message()
  return m 
end

#send(topic, producer_name, num_messages, message) ⇒ Object 



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# File 'lib/fluent/plugin/lib/pulsar_client/PulsarClient.rb', line 348

def send(topic, producer_name, num_messages, message)
  s = command_producer(topic)

  # try again
  if s == false then
    command_lookup(topic)
    command_producer(topic)
  end
  command_send(producer_name, num_messages, message)
end

#subscribe(topic, subscription, sub_type) ⇒ Object 



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# File 'lib/fluent/plugin/lib/pulsar_client/PulsarClient.rb', line 359

def subscribe(topic, subscription, sub_type)
  command_lookup(topic)
  command_subscribe(topic, subscription, sub_type)
  command_flow()
end