Class: Message::PulsarClient

Inherits:
Object
  • Object
show all
Defined in:
lib/fluent/plugin/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/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/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/pulsar_client/PulsarClient.rb', line 344

def close()
	close_socket()
end

#close_socket ⇒ Object 



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

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