Module: Kafkr::Producer

Defined in:
lib/kafkr/producer.rb

Constant Summary collapse

MESSAGE_QUEUE = 
"./.kafkr/message_queue.txt"
@@file_mutex = 
Mutex.new

Class Method Summary collapse

Class Method Details

.configuration ⇒ Object 



14
15
16
17
18
19
20
21
22
 
# File 'lib/kafkr/producer.rb', line 14

def self.configuration
  FileUtils.mkdir_p "./.kafkr"
  @configuration ||= OpenStruct.new
  @configuration.queue_file = MESSAGE_QUEUE
  @configuration.message_queue = []
  load_queue_from_file
  @configuration.is_json = false
  @configuration
end

.configure ⇒ Object 



24
25
26
27
28
 
# File 'lib/kafkr/producer.rb', line 24

def self.configure
  yield(configuration)
rescue => e
  logger.error("Configuration error: #{e.message}")
end

.send_message(message) ⇒ Object 



52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
 
# File 'lib/kafkr/producer.rb', line 52

def self.send_message(message)
  return if message.nil? || message.empty?

  uuid = SecureRandom.uuid
  message_with_uuid = nil

  if Kafkr::Producer.configuration.is_json
    json_message = JSON.parse(message)
    json_message["uuid"] = uuid
    message_with_uuid = JSON.dump(json_message)
  else
    if message.is_a? String
      message = structured_data_to_hash(input: message, sync_uid: uuid)
      message_with_uuid = "#{uuid}: #{message}"
    end

    if message.is_a?(Hash)
      message_with_uuid = "#{uuid}: #{JSON.generate(message)}"
    end
  end

  encrypted_message_with_uuid = Kafkr::Encryptor.new.encrypt(message_with_uuid)

  begin
    socket = TCPSocket.new(@configuration.host, @configuration.port)
    send_queued_messages(socket)
    socket.puts(encrypted_message_with_uuid)
  rescue Errno::ECONNREFUSED
    puts "Connection refused. Queuing message: #{encrypted_message_with_uuid}"
    @configuration.message_queue.push(encrypted_message_with_uuid)
    save_queue_to_file
  rescue Errno::EPIPE
    puts "Broken pipe error. Retrying connection..."
    retry_connection(encrypted_message_with_uuid)
  end

  uuid
end

.send_message_and_wait(message) ⇒ Object 



91
92
93
94
95
96
97
 
# File 'lib/kafkr/producer.rb', line 91

def self.send_message_and_wait(message)
  Consumer.new.listen_for(message, method(:send_message)) do |received_message, sync_uid|
    if received_message.key? "reply" and received_message["reply"].dig("uuid") == sync_uid
      received_message["reply"].dig("payload")
    end
  end
end

.structured_data_to_hash(input:, sync_uid:) ⇒ Object 



30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
 
# File 'lib/kafkr/producer.rb', line 30

def self.structured_data_to_hash(input:, sync_uid:)
  unless /\A\w+\s*(=>|<=>)\s*((\w+:\s*['"]?[^'",]*['"]?,\s*)*(\w+:\s*['"]?[^'",]*['"]?)\s*)\z/.match?(input)
    return input
  end

  if input.include?("<=>")
    type, key_values_str = input.split("<=>").map(&:strip)
    key_values = key_values_str.scan(/(\w+):\s*['"]?([^'",]*)['"]?/)
    hash_body = key_values.to_h do |key, value|
      [key.to_sym, value.strip.gsub(/\A['"]|['"]\z/, "")]
    end
    {type.to_sym => hash_body, :sync => true, :sync_uid => sync_uid}
  else
    type, key_values_str = input.split("=>").map(&:strip)
    key_values = key_values_str.scan(/(\w+):\s*['"]?([^'",]*)['"]?/)
    hash_body = key_values.to_h do |key, value|
      [key.to_sym, value.strip.gsub(/\A['"]|['"]\z/, "")]
    end
    {type.to_sym => hash_body}
  end
end