Class: Kafka::Protocol::Message

Inherits:
Object
  • Object
show all
Defined in:
lib/kafka/protocol/message.rb

Overview

API Specification

Message => Crc MagicByte Attributes Key Value
    Crc => int32
    MagicByte => int8
    Attributes => int8
    Key => bytes
    Value => bytes

Constant Summary collapse

MAGIC_BYTE = 
0

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(key:, value:, attributes: 0) ⇒ Message

Returns a new instance of Message.



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# File 'lib/kafka/protocol/message.rb', line 21

def initialize(key:, value:, attributes: 0)
  @key = key
  @value = value
  @attributes = attributes
end

Instance Attribute Details

#attributes ⇒ Object (readonly)

Returns the value of attribute attributes.



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# File 'lib/kafka/protocol/message.rb', line 19

def attributes
  @attributes
end

#key ⇒ Object (readonly)

Returns the value of attribute key.



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# File 'lib/kafka/protocol/message.rb', line 19

def key
  @key
end

#value ⇒ Object (readonly)

Returns the value of attribute value.



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# File 'lib/kafka/protocol/message.rb', line 19

def value
  @value
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/kafka/protocol/message.rb', line 35

def ==(other)
  @key == other.key && @value == other.value && @attributes == other.attributes
end

#encode(encoder) ⇒ Object 



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# File 'lib/kafka/protocol/message.rb', line 27

def encode(encoder)
  data = encode_without_crc
  crc = Zlib.crc32(data)

  encoder.write_int32(crc)
  encoder.write(data)
end