Class: AMQ::Protocol::Basic

Inherits:
Class
  • Object
show all
Defined in:
lib/amq/protocol/client.rb

Defined Under Namespace

Classes: Ack, Cancel, CancelOk, Consume, ConsumeOk, Deliver, Get, GetEmpty, GetOk, Nack, Publish, Qos, QosOk, Recover, RecoverAsync, RecoverOk, Reject, Return

Constant Summary collapse

PROPERTIES = 
[
  :content_type, # shortstr
  :content_encoding, # shortstr
  :headers, # table
  :delivery_mode, # octet
  :priority, # octet
  :correlation_id, # shortstr
  :reply_to, # shortstr
  :expiration, # shortstr
  :message_id, # shortstr
  :timestamp, # timestamp
  :type, # shortstr
  :user_id, # shortstr
  :app_id, # shortstr
  :cluster_id, # shortstr
]
DECODE_PROPERTIES =

THIS DECODES ONLY FLAGS

{
  0x8000 => :content_type,
  0x4000 => :content_encoding,
  0x2000 => :headers,
  0x1000 => :delivery_mode,
  0x0800 => :priority,
  0x0400 => :correlation_id,
  0x0200 => :reply_to,
  0x0100 => :expiration,
  0x0080 => :message_id,
  0x0040 => :timestamp,
  0x0020 => :type,
  0x0010 => :user_id,
  0x0008 => :app_id,
  0x0004 => :cluster_id,
}
DECODE_PROPERTIES_TYPE = 
{
  0x8000 => :shortstr,
  0x4000 => :shortstr,
  0x2000 => :table,
  0x1000 => :octet,
  0x0800 => :octet,
  0x0400 => :shortstr,
  0x0200 => :shortstr,
  0x0100 => :shortstr,
  0x0080 => :shortstr,
  0x0040 => :timestamp,
  0x0020 => :shortstr,
  0x0010 => :shortstr,
  0x0008 => :shortstr,
  0x0004 => :shortstr,
}
DECODE_PROPERTIES_KEYS =

Hash doesn’t give any guarantees on keys order, we will do it in a straightforward way

[
  0x8000,
  0x4000,
  0x2000,
  0x1000,
  0x0800,
  0x0400,
  0x0200,
  0x0100,
  0x0080,
  0x0040,
  0x0020,
  0x0010,
  0x0008,
  0x0004,
]

Class Method Summary collapse

Methods inherited from Class

classes, inherited, method_id, name

Class Method Details

.decode_properties(data) ⇒ Object

Optimized decode_properties using getbyte and unpack1



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# File 'lib/amq/protocol/client.rb', line 1571

def self.decode_properties(data)
  offset, data_length, properties = 0, data.bytesize, {}

  compressed_index = data.byteslice(offset, 2).unpack1(PACK_UINT16)
  offset += 2
  while data_length > offset
    DECODE_PROPERTIES_KEYS.each do |key|
      next unless compressed_index >= key
      compressed_index -= key
      name = DECODE_PROPERTIES[key] || raise(RuntimeError.new("No property found for index #{key.inspect}!"))
      case DECODE_PROPERTIES_TYPE[key]
      when :shortstr
        size = data.getbyte(offset)
        offset += 1
        result = data.byteslice(offset, size)
      when :octet
        size = 1
        result = data.getbyte(offset)
      when :timestamp
        size = 8
        result = Time.at(data.byteslice(offset, 8).unpack1(PACK_UINT64_BE))
      when :table
        size = 4 + data.byteslice(offset, 4).unpack1(PACK_UINT32)
        result = Table.decode(data.byteslice(offset, size))
      end
      properties[name] = result
      offset += size
    end
  end

  properties
end

.encode_app_id(value) ⇒ Object

1 << 3



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# File 'lib/amq/protocol/client.rb', line 1482

def self.encode_app_id(value)
  buffer = +''
  buffer << value.to_s.bytesize.chr
  buffer << value.to_s
  [12, 0x0008, buffer]
end

.encode_cluster_id(value) ⇒ Object

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# File 'lib/amq/protocol/client.rb', line 1490

def self.encode_cluster_id(value)
  buffer = +''
  buffer << value.to_s.bytesize.chr
  buffer << value.to_s
  [13, 0x0004, buffer]
end

.encode_content_encoding(value) ⇒ Object

1 << 14



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# File 'lib/amq/protocol/client.rb', line 1398

def self.encode_content_encoding(value)
  buffer = +''
  buffer << value.to_s.bytesize.chr
  buffer << value.to_s
  [1, 0x4000, buffer]
end

.encode_content_type(value) ⇒ Object

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# File 'lib/amq/protocol/client.rb', line 1390

def self.encode_content_type(value)
  buffer = +''
  buffer << value.to_s.bytesize.chr
  buffer << value.to_s
  [0, 0x8000, buffer]
end

.encode_correlation_id(value) ⇒ Object

1 << 10



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# File 'lib/amq/protocol/client.rb', line 1427

def self.encode_correlation_id(value)
  buffer = +''
  buffer << value.to_s.bytesize.chr
  buffer << value.to_s
  [5, 0x0400, buffer]
end

.encode_delivery_mode(value) ⇒ Object

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# File 'lib/amq/protocol/client.rb', line 1413

def self.encode_delivery_mode(value)
  buffer = +''
  buffer << [value].pack(PACK_CHAR)
  [3, 0x1000, buffer]
end

.encode_expiration(value) ⇒ Object

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# File 'lib/amq/protocol/client.rb', line 1443

def self.encode_expiration(value)
  buffer = +''
  buffer << value.to_s.bytesize.chr
  buffer << value.to_s
  [7, 0x0100, buffer]
end

.encode_headers(value) ⇒ Object

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# File 'lib/amq/protocol/client.rb', line 1406

def self.encode_headers(value)
  buffer = +''
  buffer << AMQ::Protocol::Table.encode(value)
  [2, 0x2000, buffer]
end

.encode_message_id(value) ⇒ Object

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# File 'lib/amq/protocol/client.rb', line 1451

def self.encode_message_id(value)
  buffer = +''
  buffer << value.to_s.bytesize.chr
  buffer << value.to_s
  [8, 0x0080, buffer]
end

.encode_priority(value) ⇒ Object

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# File 'lib/amq/protocol/client.rb', line 1420

def self.encode_priority(value)
  buffer = +''
  buffer << [value].pack(PACK_CHAR)
  [4, 0x0800, buffer]
end

.encode_properties(body_size, properties) ⇒ Object 



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# File 'lib/amq/protocol/client.rb', line 1499

def self.encode_properties(body_size, properties)
  pieces, flags = [], 0

  properties.reject {|key, value| value.nil?}.each do |key, value|
    i, f, result = self.__send__(:"encode_#{key}", value)
    flags |= f
    pieces[i] = result
  end

  # result = [60, 0, body_size, flags].pack('n2Qn')
  result = [60, 0].pack(PACK_UINT16_X2)
  result += AMQ::Pack.pack_uint64_big_endian(body_size)
  result += [flags].pack(PACK_UINT16)
  pieces_joined = pieces.join(EMPTY_STRING)
  result.force_encoding(pieces_joined.encoding) + pieces_joined
end

.encode_reply_to(value) ⇒ Object

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# File 'lib/amq/protocol/client.rb', line 1435

def self.encode_reply_to(value)
  buffer = +''
  buffer << value.to_s.bytesize.chr
  buffer << value.to_s
  [6, 0x0200, buffer]
end

.encode_timestamp(value) ⇒ Object

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# File 'lib/amq/protocol/client.rb', line 1459

def self.encode_timestamp(value)
  buffer = +''
  buffer << AMQ::Pack.pack_uint64_big_endian(value)
  [9, 0x0040, buffer]
end

.encode_type(value) ⇒ Object

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# File 'lib/amq/protocol/client.rb', line 1466

def self.encode_type(value)
  buffer = +''
  buffer << value.to_s.bytesize.chr
  buffer << value.to_s
  [10, 0x0020, buffer]
end

.encode_user_id(value) ⇒ Object

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# File 'lib/amq/protocol/client.rb', line 1474

def self.encode_user_id(value)
  buffer = +''
  buffer << value.to_s.bytesize.chr
  buffer << value.to_s
  [11, 0x0010, buffer]
end