1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
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
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
# frozen_string_literal: true
require "active_support/core_ext/hash"
module ActiveJob
# Raised when an exception is raised during job arguments deserialization.
#
# Wraps the original exception raised as +cause+.
class DeserializationError < StandardError
def initialize #:nodoc:
super("Error while trying to deserialize arguments: #{$!.message}")
set_backtrace $!.backtrace
end
end
# Raised when an unsupported argument type is set as a job argument. We
# currently support NilClass, Integer, Float, String, TrueClass, FalseClass,
# BigDecimal, and objects that can be represented as GlobalIDs (ex: Active Record).
# Raised if you set the key for a Hash something else than a string or
# a symbol. Also raised when trying to serialize an object which can't be
# identified with a Global ID - such as an unpersisted Active Record model.
class SerializationError < ArgumentError; end
module Arguments
extend self
# :nodoc:
PERMITTED_TYPES = [ NilClass, String, Integer, Float, BigDecimal, TrueClass, FalseClass ]
# Serializes a set of arguments. Intrinsic types that can safely be
# serialized without mutation are returned as-is. Arrays/Hashes are
# serialized element by element. All other types are serialized using
# GlobalID.
def serialize(arguments)
arguments.map { |argument| serialize_argument(argument) }
end
# Deserializes a set of arguments. Instrinsic types that can safely be
# deserialized without mutation are returned as-is. Arrays/Hashes are
# deserialized element by element. All other types are deserialized using
# GlobalID.
def deserialize(arguments)
arguments.map { |argument| deserialize_argument(argument) }
rescue
raise DeserializationError
end
private
# :nodoc:
GLOBALID_KEY = "_aj_globalid".freeze
# :nodoc:
SYMBOL_KEYS_KEY = "_aj_symbol_keys".freeze
# :nodoc:
WITH_INDIFFERENT_ACCESS_KEY = "_aj_hash_with_indifferent_access".freeze
# :nodoc:
OBJECT_SERIALIZER_KEY = "_aj_serialized"
# :nodoc:
RESERVED_KEYS = [
GLOBALID_KEY, GLOBALID_KEY.to_sym,
SYMBOL_KEYS_KEY, SYMBOL_KEYS_KEY.to_sym,
OBJECT_SERIALIZER_KEY, OBJECT_SERIALIZER_KEY.to_sym,
WITH_INDIFFERENT_ACCESS_KEY, WITH_INDIFFERENT_ACCESS_KEY.to_sym,
]
private_constant :RESERVED_KEYS
def serialize_argument(argument)
case argument
when *PERMITTED_TYPES
argument
when GlobalID::Identification
convert_to_global_id_hash(argument)
when Array
argument.map { |arg| serialize_argument(arg) }
when ActiveSupport::HashWithIndifferentAccess
result = serialize_hash(argument)
result[WITH_INDIFFERENT_ACCESS_KEY] = serialize_argument(true)
result
when Hash
symbol_keys = argument.each_key.grep(Symbol).map(&:to_s)
result = serialize_hash(argument)
result[SYMBOL_KEYS_KEY] = symbol_keys
result
else
Serializers.serialize(argument)
end
end
def deserialize_argument(argument)
case argument
when String
GlobalID::Locator.locate(argument) || argument
when *PERMITTED_TYPES
argument
when Array
argument.map { |arg| deserialize_argument(arg) }
when Hash
if serialized_global_id?(argument)
deserialize_global_id argument
elsif custom_serialized?(argument)
Serializers.deserialize(argument)
else
deserialize_hash(argument)
end
else
raise ArgumentError, "Can only deserialize primitive arguments: #{argument.inspect}"
end
end
def serialized_global_id?(hash)
hash.size == 1 && hash.include?(GLOBALID_KEY)
end
def deserialize_global_id(hash)
GlobalID::Locator.locate hash[GLOBALID_KEY]
end
def custom_serialized?(hash)
hash.key?(OBJECT_SERIALIZER_KEY)
end
def serialize_hash(argument)
argument.each_with_object({}) do |(key, value), hash|
hash[serialize_hash_key(key)] = serialize_argument(value)
end
end
def deserialize_hash(serialized_hash)
result = serialized_hash.transform_values { |v| deserialize_argument(v) }
if result.delete(WITH_INDIFFERENT_ACCESS_KEY)
result = result.with_indifferent_access
elsif symbol_keys = result.delete(SYMBOL_KEYS_KEY)
result = transform_symbol_keys(result, symbol_keys)
end
result
end
def serialize_hash_key(key)
case key
when *RESERVED_KEYS
raise SerializationError.new("Can't serialize a Hash with reserved key #{key.inspect}")
when String, Symbol
key.to_s
else
raise SerializationError.new("Only string and symbol hash keys may be serialized as job arguments, but #{key.inspect} is a #{key.class}")
end
end
def transform_symbol_keys(hash, symbol_keys)
hash.transform_keys do |key|
if symbol_keys.include?(key)
key.to_sym
else
key
end
end
end
def convert_to_global_id_hash(argument)
{ GLOBALID_KEY => argument.to_global_id.to_s }
rescue URI::GID::MissingModelIdError
raise SerializationError, "Unable to serialize #{argument.class} " \
"without an id. (Maybe you forgot to call save?)"
end
end
end
|