Module: ObjectTracker

Defined in:
lib/object_tracker.rb,
lib/object_tracker/version.rb

Defined Under Namespace

Classes: UntrackableMethod

Constant Summary collapse

VERSION = 
'1.0.2'.freeze

Instance Method Summary collapse

Instance Method Details

#cleanse(str) ⇒ Object

PRIVATE



46
47
48
 
# File 'lib/object_tracker.rb', line 46

def cleanse(str)
  str.to_s.sub(/^[#.]/, '')
end

#track(*args) ⇒ Object 



6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
 
# File 'lib/object_tracker.rb', line 6

def track(*args)
  args.each do |method_name|
    next if tracking?(method_name) || track_reserved_methods.include?(method_name)
    if respond_to?(method_name)
      track!(method_name => track_with_source(self, method_name))
    elsif respond_to?(:allocate)
      inst = allocate
      if inst.respond_to?(method_name)
        track!(method_name => track_with_source(inst, method_name))
      else
        fail UntrackableMethod, method_name
      end
    else
      fail UntrackableMethod, method_name
    end
  end
  nil
end

#track!(method_names = nil) ⇒ Object 



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
 
# File 'lib/object_tracker.rb', line 50

def track!(method_names = nil)
  mod = Module.new
  Array(method_names || tracking).each do |method_name, source_def|
    mod.module_eval <<-RUBY, __FILE__, __LINE__
      def #{cleanse(method_name)}(*args, &block)
        msg = %Q(   * called "#{method_name}" )
        msg << "with " << args.join(', ') << " " if args.any?
        msg << "[#{source_def}]"
        puts msg
        super
      rescue NoMethodError => e
        raise e if e.message !~ /no superclass/
      end
    RUBY
  end

  mod.module_eval <<-RUBY, __FILE__, __LINE__
    def self.prepended(base)
      base.extend(self)
    end
  RUBY

  # Handle both instance and class level extension
  if respond_to?(:prepend)
    prepend(mod)
  else
    extend(mod)
  end
end

#track_all! ⇒ Object 



36
37
38
39
40
 
# File 'lib/object_tracker.rb', line 36

def track_all!
  track_methods_for(self)
  track_methods_for(allocate) if respond_to?(:allocate)
  track!
end

#track_methods_for(obj) ⇒ Object 



80
81
82
83
84
 
# File 'lib/object_tracker.rb', line 80

def track_methods_for(obj)
  (obj.methods - track_reserved_methods).each do |method_name|
    track_with_source(obj, method_name)
  end
end

#track_not(*args) ⇒ Object 



29
30
31
32
33
34
 
# File 'lib/object_tracker.rb', line 29

def track_not(*args)
  args.each do |method_name|
    track_reserved_methods << method_name unless track_reserved_methods.include?(method_name)
  end
  nil
end

#track_reserved_methods ⇒ Object 



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
 
# File 'lib/object_tracker.rb', line 96

def track_reserved_methods
  @__reserved_methods ||= [
    :!,
    :!=,
    :!~,
    :<,
    :<=,
    :<=>,
    :==,
    :===,
    :=~,
    :>,
    :>=,
    :[],
    :[]=,
    :__id__,
    :__send__,
    :`,
    :public_send,
    :send,
    :class,
    :object_id,
    :track,
    :tracking?,
    :track_not,
    :track_all!,
    :track!,
    :track_methods_for,
    :track_with_source,
    :tracking,
    :track_reserved_methods
  ]
end

#track_with_source(obj, method_name) ⇒ Object 



86
87
88
89
90
 
# File 'lib/object_tracker.rb', line 86

def track_with_source(obj, method_name)
  source = obj.method(method_name).source_location || ['RUBY CORE']
  prefix = obj.class == Class ? '.' : '#'
  tracking["#{prefix}#{method_name}".to_sym] = source.join(':').split('/').last(5).join('/')
end

#tracking ⇒ Object 



92
93
94
 
# File 'lib/object_tracker.rb', line 92

def tracking
  @__tracking ||= {}
end

#tracking?(method_name) ⇒ Boolean

Returns:

  • (Boolean) 


25
26
27
 
# File 'lib/object_tracker.rb', line 25

def tracking?(method_name)
  tracking.keys.include?(cleanse(method_name).to_sym)
end