Class: ThreadSafe::Cache

Inherits:
ConcurrentCacheBackend show all
Defined in:
lib/skylight/vendor/thread_safe.rb

Constant Summary collapse

KEY_ERROR =

there is no KeyError in 1.8 mode

defined?(KeyError) ? KeyError : IndexError

Instance Method Summary collapse

Constructor Details

#initialize(options = nil, &block) ⇒ Cache

Returns a new instance of Cache.



12
13
14
15
16
17
18
19
20
21
 
# File 'lib/skylight/vendor/thread_safe.rb', line 12

def initialize(options = nil, &block)
  if options.kind_of?(::Hash)
    validate_options_hash!(options)
  else
    options = nil
  end

  super(options)
  @default_proc = block
end

Instance Method Details

#[](key) ⇒ Object 



23
24
25
26
27
28
29
30
31
 
# File 'lib/skylight/vendor/thread_safe.rb', line 23

def [](key)
  if value = super
    value
  elsif @default_proc && !key?(key)
    @default_proc.call(self, key)
  else
    value
  end
end

#each_key ⇒ Object 



73
74
75
 
# File 'lib/skylight/vendor/thread_safe.rb', line 73

def each_key
  each_pair {|k, v| yield k}
end

#each_value ⇒ Object 



77
78
79
 
# File 'lib/skylight/vendor/thread_safe.rb', line 77

def each_value
  each_pair {|k, v| yield v}
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


81
82
83
84
 
# File 'lib/skylight/vendor/thread_safe.rb', line 81

def empty?
  each_pair {|k, v| return false}
  true
end

#fetch(key, default_value = NULL) ⇒ Object 



33
34
35
36
37
38
39
40
41
42
43
 
# File 'lib/skylight/vendor/thread_safe.rb', line 33

def fetch(key, default_value = NULL)
  if NULL != (value = get_or_default(key, NULL))
    value
  elsif block_given?
    yield key
  elsif NULL != default_value
    default_value
  else
    raise KEY_ERROR, 'key not found'
  end
end

#keys ⇒ Object 



61
62
63
64
65
 
# File 'lib/skylight/vendor/thread_safe.rb', line 61

def keys
  arr = []
  each_pair {|k, v| arr << k}
  arr
end

#marshal_dump ⇒ Object

Raises:

  • (TypeError) 


92
93
94
95
96
97
 
# File 'lib/skylight/vendor/thread_safe.rb', line 92

def marshal_dump
  raise TypeError, "can't dump hash with default proc" if @default_proc
  h = {}
  each_pair {|k, v| h[k] = v}
  h
end

#marshal_load(hash) ⇒ Object 



99
100
101
102
 
# File 'lib/skylight/vendor/thread_safe.rb', line 99

def marshal_load(hash)
  initialize
  populate_from(hash)
end

#put_if_absent(key, value) ⇒ Object 



45
46
47
48
49
50
51
52
 
# File 'lib/skylight/vendor/thread_safe.rb', line 45

def put_if_absent(key, value)
  computed = false
  result = compute_if_absent(key) do
    computed = true
    value
  end
  computed ? nil : result
end

#size ⇒ Object 



86
87
88
89
90
 
# File 'lib/skylight/vendor/thread_safe.rb', line 86

def size
  count = 0
  each_pair {|k, v| count += 1}
  count
end

#value?(value) ⇒ Boolean

Returns:

  • (Boolean) 


54
55
56
57
58
59
 
# File 'lib/skylight/vendor/thread_safe.rb', line 54

def value?(value)
  each_value do |v|
    return true if value.equal?(v)
  end
  false
end

#values ⇒ Object 



67
68
69
70
71
 
# File 'lib/skylight/vendor/thread_safe.rb', line 67

def values
  arr = []
  each_pair {|k, v| arr << v}
  arr
end