class Concurrent::Collection::NonConcurrentMapBackend

@!visibility private

Public Class Methods

new(options = nil, &default_proc) click to toggle source

WARNING: all public methods of the class must operate on the @backend directly without calling each other. This is important because of the SynchronizedMapBackend which uses a non-reentrant mutex for performance reasons.

# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 15
def initialize(options = nil, &default_proc)
  validate_options_hash!(options) if options.kind_of?(::Hash)
  set_backend(default_proc)
  @default_proc = default_proc
end

Public Instance Methods

[](key) click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 21
def [](key)
  @backend[key]
end
[]=(key, value) click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 25
def []=(key, value)
  @backend[key] = value
end
clear() click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 94
def clear
  @backend.clear
  self
end
compute(key) { |get_or_default(key, nil)| ... } click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 59
def compute(key)
  store_computed_value(key, yield(get_or_default(key, nil)))
end
compute_if_absent(key) { || ... } click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 29
def compute_if_absent(key)
  if NULL != (stored_value = @backend.fetch(key, NULL))
    stored_value
  else
    @backend[key] = yield
  end
end
compute_if_present(key) { |stored_value| ... } click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 53
def compute_if_present(key)
  if NULL != (stored_value = @backend.fetch(key, NULL))
    store_computed_value(key, yield(stored_value))
  end
end
delete(key) click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 81
def delete(key)
  @backend.delete(key)
end
delete_pair(key, value) click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 85
def delete_pair(key, value)
  if pair?(key, value)
    @backend.delete(key)
    true
  else
    false
  end
end
each_pair() { |k, v| ... } click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 99
def each_pair
  dupped_backend.each_pair do |k, v|
    yield k, v
  end
  self
end
get_and_set(key, value) click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 71
def get_and_set(key, value)
  stored_value = get_or_default(key, nil)
  @backend[key] = value
  stored_value
end
get_or_default(key, default_value) click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 110
def get_or_default(key, default_value)
  @backend.fetch(key, default_value)
end
key?(key) click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 77
def key?(key)
  @backend.key?(key)
end
merge_pair(key, value) { |stored_value| ... } click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 63
def merge_pair(key, value)
  if NULL == (stored_value = @backend.fetch(key, NULL))
    @backend[key] = value
  else
    store_computed_value(key, yield(stored_value))
  end
end
replace_if_exists(key, new_value) click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 46
def replace_if_exists(key, new_value)
  if NULL != (stored_value = @backend.fetch(key, NULL))
    @backend[key] = new_value
    stored_value
  end
end
replace_pair(key, old_value, new_value) click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 37
def replace_pair(key, old_value, new_value)
  if pair?(key, old_value)
    @backend[key] = new_value
    true
  else
    false
  end
end
size() click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 106
def size
  @backend.size
end

Private Instance Methods

dupped_backend() click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 130
def dupped_backend
  @backend.dup
end
initialize_copy(other) click to toggle source
Calls superclass method
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 124
def initialize_copy(other)
  super
  set_backend(@default_proc)
  self
end
pair?(key, expected_value) click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 134
def pair?(key, expected_value)
  NULL != (stored_value = @backend.fetch(key, NULL)) && expected_value.equal?(stored_value)
end
set_backend(default_proc) click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 116
def set_backend(default_proc)
  if default_proc
    @backend = ::Hash.new { |_h, key| default_proc.call(self, key) }
  else
    @backend = {}
  end
end
store_computed_value(key, new_value) click to toggle source
# File lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb, line 138
def store_computed_value(key, new_value)
  if new_value.nil?
    @backend.delete(key)
    nil
  else
    @backend[key] = new_value
  end
end