class ThreadSafe::NonConcurrentCacheBackend
Public Class Methods
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 7 def initialize(options = nil) @backend = {} end
WARNING: all public methods of the class must operate on the @backend directly without calling each other. This is important because of the SynchronizedCacheBackend
which uses a non-reentrant mutex for perfomance reasons.
Public Instance Methods
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 11 def [](key) @backend[key] end
Also aliased as: _get
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 15 def []=(key, value) @backend[key] = value end
Also aliased as: _set
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 88 def clear @backend.clear self end
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 49 def compute(key) store_computed_value(key, yield(@backend[key])) end
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 19 def compute_if_absent(key) if NULL != (stored_value = @backend.fetch(key, NULL)) stored_value else @backend[key] = yield end end
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 43 def compute_if_present(key) if NULL != (stored_value = @backend.fetch(key, NULL)) store_computed_value(key, yield(stored_value)) end end
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 75 def delete(key) @backend.delete(key) end
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 79 def delete_pair(key, value) if pair?(key, value) @backend.delete(key) true else false end end
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 93 def each_pair dupped_backend.each_pair do |k, v| yield k, v end self end
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 61 def get_and_set(key, value) stored_value = @backend[key] @backend[key] = value stored_value end
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 104 def get_or_default(key, default_value) @backend.fetch(key, default_value) end
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 67 def key?(key) @backend.key?(key) end
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 53 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
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 36 def replace_if_exists(key, new_value) if NULL != (stored_value = @backend.fetch(key, NULL)) @backend[key] = new_value stored_value end end
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 27 def replace_pair(key, old_value, new_value) if pair?(key, old_value) @backend[key] = new_value true else false end end
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 100 def size @backend.size end
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 71 def value?(value) @backend.value?(value) end
Private Instance Methods
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 118 def dupped_backend @backend.dup end
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 112 def initialize_copy(other) super @backend = {} self end
Calls superclass method
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 122 def pair?(key, expected_value) NULL != (stored_value = @backend.fetch(key, NULL)) && expected_value.equal?(stored_value) end
Source
# File lib/thread_safe/non_concurrent_cache_backend.rb, line 126 def store_computed_value(key, new_value) if new_value.nil? @backend.delete(key) nil else @backend[key] = new_value end end