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
|
module MultiJson
module OptionsCache
extend self
def reset
@dump_cache = {}
@load_cache = {}
end
def fetch(type, key, &block)
cache = instance_variable_get("@#{type}_cache")
cache.key?(key) ? cache[key] : write(cache, key, &block)
end
private
# Normally MultiJson is used with a few option sets for both dump/load
# methods. When options are generated dynamically though, every call would
# cause a cache miss and the cache would grow indefinitely. To prevent
# this, we just reset the cache every time the number of keys outgrows
# 1000.
MAX_CACHE_SIZE = 1000
def write(cache, key)
cache.clear if cache.length >= MAX_CACHE_SIZE
cache[key] = yield
end
end
end
|
