Class: CacheLib::BasicCache

Inherits:
Object
  • Object
show all
Defined in:
lib/cache_lib/basic_cache.rb

Direct Known Subclasses

FifoCache, LirsCache, LruCache, SafeBasicCache, TtlCache

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ BasicCache

Returns a new instance of BasicCache.



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# File 'lib/cache_lib/basic_cache.rb', line 5

def initialize
  @limit = nil

  @cache = UtilHash.new
end

Instance Attribute Details

#limit ⇒ Object

Returns the value of attribute limit.



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# File 'lib/cache_lib/basic_cache.rb', line 3

def limit
  @limit
end

Instance Method Details

#clear ⇒ Object 



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# File 'lib/cache_lib/basic_cache.rb', line 57

def clear
  @cache.clear
  nil
end

#each ⇒ Object 



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# File 'lib/cache_lib/basic_cache.rb', line 66

def each
  @cache.each do |pair|
    yield pair
  end
end

#evict(key) ⇒ Object Also known as: delete 



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# File 'lib/cache_lib/basic_cache.rb', line 53

def evict(key)
  @cache.delete(key)
end

#expire ⇒ Object 



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# File 'lib/cache_lib/basic_cache.rb', line 62

def expire
  nil
end

#fetch(key) ⇒ Object 



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# File 'lib/cache_lib/basic_cache.rb', line 42

def fetch(key)
  has_key = true
  value = @cache.fetch(key) { has_key = false }

  if has_key
    value
  else
    yield if block_given?
  end
end

#get(key) ⇒ Object 



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# File 'lib/cache_lib/basic_cache.rb', line 23

def get(key)
  has_key = true
  value = @cache.fetch(key) { has_key = false }

  if has_key
    value
  else
    miss(key, yield)
  end
end

#initialize_copy(source) ⇒ Object 



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# File 'lib/cache_lib/basic_cache.rb', line 11

def initialize_copy(source)
  source_raw = source.raw

  @limit = source_raw[:limit]

  @cache = source_raw[:cache]
end

#inspect ⇒ Object 



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# File 'lib/cache_lib/basic_cache.rb', line 97

def inspect
  "#{self.class}, "\
  "Limit: #{@limit}, "\
  "Size: #{@cache.size}"
end

#key?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cache_lib/basic_cache.rb', line 72

def key?(key)
  @cache.key?(key)
end

#keys ⇒ Object 



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# File 'lib/cache_lib/basic_cache.rb', line 80

def keys
  @cache.keys.reverse!
end

#lookup(key) ⇒ Object Also known as: [] 



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# File 'lib/cache_lib/basic_cache.rb', line 38

def lookup(key)
  @cache[key]
end

#raw ⇒ Object 



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# File 'lib/cache_lib/basic_cache.rb', line 92

def raw
  { limit: @limit,
    cache: @cache.clone }
end

#size ⇒ Object 



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# File 'lib/cache_lib/basic_cache.rb', line 88

def size
  @cache.size
end

#store(key, value) ⇒ Object Also known as: []= 



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# File 'lib/cache_lib/basic_cache.rb', line 34

def store(key, value)
  miss(key, value)
end

#to_a ⇒ Object 



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# File 'lib/cache_lib/basic_cache.rb', line 76

def to_a
  @cache.to_a.reverse!
end

#values ⇒ Object 



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# File 'lib/cache_lib/basic_cache.rb', line 84

def values
  @cache.values.reverse!
end