Class: Phlex::FIFOCacheStore

Inherits:
Object
  • Object
show all
Defined in:
lib/phlex/fifo_cache_store.rb

Overview

An extremely fast in-memory cache store that evicts keys on a first-in-first-out basis.

Instance Method Summary collapse

Constructor Details

#initialize(max_bytesize: 2 ** 20) ⇒ FIFOCacheStore

Returns a new instance of FIFOCacheStore.



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# File 'lib/phlex/fifo_cache_store.rb', line 5

def initialize(max_bytesize: 2 ** 20)
  @fifo = Phlex::FIFO.new(
    max_bytesize:,
    max_value_bytesize: max_bytesize
  )
end

Instance Method Details

#clear ⇒ Object 



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# File 'lib/phlex/fifo_cache_store.rb', line 27

def clear
  @fifo.clear
end

#fetch(key) ⇒ Object 



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# File 'lib/phlex/fifo_cache_store.rb', line 12

def fetch(key)
  fifo = @fifo
  key = map_key(key)

  if (result = fifo[key])
    JSON.parse(result)
  else
    result = yield

    fifo[key] = JSON.fast_generate(result)

    result
  end
end