Class: Rack::PerRequestCache

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/per_request_cache.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ PerRequestCache

Returns a new instance of PerRequestCache.



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# File 'lib/rack/per_request_cache.rb', line 4

def initialize(app)
  @app = app
end

Class Method Details

.cached(key, &block) ⇒ Object 



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# File 'lib/rack/per_request_cache.rb', line 25

def cached(key, &block)
  return yield if @cache.nil?
  return @cache[key] if @cache.has_key?(key)

  @cache[key] = yield
end

.clear_cache ⇒ Object 



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# File 'lib/rack/per_request_cache.rb', line 21

def clear_cache
  @cache = nil
end

.initialize_cache ⇒ Object 



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# File 'lib/rack/per_request_cache.rb', line 17

def initialize_cache
  @cache = {}
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rack/per_request_cache.rb', line 8

def call(env)
  self.class.initialize_cache
  @app.call env
ensure
  self.class.clear_cache
end