Class: Sinatra::TemplateCache

Inherits:

Object

• Object
• Sinatra::TemplateCache

Defined in:

lib/sinatra/base.rb

Overview

Extremely simple template cache implementation.

• Not thread-safe.
• Size is unbounded.
• Keys are not copied defensively, and should not be modified after being passed to #fetch. More specifically, the values returned by key#hash and key#eql? should not change.

Implementation copied from Tilt::Cache.

Instance Method Summary

• #clear ⇒ Object

  Clears the cache.

• #fetch(*key) ⇒ Object

  Caches a value for key, or returns the previously cached value.

• #initialize ⇒ TemplateCache constructor

  A new instance of TemplateCache.

Constructor Details

#initialize ⇒ TemplateCache

Returns a new instance of TemplateCache.

# File 'lib/sinatra/base.rb', line 952

def initialize
  @cache = {}
end

Instance Method Details

#clear ⇒ Object

Clears the cache.

# File 'lib/sinatra/base.rb', line 967

def clear
  @cache = {}
end

#fetch(*key) ⇒ Object

Caches a value for key, or returns the previously cached value. If a value has been previously cached for key then it is returned. Otherwise, block is yielded to and its return value which may be nil, is cached under key and returned.

# File 'lib/sinatra/base.rb', line 960

def fetch(*key)
  @cache.fetch(key) do
    @cache[key] = yield
  end
end