Class: Merb::Cache::DummyStore

Inherits:
Object
  • Object
show all
Defined in:
lib/merb-cache/cache-store/dummy.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ DummyStore

Provides dummy cache store for merb-cache



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# File 'lib/merb-cache/cache-store/dummy.rb', line 4

def initialize
  @config = Merb::Controller._cache.config
  prepare
end

Instance Method Details

#cache(_controller, key, from_now = nil, &block) ⇒ Object

Capture or restore the data in cache. If the cache entry expired or does not exist, the data are taken from the execution of the block, marshalled and stored in cache. Otherwise, the data are loaded from the cache and returned unmarshalled

Parameters

_controller<Merb::Controller>

The instance of the current controller

key<String>

The key identifying the cache entry

from_now<~minutes>

The number of minutes (from now) the cache should persist

&block

The template to be used or not

Additional information

When fetching data (the cache entry exists and has not expired) The data are loaded from the cache and returned unmarshalled. Otherwise: The controller is used to capture the rendered template (from the block). It uses the capture_#engine and concat_#engine methods to do so. The captured data are then marshalled and stored.



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# File 'lib/merb-cache/cache-store/dummy.rb', line 45

def cache(_controller, key, from_now = nil, &block)
  _data = _controller.send(:capture, &block)
  _controller.send(:concat, _data, block.binding)
  true
end

#cache_get(key) ⇒ Object

Fetch data from memcache using the specified key The entry is deleted if it has expired

Parameter

key<Sting>

The key identifying the cache entry

Returns

data<String, NilClass>

nil is returned whether the entry expired or was not found



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# File 'lib/merb-cache/cache-store/dummy.rb', line 71

def cache_get(key)
  nil
end

#cache_set(key, data, from_now = nil) ⇒ Object

Store data to memcache using the specified key

Parameters

key<Sting>

The key identifying the cache entry

data<String>

The data to be put in cache

from_now<~minutes>

The number of minutes (from now) the cache should persist



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# File 'lib/merb-cache/cache-store/dummy.rb', line 58

def cache_set(key, data, from_now = nil)
  true
end

#cache_store_type ⇒ Object

Gives info on the current cache store

Returns

The type of the current cache store



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# File 'lib/merb-cache/cache-store/dummy.rb', line 103

def cache_store_type
  "dummy"
end

#cached?(key) ⇒ Boolean

Checks whether a cache entry exists

Parameter

key<String>

The key identifying the cache entry

Returns

true if the cache entry exists, false otherwise

Returns:

  • (Boolean) 


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# File 'lib/merb-cache/cache-store/dummy.rb', line 22

def cached?(key)
  false
end

#expire(key) ⇒ Object

Expire the cache entry identified by the given key

Parameter

key<Sting>

The key identifying the cache entry



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# File 'lib/merb-cache/cache-store/dummy.rb', line 79

def expire(key)
  true
end

#expire_all ⇒ Object

Expire all the cache entries



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# File 'lib/merb-cache/cache-store/dummy.rb', line 95

def expire_all
  true
end

#expire_match(key) ⇒ Object

Expire the cache entries matching the given key

Parameter

key<Sting>

The key matching the cache entries

Warning !

This does not work in memcache.



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# File 'lib/merb-cache/cache-store/dummy.rb', line 90

def expire_match(key)
  true
end

#prepare ⇒ Object

This method is there to ensure minimal requirements are met (directories are accessible, table exists, connected to server, …)



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# File 'lib/merb-cache/cache-store/dummy.rb', line 11

def prepare
  true
end