Class: Cache

Inherits:
Object show all
Defined in:
lib/handset_detection/cache.rb

Overview

Cache class for HandsetDetection

Notes :

    • Cache objects may be > 1Mb when serialized so ensure memcache or memcached can handle it.

Instance Method Summary collapse

Constructor Details

#initialize(config = {}) ⇒ Cache

Returns a new instance of Cache.



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# File 'lib/handset_detection/cache.rb', line 40

def initialize(config={})
  @prefix = nil
  @ttl = nil
  @cache = nil
  set_config config
end

Instance Method Details

#delete(key) ⇒ Object

Remove a cache key (and its data)

param string $key return true on success, false otherwise



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# File 'lib/handset_detection/cache.rb', line 96

def delete(key)
  @cache.del @prefix + key
end

#purge ⇒ Object

Flush the whole cache

param void return true on success, false otherwise



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# File 'lib/handset_detection/cache.rb', line 105

def purge
  @cache.flush
end

#read(key) ⇒ Object

Fetch a cache key

param string $key return value on success, null otherwise



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# File 'lib/handset_detection/cache.rb', line 77

def read(key)
  @cache.get @prefix + key
end

#set_config(config) ⇒ Object

Set config file

param array $config An assoc array of config data return true on success, false otherwise



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# File 'lib/handset_detection/cache.rb', line 52

def set_config(config)
  @config = config 
  @prefix = (config.include?('cache') and config['cache'].include?('prefix')) ? config['cache']['prefix'] : 'hd40'
  @duration = (config.include?('cache') and config['cache'].include?('ttl')) ? config['cache']['ttl'] : 7200
  if config.include?('cache') and config['cache'].include?('memcached')
    @cache = Memcached.new(@config)
  elsif config.include?('cache') and config['cache'].include?('rails')
    @cache = RailsCache.new(@config)
  elsif config.include?('cache') and config['cache'].include?('none')
    @cache = None.new(@config)
  elsif config.include?('cache') and config['cache'].include?('memory')
    @cache = Memory.new(@config)
  elsif defined? Rails
    @cache = RailsCache.new(@config)
  else
    @cache = FileSystem.new(@config)
  end
  true
end

#write(key, data) ⇒ Object

Store a data at $key

param string $key param mixed $data return true on success, false otherwise



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# File 'lib/handset_detection/cache.rb', line 87

def write(key, data)
  @cache.set @prefix + key, data, @duration
end