Class: Card::Cache::Persistent

Inherits:
Object
  • Object
show all
Defined in:
lib/card/cache/persistent.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(opts) ⇒ Persistent

Returns a new instance of Persistent.



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# File 'lib/card/cache/persistent.rb', line 6

def initialize opts
  @store = opts[:store]
  self.system_prefix =
    opts[:prefix] || Card::Cache.system_prefix(opts[:class])
end

Instance Attribute Details

#prefix ⇒ Object (readonly)

Returns the value of attribute prefix.



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# File 'lib/card/cache/persistent.rb', line 4

def prefix
  @prefix
end

Instance Method Details

#delete(key) ⇒ Object 



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# File 'lib/card/cache/persistent.rb', line 37

def delete key
  @store.delete full_key(key)
end

#exist?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/card/cache/persistent.rb', line 47

def exist? key
  @store.exist? full_key(key)
end

#fetch(key, &block) ⇒ Object 



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# File 'lib/card/cache/persistent.rb', line 33

def fetch key, &block
  @store.fetch full_key(key), &block
end

#full_key(key) ⇒ Object 



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# File 'lib/card/cache/persistent.rb', line 51

def full_key key
  @prefix + key
end

#read(key) ⇒ Object 



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# File 'lib/card/cache/persistent.rb', line 17

def read key
  @store.read(full_key(key))
end

#reset ⇒ Object 



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# File 'lib/card/cache/persistent.rb', line 41

def reset
  @store.clear
rescue => e
  Rails.logger.debug "Problem clearing cache: #{e.message}"
end

#system_prefix=(system_prefix) ⇒ Object 



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# File 'lib/card/cache/persistent.rb', line 12

def system_prefix= system_prefix
  @system_prefix = system_prefix
  @prefix = "#{system_prefix}/"
end

#write(key, value) ⇒ Object 



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# File 'lib/card/cache/persistent.rb', line 29

def write key, value
  @store.write(full_key(key), value)
end

#write_variable(key, variable, value) ⇒ Object 



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# File 'lib/card/cache/persistent.rb', line 21

def write_variable key, variable, value
  if @store && (object = @store.read key)
    object.instance_variable_set "@#{variable}", value
    @store.write key, object
  end
  value
end