Module: Howitzer::Cache

Defined in:
lib/howitzer/cache.rb

Overview

Data can be stored in memory using this class

Constant Summary collapse

SPECIAL_NS_LIST =

:nodoc:

[:cloud].freeze

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.data ⇒ Object (readonly)

Returns the value of attribute data.



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# File 'lib/howitzer/cache.rb', line 11

def data
  @data
end

Class Method Details

.clear_all_ns(exception_list = SPECIAL_NS_LIST) ⇒ Object

Deletes all namespaces with data

Parameters:

  • exception_list (Array) (defaults to: SPECIAL_NS_LIST) —

    a namespace list for excluding



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# File 'lib/howitzer/cache.rb', line 50

def clear_all_ns(exception_list = SPECIAL_NS_LIST)
  (@data.keys - exception_list).each { |ns| clear_ns(ns) }
end

.clear_ns(ns) ⇒ Object

Deletes all data from a namespace

Parameters:

  • ns (String) —

    a namespace



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# File 'lib/howitzer/cache.rb', line 42

def clear_ns(ns)
  init_ns(ns)
end

.extract(ns, key = nil) ⇒ Object, Hash

Gets data from memory. Can get all namespace or single data value in namespace using key

Parameters:

  • ns (String) —

    a namespace

  • key (String) (defaults to: nil) —

    key that isn’t necessary required

Returns:

  • (Object, Hash) —

    all data from the namespace if the key is ommited, otherwise returs all data for the namespace

Raises:



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# File 'lib/howitzer/cache.rb', line 33

def extract(ns, key = nil)
  check_ns(ns)
  key ? @data[ns][key] : @data[ns]
end

.store(ns, key, value) ⇒ Object

Saves data into memory. Marking by a namespace and a key

Parameters:

  • ns (String) —

    a namespace

  • key (String) —

    a key that should be uniq within the namespace

  • value (Object) —

    everything you want to store in Memory

Raises:



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# File 'lib/howitzer/cache.rb', line 20

def store(ns, key, value)
  check_ns(ns)
  @data[ns][key] = value
end