Class: HashBack::Backend

Inherits:

Object

• Object
• HashBack::Backend

Defined in:

lib/hashback/backend.rb

Overview

Proxy class over a key-value storage object which adds a namespace to keys. Useful if you have a number of different things that are saving to the same object space. Of course, then you may want to consider just opening up new key-value stores. This class may safely be ignored if not needed by your application.

Instance Method Summary

• #[](key) ⇒ Object
• #[]=(key, value) ⇒ Object
• #delete(key) ⇒ Object
• #initialize(namespace, backend) ⇒ Backend constructor

  Backend accepts a namespace which will be added to all keys on retrieval and setting, and a backend that responds to Hash-like methods.

Constructor Details

#initialize(namespace, backend) ⇒ Backend

Backend accepts a namespace which will be added to all keys on retrieval and setting, and a backend that responds to Hash-like methods. Moneta classes see the Moneta gem) work well as the backends to this class.

# File 'lib/hashback/backend.rb', line 12

def initialize(namespace, backend)
  @namespace = namespace
  @backend   = backend
end

Instance Method Details

#[](key) ⇒ Object

# File 'lib/hashback/backend.rb', line 17

def [](key)
  @backend[key_name_for(key)]
end

#[]=(key, value) ⇒ Object

# File 'lib/hashback/backend.rb', line 21

def []=(key, value)
  @backend[key_name_for(key)] = value
end

#delete(key) ⇒ Object

# File 'lib/hashback/backend.rb', line 25

def delete(key)
  @backend.delete(key_name_for(key))
end