Class: Lawnchair::StorageEngine::Composite

Inherits:
Object
  • Object
show all
Defined in:
lib/storage_engine/composite.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Composite

Returns a new instance of Composite.



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# File 'lib/storage_engine/composite.rb', line 6

def initialize(*args)
  @storage_engines = []
  args.each do |arg|
    register_storage_engine arg
  end
end

Instance Attribute Details

#storage_engines ⇒ Object (readonly)

Returns the value of attribute storage_engines.



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# File 'lib/storage_engine/composite.rb', line 4

def storage_engines
  @storage_engines
end

Instance Method Details

#fetch(key, options, &block) ⇒ Object 



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# File 'lib/storage_engine/composite.rb', line 18

def fetch(key, options, &block)
  raise "No Storage Engines Configured" if storage_engines.empty?
  value, index = find_in_storage(key, options)
  value ||= yield
  place_in_storage(key, value, options, index)
end

#register_storage_engine(storage_engine) ⇒ Object 



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# File 'lib/storage_engine/composite.rb', line 13

def register_storage_engine(storage_engine)
  klass = storage_engine == :redis ? "Redis" : "InProcess"
  storage_engines << Object.module_eval("Lawnchair::StorageEngine::#{klass}")
end