Class: CurrencyExchange::Transporters::ExchangeTransporter

Inherits:
Object
  • Object
show all
Defined in:
lib/currency_exchange/transporters/exchange_transporter.rb

Direct Known Subclasses

JsonTransporter

Constant Summary collapse

TRANSPORTER_STRATEGY = 
{ :json => CurrencyExchange::Transporters::JsonTransporter }

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ExchangeTransporter

Returns a new instance of ExchangeTransporter.



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# File 'lib/currency_exchange/transporters/exchange_transporter.rb', line 7

def initialize
  @storage = CurrencyExchange::Storage::Cache.instance
end

Class Method Details

.load_instance(transporter_strategy) ⇒ Object 



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# File 'lib/currency_exchange/transporters/exchange_transporter.rb', line 19

def self.load_instance(transporter_strategy)
  (TRANSPORTER_STRATEGY[transporter_strategy] || self).new
end

Instance Method Details

#fetch_data(url) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/currency_exchange/transporters/exchange_transporter.rb', line 15

def fetch_data(url)
  raise NotImplementedError.new("fetch_data")
end

#retrieve_rates(url) ⇒ Object 



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# File 'lib/currency_exchange/transporters/exchange_transporter.rb', line 11

def retrieve_rates(url)
  @storage.fetch(url) || @storage.store(url, fetch_data(url))
end