class CurrencyExchanger
Public Class Methods
new()
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# File lib/mrpin/core/currency_exchanger/currency_exchanger.rb, line 3 def initialize @exchangers = [] @exchanger_local = ExchangerLocal.new @exchangers << ExchangerYahoo0.new @exchangers << ExchangerYahoo1.new @exchangers << ExchangerFixer.new end
Public Instance Methods
get_rate(from_currency, to_currency)
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# File lib/mrpin/core/currency_exchanger/currency_exchanger.rb, line 15 def get_rate(from_currency, to_currency) from_currency = from_currency.upcase to_currency = to_currency.upcase result = nil if from_currency == to_currency result = 1.0 else result = @exchanger_local.get_rate(from_currency, to_currency) if result.nil? result = get_rate_and_cache(from_currency, to_currency) end end if result.nil? || result == 0 AppInfoBase.instance.on_server_error("can't fetch rate from servers. currency #{from_currency}_#{to_currency}") result = 0.0 end result end
Private Instance Methods
get_rate_and_cache(from_currency, to_currency)
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# File lib/mrpin/core/currency_exchanger/currency_exchanger.rb, line 41 def get_rate_and_cache(from_currency, to_currency) from_currency = from_currency.upcase to_currency = to_currency.upcase result = nil @exchangers.each do |exchanger| begin result = exchanger.get_rate(from_currency, to_currency) break if !result.nil? && result > 0 rescue Exception => e AppInfo.instance.on_server_error("Can't fetch currency rate form #{exchanger.class.name}. Error: #{e.message}") end end @exchanger_local.set_rate(from_currency, to_currency, result) result end