Class: Money::RatesStore::StoreWithHistoricalDataSupport

Inherits:
Memory
  • Object
show all
Defined in:
lib/money/rates_store/store_with_historical_data_support.rb

Constant Summary collapse

INDEX_DATE_SEPARATOR = 
'_AT_'.freeze

Instance Method Summary collapse

Instance Method Details

#add_rate(currency_iso_from, currency_iso_to, rate, date = nil) ⇒ Object 



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# File 'lib/money/rates_store/store_with_historical_data_support.rb', line 5

def add_rate(currency_iso_from, currency_iso_to, rate, date = nil)
  transaction { rates[rate_key_for(currency_iso_from, currency_iso_to, date)] = rate }
end

#each_rate {|iso_from, iso_to, rate, date| ... } ⇒ Enumerator

Iterate over rate tuples (iso_from, iso_to, rate)

Examples:

store.each_rate do |iso_from, iso_to, rate, date|
  puts [iso_from, iso_to, rate, date].join
end

Yield Parameters:

  • iso_from (String) —

    Currency ISO string.

  • iso_to (String) —

    Currency ISO string.

  • rate (Numeric) —

    Exchange rate.

  • date (Date) —

    Historical date for the exchange rate. Nil if the rate is not historical rate.

Returns:

  • (Enumerator) 


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# File 'lib/money/rates_store/store_with_historical_data_support.rb', line 31

def each_rate(&block)
  enum = Enumerator.new do |yielder|
    rates.each do |key, rate|
      iso_from, iso_to = key.split(Memory::INDEX_KEY_SEPARATOR)
      iso_to, date = iso_to.split(INDEX_DATE_SEPARATOR)
      date = Date.parse(date) if date
      yielder.yield iso_from, iso_to, rate, date
    end
  end

  block_given? ? enum.each(&block) : enum
end

#get_rate(currency_iso_from, currency_iso_to, date = nil) ⇒ Object 



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# File 'lib/money/rates_store/store_with_historical_data_support.rb', line 9

def get_rate(currency_iso_from, currency_iso_to, date = nil)
  transaction { rates[rate_key_for(currency_iso_from, currency_iso_to, date)] }
end

#transaction(_force_sync = false, &block) ⇒ Object

Wraps block execution in a thread-safe transaction



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# File 'lib/money/rates_store/store_with_historical_data_support.rb', line 14

def transaction(_force_sync = false, &block)
  super(&block)
end