Class: Trader::SyncConverter

Inherits:
FixedConverter show all
Defined in:
lib/trade-o-matic/converters/sync_converter.rb

Direct Known Subclasses

JsonApiConverter, WebConverter

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from FixedConverter

#apply, #current_rate

Methods inherited from Converter

#apply, #current_rate

Constructor Details

#initialize(_ttl, &_block) ⇒ SyncConverter

Returns a new instance of SyncConverter.



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# File 'lib/trade-o-matic/converters/sync_converter.rb', line 5

def initialize(_ttl, &_block)
  super nil
  @ttl = _ttl
  @block = _block
end

Instance Attribute Details

#ttl ⇒ Object (readonly)

Returns the value of attribute ttl.



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# File 'lib/trade-o-matic/converters/sync_converter.rb', line 3

def ttl
  @ttl
end

Instance Method Details

#expired? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/trade-o-matic/converters/sync_converter.rb', line 11

def expired?
  @rate.nil? || @last_sync < (Time.now - @ttl)
end

#rate ⇒ Object 



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# File 'lib/trade-o-matic/converters/sync_converter.rb', line 15

def rate
  if expired?
    @rate = @block.call
    @last_sync = Time.now
  end
  @rate
end