Class: Myxi::Exchange

Inherits:
Object
  • Object
show all
Defined in:
lib/myxi/exchange.rb

Constant Summary collapse

EXCHANGES = 
{}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(exchange_name, model_name = nil, &block) ⇒ Exchange

Returns a new instance of Exchange.



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# File 'lib/myxi/exchange.rb', line 20

def initialize(exchange_name, model_name = nil, &block)
  @exchange_name = exchange_name.to_sym
  @model_name = model_name
  @permission_block = block
end

Instance Attribute Details

#exchange_name ⇒ Object

Returns the value of attribute exchange_name.



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# File 'lib/myxi/exchange.rb', line 6

def exchange_name
  @exchange_name
end

#key_type ⇒ Object

Returns the value of attribute key_type.



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# File 'lib/myxi/exchange.rb', line 8

def key_type
  @key_type
end

#model_name ⇒ Object

Returns the value of attribute model_name.



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# File 'lib/myxi/exchange.rb', line 7

def model_name
  @model_name
end

Class Method Details

.add(exchange_name, *args, &block) ⇒ Object 



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# File 'lib/myxi/exchange.rb', line 10

def self.add(exchange_name, *args, &block)
  EXCHANGES[exchange_name.to_sym] = self.new(exchange_name, *args, &block)
end

.declare_all ⇒ Object 



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# File 'lib/myxi/exchange.rb', line 14

def self.declare_all
  EXCHANGES.keys.each do |exch|
    Myxi.channel.direct(exch.to_s)
  end
end

Instance Method Details

#can_subscribe?(routing_key, user) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/myxi/exchange.rb', line 42

def can_subscribe?(routing_key, user)
  if has_model?
    @permission_block.call(model_instance(routing_key), user)
  else
    @permission_block.call(routing_key, user)
  end
end

#has_model? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/myxi/exchange.rb', line 26

def has_model?
  !!@model_name
end

#model ⇒ Object 



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# File 'lib/myxi/exchange.rb', line 30

def model
  has_model? && model_name.constantize
end

#model_instance(id) ⇒ Object 



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# File 'lib/myxi/exchange.rb', line 38

def model_instance(id)
  has_model? ? model.where(key_type.to_sym => id.to_i).first : nil
end