Module: Tins::Deflect

Extended by:
ThreadLocal
Included in:
Object
Defined in:
lib/tins/dslkit.rb

Overview

See examples/recipe.rb and examples/recipe2.rb how this works at the moment.

Defined Under Namespace

Classes: DeflectError, Deflector, DeflectorCollection

Constant Summary collapse

@@sync = 
Sync.new

Class Method Summary collapse

Instance Method Summary collapse

Methods included from ThreadLocal

instance_thread_local, thread_local

Class Method Details

.deflect?(from, id) ⇒ Boolean

Return true if method id is deflected from class from, otherwise return false.

Returns:

  • (Boolean) 


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# File 'lib/tins/dslkit.rb', line 384

def self.deflect?(from, id)
  Deflect.deflecting && Deflect.deflecting.member?(from, id)
end

Instance Method Details

#deflect(from, id, deflector) ⇒ Object

Start deflecting method calls named id to the from class using the Deflector instance deflector. After that yield to the given block and stop deflecting again.



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# File 'lib/tins/dslkit.rb', line 397

def deflect(from, id, deflector)
  @@sync.synchronize do
    begin
      deflect_start(from, id, deflector)
      yield
    ensure
      deflect_stop(from, id)
    end
  end
end

#deflect?(from, id) ⇒ Boolean

Return true if method id is deflected from class from, otherwise return false.

Returns:

  • (Boolean) 


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# File 'lib/tins/dslkit.rb', line 390

def deflect?(from, id)
  Deflect.deflect?(from, id)
end

#deflect_start(from, id, deflector) ⇒ Object

Start deflecting method calls named id to the from class using the Deflector instance deflector.



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# File 'lib/tins/dslkit.rb', line 364

def deflect_start(from, id, deflector)
  @@sync.synchronize do
    Deflect.deflecting ||= DeflectorCollection.new
    Deflect.deflecting.member?(from, id) and
      raise DeflectError, "#{from}##{id} is already deflected"
    Deflect.deflecting.add(from, id, deflector)
    from.class_eval do
      define_method(id) do |*args|
        if Deflect.deflecting and d = Deflect.deflecting.find(self.class, id)
          d.call(self, id, *args)
        else
          super(*args)
        end
      end
    end
  end
end

#deflect_stop(from, id) ⇒ Object

Stop deflection method calls named id to class from.



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# File 'lib/tins/dslkit.rb', line 409

def deflect_stop(from, id)
  @@sync.synchronize do
    Deflect.deflecting.delete(from, id) or
      raise DeflectError, "#{from}##{id} is not deflected from"
    from.instance_eval { remove_method id }
  end
end