Class: Async::Bus::Protocol::Connection

Inherits:
Object
  • Object
show all
Defined in:
lib/async/bus/protocol/connection.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(peer, id) ⇒ Connection

Returns a new instance of Connection.



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# File 'lib/async/bus/protocol/connection.rb', line 46

def initialize(peer, id)
	@peer = peer
	
	@wrapper = Wrapper.new(self)
	@unpacker = @wrapper.unpacker(peer)
	@packer = @wrapper.packer(peer)
	
	@transactions = {}
	@id = id
	
	@objects = {}
	@proxies = ::ObjectSpace::WeakMap.new
	@finalized = Thread::Queue.new
end

Instance Attribute Details

#objects ⇒ Object (readonly)

Returns the value of attribute objects.



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# File 'lib/async/bus/protocol/connection.rb', line 61

def objects
  @objects
end

#packer ⇒ Object (readonly)

Returns the value of attribute packer.



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# File 'lib/async/bus/protocol/connection.rb', line 65

def packer
  @packer
end

#proxies ⇒ Object (readonly)

Returns the value of attribute proxies.



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# File 'lib/async/bus/protocol/connection.rb', line 62

def proxies
  @proxies
end

#transactions ⇒ Object (readonly)

Returns the value of attribute transactions.



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# File 'lib/async/bus/protocol/connection.rb', line 74

def transactions
  @transactions
end

#unpacker ⇒ Object (readonly)

Returns the value of attribute unpacker.



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# File 'lib/async/bus/protocol/connection.rb', line 64

def unpacker
  @unpacker
end

Class Method Details

.client(peer) ⇒ Object 



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# File 'lib/async/bus/protocol/connection.rb', line 38

def self.client(peer)
	self.new(peer, 1)
end

.server(peer) ⇒ Object 



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# File 'lib/async/bus/protocol/connection.rb', line 42

def self.server(peer)
	self.new(peer, 2)
end

Instance Method Details

#[](name) ⇒ Object 



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# File 'lib/async/bus/protocol/connection.rb', line 92

def [](name)
	unless proxy = @proxies[name]
		proxy = Proxy.new(self, name)
		@proxies[name] = proxy
		
		ObjectSpace.define_finalizer(proxy, finalize(name))
	end
	
	return proxy
end

#bind(name, object) ⇒ Object 



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# File 'lib/async/bus/protocol/connection.rb', line 84

def bind(name, object)
	@objects[name] = object
end

#close ⇒ Object 



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# File 'lib/async/bus/protocol/connection.rb', line 157

def close
	@transactions.each do |id, transaction|
		transaction.close
	end
	
	@peer.close
end

#invoke(name, arguments, options = {}, &block) ⇒ Object 



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# File 'lib/async/bus/protocol/connection.rb', line 103

def invoke(name, arguments, options = {}, &block)
	
	id = self.next_id
	
	transaction = Transaction.new(self, id)
	@transactions[id] = transaction
	
	transaction.invoke(name, arguments, options, &block)
end

#next_id ⇒ Object 



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# File 'lib/async/bus/protocol/connection.rb', line 67

def next_id
	id = @id
	@id += 2
	
	return id
end

#proxy(object) ⇒ Object 



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# File 'lib/async/bus/protocol/connection.rb', line 76

def proxy(object)
	name = next_id.to_s(16).freeze
	
	bind(name, object)
	
	return name
end

#run ⇒ Object 



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# File 'lib/async/bus/protocol/connection.rb', line 113

def run
	finalizer_task = Async do
		while name = @finalized.pop
			@packer.write([:release, name])
		end
	end
	
	@unpacker.each do |message|
		id = message.shift
		
		if id == :release
			name = message.shift
			@objects.delete(name) if name.is_a?(String)
		elsif transaction = @transactions[id]
			transaction.received.enqueue(message)
		elsif message.first == :invoke
			message.shift
			
			transaction = Transaction.new(self, id)
			@transactions[id] = transaction
			
			name = message.shift
			object = @objects[name]
			
			Async do
				transaction.accept(object, *message)
			ensure
				transaction.close
			end
		else
			raise "Out of order message: #{message}"
		end
	end
ensure
	finalizer_task.stop
	
	@transactions.each do |id, transaction|
		transaction.close
	end
	
	@transactions.clear
	@proxies = ::ObjectSpace::WeakMap.new
end