Class: Qpid::Proton::Handler::MessagingAdapter

Inherits:
Adapter
  • Object
show all
Defined in:
lib/handler/messaging_adapter.rb

Overview

Adapt raw proton events to MessagingHandler events.

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Adapter

adapt, adapter, #forward, #initialize, #proton_adapter_class

Constructor Details

This class inherits a constructor from Qpid::Proton::Handler::Adapter

Class Method Details

.open_close(endpoint)

Define repetative on_xxx_open/close methods for session and connection



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# File 'lib/handler/messaging_adapter.rb', line 42

def self.open_close(endpoint)
  Module.new do
    define_method(:"on_#{endpoint}_remote_open") do |event|
      begin
        delegate(:"on_#{endpoint}_open", event.context)
        event.context.open if event.context.local_uninit?
      rescue StopAutoResponse
      end
    end

    define_method(:"on_#{endpoint}_remote_close") do |event|
      delegate_error(:"on_#{endpoint}_error", event.context) if event.context.condition
      begin
        delegate(:"on_#{endpoint}_close", event.context)
        event.context.close if event.context.local_active?
      rescue StopAutoResponse
      end
    end
  end
end

Instance Method Details

#add_credit(event) 



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# File 'lib/handler/messaging_adapter.rb', line 140

def add_credit(event)
  return unless (r = event.receiver)
  if r.open? && (r.drained == 0) && r.credit_window && (r.credit_window > r.credit)
    r.flow(r.credit_window - r.credit)
  end
end

#delegate(method, *args) 



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# File 'lib/handler/messaging_adapter.rb', line 26

def delegate(method, *args)
  forward(method, *args) or forward(:on_unhandled, method, *args)
end

#delegate_error(method, context) 



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# File 'lib/handler/messaging_adapter.rb', line 30

def delegate_error(method, context)
  unless forward(method, context) || forward(:on_error, context.condition)
    forward(:on_unhandled, method, context)    # Close the whole connection on an un-handled error

    context.connection.close(context.condition)
  end
end

#on_container_start(container) 



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# File 'lib/handler/messaging_adapter.rb', line 38

def on_container_start(container) delegate(:on_container_start, container); end

#on_container_stop(container) 



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# File 'lib/handler/messaging_adapter.rb', line 39

def on_container_stop(container) delegate(:on_container_stop, container); end

#on_delivery(event) 



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# File 'lib/handler/messaging_adapter.rb', line 98

def on_delivery(event)
  if event.link.receiver?       # Incoming message
    d = event.delivery
    if d.aborted?
      delegate(:on_delivery_abort, d)
    elsif d.complete?
      if d.link.local_closed? && d.receiver.auto_accept
        d.release         # Auto release after close
      else
        begin
          delegate(:on_message, d, d.message)
          d.accept if d.receiver.auto_accept && d.local_state == 0
        rescue Reject
          d.reject
        rescue Release
          d.release
        end
      end
    end
    delegate(:on_delivery_settle, d) if d.settled?
    add_credit(event)
  else                      # Outgoing message
    t = event.tracker
    case t.state
    when Delivery::ACCEPTED then delegate(:on_tracker_accept, t)
    when Delivery::REJECTED then delegate(:on_tracker_reject, t)
    when Delivery::RELEASED then delegate(:on_tracker_release, t)
    when Delivery::MODIFIED then delegate(:on_tracker_modify, t)
    end
    if t.settled?
      delegate(:on_tracker_settle, t)
      t.settle if t.sender.auto_settle
    end
  end
end

#on_link_flow(event) 



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# File 'lib/handler/messaging_adapter.rb', line 134

def on_link_flow(event)
  add_credit(event)
  sender = event.sender
  delegate(:on_sendable, sender) if sender && sender.open? && sender.credit > 0
end

#on_link_local_open(event)

Add flow control for local link open



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# File 'lib/handler/messaging_adapter.rb', line 96

def on_link_local_open(event) add_credit(event); end

#on_link_remote_close(event) 



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# File 'lib/handler/messaging_adapter.rb', line 79

def on_link_remote_close(event)
  s = event.link.sender?
  delegate_error(s ? :on_sender_error : :on_receiver_error, event.link) if event.link.condition
  delegate(s ? :on_sender_close : :on_receiver_close, event.link)
  event.link.close if event.link.local_active?
rescue StopAutoResponse
end

#on_link_remote_open(event)

Link open/close is handled separately because links are split into sender and receiver on the messaging API



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# File 'lib/handler/messaging_adapter.rb', line 68

def on_link_remote_open(event)
  if !event.link.local_active? # Copy remote terminus data to local
    event.link.source.replace(event.link.remote_source);
    event.link.target.replace(event.link.remote_target);
  end
  delegate(event.link.sender? ? :on_sender_open : :on_receiver_open, event.link)
  event.link.open if event.link.local_uninit?
  add_credit(event)
rescue StopAutoResponse
end

#on_transport_closed(event) 



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# File 'lib/handler/messaging_adapter.rb', line 91

def on_transport_closed(event)
  delegate(:on_transport_close, event.context) rescue StopAutoResponse
end

#on_transport_error(event) 



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# File 'lib/handler/messaging_adapter.rb', line 87

def on_transport_error(event)
  delegate_error(:on_transport_error, event.context)
end