Class: RSMP::Queue

Inherits:
Object
  • Object
show all
Includes:
Receiver
Defined in:
lib/rsmp/collect/queue.rb

Overview

Receives items from a Distributor and keeps them in a queue. The client can wait for messages and will get them one by one.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Receiver

#accept_message?, #initialize_receiver, #inspect, #receive, #receive_event, #reject_message?, #start_receiving, #stop_receiving

Constructor Details

#initialize(distributor, filter: nil) ⇒ Queue 



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# File 'lib/rsmp/collect/queue.rb', line 10

def initialize(distributor, filter: nil)
  initialize_receiver distributor, filter: filter
  @condition = Async::Notification.new
  clear
end

Instance Attribute Details

#messages ⇒ Object (readonly)

Returns the value of attribute messages.



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# File 'lib/rsmp/collect/queue.rb', line 8

def messages
  @messages
end

Instance Method Details

#clear ⇒ Object 



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# File 'lib/rsmp/collect/queue.rb', line 16

def clear
  @messages = []
end

#handle_message(message) ⇒ Object 



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# File 'lib/rsmp/collect/queue.rb', line 42

def handle_message(message)
  @messages << message
  @condition.signal
end

#wait_for_message(timeout: nil) ⇒ Object 



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# File 'lib/rsmp/collect/queue.rb', line 20

def wait_for_message(timeout: nil)
  if @messages.empty?
    if timeout
      Async::Task.current.with_timeout(timeout) { @condition.wait }
    else
      @condition.wait
    end
  end
  Result.success(@messages.shift)
rescue Async::TimeoutError => e
  Result.failure(
    :timeout,
    message: "No message was received within #{timeout}s",
    source: :timeout,
    cause: e
  )
end

#wait_for_message! ⇒ Object 



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# File 'lib/rsmp/collect/queue.rb', line 38

def wait_for_message!(...)
  wait_for_message(...).value!
end