Class: Qless::Subscriber

Inherits:
Object
  • Object
show all
Defined in:
lib/qless/subscriber.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(client, channel, &message_received_callback) ⇒ Subscriber

Returns a new instance of Subscriber.



12
13
14
15
16
17
18
19
20
21
22
 
# File 'lib/qless/subscriber.rb', line 12

def initialize(client, channel, &message_received_callback)
  @client = client
  @channel = channel
  @message_received_callback = message_received_callback

  # pub/sub blocks the connection so we must use a different redis connection
  @client_redis = client.redis
  @listener_redis = client.new_redis_connection

  @my_channel = Qless.generate_jid
end

Instance Attribute Details

#channel ⇒ Object (readonly)

Returns the value of attribute channel.



10
11
12
 
# File 'lib/qless/subscriber.rb', line 10

def channel
  @channel
end

#client ⇒ Object (readonly)

Returns the value of attribute client.



10
11
12
 
# File 'lib/qless/subscriber.rb', line 10

def client
  @client
end

Class Method Details

.start(*args, &block) ⇒ Object 



6
7
8
 
# File 'lib/qless/subscriber.rb', line 6

def self.start(*args, &block)
  new(*args, &block).start_pub_sub_listener
end

Instance Method Details

#start_pub_sub_listener ⇒ Object 



24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
 
# File 'lib/qless/subscriber.rb', line 24

def start_pub_sub_listener
  @thread = ::Thread.start do
    @listener_redis.subscribe(channel, @my_channel) do |on|
      on.message do |_channel, message|
        if _channel == @my_channel
          @listener_redis.unsubscribe(@my_channel)
        else
          @message_received_callback.call(self, JSON.parse(message))
        end
      end
    end
  end

  wait_until_thread_listening
end

#wait_until_thread_listening ⇒ Object 



40
41
42
43
44
 
# File 'lib/qless/subscriber.rb', line 40

def wait_until_thread_listening
  Qless::WaitUntil.wait_until(10) do
    @client_redis.publish(@my_channel, 'disconnect') == 1
  end
end