Class: ActionCable::SubscriptionAdapter::Redis::Listener
Instance Method Summary
collapse
#add_subscriber, #broadcast, #remove_subscriber
Constructor Details
#initialize(adapter, event_loop) ⇒ Listener
Returns a new instance of Listener.
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# File 'lib/action_cable/subscription_adapter/redis.rb', line 55
def initialize(adapter, event_loop)
super()
@adapter = adapter
@event_loop = event_loop
@subscribe_callbacks = Hash.new { |h, k| h[k] = [] }
@subscription_lock = Mutex.new
@raw_client = nil
@when_connected = []
@thread = nil
end
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Instance Method Details
#add_channel(channel, on_success) ⇒ Object
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# File 'lib/action_cable/subscription_adapter/redis.rb', line 122
def add_channel(channel, on_success)
@subscription_lock.synchronize do
ensure_listener_running
@subscribe_callbacks[channel] << on_success
when_connected { send_command('subscribe', channel) }
end
end
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#invoke_callback ⇒ Object
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# File 'lib/action_cable/subscription_adapter/redis.rb', line 136
def invoke_callback(*)
@event_loop.post { super }
end
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#listen(conn) ⇒ Object
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# File 'lib/action_cable/subscription_adapter/redis.rb', line 71
def listen(conn)
conn.without_reconnect do
original_client = conn.client
conn.subscribe('_action_cable_internal') do |on|
on.subscribe do |chan, count|
@subscription_lock.synchronize do
if count == 1
@raw_client = original_client
until @when_connected.empty?
@when_connected.shift.call
end
end
if callbacks = @subscribe_callbacks[chan]
next_callback = callbacks.shift
@event_loop.post(&next_callback) if next_callback
@subscribe_callbacks.delete(chan) if callbacks.empty?
end
end
end
on.message do |chan, message|
broadcast(chan, message)
end
on.unsubscribe do |chan, count|
if count == 0
@subscription_lock.synchronize do
@raw_client = nil
end
end
end
end
end
end
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#remove_channel(channel) ⇒ Object
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# File 'lib/action_cable/subscription_adapter/redis.rb', line 130
def remove_channel(channel)
@subscription_lock.synchronize do
when_connected { send_command('unsubscribe', channel) }
end
end
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#shutdown ⇒ Object
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# File 'lib/action_cable/subscription_adapter/redis.rb', line 109
def shutdown
@subscription_lock.synchronize do
return if @thread.nil?
when_connected do
send_command('unsubscribe')
@raw_client = nil
end
end
Thread.pass while @thread.alive?
end
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