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module ActionCable
module Channel
module Redis
extend ActiveSupport::Concern
included do
on_unsubscribe :unsubscribe_from_all_channels
delegate :pubsub, to: :connection
end
def subscribe_to(redis_channel, callback = nil)
callback ||= default_subscription_callback(redis_channel)
@_redis_channels ||= []
@_redis_channels << [ redis_channel, callback ]
logger.info "Subscribing to the redis channel: #{redis_channel}"
pubsub.subscribe(redis_channel, &callback)
end
def unsubscribe_from_all_channels
if @_redis_channels
@_redis_channels.each do |channel, callback|
logger.info "Unsubscribing from the redis channel: #{channel}"
pubsub.unsubscribe_proc(channel, callback)
end
end
end
protected
def default_subscription_callback(channel)
-> (message) do
logger.info "Received a message over the redis channel: #{channel}"
broadcast ActiveSupport::JSON.decode(message)
end
end
end
end
end
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