blob: bb8d64e27aa775be49913318df0217c4dcc05846 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
# frozen_string_literal: true
require "active_support/core_ext/hash/indifferent_access"
module ActionCable
module Connection
# Collection class for all the channel subscriptions established on a given connection. Responsible for routing incoming commands that arrive on
# the connection to the proper channel.
class Subscriptions # :nodoc:
def initialize(connection)
@connection = connection
@subscriptions = {}
end
def execute_command(data)
case data["command"]
when "subscribe" then add data
when "unsubscribe" then remove data
when "message" then perform_action data
else
logger.error "Received unrecognized command in #{data.inspect}"
end
rescue Exception => e
logger.error "Could not execute command from (#{data.inspect}) [#{e.class} - #{e.message}]: #{e.backtrace.first(5).join(" | ")}"
end
def add(data)
id_key = data["identifier"]
id_options = ActiveSupport::JSON.decode(id_key).with_indifferent_access
return if subscriptions.key?(id_key)
subscription_klass = id_options[:channel].safe_constantize
if subscription_klass && ActionCable::Channel::Base >= subscription_klass
subscription = subscription_klass.new(connection, id_key, id_options)
subscriptions[id_key] = subscription
subscription.subscribe_to_channel
else
logger.error "Subscription class not found: #{id_options[:channel].inspect}"
end
end
def remove(data)
logger.info "Unsubscribing from channel: #{data['identifier']}"
remove_subscription find(data)
end
def remove_subscription(subscription)
subscription.unsubscribe_from_channel
subscriptions.delete(subscription.identifier)
end
def perform_action(data)
find(data).perform_action ActiveSupport::JSON.decode(data["data"])
end
def identifiers
subscriptions.keys
end
def unsubscribe_from_all
subscriptions.each { |id, channel| remove_subscription(channel) }
end
# TODO Change this to private once we've dropped Ruby 2.2 support.
# Workaround for Ruby 2.2 "private attribute?" warning.
protected
attr_reader :connection, :subscriptions
private
delegate :logger, to: :connection
def find(data)
if subscription = subscriptions[data["identifier"]]
subscription
else
raise "Unable to find subscription with identifier: #{data['identifier']}"
end
end
end
end
end
|
