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
|
require 'active_support/callbacks'
require 'active_support/core_ext/module/attribute_accessors_per_thread'
require 'concurrent'
module ActionCable
module Server
# Worker used by Server.send_async to do connection work in threads.
class Worker # :nodoc:
include ActiveSupport::Callbacks
thread_mattr_accessor :connection
define_callbacks :work
include ActiveRecordConnectionManagement
def initialize(max_size: 5)
@pool = Concurrent::ThreadPoolExecutor.new(
min_threads: 1,
max_threads: max_size,
max_queue: 0,
)
end
# Stop processing work: any work that has not already started
# running will be discarded from the queue
def halt
@pool.kill
end
def stopping?
@pool.shuttingdown?
end
def work(connection)
self.connection = connection
run_callbacks :work do
yield
end
ensure
self.connection = nil
end
def async_invoke(receiver, method, *args)
@pool.post do
invoke(receiver, method, *args)
end
end
def invoke(receiver, method, *args)
work(receiver) do
begin
receiver.send method, *args
rescue Exception => e
logger.error "There was an exception - #{e.class}(#{e.message})"
logger.error e.backtrace.join("\n")
receiver.handle_exception if receiver.respond_to?(:handle_exception)
end
end
end
def async_run_periodic_timer(channel, callback)
@pool.post do
run_periodic_timer(channel, callback)
end
end
def run_periodic_timer(channel, callback)
work(channel.connection) do
callback.respond_to?(:call) ? channel.instance_exec(&callback) : channel.send(callback)
end
end
private
def logger
ActionCable.server.logger
end
end
end
end
|
