1 # -*- encoding: binary -*-
4 Revactor::VERSION >= '0.1.5' or abort 'revactor 0.1.5 is required'
6 # Enables use of the Actor model through {Revactor}[http://revactor.org]
9 # \Revactor dormant upstream, so the use of this is NOT recommended for
12 # It spawns one long-lived Actor for every listen socket in the process
13 # and spawns a new Actor for every client connection accept()-ed.
14 # +worker_connections+ will limit the number of client Actors we have
15 # running at any one time.
17 # Applications using this model are required to be reentrant, but do
18 # not have to worry about race conditions unless they use threads
19 # internally. \Rainbows! does not spawn threads under this model.
20 # Multiple instances of the same app may run in the same address space
21 # sequentially (but at interleaved points). Any network dependencies
22 # in the application using this model should be implemented using the
23 # \Revactor library as well, to take advantage of the networking
24 # concurrency features this model provides.
26 # === RubyGem Requirements
27 # * revactor 0.1.5 or later
28 module Rainbows::Revactor
29 autoload :Client, 'rainbows/revactor/client'
30 autoload :Proxy, 'rainbows/revactor/proxy'
32 include Rainbows::Base
34 # runs inside each forked worker, this sits around and waits
35 # for connections and doesn't die until the parent dies (or is
36 # given a INT, QUIT, or TERM signal)
37 def worker_loop(worker) #:nodoc:
39 init_worker_process(worker)
41 limit = worker_connections
42 actor_exit = Case[:exit, Actor, Object]
44 revactorize_listeners.each do |l,close,accept|
46 Actor.current.trap_exit = true
47 l.controller = l.instance_variable_set(:@receiver, Actor.current)
50 l.disable if l.enabled?
51 logger.info "busy: clients=#{nr} >= limit=#{limit}"
54 f.when(actor_exit) { nr -= 1 }
55 f.after(0.01) {} # another listener could've gotten an exit
59 l.enable unless l.enabled?
62 f.when(actor_exit) { nr -= 1 }
63 f.when(accept) do |_, _, s|
65 Actor.spawn_link(s) { |c| Client.new(c).process_loop }
69 Rainbows::Error.listen_loop(e)
70 end while Rainbows.alive
73 f.when(actor_exit) { nr -= 1 }
78 Actor.sleep 1 while Rainbows.tick || nr > 0
80 # ignore, let another worker process take it
83 def revactorize_listeners #:nodoc:
87 l = Revactor::TCP.listen(s, nil)
88 [ l, T[:tcp_closed, Revactor::TCP::Socket],
89 T[:tcp_connection, l, Revactor::TCP::Socket] ]
91 l = Revactor::UNIX.listen(s)
92 [ l, T[:unix_closed, Revactor::UNIX::Socket ],
93 T[:unix_connection, l, Revactor::UNIX::Socket] ]