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.
25 module Rainbows::Revactor
26 autoload :Client, 'rainbows/revactor/client'
27 autoload :Proxy, 'rainbows/revactor/proxy'
29 include Rainbows::Base
31 # runs inside each forked worker, this sits around and waits
32 # for connections and doesn't die until the parent dies (or is
33 # given a INT, QUIT, or TERM signal)
34 def worker_loop(worker) #:nodoc:
36 init_worker_process(worker)
38 limit = worker_connections
39 actor_exit = Case[:exit, Actor, Object]
41 revactorize_listeners.each do |l,close,accept|
43 Actor.current.trap_exit = true
44 l.controller = l.instance_variable_set(:@receiver, Actor.current)
47 l.disable if l.enabled?
48 logger.info "busy: clients=#{nr} >= limit=#{limit}"
51 f.when(actor_exit) { nr -= 1 }
52 f.after(0.01) {} # another listener could've gotten an exit
56 l.enable unless l.enabled?
59 f.when(actor_exit) { nr -= 1 }
60 f.when(accept) do |_, _, s|
62 Actor.spawn_link(s) { |c| Client.new(c).process_loop }
66 Rainbows::Error.listen_loop(e)
67 end while Rainbows.alive
70 f.when(actor_exit) { nr -= 1 }
75 Actor.sleep 1 while Rainbows.tick || nr > 0
77 # ignore, let another worker process take it
80 def revactorize_listeners #:nodoc:
84 l = Revactor::TCP.listen(s, nil)
85 [ l, T[:tcp_closed, Revactor::TCP::Socket],
86 T[:tcp_connection, l, Revactor::TCP::Socket] ]
88 l = Revactor::UNIX.listen(s)
89 [ l, T[:unix_closed, Revactor::UNIX::Socket ],
90 T[:unix_connection, l, Revactor::UNIX::Socket] ]