You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
97 lines
2.8 KiB
Lua
97 lines
2.8 KiB
Lua
-- Copyright (c) 2012 Robert G. Jakabosky <bobby@sharedrealm.com>
|
|
--
|
|
-- Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
-- of this software and associated documentation files (the "Software"), to deal
|
|
-- in the Software without restriction, including without limitation the rights
|
|
-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
-- copies of the Software, and to permit persons to whom the Software is
|
|
-- furnished to do so, subject to the following conditions:
|
|
--
|
|
-- The above copyright notice and this permission notice shall be included in
|
|
-- all copies or substantial portions of the Software.
|
|
--
|
|
-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
-- THE SOFTWARE.
|
|
|
|
local poller = require"examples.poller"
|
|
local poll = poller.new()
|
|
|
|
local zmq = require"zmq"
|
|
local z_NOBLOCK = zmq.NOBLOCK
|
|
local z_EVENTS = zmq.EVENTS
|
|
local z_POLLIN = zmq.POLLIN
|
|
local z_POLLOUT = zmq.POLLOUT
|
|
local z_POLLIN_OUT = z_POLLIN + z_POLLOUT
|
|
|
|
local N=tonumber(arg[1] or 100)
|
|
|
|
local ctx = zmq.init()
|
|
local s = ctx:socket(zmq.SUB)
|
|
local s_FD = s:getopt(zmq.FD)
|
|
|
|
s:setopt(zmq.SUBSCRIBE, "")
|
|
s:connect("tcp://localhost:5555")
|
|
|
|
-- current socket state
|
|
local blocked_state
|
|
local blocked_event
|
|
local on_sock_recv
|
|
local on_sock_send
|
|
|
|
-- IO event callback when socket was blocked
|
|
local function on_sock_io()
|
|
local events = s:getopt(z_EVENTS)
|
|
local unblocked = false
|
|
if events == blocked_event then
|
|
-- got the event the socket was blocked on.
|
|
unblocked = true
|
|
elseif events == z_POLLIN_OUT then
|
|
-- got both in & out events
|
|
unblocked = true
|
|
end
|
|
if unblocked then
|
|
-- got the event we are blocked on resume.
|
|
blocked_event = nil
|
|
blocked_state()
|
|
-- check if blocked event was processed.
|
|
if not blocked_event then
|
|
poll:remove_read(s_FD)
|
|
end
|
|
end
|
|
end
|
|
local function sock_blocked(state, event)
|
|
if not blocked_event then
|
|
-- need to register socket's fd with event loop
|
|
poll:add_read(s_FD, on_sock_io)
|
|
end
|
|
blocked_state = state
|
|
blocked_event = event
|
|
end
|
|
|
|
-- sock state functions
|
|
function on_sock_recv()
|
|
local data, err = s:recv(z_NOBLOCK)
|
|
if not data then
|
|
assert(err == 'timeout', "Bad error on zmq socket.")
|
|
return sock_blocked(on_sock_recv, z_POLLIN)
|
|
end
|
|
local msg_id = tonumber(data)
|
|
if (msg_id % 10000) == 0 then print(data) end
|
|
return on_sock_recv()
|
|
end
|
|
|
|
-- start processing of the socket.
|
|
poll:add_work(on_sock_recv)
|
|
|
|
-- start event loop
|
|
poll:start()
|
|
|
|
s:close()
|
|
ctx:term()
|
|
|