Slide 37
Slide 37 text
$eventmachine_library = :pure_ruby # need to force pure ruby!
require 'eventmachine'!
gem_original_require 'serialport'!
require 'smsrelay/gsmpdu'!
!
module EventMachine!
class EvmaSerialPort < StreamObject!
def self.open(dev, baud, databits, stopbits, parity)!
io = SerialPort.new(dev, baud, databits, stopbits, parity)!
return(EvmaSerialPort.new(io))!
end!
!
def initialize(io)!
super!
end!
!
##!
# Monkeypatched version of EventMachine::StreamObject#eventable_read so!
# that EOFErrors from the SerialPort object (which the ruby-serialport!
# library uses to signal the fact that there is no more data available!
# for reading) do not cause the connection to unbind.!
def eventable_read!
@last_activity = Reactor.instance.current_loop_time!
begin!
if io.respond_to?(:read_nonblock)!
10.times {!
data = io.read_nonblock(4096)!
EventMachine::event_callback uuid, ConnectionData, data!
}!
else!
data = io.sysread(4096)!
EventMachine::event_callback uuid, ConnectionData, data!
end!
rescue Errno::EAGAIN, Errno::EWOULDBLOCK, EOFError!
# no-op!
rescue Errno::ECONNRESET, Errno::ECONNREFUSED!
@close_scheduled = true!
EventMachine::event_callback uuid, ConnectionUnbound, nil!
end!
end!
end!
!
class << self!
def connect_serial(dev, baud, databits, stopbits, parity)!
EvmaSerialPort.open(dev, baud, databits, stopbits, parity).uuid!
end!
end!
!
def EventMachine::open_serial(dev, baud, databits, stopbits, parity,!
handler=nil)!
klass = if (handler and handler.is_a?(Class))!
handler!
else!
Class.new( Connection ) {handler and include handler}!
end!
s = connect_serial(dev, baud, databits, stopbits, parity)!
c = klass.new s!
@conns[s] = c!
block_given? and yield c!
c!
end!
!
class Connection!
# This seems to be necessary with EventMachine 0.12.x!
def associate_callback_target(sig)!
return(nil)!
end!
end!
end!
https://github.com/eventmachine/eventmachine/wiki/Code-Snippets