| 1 |
#!/usr/local/bin/perl -w |
| 2 |
# |
| 3 |
# This script is an example of a primary/backup architecture. It is meant to be ran with the example named "one.pl". |
| 4 |
# I like to run one.pl in one window and then two.pl in another and watch them battle it out. Normally one.pl, which |
| 5 |
# is the bully in this case because of the higher priority number, would always be elected and two.pl would never do |
| 6 |
# anything but send election requests and get denied. To make things a little more interesting I made one.pl take |
| 7 |
# a short vacation so that two.pl could get a chance to do something. Enjoy! |
| 8 |
# |
| 9 |
# $Id: two.pl,v 1.0 2002-06-03 15:37:19+02 amo Exp amo $ |
| 10 |
# |
| 11 |
|
| 12 |
|
| 13 |
use strict; |
| 14 |
|
| 15 |
|
| 16 |
use POE::Component::Election::Bully; |
| 17 |
use POE; |
| 18 |
|
| 19 |
# these are the nodes participating in the election process |
| 20 |
my $node2 = new POE::Component::Election::Bully::Node(['127.0.0.1', 5121, 2]); |
| 21 |
|
| 22 |
|
| 23 |
POE::Session->create |
| 24 |
( inline_states => |
| 25 |
{ |
| 26 |
_start => \&start_session, |
| 27 |
_stop => sub { print "Session finished\n" }, |
| 28 |
elected2 => \&election_results2, |
| 29 |
coup2 => sub { |
| 30 |
print "Session 2 has been overthrown!\n"; |
| 31 |
$_[KERNEL]->delay('do_work2'); |
| 32 |
}, |
| 33 |
do_work2 => \&do_work2, |
| 34 |
vacation => sub { |
| 35 |
print "It's time for a vacation!\n"; |
| 36 |
$_[KERNEL]->delay('do_work2'); |
| 37 |
$_[KERNEL]->post('component2', 'stop_election'); |
| 38 |
$_[KERNEL]->delay_add('start_work', $_[ARG0]); |
| 39 |
}, |
| 40 |
start_work => sub { |
| 41 |
$_[KERNEL]->post('component2', 'start_election', $node2); |
| 42 |
}, |
| 43 |
} |
| 44 |
); |
| 45 |
|
| 46 |
$poe_kernel->run(); |
| 47 |
|
| 48 |
exit; |
| 49 |
|
| 50 |
|
| 51 |
#--- States ---# |
| 52 |
|
| 53 |
sub start_session { |
| 54 |
print "election starting\n"; |
| 55 |
|
| 56 |
POE::Component::Election::Bully->new |
| 57 |
( Alias => 'component2', |
| 58 |
Port => 5122, |
| 59 |
Priority => 1, |
| 60 |
ElectionState => 'elected2', |
| 61 |
CoupState => 'coup2', |
| 62 |
RestartTimer => 3, |
| 63 |
NotifyTimer => 3, |
| 64 |
Debugging => 0, |
| 65 |
); |
| 66 |
|
| 67 |
$_[KERNEL]->post('component2', 'start_election', $node2); |
| 68 |
} |
| 69 |
|
| 70 |
sub election_results2 { |
| 71 |
print "Session 2 has been elected!\n"; |
| 72 |
$_[KERNEL]->delay_add('do_work2', 5); |
| 73 |
} |
| 74 |
|
| 75 |
sub do_work2 { |
| 76 |
print "Session 2 doing some work while elected\n"; |
| 77 |
$_[KERNEL]->delay_add('do_work2', 5); |
| 78 |
} |
| 79 |
|
| 80 |
|
| 81 |
__END__ |
| 82 |
|
Parent Directory
| 
Revision Log
