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#!/usr/bin/perl -w
#
# $Source$
# $Revision$
#
# $Author$
# $Date$
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU GPL General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA,
# or refer to http://www.gnu.org/copyleft/gpl.html
#
use strict;
use Ivy;
use Getopt::Long;
use Carp;
use Time::Gettimeofday; # this module is needed by Ivy!
#delay between every request asking if a distant appli is still living!
my $delay_between_living_request;
# a hash table containing connected applis
my %connected_applications;
# when false, no request are send any more
my $running = 1;
my $opt_name;
my $opt_delay;
my $bus;
&check_options;
$delay_between_living_request = (defined $opt_delay) ? $opt_delay : 3000;
my $appliname = (defined $opt_name) ? $opt_name : "IvyTestLoop";
Ivy->init (-ivyBus => (defined $bus) ? $bus : undef,
-appName => $appliname,
-loopMode => 'LOCAL',
-messWhenReady => "$appliname READY",
);
my $IvyObj = Ivy->new(-statusFunc => \&statusFunc,
);
$IvyObj->start;
$IvyObj->bindRegexp( "^$appliname are you here\?.*(\\d\\d\\.\\d+)", [ "unused", \&yes_I_am_here] );
$IvyObj->bindRegexp( "^pause", [ "unused", \&pause] );
$IvyObj->bindRegexp("^unpause", [ "unused", \&unpause] );
Ivy->mainLoop;
# this function has 3 additionnal parameters till Ivy Version 4.6
# and now getting the new/dying applications is straightforward.
# The first 3 parameters are kept only for upward compatibility!
sub statusFunc {
my ($ref_ready, $ref_nonReady, $ref_hashReady, $appname, $status, $host_or_regexp) = @_;
if ($status eq "new") {
print "$appname connected from $host_or_regexp\n";
$connected_applications{$appname}="";
$IvyObj->bindRegexp("^($appname) is here.*<sent: (.*)> <replied: (.*)>", [\&reply_received]);
&ask_periodic_status($appname);
}
elsif ($status eq "died") {
print "$appname disconnected from $host_or_regexp\n";
$IvyObj->bindRegexp("^($appname) is here.*<sent: (.*)> <replied: (.*)>"); #unbinding
if (defined $connected_applications{$appname}) {
$IvyObj->afterCancel($connected_applications{$appname});
undef $connected_applications{$appname};
}
}
elsif ($status eq 'subscribing') {
print "$appname subscribed to '$host_or_regexp'\n";
}
elsif ($status eq 'unsubscribing') {
print "$appname unsubscribed to '$host_or_regexp'\n";
}
else {
print "Bug: unkown status; $status in &statusFunc\n";
}
# %connected_applications = %$ref_hashReady;
}
sub pause {
$running = 0;
print "appliname is now pausing\n";
}
sub unpause {
$running = 1;
print "appliname is now running\n";
}
sub ask_periodic_status {
my ($distantAppli) = @_;
my $repeat_id = $IvyObj->repeat($delay_between_living_request,
[ sub {&ask_if_living ($distantAppli);} ,
]
);
$connected_applications{$distantAppli} = $repeat_id;
}
sub preciseTime {
my $preciseTime = timeofday ();
my ($fracSeconds) = $preciseTime =~ /(\.\d*)/ ;
my ($ss, $mm, $hh) = (localtime)[0..2];
return sprintf ( "%02d:%02d:%02d.%03d", $hh,$mm,$ss,$fracSeconds*1000 );
}
sub ask_if_living {
my ($distantAppli) = @_;
return if (!$running);
my $reply = "$distantAppli are you here? (at " . &preciseTime . ")";
$IvyObj->sendMsgs($reply);
}
sub yes_I_am_here {
my ($ivy, $appname, $seconds) = @_;
my $reply = "$appliname is here and living <sent: $seconds> <replied: " . &preciseTime . ">";
# print "$appname asked me at $seconds if I am here and I reply: '$reply'\n";
$IvyObj->sendMsgs($reply);
}
sub reply_received {
my ($ivy, $appli_replying, $request_time, $reply_time) = @_;
my ($ss) = (localtime)[0];
my $preciseTime = timeofday ();
my ($fracSeconds) = $preciseTime =~ /(\.\d*)/ ;
my $delta = $ss + $fracSeconds - $request_time;
printf ("$appli_replying is living and needs %4.3fms for reply\n", $delta);
}
sub check_options {
# on traite la ligne de commande
my ($opt_help, $opt_gf);
GetOptions("help" => \$opt_help,
"b:s" => \$bus,
"name:s" => \$opt_name,
"delay:i" => \$opt_delay,
);
&usage if ($opt_help && $opt_help);
}
sub usage {
print "ivymainloop.pl [-h] [-b <network>:<port>] [-name ivyname] [-delay n]\n";
print " ivymainloop.pl is a simple test application for the ivy-perl library\n";
print " It sends periodic request on the bus and replies on similar requests\n";
print " Both requests and replies are precisely dated to get a general idea\n";
print " of performances\n";
print " options are:\n";
print " -b <network>:<port> ivy bus port, defaulted to \$IVYBUS or 127:2010\n";
print " -name <agent_name> name of this agent, defaulted to 'IvyTestloop'\n";
print " -delay ms delay between two requests defaulted to 3000ms\n";
print " To use it as a demo : you should start at least two instances\n";
print " of this script as well as one instance of ivyprobe.pl\n";
print " in 3 xterms and have a look on messages exchanged with ivyprobe\n";
print "Example:\n";
print " > ivymainloop.pl -name foo\n";
print " > ivymainloop.pl -name bar\n";
print " > ivyprobe.pl # to observe all exchanged messages\n\n";
exit;
}
__END__
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