#!/usr/bin/perl
use strict;
use warnings;
use Async::Event::Interval;
use Log::Log4perl qw(:easy);

Log::Log4perl->easy_init(
    { level   => $INFO,
      file    => 'test.log' } );

my $logger = Log::Log4perl->get_logger();

my $count = 1;

my $event
    = Async::Event::Interval->new(1.5, \&callback);

$event->start;

for (1..10){
    print "$_: in main loop\n";

    $event->stop if $_ == 3;
    $event->start if $_ == 7;

    if ($event->status){
        print "event is running\n";
	$logger->info('logging in main');
    }

    if ($event->status == -1){
        print "event has crashed... restarting it\n";
        $event->restart;
    }

    sleep 1;
}

sub callback {
    print "timed event callback\n";
    $logger->info("running poll $count") ;
    $count++;
}

__END__

$ perl test.pl
1: in main loop
event is running
timed event callback
timed event callback
2: in main loop
event is running
3: in main loop
timed event callback
4: in main loop
5: in main loop
6: in main loop
7: in main loop
event is running
timed event callback
8: in main loop
event is running
timed event callback
9: in main loop
timed event callback
event is running
10: in main loop
timed event callback
event is running
timed event callback

$ cat test.log
2018/01/23 17:34:15 logging in main
2018/01/23 17:34:15 running poll 1
2018/01/23 17:34:16 logging in main
2018/01/23 17:34:16 running poll 2
2018/01/23 17:34:22 logging in main
2018/01/23 17:34:22 running poll 1
2018/01/23 17:34:23 logging in main
2018/01/23 17:34:23 running poll 2
2018/01/23 17:34:24 running poll 3
2018/01/23 17:34:24 logging in main
2018/01/23 17:34:25 logging in main
2018/01/23 17:34:25 running poll 4