my $ams_hosts = $request->get_config()->get_ams_hosts($domain);

##</code><code>##

print STDERR Dumper @{$ams_hosts};

##</code><code>##

$VAR1 = {
          'domainId' => '1',
          'deviceIp' => '172.16.133.56',
          'deviceType' => 3,
          'deviceName' => 'AMS'
        };
$VAR2 = {
          'domainId' => '1',
          'deviceIp' => '172.16.133.57',
          'deviceType' => 3,
          'deviceName' => 'ams_57'
        };

##</code><code>##

my %ams_ips_hash = map {$_->{'deviceIp'}++} @{$ams_hosts};
$ams_ip = "" if !exists $ams_ips_hash{ $ams_ip};