Customer ask me to write DBI script which will change server if current server did't response. I write this simple code:

my $timeout = 10; #10 seconds timeout
foreach my $source (@sources) {
my dbh = connect_to_db($source);
my sth = $dbh->prepare(YOU_QUERY_GOES_HERE);
eval {
    local $SIG{ALRM} = sub {die "alarmn";};
    alarm($timeout);
    $sth->execute(YOUR_PARAMS);
    alarm(0);
};
unless ($@) {
    last;
#ALL OK
} else {
#didnt
    print "Timeout happens!n";
}
}

[download]

But customer said that he already use $@ in your script (and he can use it only once) so i need to rewrite my sample without using $@. How i can do this? May be there is some way to declare local copy of $@ and after my block to restore original value?

In reply to $@ alternative by Gangabass

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