# Mojolicious
sub stratup {
    my $self = shift;
    $self->plugin('Process');
    ...;
}

# Mojolicious::Lite
plugin 'Process';

# in controller
get '/job' => sub {
    my $c      = shift;
    my $job_id = MyApp->create_id( $c->req->params->to_hash );
    $c->stash( id => $job_id );
    $c->render('accept');

    if ($job_id) {

        # async execution of time-consuming process
        $c->process(
            command => [ 'job-command', 'id', $job_id ],
            stdout  => {
                close => sub {
                    my ($stream) = @_;
                    app->log->info( sprintf( '[%s] end job', $stream->pid ) );
                },
            },
            stderr => {
                read => sub {
                    my ( $stream, $chunk ) = @_;
                    chomp $chunk;
                    app->log->err( sprintf( '[%d] %s', $stream->pid, $chunk ) );
                },
            },
            timeout => 0,
        );
    }
};

my ( $pid, $stdin ) = $self->process(
    command => [ 'job-command', 'id', $job_id ],
    stdout => {
        read => sub {
            my ( $stream, $chunk ) = @_;
            chomp $chunk;
            app->log->info( sprintf( '[%s] %s', $stream->pid, $chunk ) );
        },
        close => sub {
            my ($stream) = @_;
            app->log->info( sprintf( '[%s] end process', $stream->pid ) );
        },
    },
    timeout => 0,
);