AnyEvent->计时器不能与 AnyEvent::Handle 一起使用？

Question

我正在尝试在我的 Catalyst、AnyEvent、Websocket 应用程序中构建超时场景。 为此我正在使用

AnyEvent->timer

应该在几秒钟不活动后调用（没有更多的 WS 帧进入）。

问题是，我的计时器从未执行：

my $w = AnyEvent->timer (after => 3,
                         cb    => sub {
    warn "TIMEOUT!";
});

$self->{server} = Protocol::WebSocket::Handshake::Server->new_from_psgi(
                            $c->req->env) or die $c->log->fatal($!);

$self->{handle} = AnyEvent::Handle->new(
    fh => $c->req->io_fh,
    on_error => sub {
        my ($hd, $fatal, $msg) = @_;
        $clean_up->();
    }
);

die $c->log->fatal("WS Server error: '$_'")
        if $self->{server}->error;

$self->{server}->parse($self->{handle}->fh);
$self->{handle}->push_write($self->{server}->to_string);

$self->{handle}->on_read(sub {
    (my $frame = $self->{server}->build_frame)->append($_[0]->rbuf);

    while (my $frame_msg = $frame->next) {
        ...
    }

定时器回调永远不会被执行。 我的猜测是，计时器在另一个事件循环 (AnyEvent::Handle) 中不起作用？

Answer 1

您是否真的进入事件循环以处理要处理的计时器？您的代码 sn-p 没有表明这一点。

另外，AnyEvent::Handle 内置了不活动超时：

       timeout => $fractional_seconds
           If non-zero, then this enables an "inactivity" timeout: whenever
           this many seconds pass without a successful read or write on the
           underlying file handle, the "on_timeout" callback will be invoked
           (and if that one is missing, a non-fatal "ETIMEDOUT" error will
           be raised).

           Note that timeout processing is also active when you currently do
           not have any outstanding read or write requests: If you plan to
           keep the connection idle then you should disable the timout
           temporarily or ignore the timeout in the "on_timeout" callback,
           in which case AnyEvent::Handle will simply restart the timeout.

           Zero (the default) disables this timeout.

       on_timeout => $cb->($handle)
           Called whenever the inactivity timeout passes. If you return from
           this callback, then the timeout will be reset as if some activity
           had happened, so this condition is not fatal in any way.