Hprose\Service::setRequestTimer PHP Method

    function setRequestTimer($topic, $id, $request, $timeout)
    {
        if ($timeout > 0) {
            $self = $this;
            $topics = $this->getTopics($topic);
            $future = new Future();
            $timer = $this->timer->setTimeout(function () use($future) {
                $future->reject(new TimeoutException('timeout'));
            }, $timeout);
            $request->whenComplete(function () use($self, $timer) {
                $self->timer->clearTimeout($timer);
            })->fill($future);
            return $future->catchError(function ($e) use($self, $topics, $topic, $id) {
                if ($e instanceof TimeoutException) {
                    $checkoffline = function () use($self, &$checkoffline, $topics, $topic, $id) {
                        $t = $topics[$id];
                        $t->timer = $self->timer->setTimeout($checkoffline, $t->heartbeat);
                        if ($t->count < 0) {
                            $self->offline($topics, $topic, $id);
                        } else {
                            --$t->count;
                        }
                    };
                    $checkoffline();
                }
            });
        }
        return $request;
    }