Question

我想用React做经销商消息的异步路由器，但它不起作用。 http://zguide.zeromq.org/php:rtdealer中的代码正常运行，但我无法识别出我所做的不同。我使用的是libzmq 4.0.5

这是我的代码：

$context = new React\ZMQ\Context($loop);

$worker = $context->getSocket(\ZMQ::SOCKET_DEALER);
$worker->setSockOpt(\ZMQ::SOCKOPT_IDENTITY, 'A');
$worker->connect('tcp://127.0.0.1:5556');
$worker->send('END');

$worker->on('error', function ($e) {
    var_dump($e->getMessage());
});

$worker->on('messages', function($msg) use ($worker) {
    echo 'Dealer messages'. PHP_EOL;
    var_dump($msg);
});

$worker->on('message', function($msg) use ($worker) {
    echo 'Dealer message'. PHP_EOL;
    var_dump($msg);
});

$router = $context->getSocket(\ZMQ::SOCKET_ROUTER);
$router->bind('tcp://127.0.0.1:5556');

$i = 0;
$loop->addPeriodicTimer(1, function (React\EventLoop\Timer\Timer $timer) use (&$i, $router) {
    echo 'Time to send!'. PHP_EOL;
    $i++;
    $router->send('A', \ZMQ::MODE_SNDMORE);
    $router->send('END');
});

$router->on('messages', function($msg) use ($router) {
    echo 'Router messages'. PHP_EOL;
    var_dump($msg);
});

$router->on('message', function($msg) {
    echo 'Router message'. PHP_EOL;
    var_dump($msg);
});

$loop->run();

问题是只有经销商发送第一条消息＆＃34; END＆＃34;。之后，路由器尝试发送消息，但经销商没有收到消息。

此外，此功能似乎只调用一次：

// \React\ZMQ\SocketWrapper
public function handleReadEvent()
{
    $messages = $this->socket->recvmulti(ZMQ::MODE_NOBLOCK);
    echo 'Receiving...';    // Added
    var_dump($messages);    // Added

    if ($messages !== false) {
        if (count($messages) === 1) {
            $this->emit('message', array($messages[0]));
        }

        $this->emit('messages', array($messages));
    }
}

输出结果为：

Receiving...array(2) {
  [0]=>
  string(1) "A"
  [1]=>
  string(3) "END"
}
Router messages
array(2) {
  [0]=>
  string(1) "A"
  [1]=>
  string(3) "END"
}
Time to send!
Time to send!
Time to send!
Time to send!
Time to send!
...

修改

更改代码以在经销商连接之前绑定路由器，问题仍然存在：

$loop = React\EventLoop\Factory::create();

$context = new React\ZMQ\Context($loop);

$router = $context->getSocket(\ZMQ::SOCKET_ROUTER);
$router->bind('tcp://127.0.0.1:5556');

$loop->addPeriodicTimer(10, function (React\EventLoop\Timer\Timer $timer) use ($router) {
    echo 'Router sending messages with an interval of 10 seconds'. PHP_EOL;
    $router->send('A', \ZMQ::MODE_SNDMORE);
    $router->send('END');
});

$router->on('messages', function($msg) use ($router) {
    echo 'Router messages'. PHP_EOL;
    var_dump($msg);
});

$router->on('message', function($msg) {
    echo 'Router message'. PHP_EOL;
    var_dump($msg);
});

$worker = $context->getSocket(\ZMQ::SOCKET_DEALER);

$loop->addPeriodicTimer(5, function (React\EventLoop\Timer\Timer $timer) use ($worker) {
    echo 'After 5 seconds from router binding, connect the dealer and send something'. PHP_EOL;
    $worker->setSockOpt(\ZMQ::SOCKOPT_IDENTITY, 'A');
    $worker->connect('tcp://127.0.0.1:5556');
    $worker->send('END');
    $timer->getLoop()->cancelTimer($timer);     // Cancel the timer after connecting
});

$worker->on('error', function ($e) {
    var_dump($e->getMessage());
});

$worker->on('messages', function($msg) use ($worker) {
    echo 'Dealer messages'. PHP_EOL;
    var_dump($msg);
});

$worker->on('message', function($msg) use ($worker) {
    echo 'Dealer message'. PHP_EOL;
    var_dump($msg);
});

$loop->run();

这是终端输出：

After 5 seconds from router binding, connect the dealer and send something
Receiving...array(2) {
  [0]=>
  string(1) "A"
  [1]=>
  string(3) "END"
}
Router messages
array(2) {
  [0]=>
  string(1) "A"
  [1]=>
  string(3) "END"
}
Router sending messages with an interval of 10 seconds
Router sending messages with an interval of 10 seconds
Router sending messages with an interval of 10 seconds
Router sending messages with an interval of 10 seconds
Router sending messages with an interval of 10 seconds
Router sending messages with an interval of 10 seconds
Router sending messages with an interval of 10 seconds
Router sending messages with an interval of 10 seconds

Answer 1

我终于解决了这个问题。由@Jason的评论帮助没有使用PHP / React，你确定你的命名空间是正确的吗？，我查看了所谓的send方法。此方法如下所示：

// \React\ZMQ\SocketWrapper

public function send($message)
{
    echo 'Inside send, sending message'. PHP_EOL; //This line was added by myself
    $this->buffer->send($message);
}

然后，我想：如果我用这种方式调用这个方法：

$router->send('A', \ZMQ::MODE_SNDMORE);

第二个论点永远不会过去。

然后，我看到sendmulti中未实现SocketWrapper方法，并且__call类已在此SocketWrapper类中实现，直接调用此方法中实现的方法PHP的ZMQ api，所以我试着将sendmulti包装在一个数组中。它工作，所以我试图调用第一个send方法传递相同的数组，我不知道为什么，但它也有效，所以诀窍是调用：

$router->send(array('A', \ZMQ::MODE_SNDMORE));
$router->send(array('END'));

而不是：

$router->send('A', \ZMQ::MODE_SNDMORE);
$router->send('END');

另外，请注意位于GitHub存储库中的ZMQ PHP API，这是错误的。 PhpStorm以某种方式下载了另一个ZMQ PHP API，它位于某个似乎正确的地方，sendmulti方法原型在此API中如下所示：

public function sendmulti(array $message, $mode = 0)

令人惊讶的是，以下对此方法的调用似乎给出了相同的结果：

$router->send(array('A', \ZMQ::MODE_SNDMORE));
$router->send(array('A'), \ZMQ::MODE_SNDMORE);

反应ZMQ，路由器到经销商，不工作。 ZMQ 4.0.5

1 个答案: