RabbitMQ - 如何发送扇区样式消息，该消息仅由一组消费者中的一个和该组外的所有消费者处理

Question

我是RabbitMQ的新手，并想知道如何设置系统以最好地满足我的需求。

假设我有5个消费者流程（C1-5），而C1-3只需要一个来消费该消息。 C4和C5 也需要接收消息。

如何配置rabbitMQ来实现这一目标？

我考虑过在C1-3前弹出另一个消费者来简单地推送到标准队列，而C1-3会消耗掉，但我想知道这是否是额外的工作而且RabbitMQ有更好的方法来解决这个问题？

非常感谢任何建议。

亲切的问候， FAB

Answer 1

这很容易做到，只需将C1-C3连接到同一队列即可。不需要额外的消费者/发布者路线。

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实施例

（使用PHP和videlalvaro/php-amqplib 。）

send.php

宣布粉丝交换＆＃34; events＆＃34; 并向其发布消息。

use PhpAmqpLib\Connection\AMQPConnection;
use PhpAmqpLib\Message\AMQPMessage;

$exchange = 'events';

$connection = new AMQPConnection('localhost', 5672, 'guest', 'guest');
$channel = $connection->channel();

$channel->exchange_declare($exchange, 'fanout', false, false, false);

$data = implode(' ', array_slice($argv, 1));
if(empty($data)) $data = "Something happened!";
$msg = new AMQPMessage($data);

$channel->basic_publish($msg, $exchange);

echo " [x] Sent ", $data, "\n";

$channel->close();
$connection->close();

---

pooledreceive.php （C1-C3）

附加到指定的＆＃34; pool＆＃34; 队列。消息将在接收者之间分发。

use PhpAmqpLib\Connection\AMQPConnection;

$exchange = 'events';
$queue = 'pool';

$connection = new AMQPConnection('localhost', 5672, 'guest', 'guest');
$channel = $connection->channel();

$channel->exchange_declare($exchange, 'fanout', false, false, false);
$channel->queue_declare($queue);
$channel->queue_bind($queue, $exchange);

echo ' [*] Waiting for events. To exit press CTRL+C', "\n";

$callback = function($msg) {
    echo ' [x] ', $msg->body, "\n";
};

$channel->basic_consume($queue, '', false, true, false, false, $callback);

while(count($channel->callbacks)) {
    $channel->wait();
}

$channel->close();
$connection->close();

---

receive.php （C4，C5）

这些接收器中的每一个都有自己的队列和自己的消息副本。

use PhpAmqpLib\Connection\AMQPConnection;

$exchange = 'events';

$connection = new AMQPConnection('localhost', 5672, 'guest', 'guest');
$channel = $connection->channel();

$channel->exchange_declare($exchange, 'fanout', false, false, false);

list($queue_name, ,) = $channel->queue_declare('');

$channel->queue_bind($queue_name, $exchange);

echo ' [*] Waiting for events. To exit press CTRL+C', "\n";

$callback = function($msg) {
    echo ' [x] ', $msg->body, "\n";
};

$channel->basic_consume($queue_name, '', false, true, false, false, $callback);

while(count($channel->callbacks)) {
    $channel->wait();
}

$channel->close();
$connection->close();