生產者P將消費發送到X(Exchange交換機),隊列RQ6和As8綁定到交換機X。C1對應RQ6,C2對應As8.這樣,同一條消息,被C1和C2 同時消費。C1和C2各自擁有對消息全集的消費。比如C1寫數據庫,C2寫搜索引擎,二者寫入的數據都完全相同。
生產者(emit_log.php):
<?php
require_once __DIR__ . '/vendor/autoload.php';
use PhpAmqpLib\Connection\AMQPStreamConnection;
use PhpAmqpLib\Message\AMQPMessage;
$connection = new AMQPStreamConnection('localhost', 5672, 'guest', '123456');
$channel = $connection->channel();
$channel->exchange_declare('logs', 'fanout', false, false, false);
$data = "info: Hello World!";
$msg = new AMQPMessage($data);
$channel->basic_publish($msg, 'logs');
echo " [x] Sent ", $data, "\n";
$channel->close();
$connection->close();
消費者(receive_log.php):
<?php
require_once __DIR__ . '/vendor/autoload.php';
use PhpAmqpLib\Connection\AMQPStreamConnection;
$connection = new AMQPStreamConnection('localhost', 5672, 'guest', '123456');
$channel = $connection->channel();
// 聲明一個名稱叫做logs的扇形交換器
$channel->exchange_declare('logs', 'fanout', false, false, false);
// 提供隊列名稱爲空字符串時,我們創建了一個具有生成名稱的非持久隊列
// 方法返回時,$queue_name變量包含一個隨機生成的RabbitMQ隊列名稱
list($queue_name, ,) = $channel->queue_declare("", false, false, true, false);
$channel->queue_bind($queue_name, 'logs');
echo ' [*] Waiting for logs. 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();
注意:
1)這種模式,需要先運行消費者程序,生產者程序執行之後,發送消息。
2)各個消費者可以對消息全集消費,然後消費消息在不同的場景