RabbitMQ入门（PHP语言描述）

一 "Hello World!"

 生产者：

 /*

 * php G:\wamp\www\mygedu\yii tools/send-mq msg

*/
public function actionSendMq($argv=''){
    $connection = new AMQPStreamConnection('localhost', 5672, 'guest', 'guest');
    $channel = $connection->channel();
    $channel->queue_declare('hello', false, false, false, false);
    $msg = new AMQPMessage($argv);
    $channel->basic_publish($msg, '', 'hello');
    echo " [x] Sent '$argv'".PHP_EOL;
    $channel->close();
    $connection->close();
}

消费者：
/*
* php G:\wamp\www\mygedu\yii tools/receive-mq
*/
public function actionReceiveMq(){
    $connection = new AMQPStreamConnection('localhost', 5672, 'guest', 'guest');
    $channel = $connection->channel();
    $channel->queue_declare('hello', false, false, false, false);
    echo ' [*] Waiting for messages. To exit press CTRL+C', "\n";
    $callback = function($msg) {
        echo " [x] Received ", $msg->body, "\n";
    };
    $channel->basic_consume('hello', '', false, true, false, false, $callback);
    while(count($channel->callbacks)) {
        $channel->wait();
    }
}


二 Work queues

生产者：
/*
* php G:\wamp\www\mygedu\yii tools/new-task msg
*/
public function actionNewTask($data='Hello World!'){
    $connection = new AMQPStreamConnection('localhost', 5672, 'guest', 'guest');
    $channel = $connection->channel();
    $channel->queue_declare('my_task_queue', false, true, false, false);
    $msg = new AMQPMessage($data,
        array('delivery_mode' => 2) # make message persistent
    );
    $channel->basic_publish($msg, '', 'my_task_queue');
    echo " [x] Sent ", $data, "\n";
    $channel->close();
    $connection->close();
}

消费者：
/*
* php G:\wamp\www\mygedu\yii tools/worker
*/
public function actionWorker(){
    $connection = new AMQPStreamConnection('localhost', 5672, 'guest', 'guest');
    $channel = $connection->channel();
    $channel->queue_declare('my_task_queue', false, true, false, false);
    echo ' [*] Waiting for messages. To exit press CTRL+C', "\n";
    $callback = function($msg){
        echo " [x] Received ", $msg->body, "\n";
        sleep(substr_count($msg->body, '.'));
        echo " [x] Done", "\n";
        $msg->delivery_info['channel']->basic_ack($msg->delivery_info['delivery_tag']);
    };
    $channel->basic_qos(null, 1, null);
    $channel->basic_consume('my_task_queue', '', false, false, false, false, $callback);
    while(count($channel->callbacks)) {
        $channel->wait();
    }
    $channel->close();
    $connection->close();
}


三 Publish/Subscribe

生产者：
/*
* php G:\wamp\www\mygedu\yii tools/emit-log msg
*/
public function actionEmitLog($data='Hello World!'){
    $connection = new AMQPStreamConnection('localhost', 5672, 'guest', 'guest');
    $channel = $connection->channel();
    $channel->exchange_declare('logs', 'fanout', false, false, false);
    if(empty($data)) $data = "info: Hello World!";
    $msg = new AMQPMessage($data);
    $channel->basic_publish($msg, 'logs');
    echo " [x] Sent ", $data, "\n";
    $channel->close();
    $connection->close();
}

消费者：
/*
* php G:\wamp\www\mygedu\yii tools/receive-logs
*/
public function actionReceiveLogs(){
    $connection = new AMQPStreamConnection('localhost', 5672, 'guest', 'guest');
    $channel = $connection->channel();
    $channel->exchange_declare('logs', 'fanout', false, false, false);
    list($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();
}


四 Routing

生产者：
/*
* php G:\wamp\www\mygedu\yii tools/emit-log-direct info msg
*/
public function actionEmitLogDirect($argv, $data='Hello World!'){
    $connection = new AMQPStreamConnection('localhost', 5672, 'guest', 'guest');
    $channel = $connection->channel();
    $channel->exchange_declare('direct_logs', 'direct', false, false, false);
    $severity = isset($argv) && !empty($argv) ? $argv : 'info';
    $msg = new AMQPMessage($data);
    $channel->basic_publish($msg, 'direct_logs', $severity);
    echo " [x] Sent ",$severity,':',$data," \n";
    $channel->close();
    $connection->close();
}

消费者：
/*
* php G:\wamp\www\mygedu\yii tools/receive-logs-direct info,warning,error
*/
public function actionReceiveLogsDirect($argv){
    $connection = new AMQPStreamConnection('localhost', 5672, 'guest', 'guest');
    $channel = $connection->channel();
    $channel->exchange_declare('direct_logs', 'direct', false, false, false);
    list($queue_name, ,) = $channel->queue_declare("", false, false, true, false);
    $severities = explode(',', $argv);
    if(empty($severities)) {
        file_put_contents('php://stderr', "Usage: $argv[0] [info] [warning] [error]\n");
        exit(1);
    }
    foreach($severities as $severity) {
        $channel->queue_bind($queue_name, 'direct_logs', $severity);
    }
    echo ' [*] Waiting for logs. To exit press CTRL+C', "\n";
    $callback = function($msg){
        echo ' [x] ',$msg->delivery_info['routing_key'], ':', $msg->body, "\n";
    };
    $channel->basic_consume($queue_name, '', false, true, false, false, $callback);
    while(count($channel->callbacks)) {
        $channel->wait();
    }
    $channel->close();
    $connection->close();
}


五 Topics

生产者：
/*
* php G:\wamp\www\mygedu\yii tools/topics-emit-log-direct info msg
*/
public function actionTopicsEmitLogDirect($routing_key='kern.critical', $data='Hello World!'){
    $connection = new AMQPStreamConnection('localhost', 5672, 'guest', 'guest');
    $channel = $connection->channel();
    $channel->exchange_declare('topic_logs', 'topic', false, false, false);
    $msg = new AMQPMessage($data);
    $channel->basic_publish($msg, 'topic_logs', $routing_key);
    echo " [x] Sent ",$routing_key,':',$data," \n";
    $channel->close();
    $connection->close();
}

消费者：
/*
* php G:\wamp\www\mygedu\yii tools/topics-receive-logs-direct info,warning,error
*/
public function actionTopicsReceiveLogsDirect($binding_keys=''){
    $connection = new AMQPStreamConnection('localhost', 5672, 'guest', 'guest');
    $channel = $connection->channel();
    $channel->exchange_declare('topic_logs', 'topic', false, false, false);
    list($queue_name, ,) = $channel->queue_declare("", false, false, true, false);
    $binding_keys = explode(',', $binding_keys);
    if( empty($binding_keys )) {
        file_put_contents('php://stderr', "Usage: $binding_keys\n");
        exit(1);
    }
    foreach($binding_keys as $binding_key) {
        $channel->queue_bind($queue_name, 'topic_logs', $binding_key);
    }
    echo ' [*] Waiting for logs. To exit press CTRL+C', "\n";
    $callback = function($msg){
        echo ' [x] ',$msg->delivery_info['routing_key'], ':', $msg->body, "\n";
    };
    $channel->basic_consume($queue_name, '', false, true, false, false, $callback);
    while(count($channel->callbacks)) {
        $channel->wait();
    }
    $channel->close();
    $connection->close();
}


六 RPC

生产者：
/*
* php G:\wamp\www\mygedu\yii tools/rpc-client 10
*/
public function actionRpcClient($fib=10){
    $fibonacci_rpc = new FibonacciRpcClient();
    $response = $fibonacci_rpc->call($fib);
    echo " [.] Got ", $response, "\n";
}

消费者：
/*
* php G:\wamp\www\mygedu\yii tools/rpc-server
*/
public function actionRpcServer($routing_key='kern.critical', $data='Hello World!'){
    $connection = new AMQPStreamConnection('localhost', 5672, 'guest', 'guest');
    $channel = $connection->channel();
    $channel->queue_declare('rpc_queue', false, false, false, false);
    function fib($n) {
        if ($n == 0)
            return 0;
        if ($n == 1)
            return 1;
        return fib($n-1) + fib($n-2);
    }
    echo " [x] Awaiting RPC requests\n";
    $callback = function($req) {
        $n = intval($req->body);
        echo " [.] fib(", $n, ")\n";
        $msg = new AMQPMessage(
            (string) fib($n),
            array('correlation_id' => $req->get('correlation_id'))
        );
        $req->delivery_info['channel']->basic_publish(
            $msg, '', $req->get('reply_to'));
        $req->delivery_info['channel']->basic_ack(
            $req->delivery_info['delivery_tag']);
    };
    $channel->basic_qos(null, 1, null);
    $channel->basic_consume('rpc_queue', '', false, false, false, false, $callback);
    while(count($channel->callbacks)) {
        $channel->wait();
    }
    $channel->close();
    $connection->close();
}

相关类：
class FibonacciRpcClient {
    private $connection;
    private $channel;
    private $callback_queue;
    private $response;
    private $corr_id;

    public function __construct() {
        $this->connection = new AMQPStreamConnection(
            'localhost', 5672, 'guest', 'guest');
        $this->channel = $this->connection->channel();
        list($this->callback_queue, ,) = $this->channel->queue_declare(
            "", false, false, true, false);
        $this->channel->basic_consume(
            $this->callback_queue, '', false, false, false, false,
            array($this, 'on_response'));
    }
    public function on_response($rep) {
        if($rep->get('correlation_id') == $this->corr_id) {
            $this->response = $rep->body;
        }
    }

    public function call($n) {
        $this->response = null;
        $this->corr_id = uniqid();

        $msg = new AMQPMessage(
            (string) $n,
            array('correlation_id' => $this->corr_id,
                'reply_to' => $this->callback_queue)
        );
        $this->channel->basic_publish($msg, '', 'rpc_queue');
        while(!$this->response) {
            $this->channel->wait();
        }
        return intval($this->response);
    }
}