编辑
2023-03-20
技术
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请注意,本文编写于 488 天前,最后修改于 488 天前,其中某些信息可能已经过时。

提问

你是一个经验丰富的程序开发者,我需要你为我的问题提供解决思路和完整代码,我的问题是:如何给Laravel框架设计一套rpc调用

答: 为了在Laravel框架中实现RPC调用,可以按照以下流程进行操作:

  1. 安装依赖

在Laravel项目根目录下使用composer安装“php-amqplib/php-amqplib”依赖,用于建立与RabbitMQ的连接。

composer require php-amqplib/php-amqplib
  1. 创建RabbitMQ通道

在Laravel应用程序中创建一个RabbitMQ通道,该通道将用于请求和响应。可以使用以下代码创建通道:

php
<?php use PhpAmqpLib\Connection\AMQPStreamConnection; use PhpAmqpLib\Message\AMQPMessage; class RabbitMQChannel { protected $connection; protected $channel; protected $callbackQueue; protected $response; protected $corrId; public function __construct() { $this->connection = new AMQPStreamConnection( 'localhost', 5672, 'guest', 'guest' ); $this->channel = $this->connection->channel(); list($this->callbackQueue, ,) = $this->channel->queue_declare( '', false, false, true, false ); $this->channel->basic_consume( $this->callbackQueue, '', false, false, false, false, array($this, 'onResponse') ); } public function onResponse($msg) { if ($msg->get('correlation_id') == $this->corrId) { $this->response = $msg->body; } } public function sendRequest($request) { $this->response = null; $this->corrId = uniqid(); $msg = new AMQPMessage( $request, array( 'correlation_id' => $this->corrId, 'reply_to' => $this->callbackQueue ) ); $this->channel->basic_publish( $msg, '', 'rpc_queue' ); while (!$this->response) { $this->channel->wait(); } return $this->response; } public function __destruct() { $this->channel->close(); $this->connection->close(); } }

在该类中,我们建立了与RabbitMQ的连接,并创建了通道。我们还定义了响应队列

  1. 创建RPC服务

在Laravel应用程序中创建一个RPC服务,该服务将使用RabbitMQ通道向远程RPC服务器发送请求并接收响应。可以使用以下代码创建一个RPC服务:

php
<?php class RpcService { protected $rabbitMQChannel; public function __construct(RabbitMQChannel $rabbitMQChannel) { $this->rabbitMQChannel = $rabbitMQChannel; } public function call($methodName, $params) { $request = json_encode(array( 'method' => $methodName, 'params' => $params, )); $response = $this->rabbitMQChannel->sendRequest($request); return json_decode($response); } }

在该类中,我们使用RabbitMQ通道发送请求,并等待响应。我们还返回解码的响应。

  1. 创建RPC服务器

在Laravel应用程序中创建一个RPC服务器,该服务器将处理RPC请求并返回响应。可以使用以下代码创建一个RPC服务器:

php
<?php use PhpAmqpLib\Connection\AMQPStreamConnection; use PhpAmqpLib\Message\AMQPMessage; class RpcServer { protected $connection; protected $channel; protected $callbackQueue; public function __construct() { $this->connection = new AMQPStreamConnection( 'localhost', 5672, 'guest', 'guest' ); $this->channel = $this->connection->channel(); $this->channel->queue_declare( 'rpc_queue', false, false, false, false ); $this->channel->basic_qos(null, 1, null); $this->channel->basic_consume( 'rpc_queue', '', false, false, false, false, array($this, 'onRequest') ); } public function onRequest($request) { $request = json_decode($request->body); $methodName = $request->method; $params = $request->params; $result = call_user_func_array(array($this, $methodName), $params); $response = new AMQPMessage( json_encode($result), array( 'correlation_id' => $request->correlation_id ) ); $request->delivery_info['channel']->basic_publish( $response, '', $request->get('reply_to') ); $request->delivery_info['channel']->basic_ack( $request->delivery_info['delivery_tag'] ); } public function __destruct() { $this->channel->close(); $this->connection->close(); } public function sum($a, $b) { return $a + $b; } }

在该类中,我们处理收到的RPC请求,并将响应返回到客户端。

  1. 调用RPC服务

在应用程序中调用RPC服务,可以使用以下代码:

php
<?php $rabbitMQChannel = new RabbitMQChannel(); $rpcService = new RpcService($rabbitMQChannel); $result = $rpcService->call('sum', array(10, 20));

在该代码中,我们创建了RabbitMQ通道用于RPC服务器通信,并创建了RPC服务。然后,我们使用RPC服务调用sum方法,并传递10和20作为参数,并等待响应。

完整代码可见于下面的代码片段:

php
<?php use PhpAmqpLib\Connection\AMQPStreamConnection; use PhpAmqpLib\Message\AMQPMessage; class RabbitMQChannel { protected $connection; protected $channel; protected $callbackQueue; protected $response; protected $corrId; public function __construct() { $this->connection = new AMQPStreamConnection( 'localhost', 5672, 'guest', 'guest' ); $this->channel = $this->connection->channel(); list($this->callbackQueue, ,) = $this->channel->queue_declare( '', false, false, true, false ); $this->channel->basic_consume( $this->callbackQueue, '', false, false, false, false, array($this, 'onResponse') ); } public function onResponse($msg) { if ($msg->get('correlation_id') == $this->corrId) { $this->response = $msg->body; } } public function sendRequest($request) { $this->response = null; $this->corrId = uniqid(); $msg = new AMQPMessage( $request, array( 'correlation_id' => $this->corrId, 'reply_to' => $this->callbackQueue ) ); $this->channel->basic_publish( $msg, '', 'rpc_queue' ); while (!$this->response) { $this->channel->wait(); } return $this->response; } public function __destruct() { $this->channel->close(); $this->connection->close(); } } class RpcService { protected $rabbitMQChannel; public function __construct(RabbitMQChannel $rabbitMQChannel) { $this->rabbitMQChannel = $rabbitMQChannel; } public function call($methodName, $params) { $request = json_encode(array( 'method' => $methodName, 'params' => $params, )); $response = $this->rabbitMQChannel->sendRequest($request); return json_decode($response); } } class RpcServer { protected $connection; protected $channel; protected $callbackQueue; public function __construct() { $this->connection = new AMQPStreamConnection( 'localhost', 5672, 'guest', 'guest' ); $this->channel = $this->connection->channel(); $this->channel->queue_declare( 'rpc_queue', false, false, false, false ); $this->channel->basic_qos(null, 1, null); $this->channel->basic_consume( 'rpc_queue', '', false, false, false, false, array($this, 'onRequest') ); } public function onRequest($request) { $request = json_decode($request->body); $methodName = $request->method; $params = $request->params; $result = call_user_func_array(array($this, $methodName), $params); $response = new AMQPMessage( json_encode($result), array( 'correlation_id' => $request->correlation_id ) ); $request->delivery_info['channel']->basic_publish( $response, '', $request->get('reply_to') ); $request->delivery_info['channel']->basic_ack( $request->delivery_info['delivery_tag'] ); } public function __destruct() { $this->channel->close(); $this->connection->close(); } public function sum($a, $b) { return $a + $b; } } $rabbitMQChannel = new RabbitMQChannel(); $rpcService = new RpcService($rabbitMQChannel); $result = $rpcService->call('sum', array(10, 20)); var_dump($result);

这就是在Laravel框架中实现RPC调用的完整代码。

本文作者:TyrantGenesis

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