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:
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
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
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。
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。
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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