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Highly available RPC service implemented by TP6 Think-Swoole

Oct 12, 2023 pm 02:48 PM
tp (thinkphp): a php frameworkthink-swoole: thinkphp framework plug-in based on swoole extension

TP6 Think-Swoole实现的高可用RPC服务

TP6 is a widely used PHP development framework, and Swoole is a high-performance PHP extension. By combining these two tools, we can implement a highly available RPC ( remote procedure call) service. This article will introduce how to use Think-Swoole to implement this function and provide specific code examples.

  1. Installation and Configuration

First, we need to install TP6 and Swoole. TP6 can be installed through the following command:

composer create-project topthink/think

Then, we need to install the Swoole extension. You can install it through the following command:

pecl install swoole

After the installation is complete, you need to add the following configuration to the php.ini file:

extension=swoole
  1. Create RPC service

Next, we need to create an RPC service to handle remote procedure calls. We can create a class called RpcService to handle RPC requests. In this class, we need to define some methods to handle specific RPC calls, and use the coroutine function provided by Swoole in the methods. The following is a sample code:

<php>

namespace apppc;

class RpcService
{
    public function getUsers($params)
    {
        // 查询数据库,返回用户列表
        $users = User::select();
        return $users;
    }
    
    public function addUser($params)
    {
        // 接收参数,将用户添加到数据库
        $user = new User();
        $user->name = $params['name'];
        $user->age = $params['age'];
        $user->save();
        
        return 'success';
    }
}
</php>
  1. Configuring RPC service

In the TP6 framework, we can set the relevant parameters of the RPC service through the configuration file. Open the config/rpc.php file and configure it according to the following example:

<php>
return [
    // 是否开启服务
    'enable' => true,

    // 服务监听的地址和端口
    'host' => '0.0.0.0',
    'port' => 8888,

    // RPC服务类的命名空间
    'service' => pppcRpcService::class,
];
</php>
  1. Start the RPC service

After completing the above configuration, we can use the following command to start RPC service:

php think swoole:rpc start

If everything is configured correctly, the service will be started on the specified address and port and listen for RPC calls from the client.

  1. Client call

Finally, we need to write a client to call the RPC service. We can use the following code to make the call:

<php>
$client = new SwooleCoroutineClient();
$client->connect('127.0.0.1', 8888);

$client->send('{"method": "getUsers", "params": []}');
$response = $client->recv();

echo $response;
</php>

In the above code, we first create a Swoole client that communicates with the RPC server. We then use the connect method to connect to the address and port of the RPC service. Next, we use the send method to send the request for the RPC call, with the request parameters passed in JSON format. Finally, we use the recv method to receive the response returned by the RPC service.

Through the above steps, we have successfully implemented a highly available RPC service based on TP6 and Swoole. We can extend the functionality of the service by modifying the methods in the RpcService class, such as adding more RPC calling methods. In the client, we can write corresponding code to call RPC services according to specific business needs.

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