How swoole encapsulates the writing interface

Swoole is a high-performance network communication framework developed based on PHP. It can help us perform socket programming more quickly and efficiently, thereby realizing the needs of asynchronous, parallel, distributed and other application scenarios. The Swoole framework is increasingly used in various scenarios, especially in interface development.

This article will introduce how to use the Swoole framework to encapsulate interfaces to make the development and use of interfaces faster and more efficient.

1. Basic introduction to Swoole framework

Swoole is a framework for network communication based on PHP. It implements basic functions such as asynchronous I/O and parallel processing through C extension, and provides a A series of high-performance, flexible, and easy-to-use functions and classes that can quickly implement service-oriented network programming. The core functions of Swoole are as follows:

1. Asynchronous I/O: Supports event-driven asynchronous I/O operations and non-blocking IO operations, solving the problem of PHP's single thread being unable to handle a large number of concurrent requests.
2. Coroutine: It can realize the sequential execution of multiple processes in one thread, effectively improving the efficiency of program operation.
3. High performance: Swoole is written with C extension, and greatly improves operating efficiency by encapsulating and optimizing the bottom layer of PHP.
4. Distributed: Swoole can quickly build a distributed system and implement functions such as asynchronous task processing and message queues through coroutines and asynchronous I/O.

2. Swoole framework interface encapsulation example

Let’s use a simple example to introduce how to use the Swoole framework to encapsulate the interface:

1. Create an interface The service base class encapsulates basic service functions, such as returning data in JSON format, unified exception handling, interface retry, etc. The code is as follows:

<?php

use \Swoole\Coroutine\Http\Server as HttpServer;
use \Swoole\Http\Request;
use \Swoole\Http\Response;

class BaseApiServer
{
    protected $httpServer;

    public function __construct($host, $port)
    {
        $this->httpServer = new HttpServer($host, $port, false);
        $this->httpServer->set([
            'worker_num' => swoole_cpu_num(),
            'max_request' => 50000,
            'dispatch_mode' => 3,
            'open_http2_protocol' => true,
        ]);
    }

    public function start()
    {
        $this->httpServer->on('Request', [$this, 'onRequest']);
        $this->httpServer->start();
    }

    protected function jsonResponse(Response $response, $status = 200, $data = [], $msg = 'ok')
    {
        $result = [
            'code' => $status,
            'message' => $msg,
            'data' => $data
        ];
        $response->header('Content-Type', 'application/json;charset=utf-8');
        $response->end(json_encode($result, JSON_UNESCAPED_UNICODE));
    }

    protected function exceptionHandler(Response $response, $exception)
    {
        $this->jsonResponse($response, 500, [], $exception->getMessage());
    }

    protected function retry(\Closure $callback, $retryCount = 3, $interval = 300, $default = [])
    {
        $current = 0;
        while ($current < $retryCount) {
            try {
                $result = $callback();
                if ($result) {
                    return $result;
                }
            } catch (\Throwable $throwable) {
                //ignore
            }

            $current++;
            if ($current < $retryCount) {
                usleep($interval * 1000);
            }
        }

        return $default;
    }

    public function onRequest(Request $request, Response $response)
    {
        try {
            $this->handle($request, $response);
        } catch (\Throwable $throwable) {
            $this->exceptionHandler($response, $throwable);
        }
    }

    protected function onNotFound(Request $request, Response $response)
    {
        $this->jsonResponse($response, 404);
    }

    protected function handle(Request $request, Response $response)
    {
        $url = $request->server['request_uri'];
        $method = $request->server['request_method'];

        if (method_exists($this, $method . ucfirst($url))) {
            $this->{$method . ucfirst($url)}($request, $response);
        } else {
            $this->onNotFound($request, $response);
        }
    }
}

2. Create a user service Subclass, encapsulating the interface for obtaining user information:

<?php

use \Swoole\Http\Request;
use \Swoole\Http\Response;

class UserApiServer extends BaseApiServer
{
    public function getUser(Request $request, Response $response)
    {
        $userId = $request->get['userId'];
        $result = $this->retry(function () use ($userId) {
            // TODO: 从数据库或缓存中获取用户信息
            return [
                'id' => $userId,
                'name' => 'demo',
                // ...
            ];
        });
        $this->jsonResponse($response, 200, $result);
    }
}

3. Create a server instance and start the interface service through this instance:

<?php

require __DIR__ . &#39;/vendor/autoload.php&#39;;

$server = new UserApiServer(&#39;0.0.0.0&#39;, 9501);

$server->start();

So far, we have succeeded Encapsulates a basic user information interface service. The service can obtain the corresponding user information by accessing http://0.0.0.0:9501/getUser?userId=1.

3. Summary

The above is a basic example of using the Swoole framework to encapsulate the interface. To summarize:

1. In the base class of server request processing, we implement It provides common interface request and exception handling functions. By inheriting this base class, you can easily and quickly build interface services.
2. By encapsulating the retry method, we can avoid data acquisition failures caused by interface call failures or delays, enhancing the robustness and stability of the interface.
3. In actual applications, specific business logic can be implemented by overriding methods in the base class.

The coroutine, asynchronous I/O and other features of the Swoole framework make interface development more efficient, while also increasing the stability and reliability of interface services. In practical applications, developers can build more complete and efficient interface services by encapsulating functions such as the HTTP protocol according to their own needs.

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