Swoole を使用して高性能分散データベース システムを実装する方法

$nodes = [
    ['host' => 'node1', 'port' => 9501],
    ['host' => 'node2', 'port' => 9502],
    ['host' => 'node3', 'port' => 9503],
];

foreach ($nodes as $node) {
    $server = new SwooleServer($node['host'], $node['port'], SWOOLE_PROCESS, SWOOLE_SOCK_TCP);
    $server->set([
        'worker_num' => 4,
        'dispatch_mode' => 2,
        'open_eof_check' => true,
        'package_eof' => "
",
    ]);
    // 注册事件回调函数
    $server->on('connect', function ($server, $fd) {
        echo "Client {$fd}: connected
";
    });
    $server->on('receive', function ($server, $fd, $from_id, $data) {
        // 处理客户端请求
        $response = handleRequest($data);
        // 返回响应给客户端
        $server->send($fd, $response);
    });
    $server->start();
}

$router = new ConsistentHashRouter($nodes);

function handleRequest($data)
{
    // 解析请求数据
    $request = parseRequest($data);
    // 根据请求的数据找到对应的节点
    $node = $router->route($request['key']);
    // 发送请求到对应的节点
    $response = sendRequest($node, $request);
    // 返回响应给客户端
    return $response;
}

$storage = new KVStorage();

function sendRequest($node, $request)
{
    // 连接节点
    $client = new SwooleClient(SWOOLE_TCP);
    $client->connect($node['host'], $node['port']);
    // 发送请求
    $client->send($request);
    // 接收响应
    $response = $client->recv();
    // 关闭连接
    $client->close();
    return $response;
}

function handleRequest($data)
{
    // 解析请求数据
    $request = parseRequest($data);
    // 根据请求类型执行相应的操作
    if ($request['type'] == 'get') {
        return $storage->get($request['key']);
    } elseif ($request['type'] == 'set') {
        $storage->set($request['key'], $request['value']);
        return 'OK';
    } else {
        return 'Unknown command';
    }
}

class KVStorage
{
    private $data = [];
    
    public function get($key)
    {
        if (isset($this->data[$key])) {
            return $this->data[$key];
        } else {
            return 'Not found';
        }
    }
    
    public function set($key, $value)
    {
        $this->data[$key] = $value;
    }
}