Swoole 中使用 PDO 连接池、Redis 连接池、Mysqli 连接池

连接池使用说明

• 所有连接池的实现均基于 ConnectionPool 原始连接池；
• 连接池的底层原理是基于 Channel 的自动调度；
• 开发者需要自己保证归还的连接是可重用的；
• 若连接不可重用，需要调用 $pool->put(null); 归还一个空连接；
• 归还空连接后，原始连接池会重新创建连接以保证连接池的数量一致。

PDO 连接池

<?php
declare(strict_types=1);

use Swoole\Coroutine;
use Swoole\Database\PDOConfig;
use Swoole\Database\PDOPool;
use Swoole\Runtime;

Co::set(['hook_flags'=> SWOOLE_HOOK_ALL]);
$s = microtime(true);
const N = 1024;

Coroutine\run(function () {
    $config = (new PDOConfig)
        ->withHost('127.0.0.1')
        ->withPort(3306)
        // ->withUnixSocket('/tmp/mysql.sock')
        ->withDbName('test')
        ->withCharset('utf8mb4')
        ->withUsername('root')
        ->withPassword('root');
    // 创建连接池对象，默认创建64个连接
    $pool = new PDOPool($config);
    
    for ($n = N; $n--;) {
        Coroutine::create(function () use ($pool) {
            // 获取连接
            $pdo = $pool->get();
            $statement = $pdo->prepare('SELECT ? + ?');
            if (!$statement) {
                throw new RuntimeException('Prepare failed');
            }
            $a = mt_rand(1, 100);
            $b = mt_rand(1, 100);
            $result = $statement->execute([$a, $b]);
            if (!$result) {
                throw new RuntimeException('Execute failed');
            }
            $result = $statement->fetchAll();
            if ($a + $b !== (int)$result[0][0]) {
                throw new RuntimeException('Bad result');
            }
            // 回收连接
            $pool->put($pdo);
        });
    }
});

$s = microtime(true) - $s;
echo 'Use ' . $s . 's for ' . N . ' queries' . PHP_EOL;

Redis 连接池

<?php
declare(strict_types=1);

use Swoole\Coroutine;
use Swoole\Database\RedisConfig;
use Swoole\Database\RedisPool;
use Swoole\Runtime;

Co::set(['hook_flags'=> SWOOLE_HOOK_ALL]);
$s = microtime(true);
const N = 1024;

Coroutine\run(function () {
    $config = (new RedisConfig)
        ->withHost('127.0.0.1')
        ->withPort(6379)
        ->withAuth('')
        ->withDbIndex(0)
        ->withTimeout(1);
    // 创建连接池对象，默认创建64个连接
    $pool = new RedisPool($config);
    
    for ($n = N; $n--;) {
        Coroutine::create(function () use ($pool) {
            // 获取连接
            $redis = $pool->get();
            $result = $redis->set('foo', 'bar');
            if (!$result) {
                throw new RuntimeException('Set failed');
            }
            $result = $redis->get('foo');
            if ($result !== 'bar') {
                throw new RuntimeException('Get failed');
            }
            // 回收连接
            $pool->put($redis);
        });
    }
});

$s = microtime(true) - $s;
echo 'Use ' . $s . 's for ' . (N * 2) . ' queries' . PHP_EOL;

Mysqli 连接池

<?php
declare(strict_types=1);

use Swoole\Coroutine;
use Swoole\Database\MysqliConfig;
use Swoole\Database\MysqliPool;
use Swoole\Runtime;

Co::set(['hook_flags'=> SWOOLE_HOOK_ALL]);
$s = microtime(true);
const N = 1024;

Coroutine\run(function () {
    $config = (new MysqliConfig)
        ->withHost('127.0.0.1')
        ->withPort(3306)
        // ->withUnixSocket('/tmp/mysql.sock')
        ->withDbName('test')
        ->withCharset('utf8mb4')
        ->withUsername('root')
        ->withPassword('root');
    // 创建连接池对象，默认创建64个连接
    $pool = new MysqliPool($config);
    for ($n = N; $n--;) {
        Coroutine::create(function () use ($pool) {
            // 获取连接
            $mysqli = $pool->get();
            $statement = $mysqli->prepare('SELECT ? + ?');
            if (!$statement) {
                throw new RuntimeException('Prepare failed');
            }
            $a = mt_rand(1, 100);
            $b = mt_rand(1, 100);
            if (!$statement->bind_param('dd', $a, $b)) {
                throw new RuntimeException('Bind param failed');
            }
            if (!$statement->execute()) {
                throw new RuntimeException('Execute failed');
            }
            if (!$statement->bind_result($result)) {
                throw new RuntimeException('Bind result failed');
            }
            if (!$statement->fetch()) {
                throw new RuntimeException('Fetch failed');
            }
            if ($a + $b !== (int)$result) {
                throw new RuntimeException('Bad result');
            }
            while ($statement->fetch()) {
                continue;
            }
            // 回收连接
            $pool->put($mysqli);
        });
    }
});

$s = microtime(true) - $s;
echo 'Use ' . $s . 's for ' . N . ' queries' . PHP_EOL;