README

Delayed Cache 是 Zend Cache 的包装器。有时你会有并行请求需要已经启动但仍在构建中的缓存结果。延迟缓存将等待它准备就绪，然后返回结果给你。

代码信息

包信息

安装

通过 Composer 安装

将库添加到你的 composer.json 中的 requirements 键。

{
    // composer.json
    // [..]
    require: {
        // append this line to your requirements
        "koine/delayed-cache": "dev-master"
    }
}

替代安装

• 学习 composer。你不应该寻找替代安装。这值得你的时间。相信我 ;-)
• 遵循 这些说明

用法

$zendCache = $cache  = \Zend\Cache\StorageFactory::adapterFactory(
    'apc',
    array('ttl' => 3600)
);

$delayedCache = new \Koine\DelayedCache\DelayedCache($zendCache);

// index.php, second 10:00:00 am

$cacheKey = 'veryExpansiveCalculation';

$veryExpansiveCalculation = function () {
    sleep(60);

    return '42';
};

// hasItem returns true in the false time
if (!$delayedCache->hasItem($cacheKey)) {
    $delayedCache->setItem($cacheKey, $veryExpansiveCalculation);
}

$answer = $delayedCache->getItem($cacheKey);
echo 'answer is: ' . $answer;

// index.php, 10:00:10 am

$cacheKey = 'veryExpansiveCalculation';

$veryExpansiveCalculation = function () {
    sleep(60);

    return '42';
};

// although the result is not ready yet, hasItem will return true
if (!$delayedCache->hasItem($cacheKey)) {
    $delayedCache->setItem($cacheKey, $veryExpansiveCalculation);
}

// Waits 50 seconds until the building of the cache is done and then returns
// The $veryExpansiveCalculation callback will not be executed twice, unless the
// cache is cleared
$answer = $delayedCache->getItem($cacheKey);
echo 'answer is: ' . $answer;

或者你可以使用简短的方法

$cacheKey = 'veryExpansiveCalculation';

$veryExpansiveCalculation = function () {
    sleep(60);

    return '42';
};

// if cache is not set, it will set and then return the cached value
$answer = $delayedCache->getCachedItem($cacheKey, $veryExpansiveCalculation);
echo 'answer is: ' . $answer;

问题/特性建议

问题跟踪器在这里 Here。

贡献

只有 TDD 代码将被接受。请遵循 PSR-2 代码标准。

1. 分支它
2. 创建你的功能分支 (git checkout -b my-new-feature)
3. 提交你的更改 (git commit -am 'Add some feature')
4. 推送到分支 (git push origin my-new-feature)
5. 创建新的 Pull Request

如何运行测试

phpunit

要检查代码标准，运行

# Fixes code
./bin/php-cs-fix.sh

# outputs error
./bin/php-cs-fix.sh src true
./bin/php-cs-fix.sh test true

许可证

MIT

作者

• Marcelo Jacobus