Laravel框架中实现使用阿里云ACE缓存服务
这篇文章主要介绍了Laravel框架中实现使用阿里云ACE缓存服务,本文扩展了一个ACE缓存驱动,以便使用阿里云ACE缓存服务,需要的朋友可以参考下
之前我写了一篇在 Laravel 4 框架中使用阿里云 OCS 缓存的文章,介绍了如何通过扩展 Laravel 4 来支持需要 SASL 认证的阿里云 OCS 缓存服务。有网友问我,ACE 的缓存怎么在 Laravel 4 中使用。我本来觉得应该可以完全用相同的办法,后来自己尝试的时候才发现,ACE 的缓存差别非常大。所以再写一篇,介绍一下如何在 Laravel 框架中使用阿里云 ACE 的缓存服务。
如何扩展 Laravel 的缓存驱动
在 Laravel 4 中使用 Cache::get($key), Cache::put($key, $value, $minutes) 这样的代码时,实际上是访问 实例化的 Illuminate\Cache\Repository, 所以我们通过 Cache::extend 方法扩展自定义缓存驱动时,同样应该返回一个 Illuminate\Cache\Repository 对象。
Laravel 4 内置的 Memcached 缓存驱动,实现的流程是这样的:
1.创建一个标准 Memcached 类的新对象
2.用上一步创建的 Memcached 对象创建一个实现了 Illuminate\Cache\StoreInterface 接口的 Illuminate\Cache\MemecachedStore 对象。
3.用上一步创建的 MemcachedStore 对象创建一个 Illuminate\Cache\Repository 对象。
所以我们在扩展自定义的 Cache 驱动时,根据自己的情况,选择上面的某一个步骤自定义,最终还是要返回 Illuminate\Cache\Repository 对象。比如上一篇文章中,我就是在第一步,创建标准 Memcached 对象之后,通过 setSaslAuthData() 方法设定 OCS 需要的用户名密码。之后第2步、第3步并不需要自定义。
ACE 的缓存服务
阿里云 ACE 的缓存服务,跟默认的 OCS 有所不同:
1.通过 Alibaba::Cache() 方法获得 Cache 对象。
2.ACE 的 Cache 对象与标准 Memcached 对象不同,支持的方法有限。
所以,这次第一步得到的不是标准 Memcached 对象,因此就不能创建 Illuminate\Cache\MemcachedStore 对象。需要自己实现 Illuminate\Cache\StoreInterface 接口。
在控制台创建了缓存空间之后,会有唯一的“缓存空间名称”,然后通过 Alibaba::Cache('缓存空间名称') 来获得 Cache 对象。以下就是实现 ACE 缓存服务驱动的步骤:
1.为了方便修改,我在配置文件 app/config/cache.php 中增加一个名为 ace 的键,存储缓存空间名称。
2.然后创建一个 AceMemcachedStore 类,这个类实现 Illuminate\Cache\StoreInterface 接口。
3.最后,用 AceMemcachedStore 对象来创建 Illuminate\Cache\Repository 对象。
下面来看具体的代码实现:
编码实现自定义 ACE 缓存驱动:
第一步,修改配置文件。打开 app/config/cache.php,在最后增加一行:
复制代码 代码如下:
// 指定缓存空间名称
'ace' => 'lblog-cache',
第二步,为了方便,把自己的类文件放在 src/Ace 目录下,使用 Ace 作为命名空间。
1.在 app 的同级目录创建目录 src/Ace。
2.打开 composer.json 文件,修改 autoload 节,在 classmap 下面用 psr-0 或者 psr-4 来自动加载文件。
复制代码 代码如下:
"autoload": {
"classmap": [
// autoload class
],
"psr-4": {
"Ace\\": "src/Ace"
}
},
创建 src/Ace/AceMemcachedStore.php 文件,代码如下:
复制代码 代码如下:
namespace Ace;
use Illuminate\Cache\StoreInterface;
use Illuminate\Cache\TaggableStore;
class AceMemcachedStore extends TaggableStore implements StoreInterface {
protected $memcached;
protected $prefix;
public function __construct($space, $prefix = '') {
$this->memcached = \Alibaba::Cache($space);
$this->prefix = strlen($prefix) > 0 ? $prefix.':' : '';
}
/**
* Retrieve an item from the cache by key.
*
* @param string $key
* @return mixed
*/
public function get($key)
{
$value = $this->memcached->get($this->prefix.$key);
if(is_bool($value) && $value === false) {
return null;
}
return $value;
}
/**
* Store an item in the cache for a given number of minutes.
*
* @param string $key
* @param mixed $value
* @param int $minutes
* @return boolean
*/
public function put($key, $value, $minutes)
{
return $this->memcached->set($this->prefix.$key, $value, $minutes);
}
/**
* Increment the value of an item in the cache.
*
* @param string $key
* @param mixed $value
* @return boolean
*/
public function increment($key, $value = 1)
{
return $this->memcached->increment($this->prefix.$key, $value);
}
/**
* Decrement the value of an item in the cache.
*
* @param string $key
* @param mixed $value
* @return boolean
*/
public function decrement($key, $value = 1)
{
return $this->memcached->decrement($this->prefix.$key, $value);
}
/**
* Store an item in the cache indefinitely.
*
* @param string $key
* @param mixed $value
* @return boolean
*/
public function forever($key, $value)
{
return $this->memcached->set($key, $value, 0);
}
/**
* Remove an item from the cache.
*
* @param string $key
* @return boolean
*/
public function forget($key)
{
return $this->memcached->delete($this->prefix.$key);
}
/**
* Remove all items from the cache.
*
* @return void
*/
public function flush()
{
//$this->memcached->flush();
return false;
}
public function getMemcached()
{
return $this->memcached;
}
/**
* Get the cache key prefix.
*
* @return string
*/
public function getPrefix()
{
return $this->prefix;
}
}

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