PSR6 rationality discussion

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Release: 2016-08-08 09:06:50
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I am now trying to write an implementation of PSR-6

When I was implementing the CacheItemPoolInterface interface, I was confused about the save method. The save method only received one parameter of type CacheItemInterface, but the CacheItemInterfaceinterface did not provide a method similar to getExpireTime. This As a result, CacheItemPoolInterface cannot obtain the expiration time of the cache item, and therefore cannot correctly write data to the cache storage.

I have seen several well-known PSR-6 implementations, such as symfony/cache php-cache/cache tedious/Stash. However, these implementation versions are not very elegant when implementing the save method.

For examplesymfony/cache

<code>public function save(CacheItemInterface $item)
{
    if (!$item instanceof CacheItem) {
        return false;
    }
    if ($this->deferred) {
        $this->commit();
    }
    $this->deferred[$item->getKey()] = $item;
    return $this->commit();
}</code>
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This save method can only pass in SymfonyComponentCacheCacheItem type parameters. Passing in other types will return false.

The current situation is that if you want to write a class library that uses caching, you must specify a specific PSR-6 implementation as a dependency, not just psr/cache. On the other hand, looking at the log interface PSR-3, if you want to write a class library that requires logging functionality, you only need to introduce psr/log, and no specific implementation is required.

In my opinion, PSR-6 does not need the CacheItemInterface interface. You only need to modify the save method to save($key, $value, $expire_at).

I searched for cache on packagist. Some other well-known cache libraries, such as doctrine/cache sonata-project/cache illuminate/cache, etc., have not chosen to follow PSR-6, which should be the same. Consider it

Reply content:

I am now trying to write an implementation of PSR-6

When I was implementing the CacheItemPoolInterface interface, I was confused about the save method. The save method only received a parameter of type CacheItemInterface, but the CacheItemInterfaceinterface did not provide a method similar to getExpireTime. This As a result, CacheItemPoolInterface cannot obtain the expiration time of the cache item, and therefore cannot correctly write data to the cache storage.

I have seen several well-known PSR-6 implementations, such as symfony/cache php-cache/cache tedious/Stash. However, these implementations are not very elegant when implementing the save method.

For examplesymfony/cache

<code>public function save(CacheItemInterface $item)
{
    if (!$item instanceof CacheItem) {
        return false;
    }
    if ($this->deferred) {
        $this->commit();
    }
    $this->deferred[$item->getKey()] = $item;
    return $this->commit();
}</code>
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Copy after login

This save method can only pass in SymfonyComponentCacheCacheItem type parameters. Passing in other types will return false.

The current situation is that if you want to write a class library that uses caching, you must specify a specific PSR-6 implementation as a dependency, not just psr/cache. On the other hand, looking at the log interface PSR-3, if you want to write a class library that requires logging functionality, you only need to introduce psr/log, and no specific implementation is required.

In my opinion, PSR-6 does not need the CacheItemInterface interface. You only need to modify the save method to save($key, $value, $expire_at).

I searched for cache on packagist, and some other well-known cache libraries, such as doctrine/cache sonata-project/cache illuminate/cache, etc., did not choose to follow PSR-6, which should be the same. Consider it

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