Namespaces

• ICanBoogie
  • Storage
    • Codec
    • Storage

Classes

• APCStorage
• CacheCollection
• FileStorage
• FileStorageIterator
• RedisStorage
• RunTimeStorage
• StorageCollection

Interfaces

• Cache
• Codec
• Storage

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<?php

/*
 * This file is part of the ICanBoogie package.
 *
 * (c) Olivier Laviale <olivier.laviale@gmail.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace ICanBoogie\Storage;

/**
 * A collection of {@link Storage} instances.
 *
 * @package ICanBoogie\Storage
 */
class StorageCollection extends CacheCollection implements Storage, \ArrayAccess, \IteratorAggregate
{
    use Storage\ArrayAccess;

    /**
     * @var Storage[]
     */
    protected $collection = [];

    public function __construct(array $collection)
    {
        $this->collection = $collection;
    }

    /**
     * @inheritdoc
     */
    public function retrieve($key)
    {
        /* @var $update Storage[] */

        $value = null;
        $update = [];

        foreach ($this->collection as $storage)
        {
            $value = $storage->retrieve($key);

            if ($value !== null)
            {
                break;
            }

            $update[] = $storage;
        }

        if ($value === null)
        {
            return null;
        }

        foreach ($update as $storage)
        {
            $storage->store($key, $value);
        }

        return $value;
    }

    /**
     * @inheritdoc
     */
    public function store($key, $value, $ttl = null)
    {
        $this->for_each(__FUNCTION__, func_get_args());
    }

    /**
     * @inheritdoc
     */
    public function eliminate($key)
    {
        $this->for_each(__FUNCTION__, func_get_args());
    }

    /**
     * @inheritdoc
     */
    public function clear()
    {
        $this->for_each(__FUNCTION__, func_get_args());
    }

    /**
     * @inheritdoc
     *
     * @return Storage|null
     */
    public function find_by_type($type)
    {
        return parent::find_by_type($type);
    }

    /**
     * Apply a same method to each storage instance in the collection.
     *
     * @param string $method
     * @param array $arguments
     */
    private function for_each($method, array $arguments)
    {
        foreach ($this->collection as $storage)
        {
            call_user_func_array([ $storage, $method ], $arguments);
        }
    }
}