Create a cache type

A cache type enables you to specify what is cached and enables merchants to clear that cache type using the Cache Management page in the Admin.

The tag scope provides a mechanism for a cache type.

Cache type configuration

Declare a new cache type in the <module_dir>/etc/cache.xml file with the following attributes:

Also, cache type configuration have the following required parameters:

For example:

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<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Cache/etc/cache.xsd">
    <type name="%cache_type_id%" translate="label,description" instance="VendorName\ModuleName\Model\Cache\Type\CacheType">
        <label>Cache Type Label</label>
        <description>Cache Type Description</description>
    </type>
</config>

You may declare multiple cache types.

Cache type model

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<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

namespace VendorName\ModuleName\Model\Cache\Type;

use Magento\Framework\App\Cache\Type\FrontendPool;
use Magento\Framework\Cache\Frontend\Decorator\TagScope;

/**
 * System / Cache Management / Cache type "Your Cache Type Label"
 */
class CacheType extends TagScope
{
    /**
     * Cache type code unique among all cache types
     */
    const TYPE_IDENTIFIER = '%cache_type_id%';

    /**
     * The tag name that limits the cache cleaning scope within a particular tag
     */
    const CACHE_TAG = '%CACHE_TYPE_TAG%';

    /**
     * @param FrontendPool $cacheFrontendPool
     */
    public function __construct(FrontendPool $cacheFrontendPool)
    {
        parent::__construct(
            $cacheFrontendPool->get(self::TYPE_IDENTIFIER),
            self::CACHE_TAG
        );
    }
}

You must specify the following parameters:

• VendorName\ModuleName defines the name of a module that uses a cache type. A module can use several cache types and a cache type can be used in several modules.
• %cache_type_id% defines the unique identifier of a cache type.
• %CACHE_TYPE_TAG% defines the unique tag to be used in the cache type scoping.

Store data in a custom cache type

To store serialized data in a custom cache, follow these steps:

1. Pass the argument to the constructor Magento\Framework\App\CacheInterface $cache of a required class (Repository, Model, Block, etc).

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    /**
     * @param CacheInterface $cache
     * @param SerializerInterface $serializer
     */
    public function __construct(CacheInterface $cache, SerializerInterface $serializer)
    {
        $this->cache = $cache;
        $this->serializer = $serializer;
    }
   

2. Store data in the cache.

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    $cacheKey  = \VendorName\ModuleName\Model\Cache\Type\CacheType::TYPE_IDENTIFIER;
    $cacheTag  = \VendorName\ModuleName\Model\Cache\Type\CacheType::CACHE_TAG;
   
    $storeData = $this->cache->save(
        $this->serializer->serialize($cacheData),
        $cacheKey,
        [$cacheTag],
        86400
    );
   

Retrieve data from custom cache type

Retrieve data from the cache with:

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$cacheKey  = \VendorName\ModuleName\Model\Cache\Type\CacheType::TYPE_IDENTIFIER;

$data = $this->serializer->unserialize($this->cache->load($cacheKey));

Invalidate custom cache type

To invalidate a custom cache type, follow these steps:

1. Pass the argument to the constructor Magento\Framework\App\Cache\TypeListInterface $typeList of a required class (Repository, Model, Block, etc).

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    /**
     * @param TypeListInterface $typeList
     */
    public function __construct(TypeListInterface $typeList)
    {
        $this->typeList = $typeList;
    }
   

2. Invalidate the cache.

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    $cacheKey  = \VendorName\ModuleName\Model\Cache\Type\CacheType::TYPE_IDENTIFIER;
   
    $this->typeList->invalidate($cacheKey);
   

Flush custom cache type

The custom cache type can be flushed in the following ways:

• Go to System -> Cache Management and flush the custom cache type
• Programmatically, using the TypeList.

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$cacheKey  = \VendorName\ModuleName\Model\Cache\Type\CacheType::TYPE_IDENTIFIER;

$this->typeList->cleanType($cacheKey);

Examples

A cache type translate is declared in the Magento_Translation module using the cache.xml configuration file.

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<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Cache/etc/cache.xsd">
    <type name="translate" translate="label,description" instance="Magento\Framework\App\Cache\Type\Translate">
        <label>Translations</label>
        <description>Translation files</description>
    </type>
</config>

Translate cache type model class is defined in Magento\Framework\App\Cache\Type\Translate.php class. It must extend the Magento\Framework\Cache\Frontend\Decorator\TagScope class.

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<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

namespace Magento\Framework\App\Cache\Type;

use Magento\Framework\Cache\Frontend\Decorator\TagScope;

/**
 * System / Cache Management / Cache type "Translations"
 */
class Translate extends TagScope
{
    /**
     * Cache type code unique among all cache types
     */
    const TYPE_IDENTIFIER = 'translate';

    /**
     * Cache tag used to distinguish the cache type from all other caches
     */
    const CACHE_TAG = 'TRANSLATE';

    /**
     * @param FrontendPool $cacheFrontendPool
     */
    public function __construct(FrontendPool $cacheFrontendPool)
    {
        parent::__construct($cacheFrontendPool->get(self::TYPE_IDENTIFIER), self::CACHE_TAG);
    }
}