README

Yii1 Tag Aware Cache Extension

This extension provides tag aware cache for Yii1.

For license information check the LICENSE-file.

Installation

The preferred way to install this extension is through composer.

Either run

php composer.phar require --prefer-dist yii1tech/tagged-cache

or add

"yii1tech/tagged-cache": "*"

to the "require" section of your composer.json.

Usage

This extension provides tag aware cache for Yii1. Tags allow you to organize cache items into groups, each of which can be cleared separately. This extension introduces \yii1tech\cache\tagged\TagAwareCacheContract interface, which extends Yii standard \ICache, adding extra parameter for the tags specification on saving data to the cache.

Application configuration example:

<?php

return [
    'components' => [
        'cache' => [
            'class' => \yii1tech\cache\tagged\MemCache::class, // implements `\yii1tech\cache\tagged\TagAwareCacheContract`
            'servers' => [
                [
                    'host' => 'memcache.server',
                    'port' => 11211,
                    'weight' => 100,
                ],
            ],
        ],
        // ...
    ],
    // ...
];

You may pass list of cache item tags as an extra argument to methods get() and add(). For example:

<?php

$cacheKey = 'example-cache-key';
$value = Yii::app()->cache->get($cacheKey);
if ($value === false) {
    $value = Yii::app()->db->createCommand('SELECT ...')->query(); // some heave SQL query.
    
    Yii::app()->cache->set(
        $cacheKey, // cache key
        $value, // value to be cached
        3600, // cache expiration
        null, // dependency, empty in our case
        ['database', 'main'] // list of cache tags.
    );
}

You can clear all cache items associated with the specific tags using \yii1tech\cache\tagged\TagAwareCacheContract::invalidateTags() method. For example:

<?php

Yii::app()->cache->invalidateTags(['database']);

This extension provides several built-in cache drivers, which supports tags:

• \yii1tech\cache\tagged\MemCache
• \yii1tech\cache\tagged\DbCache
• \yii1tech\cache\tagged\ArrayCache

Please refer to the particular storage class for more details.