yiisoft/cache-db

Yii Caching Library - DB Handler

1.0.0 2023-05-09 18:27 UTC

Requires

• php: ^8.0
• ext-pdo: *
• psr/log: ^2.0|^3.0
• psr/simple-cache: ^2.0|^3.0
• yiisoft/db: ^1.0

Requires (Dev)

• maglnet/composer-require-checker: ^4.2
• phpunit/phpunit: ^9.6|^10.1
• rector/rector: ^0.16.0
• roave/infection-static-analysis-plugin: ^1.25|^1.30
• spatie/phpunit-watcher: ^1.23
• vimeo/psalm: ^4.8|^5.8
• yiisoft/cache: ^3.0
• yiisoft/log: ^2.0

Suggests

• yiisoft/log: ^2.0

Provides

• psr/simple-cache-implementation: 1.0.0

BSD-3-Clause

• framework
• cache
• db
• yii
• psr-16

README

Yii Cache Library - DB Handler

This package implements database-based PSR-16 cache.

Supported databases

Packages	PHP	Versions	CI-Actions
[db-mssql]	8.0 - 8.2	2017 - 2022
[db-mysql/mariadb]	8.0 - 8.2	5.7-8.0/10.4-10.10
[db-oracle]	8.0 - 8.2	11C - 21C
[db-pgsql]	8.0 - 8.2	9.0 - 15.0
[db-sqlite]	8.0 - 8.2	3:latest

Requirements

• PHP 8.0 or higher.
• PDO PHP extension.

Installation

The package could be installed with composer:

composer require yiisoft/cache-db --prefer-dist

Create database connection

For more information see yiisoft/db.

Database Preparing

Package provides two way for preparing database:

1. Raw SQL. You can use it with the migration package used in your application.

   • Ensure tables:

     • MSSQL,
     • MySQL / MariaDB,
     • Oracle,
     • PostgreSQL
     • SQLite

   • Ensure no tables:

     • MSSQL,
     • MySQL / MariaDB,
     • Oracle,
     • PostgreSQL
     • SQLite

2. DbSchemaManager for ensureTable(), ensureNoTable() methods for cache table (by default {{%yii_cache}}).

// Create db schema manager
$dbSchemaManager = new DbSchemaManager($db);

// Ensure table with default name
$dbSchemaManager->ensureTable();

// Ensure table with custom name
$dbSchemaManager->ensureTable('{{%custom_cache_table}}');

// Ensure no table with default name
$dbSchemaManager->ensureNoTable();

// Ensure no table with custom name
$dbSchemaManager->ensureNoTable('{{%custom_cache_table}}');

Configuration

When creating an instance of \Yiisoft\Cache\Db\DbCache, you must pass an instance of the database connection.

$cache = new \Yiisoft\Cache\Db\DbCache($db, $table, $gcProbability);

• $db (\Yiisoft\Db\Connection\ConnectionInterface) - The database connection instance.
• $table (string) - The name of the database table to store the cache data. Defaults to "cache".
• $gcProbability (int) - The probability (parts per million) that garbage collection (GC) should be performed when storing a piece of data in the cache. Defaults to 100, meaning 0.01% chance. This number should be between 0 and 1000000. A value 0 meaning no GC will be performed at all.

General usage

The package does not contain any additional functionality for interacting with the cache, except those defined in the PSR-16 interface.

$cache = new \Yiisoft\Cache\Db\DbCache($db);
$parameters = ['user_id' => 42];
$key = 'demo';

// try retrieving $data from cache
$data = $cache->get($key);

if ($data === null) {
    // $data is not found in cache, calculate it from scratch
    $data = calculateData($parameters);
    
    // store $data in cache for an hour so that it can be retrieved next time
    $cache->set($key, $data, 3600);
}

// $data is available here

In order to delete value you can use:

$cache->delete($key);
// Or all cache
$cache->clear();

To work with values in a more efficient manner, batch operations should be used:

• getMultiple()
• setMultiple()
• deleteMultiple()

This package can be used as a cache handler for the Yii Caching Library.

Additional logging

In order to log details about failures you may set a logger instance. It should be Psr\Log\LoggerInterface::class. For example, you can use yiisoft\Log:

$cache = new \Yiisoft\Cache\Db\DbCache($db, $table, $gcProbability);
$cache->setLogger(new \Yiisoft\Log\Logger());

This allows you to log cache operations, when ocurring errors, etc.

Support

If you need help or have a question, the Yii Forum is a good place for that. You may also check out other Yii Community Resources.

Testing

Check the testing instructions to learn about testing.

Support the project

Follow updates

License

The Yii Cache Library - DB Handler is free software. It is released under the terms of the BSD License. Please see LICENSE for more information.

Maintained by Yii Software.