423 lines
12 KiB
PHP
423 lines
12 KiB
PHP
<?php
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/**
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*
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* This file is part of phpFastCache.
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*
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* @license MIT License (MIT)
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*
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* For full copyright and license information, please see the docs/CREDITS.txt file.
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*
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* @author Khoa Bui (khoaofgod) <khoaofgod@gmail.com> http://www.phpfastcache.com
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* @author Georges.L (Geolim4) <contact@geolim4.com>
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*
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*/
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namespace phpFastCache\Drivers\Sqlite;
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use PDO;
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use PDOException;
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use phpFastCache\Core\Pool\DriverBaseTrait;
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use phpFastCache\Core\Pool\ExtendedCacheItemPoolInterface;
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use phpFastCache\Core\Pool\IO\IOHelperTrait;
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use phpFastCache\Exceptions\phpFastCacheDriverCheckException;
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use phpFastCache\Exceptions\phpFastCacheInvalidArgumentException;
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use phpFastCache\Exceptions\phpFastCacheIOException;
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use Psr\Cache\CacheItemInterface;
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/**
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* Class Driver
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* @package phpFastCache\Drivers
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* @todo Remove "exp" column in V7
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*/
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class Driver implements ExtendedCacheItemPoolInterface
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{
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use DriverBaseTrait, IOHelperTrait;
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/**
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*
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*/
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const FILE_DIR = 'sqlite';
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/**
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*
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*/
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const INDEXING_FILE = 'indexing';
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/**
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* @var int
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*/
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protected $maxSize = 10; // 10 mb
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/**
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* @var int
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*/
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protected $currentDB = 1;
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/**
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* @var string
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*/
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protected $SqliteDir = '';
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/**
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* @var \PDO
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*/
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protected $indexing;
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/**
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* Driver constructor.
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* @param array $config
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* @throws phpFastCacheDriverCheckException
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* @throws phpFastCacheIOException
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*/
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public function __construct(array $config = [])
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{
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$this->setup($config);
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if (!$this->driverCheck()) {
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throw new phpFastCacheDriverCheckException(sprintf(self::DRIVER_CHECK_FAILURE, $this->getDriverName()));
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} else {
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if (!file_exists($this->getSqliteDir()) && !@mkdir($this->getSqliteDir(), $this->getDefaultChmod(), true)) {
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throw new phpFastCacheIOException(sprintf('Sqlite cannot write in "%s", aborting...', $this->getPath()));
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} else {
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$this->driverConnect();
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}
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}
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}
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/**
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* @return string
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* @throws \phpFastCache\Exceptions\phpFastCacheCoreException
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*/
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public function getSqliteDir()
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{
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return $this->SqliteDir ?: $this->getPath() . DIRECTORY_SEPARATOR . self::FILE_DIR;
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}
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/**
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* @return bool
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*/
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public function driverCheck()
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{
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return extension_loaded('pdo_sqlite') && (is_writable($this->getSqliteDir()) || @mkdir($this->getSqliteDir(), $this->getDefaultChmod(), true));
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}
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/**
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* INIT NEW DB
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* @param \PDO $db
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*/
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public function initDB(\PDO $db)
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{
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$db->exec('drop table if exists "caching"');
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$db->exec('CREATE TABLE "caching" ("id" INTEGER PRIMARY KEY AUTOINCREMENT, "keyword" VARCHAR UNIQUE, "object" BLOB, "exp" INTEGER)');
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$db->exec('CREATE UNIQUE INDEX "cleanup" ON "caching" ("keyword","exp")');
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$db->exec('CREATE INDEX "exp" ON "caching" ("exp")');
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$db->exec('CREATE UNIQUE INDEX "keyword" ON "caching" ("keyword")');
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}
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/**
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* INIT Indexing DB
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* @param \PDO $db
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*/
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public function initIndexing(\PDO $db)
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{
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// delete everything before reset indexing
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$dir = opendir($this->SqliteDir);
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while ($file = readdir($dir)) {
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if ($file != '.' && $file != '..' && $file != 'indexing' && $file != 'dbfastcache') {
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unlink($this->SqliteDir . '/' . $file);
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}
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}
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$db->exec('drop table if exists "balancing"');
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$db->exec('CREATE TABLE "balancing" ("keyword" VARCHAR PRIMARY KEY NOT NULL UNIQUE, "db" INTEGER)');
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$db->exec('CREATE INDEX "db" ON "balancing" ("db")');
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$db->exec('CREATE UNIQUE INDEX "lookup" ON "balancing" ("keyword")');
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}
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/**
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* INIT Instant DB
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* Return Database of Keyword
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* @param $keyword
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* @return int
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*/
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public function indexing($keyword)
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{
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if ($this->indexing == null) {
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$createTable = false;
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if (!file_exists($this->SqliteDir . '/indexing')) {
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$createTable = true;
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}
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$PDO = new PDO("sqlite:" . $this->SqliteDir . '/' . self::INDEXING_FILE);
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$PDO->setAttribute(PDO::ATTR_ERRMODE,
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PDO::ERRMODE_EXCEPTION);
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if ($createTable == true) {
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$this->initIndexing($PDO);
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}
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// Added by Observium developers
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// Improve write speed, see:
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// http://stackoverflow.com/questions/1711631/improve-insert-per-second-performance-of-sqlite
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$PDO->exec('PRAGMA synchronous=OFF');
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$PDO->exec('PRAGMA journal_mode=MEMORY');
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$PDO->exec('PRAGMA temp_store=MEMORY');
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//$PDO->exec('PRAGMA count_changes=false');
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$this->indexing = $PDO;
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unset($PDO);
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$stm = $this->indexing->prepare("SELECT MAX(`db`) as `db` FROM `balancing`");
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$stm->execute();
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$row = $stm->fetch(PDO::FETCH_ASSOC);
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if (!isset($row[ 'db' ])) {
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$db = 1;
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} elseif ($row[ 'db' ] <= 1) {
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$db = 1;
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} else {
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$db = $row[ 'db' ];
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}
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// check file size
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$size = file_exists($this->SqliteDir . '/db' . $db) ? filesize($this->SqliteDir . '/db' . $db) : 1;
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$size = round($size / 1024 / 1024, 1);
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if ($size > $this->maxSize) {
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$db++;
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}
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$this->currentDB = $db;
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}
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// look for keyword
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$stm = $this->indexing->prepare("SELECT * FROM `balancing` WHERE `keyword`=:keyword LIMIT 1");
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$stm->execute([
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':keyword' => $keyword,
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]);
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$row = $stm->fetch(PDO::FETCH_ASSOC);
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if (isset($row[ 'db' ]) && $row[ 'db' ] != '') {
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$db = $row[ 'db' ];
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} else {
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/*
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* Insert new to Indexing
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*/
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$db = $this->currentDB;
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$stm = $this->indexing->prepare("INSERT INTO `balancing` (`keyword`,`db`) VALUES(:keyword, :db)");
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$stm->execute([
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':keyword' => $keyword,
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':db' => $db,
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]);
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}
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return $db;
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}
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/**
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* @param $keyword
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* @param bool $reset
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* @return PDO
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*/
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public function getDb($keyword, $reset = false)
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{
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/**
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* Default is fastcache
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*/
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$instant = $this->indexing($keyword);
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/**
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* init instant
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*/
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if (!isset($this->instance[ $instant ])) {
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// check DB Files ready or not
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$createTable = false;
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if (!file_exists($this->SqliteDir . '/db' . $instant) || $reset == true) {
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$createTable = true;
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}
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$PDO = new PDO('sqlite:' . $this->SqliteDir . '/db' . $instant);
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$PDO->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
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if ($createTable == true) {
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$this->initDB($PDO);
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}
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// Added by Observium developers
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// Improve write speed, see:
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// http://stackoverflow.com/questions/1711631/improve-insert-per-second-performance-of-sqlite
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$PDO->exec('PRAGMA synchronous=OFF');
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$PDO->exec('PRAGMA journal_mode=MEMORY');
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$PDO->exec('PRAGMA temp_store=MEMORY');
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//$PDO->exec('PRAGMA count_changes=false');
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$this->instance[ $instant ] = $PDO;
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unset($PDO);
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}
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return $this->instance[ $instant ];
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}
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/**
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* @param \Psr\Cache\CacheItemInterface $item
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* @return mixed
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* @throws phpFastCacheInvalidArgumentException
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*/
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protected function driverWrite(CacheItemInterface $item)
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{
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/**
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* Check for Cross-Driver type confusion
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*/
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if ($item instanceof Item) {
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$skipExisting = isset($this->config[ 'skipExisting' ]) ? $this->config[ 'skipExisting' ] : false;
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$toWrite = true;
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// check in cache first
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$in_cache = $this->driverRead($item);
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if ($skipExisting == true) {
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if ($in_cache == null) {
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$toWrite = true;
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} else {
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$toWrite = false;
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}
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}
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if ($toWrite == true) {
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$sql = "INSERT OR REPLACE INTO `caching` (`keyword`,`object`,`exp`) values(:keyword,:object,:exp)";
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try {
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$stm = $this->getDb($item->getKey())
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->prepare($sql);
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$stm->execute([
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':keyword' => $item->getKey(),
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':object' => $this->encode($this->driverPreWrap($item)),
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':exp' => $item->getExpirationDate()->getTimestamp(),
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]);
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return true;
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} catch (\PDOException $e) {
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try {
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$stm = $this->getDb($item->getKey(), true)
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->prepare($sql);
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$stm->execute([
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':keyword' => $item->getKey(),
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':object' => $this->encode($this->driverPreWrap($item)),
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':exp' => $item->getExpirationDate()->getTimestamp(),
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]);
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} catch (PDOException $e) {
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return false;
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}
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}
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}
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return false;
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} else {
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throw new phpFastCacheInvalidArgumentException('Cross-Driver type confusion detected');
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}
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}
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/**
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* @param \Psr\Cache\CacheItemInterface $item
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* @return null|array
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*/
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protected function driverRead(CacheItemInterface $item)
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{
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$sql = "SELECT * FROM `caching` WHERE `keyword`=:keyword LIMIT 1";
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try {
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$stm = $this->getDb($item->getKey())
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->prepare($sql);
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$stm->execute([
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':keyword' => $item->getKey(),
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]);
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$row = $stm->fetch(PDO::FETCH_ASSOC);
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} catch (PDOException $e) {
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try {
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$stm = $this->getDb($item->getKey(), true)
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->prepare($sql);
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$stm->execute([
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':keyword' => $item->getKey(),
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]);
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$row = $stm->fetch(PDO::FETCH_ASSOC);
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} catch (PDOException $e) {
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return null;
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}
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}
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if (isset($row[ 'object' ])) {
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return $this->decode($row[ 'object' ]);
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}
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return null;
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}
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/**
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* @param \Psr\Cache\CacheItemInterface $item
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* @return bool
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* @throws phpFastCacheInvalidArgumentException
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*/
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protected function driverDelete(CacheItemInterface $item)
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{
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/**
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* Check for Cross-Driver type confusion
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*/
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if ($item instanceof Item) {
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try {
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$stm = $this->getDb($item->getKey())
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->prepare("DELETE FROM `caching` WHERE (`exp` <= :U) OR (`keyword`=:keyword) ");
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return $stm->execute([
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':keyword' => $item->getKey(),
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':U' => time(),
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]);
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} catch (PDOException $e) {
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return false;
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}
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} else {
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throw new phpFastCacheInvalidArgumentException('Cross-Driver type confusion detected');
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}
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}
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/**
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* @return bool
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*/
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protected function driverClear()
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{
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$this->instance = [];
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$this->indexing = null;
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// delete everything before reset indexing
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$dir = opendir($this->getSqliteDir());
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while ($file = readdir($dir)) {
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if ($file != '.' && $file != '..') {
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unlink($this->getSqliteDir() . '/' . $file);
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}
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}
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return true;
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}
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/**
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* @return bool
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*/
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protected function driverConnect()
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{
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if (!file_exists($this->getPath() . '/' . self::FILE_DIR)) {
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if (!mkdir($this->getPath() . '/' . self::FILE_DIR, $this->getDefaultChmod(), true)
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) {
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$this->fallback = true;
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}
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}
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$this->SqliteDir = $this->getPath() . '/' . self::FILE_DIR;
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return true;
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}
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/**
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* @return array
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*/
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public function __sleep()
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{
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return array_diff(array_keys(get_object_vars($this)), ['indexing', 'instance']);
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}
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} |