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<?php
/**
* W3 Database object
*/
if (!defined('ABSPATH')) {
die();
}
if (!class_exists('W3_Db_Driver')) {
require_once ABSPATH . 'wp-includes/wp-db.php';
class W3_Db_Driver extends wpdb {
}
}
//TODO: Added for backwards compatibility
if(!class_exists('W3_Db')){
/**
* Class W3_Db
* Database access mediator
*/
class W3_Db extends W3_Db_Driver {
/**
* Returns onject instance. Called by WP engine
*
* @return W3_Db
*/
static function instance() {
static $instances = array();
if (!isset($instances[0])) {
$processors = array();
$call_default_constructor = true;
// no caching during activation
$is_installing = (defined('WP_INSTALLING') && WP_INSTALLING);
$config = w3_instance('W3_Config');
if (!$is_installing && $config->get_boolean('dbcache.enabled')) {
$processors[] = w3_instance('W3_DbCache');
}
if (w3_is_dbcluster()) {
$processors[] = w3_instance('W3_Enterprise_DbCluster');
}
$processors[] = new W3_DbProcessor();
$class = __CLASS__;
$o = new $class($processors);
$underlying_manager = new W3_DbCallUnderlying($o);
foreach ($processors as $processor) {
$processor->manager = $o;
$processor->underlying_manager = $underlying_manager;
}
// initialize after processors configured
$o->initialize();
@$instances[0] = $o;
}
return $instances[0];
}
/*
* @param boolean $call_default_constructor
*/
function __construct($processors) {
$this->processors = $processors;
$this->processor = $processors[0];
$this->processor_number = 0;
}
/**
* Initializes object after processors configured. Called from instance() only
*/
function initialize() {
return $this->processor->initialize();
}
/**
* Overriten logic of wp_db by processor.
*/
function insert($table, $data, $format = null) {
return $this->processor->insert($table, $data, $format);
}
/**
* Overriten logic of wp_db by processor.
*/
function query($query) {
return $this->processor->query($query);
}
/**
* Overriten logic of wp_db by processor.
*/
function replace($table, $data, $format = null) {
return $this->processor->replace($table, $data, $format);
}
/**
* Overriten logic of wp_db by processor.
*/
function update($table, $data, $where, $format = null, $where_format = null) {
return $this->processor->update($table, $data, $where, $format, $where_format);
}
/**
* Overriten logic of wp_db by processor.
*/
function init_charset() {
return $this->processor->init_charset();
}
/**
* Overriten logic of wp_db by processor.
*/
function set_charset($dbh, $charset = null, $collate = null) {
return $this->processor->set_charset($dbh, $charset, $collate);
}
/**
* Overriten logic of wp_db by processor.
*/
function flush() {
return $this->processor->flush();
}
/**
* Overriten logic of wp_db by processor.
*/
function check_database_version($dbh_or_table = false) {
return $this->processor->check_database_version($dbh_or_table);
}
/**
* Overriten logic of wp_db by processor.
*/
function supports_collation( $dbh_or_table = false ) {
return $this->processor->supports_collation($dbh_or_table);
}
/**
* Overriten logic of wp_db by processor.
*/
function has_cap( $db_cap, $dbh_or_table = false ) {
return $this->processor->has_cap($db_cap, $dbh_or_table);
}
/**
* Overriten logic of wp_db by processor.
*/
function db_version( $dbh_or_table = false ) {
return $this->processor->db_version($dbh_or_table);
}
/**
* Default initialization method, calls wp_db apropriate method
*/
function default_initialize() {
parent::__construct(DB_USER, DB_PASSWORD, DB_NAME, DB_HOST);
}
/**
* Default implementation, calls wp_db apropriate method
*/
function default_insert($table, $data, $format = null) {
return parent::insert($table, $data, $format);
}
/**
* Default implementation, calls wp_db apropriate method
*/
function default_query($query) {
return parent::query($query);
}
/**
* Default implementation, calls wp_db apropriate method
*/
function default_replace($table, $data, $format = null) {
return parent::replace($table, $data, $format);
}
/**
* Default implementation, calls wp_db apropriate method
*/
function default_update($table, $data, $where, $format = null, $where_format = null) {
return parent::update($table, $data, $where, $format, $where_format);
}
/**
* Default implementation, calls wp_db apropriate method
*/
function default_init_charset() {
return parent::init_charset();
}
/**
* Default implementation, calls wp_db apropriate method
*/
function default_set_charset($dbh, $charset = null, $collate = null) {
return parent::set_charset($dbh, $charset, $collate);
}
/**
* Default implementation, calls wp_db apropriate method
*/
function default_flush() {
return parent::flush();
}
/**
* Default implementation, calls wp_db apropriate method
*/
function default_check_database_version($dbh_or_table = false) {
return parent::check_database_version($dbh_or_table);
}
/**
* Default implementation, calls wp_db apropriate method
*/
function default_supports_collation( $dbh_or_table = false ) {
return parent::supports_collation($dbh_or_table);
}
/**
* Default implementation, calls wp_db apropriate method
*/
function default_has_cap( $db_cap, $dbh_or_table = false ) {
return parent::has_cap($db_cap, $dbh_or_table);
}
/**
* Default implementation, calls wp_db apropriate method
*/
function default_db_version( $dbh_or_table = false ) {
return parent::db_version($dbh_or_table);
}
/**
* Default implementation, calls wp_db apropriate method
*/
function switch_active_processor($offset) {
$new_processor_number = $this->processor_number + $offset;
if ($new_processor_number <= 0) {
$new_processor_number = 0;
} else if ($new_processor_number >= count($this->processors)) {
$new_processor_number = count($this->processors) - 1;
}
$offset_made = $new_processor_number - $this->processor_number;
$this->processor_number = $new_processor_number;
$this->processor = $this->processors[$new_processor_number];
return $offset_made;
}
}
/**
* Class W3_DbProcessor
* Does separate operation without inheritance
*/
class W3_DbProcessor {
/**
* Top database-connection object.
* Initialized by W3_Db::instance
*
* @var object
*/
var $manager = null;
/**
* Database-connection using overrides of next processor in queue
* Initialized by W3_Db::instance
*
* @var object
*/
var $underlying_manager = null;
/**
* Placeholder for database initialization
*/
function initialize() {
return $this->manager->default_initialize();
}
/**
* Placeholder for apropriate wp_db method replacement.
* By default calls wp_db implementation
*/
function insert($table, $data, $format = null) {
return $this->manager->default_insert($table, $data, $format);
}
/**
* Placeholder for apropriate wp_db method replacement.
* By default calls wp_db implementation
*/
function query($query) {
return $this->manager->default_query($query);
}
/**
* Placeholder for apropriate wp_db method replacement.
* By default calls wp_db implementation
*/
function replace($table, $data, $format = null) {
return $this->manager->default_replace($table, $data, $format);
}
/**
* Placeholder for apropriate wp_db method replacement.
* By default calls wp_db implementation
*/
function update($table, $data, $where, $format = null, $where_format = null) {
return $this->manager->default_update($table, $data, $where, $format, $where_format);
}
/**
* Placeholder for apropriate wp_db method replacement.
* By default calls wp_db implementation
*/
function init_charset() {
return $this->manager->default_init_charset();
}
/**
* Placeholder for apropriate wp_db method replacement.
* By default calls wp_db implementation
*/
function set_charset($dbh, $charset = null, $collate = null) {
return $this->manager->default_set_charset($dbh, $charset, $collate);
}
/**
* Placeholder for apropriate wp_db method replacement.
* By default calls wp_db implementation
*/
function flush() {
return $this->manager->default_flush();
}
/**
* Placeholder for apropriate wp_db method replacement.
* By default calls wp_db implementation
*/
function check_database_version($dbh_or_table = false) {
return $this->manager->default_check_database_version($dbh_or_table);
}
/**
* Placeholder for apropriate wp_db method replacement.
* By default calls wp_db implementation
*/
function supports_collation( $dbh_or_table = false ) {
return $this->manager->default_supports_collation($dbh_or_table);
}
/**
* Placeholder for apropriate wp_db method replacement.
* By default calls wp_db implementation
*/
function has_cap( $db_cap, $dbh_or_table = false ) {
return $this->manager->default_has_cap($db_cap, $dbh_or_table);
}
/**
* Placeholder for apropriate wp_db method replacement.
* By default calls wp_db implementation
*/
function db_version( $dbh_or_table = false ) {
return $this->manager->default_db_version($dbh_or_table);
}
}
/**
* Class W3_DbCallUnderlying
*/
class W3_DbCallUnderlying {
function __construct($manager) {
$this->manager = $manager;
}
/**
* Calls underlying processor's aproptiate method of wp_db
*/
function initialize() {
$switched = $this->manager->switch_active_processor(1);
try {
$r = $this->manager->initialize();
$this->manager->switch_active_processor(-$switched);
return $r;
} catch (Exception $e) {
$this->manager->switch_active_processor(-$switched);
throw $e;
}
}
/**
* Calls underlying processor's aproptiate method of wp_db
*/
function flush() {
$switched = $this->manager->switch_active_processor(1);
try {
$r = $this->manager->flush();
$this->manager->switch_active_processor(-$switched);
return $r;
} catch (Exception $e) {
$this->manager->switch_active_processor(-$switched);
throw $e;
}
}
/**
* Calls underlying processor's aproptiate method of wp_db
*/
function query($query) {
$switched = $this->manager->switch_active_processor(1);
try {
$r = $this->manager->query($query);
$this->manager->switch_active_processor(-$switched);
return $r;
} catch (Exception $e) {
$this->manager->switch_active_processor(-$switched);
throw $e;
}
}
/**
* Calls underlying processor's aproptiate method of wp_db
*/
function insert($table, $data, $format = null) {
$switched = $this->manager->switch_active_processor(1);
try {
$r = $this->manager->insert($table, $data, $format);
$this->manager->switch_active_processor(-$switched);
return $r;
} catch (Exception $e) {
$this->manager->switch_active_processor(-$switched);
throw $e;
}
}
/**
* Calls underlying processor's aproptiate method of wp_db
*/
function replace($table, $data, $format = null) {
$switched = $this->manager->switch_active_processor(1);
try {
$r = $this->manager->replace($table, $data, $format);
$this->manager->switch_active_processor(-$switched);
return $r;
} catch (Exception $e) {
$this->manager->switch_active_processor(-$switched);
throw $e;
}
}
/**
* Calls underlying processor's aproptiate method of wp_db
*/
function update($table, $data, $where, $format = null, $where_format = null) {
$switched = $this->manager->switch_active_processor(1);
try {
$r = $this->manager->update($table, $data, $where, $format, $where_format);
$this->manager->switch_active_processor(-$switched);
return $r;
} catch (Exception $e) {
$this->manager->switch_active_processor(-$switched);
throw $e;
}
}
}
}
?>
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