141 lines
3.7 KiB
PHP
141 lines
3.7 KiB
PHP
<?php
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class Doctrine_DB extends PDO implements Countable, IteratorAggregate {
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/**
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* default DSN
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*/
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const DSN = "mysql://root:dc34@localhost/test";
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/**
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* executed queries
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*/
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private $queries = array();
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/**
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* execution times of the executed queries
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*/
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private $exectimes = array();
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/**
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* constructor
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* @param string $dsn
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* @param string $username
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* @param string $password
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*/
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public function __construct($dsn,$username,$password) {
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parent::__construct($dsn,$username,$password);
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$this->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
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$this->setAttribute(PDO::ATTR_STATEMENT_CLASS, array("Doctrine_DBStatement",array($this)));
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}
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public static function getConn($dsn,$username = null, $password = null) {
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static $instance;
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if( ! isset($instance)) {
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$instance = new Doctrine_DB($dsn,$username,$password);
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}
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return $instance;
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}
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/**
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* @param string $dsn PEAR::DB like DSN
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* format: schema://user:password@address/dbname
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*/
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public static function getConnection($dsn = null) {
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static $instance = array();
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$md5 = md5($dsn);
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if( ! isset($instance[$md5])) {
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if( ! isset($dsn)) {
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$a = parse_url(self::DSN);
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} else {
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$a = parse_url($dsn);
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}
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$e = array();
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$e[0] = $a["scheme"].":host=".$a["host"].";dbname=".substr($a["path"],1);
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$e[1] = $a["user"];
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$e[2] = $a["pass"];
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$instance[$md5] = new Doctrine_DB($e[0],$e[1],$e[2]);
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}
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return $instance[$md5];
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}
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/**
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* @param string $query query to be executed
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*/
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public function query($query) {
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try {
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$this->queries[] = $query;
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$time = microtime();
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$stmt = parent::query($query);
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$this->exectimes[] = (microtime() - $time);
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return $stmt;
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} catch(PDOException $e) {
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throw $e;
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}
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}
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/**
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* @param string $query query to be prepared
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*/
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public function prepare($query) {
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$this->queries[] = $query;
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return parent::prepare($query);
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}
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/**
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* @param string $time exectime of the last executed query
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* @return void
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*/
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public function addExecTime($time) {
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$this->exectimes[] = $time;
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}
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public function getExecTimes() {
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return $this->exectimes;
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}
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/**
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* @return array an array of executed queries
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*/
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public function getQueries() {
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return $this->queries;
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}
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/**
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* @return ArrayIterator
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*/
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public function getIterator() {
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return new ArrayIterator($this->queries);
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}
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/**
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* returns the number of executed queries
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* @return integer
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*/
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public function count() {
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return count($this->queries);
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}
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}
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class Doctrine_DBStatement extends PDOStatement {
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/**
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* @param Doctrine_DB $dbh Doctrine Database Handler
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*/
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private $dbh;
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/**
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* @param Doctrine_DB $dbh
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*/
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private function __construct(Doctrine_DB $dbh) {
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$this->dbh = $dbh;
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}
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/**
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* @param array $params
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*/
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public function execute(array $params = null) {
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$time = microtime();
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$result = parent::execute($params);
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$exectime = (microtime() - $time);
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$this->dbh->addExecTime($exectime);
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return $result;
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}
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}
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?>
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