303 lines
6.9 KiB
PHP
303 lines
6.9 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Stopwatch;
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/**
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* Stopwatch provides a way to profile code.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class Stopwatch
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{
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/**
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* @var Section[]
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*/
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private $sections;
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/**
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* @var array
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*/
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private $activeSections;
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public function __construct()
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{
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$this->sections = $this->activeSections = array('__root__' => new Section('__root__'));
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}
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/**
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* Creates a new section or re-opens an existing section.
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*
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* @param string|null $id The id of the session to re-open, null to create a new one
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*
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* @throws \LogicException When the section to re-open is not reachable
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*/
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public function openSection($id = null)
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{
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$current = end($this->activeSections);
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if (null !== $id && null === $current->get($id)) {
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throw new \LogicException(sprintf('The section "%s" has been started at an other level and can not be opened.', $id));
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}
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$this->start('__section__.child', 'section');
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$this->activeSections[] = $current->open($id);
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$this->start('__section__');
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}
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/**
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* Stops the last started section.
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*
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* The id parameter is used to retrieve the events from this section.
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*
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* @see getSectionEvents()
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*
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* @param string $id The identifier of the section
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*
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* @throws \LogicException When there's no started section to be stopped
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*/
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public function stopSection($id)
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{
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$this->stop('__section__');
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if (1 == count($this->activeSections)) {
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throw new \LogicException('There is no started section to stop.');
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}
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$this->sections[$id] = array_pop($this->activeSections)->setId($id);
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$this->stop('__section__.child');
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}
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/**
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* Starts an event.
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*
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* @param string $name The event name
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* @param string $category The event category
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*
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* @return StopwatchEvent A StopwatchEvent instance
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*/
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public function start($name, $category = null)
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{
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return end($this->activeSections)->startEvent($name, $category);
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}
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/**
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* Checks if the event was started.
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*
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* @param string $name The event name
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*
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* @return bool
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*/
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public function isStarted($name)
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{
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return end($this->activeSections)->isEventStarted($name);
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}
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/**
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* Stops an event.
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*
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* @param string $name The event name
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*
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* @return StopwatchEvent A StopwatchEvent instance
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*/
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public function stop($name)
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{
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return end($this->activeSections)->stopEvent($name);
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}
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/**
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* Stops then restarts an event.
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*
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* @param string $name The event name
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*
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* @return StopwatchEvent A StopwatchEvent instance
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*/
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public function lap($name)
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{
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return end($this->activeSections)->stopEvent($name)->start();
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}
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/**
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* Gets all events for a given section.
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*
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* @param string $id A section identifier
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*
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* @return StopwatchEvent[] An array of StopwatchEvent instances
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*/
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public function getSectionEvents($id)
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{
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return isset($this->sections[$id]) ? $this->sections[$id]->getEvents() : array();
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}
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}
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/**
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* @internal This class is for internal usage only
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class Section
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{
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/**
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* @var StopwatchEvent[]
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*/
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private $events = array();
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/**
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* @var null|float
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*/
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private $origin;
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/**
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* @var string
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*/
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private $id;
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/**
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* @var Section[]
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*/
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private $children = array();
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/**
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* Constructor.
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*
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* @param float|null $origin Set the origin of the events in this section, use null to set their origin to their start time
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*/
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public function __construct($origin = null)
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{
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$this->origin = is_numeric($origin) ? $origin : null;
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}
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/**
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* Returns the child section.
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*
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* @param string $id The child section identifier
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*
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* @return Section|null The child section or null when none found
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*/
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public function get($id)
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{
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foreach ($this->children as $child) {
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if ($id === $child->getId()) {
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return $child;
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}
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}
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}
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/**
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* Creates or re-opens a child section.
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*
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* @param string|null $id null to create a new section, the identifier to re-open an existing one.
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*
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* @return Section A child section
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*/
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public function open($id)
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{
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if (null === $session = $this->get($id)) {
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$session = $this->children[] = new self(microtime(true) * 1000);
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}
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return $session;
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}
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/**
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* @return string The identifier of the section
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*/
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public function getId()
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{
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return $this->id;
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}
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/**
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* Sets the session identifier.
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*
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* @param string $id The session identifier
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*
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* @return Section The current section
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*/
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public function setId($id)
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{
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$this->id = $id;
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return $this;
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}
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/**
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* Starts an event.
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*
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* @param string $name The event name
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* @param string $category The event category
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*
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* @return StopwatchEvent The event
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*/
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public function startEvent($name, $category)
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{
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if (!isset($this->events[$name])) {
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$this->events[$name] = new StopwatchEvent($this->origin ?: microtime(true) * 1000, $category);
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}
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return $this->events[$name]->start();
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}
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/**
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* Checks if the event was started.
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*
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* @param string $name The event name
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*
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* @return bool
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*/
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public function isEventStarted($name)
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{
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return isset($this->events[$name]) && $this->events[$name]->isStarted();
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}
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/**
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* Stops an event.
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*
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* @param string $name The event name
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*
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* @return StopwatchEvent The event
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*
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* @throws \LogicException When the event has not been started
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*/
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public function stopEvent($name)
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{
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if (!isset($this->events[$name])) {
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throw new \LogicException(sprintf('Event "%s" is not started.', $name));
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}
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return $this->events[$name]->stop();
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}
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/**
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* Stops then restarts an event.
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*
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* @param string $name The event name
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*
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* @return StopwatchEvent The event
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*
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* @throws \LogicException When the event has not been started
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*/
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public function lap($name)
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{
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return $this->stopEvent($name)->start();
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}
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/**
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* Returns the events from this section.
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*
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* @return StopwatchEvent[] An array of StopwatchEvent instances
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*/
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public function getEvents()
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{
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return $this->events;
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}
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}
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