BenchmarkParse::getRevIdForTime() - Code Metrics - wikimedia/mediawiki - Measure and Improve Code Quality continuously with Scrutinizer

BenchmarkParse::getRevIdForTime() A
last analyzed 2016-11-13 17:42 UTC

↳ Parent: BenchmarkParse

Complexity

Conditions	1
Paths	1

Size

Total Lines	18
Code Lines	12

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	1
eloc	12
nc	1
nop	2
dl	0
loc	18
rs	9.4285
c	0
b	0
f	0

<?php

/**
 * Benchmark script for parse operations
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 * @author Tim Starling <[email protected]>
 * @ingroup Benchmark
 */

require __DIR__ . '/../Maintenance.php';

use MediaWiki\MediaWikiServices;

/**
 * Maintenance script to benchmark how long it takes to parse a given title at an optionally
 * specified timestamp
 *
 * @since 1.23
 */
class BenchmarkParse extends Maintenance {
	/** @var string MediaWiki concatenated string timestamp (YYYYMMDDHHMMSS) */
	private $templateTimestamp = null;

	private $clearLinkCache = false;

	/**
	 * @var LinkCache
	 */
	private $linkCache;

	/** @var array Cache that maps a Title DB key to revision ID for the requested timestamp */
	private $idCache = [];

	function __construct() {
		parent::__construct();
		$this->addDescription( 'Benchmark parse operation' );
		$this->addArg( 'title', 'The name of the page to parse' );
		$this->addOption( 'warmup', 'Repeat the parse operation this number of times to warm the cache',
			false, true );
		$this->addOption( 'loops', 'Number of times to repeat parse operation post-warmup',
			false, true );
		$this->addOption( 'page-time',
			'Use the version of the page which was current at the given time',
			false, true );
		$this->addOption( 'tpl-time',
			'Use templates which were current at the given time (except that moves and ' .
			'deletes are not handled properly)',
			false, true );
		$this->addOption( 'reset-linkcache', 'Reset the LinkCache after every parse.',
			false, false );
	}

	function execute() {
		if ( $this->hasOption( 'tpl-time' ) ) {
			$this->templateTimestamp = wfTimestamp( TS_MW, strtotime( $this->getOption( 'tpl-time' ) ) );
class Id
{
    public $id;

    public function __construct($id)
    {
        $this->id = $id;
    }

}

class Account
{
    /** @var  Id $id */
    public $id;
}

$account_id = false;

if (starsAreRight()) {
    $account_id = new Id(42);
}

$account = new Account();
if ($account instanceof Id)
{
    $account->id = $account_id;
}
			Hooks::register( 'BeforeParserFetchTemplateAndtitle', [ $this, 'onFetchTemplate' ] );
		}

		$this->clearLinkCache = $this->hasOption( 'reset-linkcache' );
		// Set as a member variable to avoid function calls when we're timing the parse
		$this->linkCache = MediaWikiServices::getInstance()->getLinkCache();

		$title = Title::newFromText( $this->getArg() );
		if ( !$title ) {
			$this->error( "Invalid title" );
			exit( 1 );

		}

		if ( $this->hasOption( 'page-time' ) ) {
			$pageTimestamp = wfTimestamp( TS_MW, strtotime( $this->getOption( 'page-time' ) ) );
			$id = $this->getRevIdForTime( $title, $pageTimestamp );
<?php

function getDate($date)
{
    if ($date !== null) {
        return new DateTime($date);
    }

    return false;
}
			if ( !$id ) {
				$this->error( "The page did not exist at that time" );
				exit( 1 );

			}

			$revision = Revision::newFromId( $id );
		} else {
			$revision = Revision::newFromTitle( $title );
		}

		if ( !$revision ) {
			$this->error( "Unable to load revision, incorrect title?" );
			exit( 1 );

		}

		$warmup = $this->getOption( 'warmup', 1 );
		for ( $i = 0; $i < $warmup; $i++ ) {
			$this->runParser( $revision );
		}

		$loops = $this->getOption( 'loops', 1 );
		if ( $loops < 1 ) {
			$this->error( 'Invalid number of loops specified', true );
		}
		$startUsage = getrusage();
		$startTime = microtime( true );
		for ( $i = 0; $i < $loops; $i++ ) {
			$this->runParser( $revision );
		}
		$endUsage = getrusage();
		$endTime = microtime( true );

		printf( "CPU time = %.3f s, wall clock time = %.3f s\n",
			// CPU time
			( $endUsage['ru_utime.tv_sec'] + $endUsage['ru_utime.tv_usec'] * 1e-6
			- $startUsage['ru_utime.tv_sec'] - $startUsage['ru_utime.tv_usec'] * 1e-6 ) / $loops,
			// Wall clock time
			( $endTime - $startTime ) / $loops
		);
	}

	/**
	 * Fetch the ID of the revision of a Title that occurred
	 *
	 * @param Title $title
	 * @param string $timestamp
	 * @return bool|string Revision ID, or false if not found or error
	 */
	function getRevIdForTime( Title $title, $timestamp ) {
		$dbr = $this->getDB( DB_REPLICA );

		$id = $dbr->selectField(
			[ 'revision', 'page' ],
			'rev_id',
			[
				'page_namespace' => $title->getNamespace(),
				'page_title' => $title->getDBkey(),
				'rev_timestamp <= ' . $dbr->addQuotes( $timestamp )
			],
			__METHOD__,
			[ 'ORDER BY' => 'rev_timestamp DESC', 'LIMIT' => 1 ],
			[ 'revision' => [ 'INNER JOIN', 'rev_page=page_id' ] ]
		);

		return $id;
	}

	/**
	 * Parse the text from a given Revision
	 *
	 * @param Revision $revision
	 */
	function runParser( Revision $revision ) {
		$content = $revision->getContent();
		$content->getParserOutput( $revision->getTitle(), $revision->getId() );
/** @return stdClass|null */
function mayReturnNull() { }

function doesNotAcceptNull(stdClass $x) { }

// With potential error.
function withoutCheck() {
    $x = mayReturnNull();
    doesNotAcceptNull($x); // Potential error here.
}

// Safe - Alternative 1
function withCheck1() {
    $x = mayReturnNull();
    if ( ! $x instanceof stdClass) {
        throw new \LogicException('$x must be defined.');
    }
    doesNotAcceptNull($x);
}

// Safe - Alternative 2
function withCheck2() {
    $x = mayReturnNull();
    if ($x instanceof stdClass) {
        doesNotAcceptNull($x);
    }
}
		if ( $this->clearLinkCache ) {
			$this->linkCache->clear();
		}
	}

	/**
	 * Hook into the parser's revision ID fetcher. Make sure that the parser only
	 * uses revisions around the specified timestamp.
	 *
	 * @param Parser $parser
	 * @param Title $title
	 * @param bool &$skip
	 * @param string|bool &$id
	 * @return bool
	 */
	function onFetchTemplate( Parser $parser, Title $title, &$skip, &$id ) {
		$pdbk = $title->getPrefixedDBkey();
		if ( !isset( $this->idCache[$pdbk] ) ) {
			$proposedId = $this->getRevIdForTime( $title, $this->templateTimestamp );
			$this->idCache[$pdbk] = $proposedId;
		}
		if ( $this->idCache[$pdbk] !== false ) {
			$id = $this->idCache[$pdbk];
		}

		return true;
	}
}

$maintClass = 'BenchmarkParse';
require RUN_MAINTENANCE_IF_MAIN;


1			<?php
			0 ignored issues – show Coding Style Compatibility introduced 2016-02-23 18:14 UTC by Report Bug Copy Issue Report For compatibility and reusability of your code, PSR1 recommends that a file should introduce either new symbols (like classes, functions, etc.) or have side-effects (like outputting something, or including other files), but not both at the same time. The first symbol is defined on line 35 and the first side effect is on line 25. The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file. The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place. To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1. Loading history...
2			/**
3			* Benchmark script for parse operations
4			*
5			* This program is free software; you can redistribute it and/or modify
6			* it under the terms of the GNU General Public License as published by
7			* the Free Software Foundation; either version 2 of the License, or
8			* (at your option) any later version.
9			*
10			* This program is distributed in the hope that it will be useful,
11			* but WITHOUT ANY WARRANTY; without even the implied warranty of
12			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13			* GNU General Public License for more details.
14			*
15			* You should have received a copy of the GNU General Public License along
16			* with this program; if not, write to the Free Software Foundation, Inc.,
17			* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18			* http://www.gnu.org/copyleft/gpl.html
19			*
20			* @file
21			* @author Tim Starling <[email protected]>
22			* @ingroup Benchmark
23			*/
24
25			require __DIR__ . '/../Maintenance.php';
26
27			use MediaWiki\MediaWikiServices;
28
29			/**
30			* Maintenance script to benchmark how long it takes to parse a given title at an optionally
31			* specified timestamp
32			*
33			* @since 1.23
34			*/
35			class BenchmarkParse extends Maintenance {
36			/** @var string MediaWiki concatenated string timestamp (YYYYMMDDHHMMSS) */
37			private $templateTimestamp = null;
38
39			private $clearLinkCache = false;
40
41			/**
42			* @var LinkCache
43			*/
44			private $linkCache;
45
46			/** @var array Cache that maps a Title DB key to revision ID for the requested timestamp */
47			private $idCache = [];
48
49			function __construct() {
50			parent::__construct();
51			$this->addDescription( 'Benchmark parse operation' );
52			$this->addArg( 'title', 'The name of the page to parse' );
53			$this->addOption( 'warmup', 'Repeat the parse operation this number of times to warm the cache',
54			false, true );
55			$this->addOption( 'loops', 'Number of times to repeat parse operation post-warmup',
56			false, true );
57			$this->addOption( 'page-time',
58			'Use the version of the page which was current at the given time',
59			false, true );
60			$this->addOption( 'tpl-time',
61			'Use templates which were current at the given time (except that moves and ' .
62			'deletes are not handled properly)',
63			false, true );
64			$this->addOption( 'reset-linkcache', 'Reset the LinkCache after every parse.',
65			false, false );
66			}
67
68			function execute() {
69			if ( $this->hasOption( 'tpl-time' ) ) {
70			$this->templateTimestamp = wfTimestamp( TS_MW, strtotime( $this->getOption( 'tpl-time' ) ) );
			0 ignored issues – show Documentation Bug introduced 2016-01-16 18:00 UTC by Report Bug Copy Issue Report It seems like `wfTimestamp(TS_MW, strto...getOption('tpl-time')))` can also be of type `false`. However, the property `$templateTimestamp` is declared as type `string`. Maybe add an additional type check? Our type inference engine has found a suspicous assignment of a value to a property. This check raises an issue when a value that can be of a mixed type is assigned to a property that is type hinted more strictly. For example, imagine you have a variable `$accountId` that can either hold an Id object or false (if there is no account id yet). Your code now assigns that value to the `id` property of an instance of the `Account` class. This class holds a proper account, so the id value must no longer be false. Either this assignment is in error or a type check should be added for that assignment. class Id { public $id; public function __construct($id) { $this->id = $id; } } class Account { /** @var Id $id */ public $id; } $account_id = false; if (starsAreRight()) { $account_id = new Id(42); } $account = new Account(); if ($account instanceof Id) { $account->id = $account_id; } Loading history...
71			Hooks::register( 'BeforeParserFetchTemplateAndtitle', [ $this, 'onFetchTemplate' ] );
72			}
73
74			$this->clearLinkCache = $this->hasOption( 'reset-linkcache' );
75			// Set as a member variable to avoid function calls when we're timing the parse
76			$this->linkCache = MediaWikiServices::getInstance()->getLinkCache();
77
78			$title = Title::newFromText( $this->getArg() );
79			if ( !$title ) {
80			$this->error( "Invalid title" );
81			exit( 1 );
			0 ignored issues – show Coding Style Compatibility introduced 2016-01-16 18:00 UTC by Report Bug Copy Issue Report The method `execute()` contains an exit expression. An exit expression should only be used in rare cases. For example, if you write a short command line script. In most cases however, using an `exit` expression makes the code untestable and often causes incompatibilities with other libraries. Thus, unless you are absolutely sure it is required here, we recommend to refactor your code to avoid its usage. Loading history...
82			}
83
84			if ( $this->hasOption( 'page-time' ) ) {
85			$pageTimestamp = wfTimestamp( TS_MW, strtotime( $this->getOption( 'page-time' ) ) );
86			$id = $this->getRevIdForTime( $title, $pageTimestamp );
			0 ignored issues – show Security Bug introduced 2016-02-23 18:13 UTC by Report Bug Copy Issue Report It seems like `$pageTimestamp` defined by `wfTimestamp(TS_MW, strto...etOption('page-time')))` on line `85` can also be of type `false`; however, `BenchmarkParse::getRevIdForTime()` does only seem to accept `string`, did you maybe forget to handle an error condition? This check looks for type mismatches where the missing type is `false`. This is usually indicative of an error condtion. Consider the follow example <?php function getDate($date) { if ($date !== null) { return new DateTime($date); } return false; } This function either returns a new `DateTime` object or false, if there was an error. This is a typical pattern in PHP programming to show that an error has occurred without raising an exception. The calling code should check for this returned `false` before passing on the value to another function or method that may not be able to handle a `false`. Loading history...
87			if ( !$id ) {
88			$this->error( "The page did not exist at that time" );
89			exit( 1 );
			0 ignored issues – show Coding Style Compatibility introduced 2016-01-16 18:00 UTC by Report Bug Copy Issue Report The method `execute()` contains an exit expression. An exit expression should only be used in rare cases. For example, if you write a short command line script. In most cases however, using an `exit` expression makes the code untestable and often causes incompatibilities with other libraries. Thus, unless you are absolutely sure it is required here, we recommend to refactor your code to avoid its usage. Loading history...
90			}
91
92			$revision = Revision::newFromId( $id );
93			} else {
94			$revision = Revision::newFromTitle( $title );
95			}
96
97			if ( !$revision ) {
98			$this->error( "Unable to load revision, incorrect title?" );
99			exit( 1 );
			0 ignored issues – show Coding Style Compatibility introduced 2016-01-16 18:00 UTC by Report Bug Copy Issue Report The method `execute()` contains an exit expression. An exit expression should only be used in rare cases. For example, if you write a short command line script. In most cases however, using an `exit` expression makes the code untestable and often causes incompatibilities with other libraries. Thus, unless you are absolutely sure it is required here, we recommend to refactor your code to avoid its usage. Loading history...
100			}
101
102			$warmup = $this->getOption( 'warmup', 1 );
103			for ( $i = 0; $i < $warmup; $i++ ) {
104			$this->runParser( $revision );
105			}
106
107			$loops = $this->getOption( 'loops', 1 );
108			if ( $loops < 1 ) {
109			$this->error( 'Invalid number of loops specified', true );
110			}
111			$startUsage = getrusage();
112			$startTime = microtime( true );
113			for ( $i = 0; $i < $loops; $i++ ) {
114			$this->runParser( $revision );
115			}
116			$endUsage = getrusage();
117			$endTime = microtime( true );
118
119			printf( "CPU time = %.3f s, wall clock time = %.3f s\n",
120			// CPU time
121			( $endUsage['ru_utime.tv_sec'] + $endUsage['ru_utime.tv_usec'] * 1e-6
122			- $startUsage['ru_utime.tv_sec'] - $startUsage['ru_utime.tv_usec'] * 1e-6 ) / $loops,
123			// Wall clock time
124			( $endTime - $startTime ) / $loops
125			);
126			}
127
128			/**
129			* Fetch the ID of the revision of a Title that occurred
130			*
131			* @param Title $title
132			* @param string $timestamp
133			* @return bool\|string Revision ID, or false if not found or error
134			*/
135			function getRevIdForTime( Title $title, $timestamp ) {
136			$dbr = $this->getDB( DB_REPLICA );
137
138			$id = $dbr->selectField(
139			[ 'revision', 'page' ],
140			'rev_id',
141			[
142			'page_namespace' => $title->getNamespace(),
143			'page_title' => $title->getDBkey(),
144			'rev_timestamp <= ' . $dbr->addQuotes( $timestamp )
145			],
146			__METHOD__,
147			[ 'ORDER BY' => 'rev_timestamp DESC', 'LIMIT' => 1 ],
148			[ 'revision' => [ 'INNER JOIN', 'rev_page=page_id' ] ]
149			);
150
151			return $id;
152			}
153
154			/**
155			* Parse the text from a given Revision
156			*
157			* @param Revision $revision
158			*/
159			function runParser( Revision $revision ) {
160			$content = $revision->getContent();
161			$content->getParserOutput( $revision->getTitle(), $revision->getId() );
			0 ignored issues – show Bug introduced 2016-01-16 18:00 UTC by Report Bug Copy Issue Report It seems like `$revision->getTitle()` can be `null`; however, `getParserOutput()` does not accept `null`, maybe add an additional type check? Unless you are absolutely sure that the expression can never be null because of other conditions, we strongly recommend to add an additional type check to your code: /** @return stdClass\|null */ function mayReturnNull() { } function doesNotAcceptNull(stdClass $x) { } // With potential error. function withoutCheck() { $x = mayReturnNull(); doesNotAcceptNull($x); // Potential error here. } // Safe - Alternative 1 function withCheck1() { $x = mayReturnNull(); if ( ! $x instanceof stdClass) { throw new \LogicException('$x must be defined.'); } doesNotAcceptNull($x); } // Safe - Alternative 2 function withCheck2() { $x = mayReturnNull(); if ($x instanceof stdClass) { doesNotAcceptNull($x); } } Loading history...
162			if ( $this->clearLinkCache ) {
163			$this->linkCache->clear();
164			}
165			}
166
167			/**
168			* Hook into the parser's revision ID fetcher. Make sure that the parser only
169			* uses revisions around the specified timestamp.
170			*
171			* @param Parser $parser
172			* @param Title $title
173			* @param bool &$skip
174			* @param string\|bool &$id
175			* @return bool
176			*/
177			function onFetchTemplate( Parser $parser, Title $title, &$skip, &$id ) {
178			$pdbk = $title->getPrefixedDBkey();
179			if ( !isset( $this->idCache[$pdbk] ) ) {
180			$proposedId = $this->getRevIdForTime( $title, $this->templateTimestamp );
181			$this->idCache[$pdbk] = $proposedId;
182			}
183			if ( $this->idCache[$pdbk] !== false ) {
184			$id = $this->idCache[$pdbk];
185			}
186
187			return true;
188			}
189			}
190
191			$maintClass = 'BenchmarkParse';
192			require RUN_MAINTENANCE_IF_MAIN;
193

wikimedia / mediawiki

BenchmarkParse::getRevIdForTime() A last analyzed 2016-11-13 17:42 UTC

Complexity

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Duplication

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BenchmarkParse::getRevIdForTime() A
last analyzed 2016-11-13 17:42 UTC