ElggMemcache::delete() - Code Metrics - gctools-outilsgc/gcconnex - Measure and Improve Code Quality continuously with Scrutinizer

ElggMemcache::delete() A
last analyzed 2021-05-27 17:40 UTC

↳ Parent: ElggMemcache

Complexity

Conditions	1
Paths	1

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	2

Importance

Changes

Metric	Value
cc	1
nc	1
nop	1
dl	0
loc	5
ccs	0
cts	4
cp	0
crap	2
rs	10
c	0
b	0
f	0

<?php
/**
 * Memcache wrapper class.
 *
 * @package    Elgg.Core
 * @subpackage Memcache
 */
class ElggMemcache extends \ElggSharedMemoryCache {
	/**
	 * Global Elgg configuration
	 * 
	 * @var \stdClass
	 */
	private $CONFIG;

	/**
	 * Minimum version of memcached needed to run
	 *
	 */
	private static $MINSERVERVERSION = '1.1.12';

	/**
	 * Memcache object
	 */
	private $memcache;

	/**
	 * Expiry of saved items (default timeout after a day to prevent anything getting too stale)
	 */
	private $expires = 86400;

	/**
	 * The version of memcache running
	 */
	private $version = 0;

	/**
	 * Connect to memcache.
	 *
	 * @param string $namespace The namespace for this cache to write to -
	 * note, namespaces of the same name are shared!
	 *
	 * @throws ConfigurationException
	 */
	public function __construct($namespace = 'default') {
		global $CONFIG;
		$this->CONFIG = $CONFIG;

		$this->setNamespace($namespace);

		// Do we have memcache?
		if (!class_exists('Memcache')) {
			throw new \ConfigurationException('PHP memcache module not installed, you must install php5-memcache');
		}

		// Create memcache object
		$this->memcache	= new Memcache;

		// Now add servers
		if (!$this->CONFIG->memcache_servers) {
			throw new \ConfigurationException('No memcache servers defined, please populate the $this->CONFIG->memcache_servers variable');
		}

		if (is_callable(array($this->memcache, 'addServer'))) {
			foreach ($this->CONFIG->memcache_servers as $server) {
				if (is_array($server)) {
					$this->memcache->addServer(
						$server[0],
						isset($server[1]) ? $server[1] : 11211,
						isset($server[2]) ? $server[2] : false,
						isset($server[3]) ? $server[3] : 1,
						isset($server[4]) ? $server[4] : 1,
						isset($server[5]) ? $server[5] : 15,
						isset($server[6]) ? $server[6] : true
					);

				} else {
					$this->memcache->addServer($server, 11211);
				}
			}
		} else {
			// don't use _elgg_services()->translator->translate() here because most of the config hasn't been loaded yet
			// and it caches the language, which is hard coded in $this->CONFIG->language as en.
			// overriding it with real values later has no effect because it's already cached.
			_elgg_services()->logger->error("This version of the PHP memcache API doesn't support multiple servers.");

			$server = $this->CONFIG->memcache_servers[0];
			if (is_array($server)) {
				$this->memcache->connect($server[0], $server[1]);
			} else {
				$this->memcache->addServer($server, 11211);
			}
		}

		// Get version
		$this->version = $this->memcache->getVersion();
$answer = 42;

$correct = false;

$correct = (bool) $answer;
		if (version_compare($this->version, \ElggMemcache::$MINSERVERVERSION, '<')) {
			$msg = vsprintf('Memcache needs at least version %s to run, you are running %s',
				array(\ElggMemcache::$MINSERVERVERSION,
				$this->version
			));

			throw new \ConfigurationException($msg);
		}

		// Set some defaults
		if (isset($this->CONFIG->memcache_expires)) {
			$this->expires = $this->CONFIG->memcache_expires;
		}
		
		// make sure memcache is reset
		_elgg_services()->events->registerHandler('cache:flush', 'system', array($this, 'clear'));
	}

	/**
	 * Set the default expiry.
	 *
	 * @param int $expires The lifetime as a unix timestamp or time from now. Defaults forever.
	 *
	 * @return void
	 */
	public function setDefaultExpiry($expires = 0) {
		$this->expires = $expires;
	}

	/**
	 * Combine a key with the namespace.
	 * Memcache can only accept <250 char key. If the given key is too long it is shortened.
	 *
	 * @param string $key The key
	 *
	 * @return string The new key.
	 */
	private function makeMemcacheKey($key) {
		$prefix = $this->getNamespace() . ":";

		if (strlen($prefix . $key) > 250) {
			$key = md5($key);
		}

		return $prefix . $key;
	}

	/**
	 * Saves a name and value to the cache
	 *
	 * @param string  $key     Name
	 * @param string  $data    Value
	 * @param integer $expires Expires (in seconds)
	 *
	 * @return bool
	 */
	public function save($key, $data, $expires = null) {
		$key = $this->makeMemcacheKey($key);

		if ($expires === null) {
			$expires = $this->expires;
		}

		$result = $this->memcache->set($key, $data, null, $expires);
		if ($result === false) {
			_elgg_services()->logger->error("MEMCACHE: SAVE FAIL $key");
		} else {
			_elgg_services()->logger->info("MEMCACHE: SAVE SUCCESS $key");
		}

		return $result;
	}

	/**
	 * Retrieves data.
	 *
	 * @param string $key    Name of data to retrieve
	 * @param int    $offset Offset
	 * @param int    $limit  Limit
	 *
	 * @return mixed
	 */
	public function load($key, $offset = 0, $limit = null) {
		$key = $this->makeMemcacheKey($key);

		$result = $this->memcache->get($key);
		if ($result === false) {
			_elgg_services()->logger->info("MEMCACHE: LOAD MISS $key");
		} else {
			_elgg_services()->logger->info("MEMCACHE: LOAD HIT $key");
		}

		return $result;
	}

	/**
	 * Delete data
	 *
	 * @param string $key Name of data
	 *
	 * @return bool
	 */
	public function delete($key) {
		$key = $this->makeMemcacheKey($key);

		return $this->memcache->delete($key, 0);
	}

	/**
	 * Clears the entire cache
	 *
	 * @return true
	 */
	public function clear() {
		$result = $this->memcache->flush();
		if ($result === false) {
			_elgg_services()->logger->info("MEMCACHE: failed to flush {$this->getNamespace()}");
		} else {
			sleep(1); // needed because http://php.net/manual/en/memcache.flush.php#81420
			
			_elgg_services()->logger->info("MEMCACHE: flushed {$this->getNamespace()}");
		}
		
		return $result;

		// @todo Namespaces as in #532
	}
}


1		<?php
2		/**
3		* Memcache wrapper class.
4		*
5		* @package Elgg.Core
6		* @subpackage Memcache
7		*/
8		class ElggMemcache extends \ElggSharedMemoryCache {
9		/**
10		* Global Elgg configuration
11		*
12		* @var \stdClass
13		*/
14		private $CONFIG;
15
16		/**
17		* Minimum version of memcached needed to run
18		*
19		*/
20		private static $MINSERVERVERSION = '1.1.12';
21
22		/**
23		* Memcache object
24		*/
25		private $memcache;
26
27		/**
28		* Expiry of saved items (default timeout after a day to prevent anything getting too stale)
29		*/
30		private $expires = 86400;
31
32		/**
33		* The version of memcache running
34		*/
35		private $version = 0;
36
37		/**
38		* Connect to memcache.
39		*
40		* @param string $namespace The namespace for this cache to write to -
41		* note, namespaces of the same name are shared!
42		*
43		* @throws ConfigurationException
44		*/
45		public function __construct($namespace = 'default') {
46		global $CONFIG;
47		$this->CONFIG = $CONFIG;
48
49		$this->setNamespace($namespace);
50
51		// Do we have memcache?
52		if (!class_exists('Memcache')) {
53		throw new \ConfigurationException('PHP memcache module not installed, you must install php5-memcache');
54		}
55
56		// Create memcache object
57		$this->memcache = new Memcache;
58
59		// Now add servers
60		if (!$this->CONFIG->memcache_servers) {
61		throw new \ConfigurationException('No memcache servers defined, please populate the $this->CONFIG->memcache_servers variable');
62		}
63
64		if (is_callable(array($this->memcache, 'addServer'))) {
65		foreach ($this->CONFIG->memcache_servers as $server) {
66		if (is_array($server)) {
67		$this->memcache->addServer(
68		$server[0],
69		isset($server[1]) ? $server[1] : 11211,
70		isset($server[2]) ? $server[2] : false,
71		isset($server[3]) ? $server[3] : 1,
72		isset($server[4]) ? $server[4] : 1,
73		isset($server[5]) ? $server[5] : 15,
74		isset($server[6]) ? $server[6] : true
75		);
76
77		} else {
78		$this->memcache->addServer($server, 11211);
79		}
80		}
81		} else {
82		// don't use _elgg_services()->translator->translate() here because most of the config hasn't been loaded yet
83		// and it caches the language, which is hard coded in $this->CONFIG->language as en.
84		// overriding it with real values later has no effect because it's already cached.
85		_elgg_services()->logger->error("This version of the PHP memcache API doesn't support multiple servers.");
86
87		$server = $this->CONFIG->memcache_servers[0];
88		if (is_array($server)) {
89		$this->memcache->connect($server[0], $server[1]);
90		} else {
91		$this->memcache->addServer($server, 11211);
92		}
93		}
94
95		// Get version
96		$this->version = $this->memcache->getVersion();
		0 ignored issues – show Documentation Bug introduced 2017-09-27 16:16 UTC by Report Bug Copy Issue Report The property `$version` was declared of type `integer`, but `$this->memcache->getVersion()` is of type `string`. Maybe add a type cast? This check looks for assignments to scalar types that may be of the wrong type. To ensure the code behaves as expected, it may be a good idea to add an explicit type cast. $answer = 42; $correct = false; $correct = (bool) $answer; Loading history...
97		if (version_compare($this->version, \ElggMemcache::$MINSERVERVERSION, '<')) {
98		$msg = vsprintf('Memcache needs at least version %s to run, you are running %s',
99		array(\ElggMemcache::$MINSERVERVERSION,
100		$this->version
101		));
102
103		throw new \ConfigurationException($msg);
104		}
105
106		// Set some defaults
107		if (isset($this->CONFIG->memcache_expires)) {
108		$this->expires = $this->CONFIG->memcache_expires;
109		}
110
111		// make sure memcache is reset
112		_elgg_services()->events->registerHandler('cache:flush', 'system', array($this, 'clear'));
113		}
114
115		/**
116		* Set the default expiry.
117		*
118		* @param int $expires The lifetime as a unix timestamp or time from now. Defaults forever.
119		*
120		* @return void
121		*/
122		public function setDefaultExpiry($expires = 0) {
123		$this->expires = $expires;
124		}
125
126		/**
127		* Combine a key with the namespace.
128		* Memcache can only accept <250 char key. If the given key is too long it is shortened.
129		*
130		* @param string $key The key
131		*
132		* @return string The new key.
133		*/
134		private function makeMemcacheKey($key) {
135		$prefix = $this->getNamespace() . ":";
136
137		if (strlen($prefix . $key) > 250) {
138		$key = md5($key);
139		}
140
141		return $prefix . $key;
142		}
143
144		/**
145		* Saves a name and value to the cache
146		*
147		* @param string $key Name
148		* @param string $data Value
149		* @param integer $expires Expires (in seconds)
150		*
151		* @return bool
152		*/
153		public function save($key, $data, $expires = null) {
154		$key = $this->makeMemcacheKey($key);
155
156		if ($expires === null) {
157		$expires = $this->expires;
158		}
159
160		$result = $this->memcache->set($key, $data, null, $expires);
161	View Code Duplication	if ($result === false) {
162		_elgg_services()->logger->error("MEMCACHE: SAVE FAIL $key");
163		} else {
164		_elgg_services()->logger->info("MEMCACHE: SAVE SUCCESS $key");
165		}
166
167		return $result;
168		}
169
170		/**
171		* Retrieves data.
172		*
173		* @param string $key Name of data to retrieve
174		* @param int $offset Offset
175		* @param int $limit Limit
176		*
177		* @return mixed
178		*/
179		public function load($key, $offset = 0, $limit = null) {
180		$key = $this->makeMemcacheKey($key);
181
182		$result = $this->memcache->get($key);
183	View Code Duplication	if ($result === false) {
184		_elgg_services()->logger->info("MEMCACHE: LOAD MISS $key");
185		} else {
186		_elgg_services()->logger->info("MEMCACHE: LOAD HIT $key");
187		}
188
189		return $result;
190		}
191
192		/**
193		* Delete data
194		*
195		* @param string $key Name of data
196		*
197		* @return bool
198		*/
199		public function delete($key) {
200		$key = $this->makeMemcacheKey($key);
201
202		return $this->memcache->delete($key, 0);
203		}
204
205		/**
206		* Clears the entire cache
207		*
208		* @return true
209		*/
210		public function clear() {
211		$result = $this->memcache->flush();
212		if ($result === false) {
213		_elgg_services()->logger->info("MEMCACHE: failed to flush {$this->getNamespace()}");
214		} else {
215		sleep(1); // needed because http://php.net/manual/en/memcache.flush.php#81420
216
217		_elgg_services()->logger->info("MEMCACHE: flushed {$this->getNamespace()}");
218		}
219
220		return $result;
221
222		// @todo Namespaces as in #532
223		}
224		}
225

gctools-outilsgc / gcconnex

ElggMemcache::delete() A last analyzed 2021-05-27 17:40 UTC

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ElggMemcache::delete() A
last analyzed 2021-05-27 17:40 UTC