Apc::delete() - Code Metrics - Inspection of "cache fix in pick_all mode" - comodojo/cache - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — 2.0 ( aed067...b26523 )

by Marco

created 2016-08-05 23:26 UTC

Apc::delete() B

↳ Parent: Apc

Complexity

Conditions	5
Paths	6

Size

Total Lines	33
Code Lines	11

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	10
CRAP Score	5.0187

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
c	1
b	0
f	0
dl	0
loc	33
ccs	10
cts	11
cp	0.9091
rs	8.439
cc	5
eloc	11
nc	6
nop	1
crap	5.0187

<?php namespace Comodojo\Cache\Providers;

use \Comodojo\Cache\Providers\AbstractProvider;
use \Psr\Log\LoggerInterface;
use \Comodojo\Exception\CacheException;
use \Exception;

/**
 * Apc/Apcu cache class
 *
 * @package     Comodojo Spare Parts
 * @author      Marco Giovinazzi <[email protected]>
 * @license     MIT
 *
 * LICENSE:
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

class Apc extends AbstractProvider {

    private static $is_apcu = false;

    /**
     * Class constructor
     *
     * @throws \Comodojo\Exception\CacheException
     */
    public function __construct(LoggerInterface $logger = null) {

        parent::__construct($logger);

        if ( self::getApcStatus() === false ) {

            $this->logger->error("Apc extension not available, disabling ApcProvider administratively");

            $this->disable();

        } else {

            // In cli, apcu SHOULD NOT use the request time for cache retrieve/invalidation.
            // This is because in cli the request time is allways the same.
            if ( php_sapi_name() === 'cli' ) {
                ini_set('apc.use_request_time',0);
            }

        }

    }

    /**
     * {@inheritdoc}
     */
    public function set($name, $data, $ttl = null) {

        if ( empty($name) ) throw new CacheException("Name of object cannot be empty");

        if ( is_null($data) ) throw new CacheException("Object content cannot be null");

        // simply return false if cache is disabled
        if ( !$this->isEnabled() ) return false;

        // reset error state, just in case
        $this->resetErrorState();

        try {

            $this->setTtl($ttl);

            $namespace = $this->getNamespaceKey();

            if ( $namespace === false ) $namespace = $this->setNamespaceKey();

            // if namespace is still false, raise an error and exit gracefully
            if ( $namespace === false ) {

                $this->logger->error("Error writing cache (APC), exiting gracefully");

                $this->setErrorState("Error writing cache (APC)");

                return false;

            }

            $shadowName = $namespace."-".md5($name);

            $shadowTtl = $this->ttl;

            if ( self::$is_apcu ) {

                $return = apcu_store($shadowName, $data, $shadowTtl);

            } else {

                $return = apc_store($shadowName, $data, $shadowTtl);

            }

            if ( $return === false ) {

                $this->logger->error("Error writing cache (APC), exiting gracefully");

                $this->setErrorState("Error writing cache (APC)");

            }

        } catch (CacheException $ce) {

            throw $ce;

        }

        return $return;

    }

    /**
     * {@inheritdoc}
     */
    public function get($name) {

        if ( empty($name) ) throw new CacheException("Name of object cannot be empty");

        if ( !$this->isEnabled() ) return null;

        $this->resetErrorState();

        $namespace = $this->getNamespaceKey();

        if ( $namespace === false ) {

            return null;

        }

        $shadowName = $namespace."-".md5($name);

        $success = null;

        if ( self::$is_apcu ) {

            $return = apcu_fetch($shadowName, $success);

        } else {

            $return = apc_fetch($shadowName, $success);

        }

        if ( $return === false ) {

            // This is actually not an error, just KNF flag
            // $this->logger->error("Error reading cache (APC), exiting gracefully");

            // $this->setErrorState();


            return null;

        }

        return $return;

    }

    /**
     * {@inheritdoc}
     */
    public function delete($name = null) {

        if ( !$this->isEnabled() ) return false;

        $this->resetErrorState();

        $namespace = $this->getNamespaceKey();

        if ( $namespace === false ) return true;

        $to_delete = empty($name) ? $this->getNamespace() : $namespace."-".md5($name);

        if ( self::$is_apcu ) {

            $delete = apcu_delete($to_delete);

        } else {

            $delete = apc_delete($to_delete);

        }

        // if ( $delete === false ) {


            // This is actually not an error, just KNF flag
            // $this->logger->error("Error deleting cache (APC), exiting gracefully");

            // $this->setErrorState();


        // }

        return $delete;

    }

    /**
     * {@inheritdoc}
     */
    public function flush() {

        if ( !$this->isEnabled() ) return false;

        $result = self::$is_apcu ? apcu_clear_cache() : apc_clear_cache("user");

        return $result;

    }

    /**
     * {@inheritdoc}
     */
    public function status() {

        if ( !$this->isEnabled() ) return array(

            "provider"  => "apc",
            "enabled"   => false,
            "objects"   => null,
            "options"   => array()
        );

        $stats = self::$is_apcu ? apcu_cache_info(true) : apc_cache_info("user", true);

        if ( isset($stats["num_entries"]) ) {

            $objects = $stats["num_entries"];

        } else {

            //  in some APC versions the "num_entries" field is not available; let's try to calculate it
            $stats_2 = self::$is_apcu ? apcu_cache_info() : apc_cache_info("user");

            $objects = sizeof($stats_2["cache_list"]);

        }

        return array(
            "provider"  => self::$is_apcu ? "apcu" : "apc",
            "enabled"   => $this->isEnabled(),
            "objects"   => intval($objects),
            "options"   => $stats
        );

    }

    /**
     * Set namespace key
     *
     * @return  mixed
     */
    private function setNamespaceKey() {

        $uId = self::getUniqueId();

        $return = self::$is_apcu ? apcu_store($this->getNamespace(), $uId, 0) : apc_store($this->getNamespace(), $uId, 0);

        return $return === false ? false : $uId;

    }

    /**
     * Get namespace key
     *
     * @return  string
     */
    private function getNamespaceKey() {

        return self::$is_apcu ? apcu_fetch($this->getNamespace()) : apc_fetch($this->getNamespace());

    }

    /**
     * Check APC availability
     *
     * @return  bool
     */
    private static function getApcStatus() {

        $apc = extension_loaded('apc');

        $apcu = extension_loaded('apcu');

        if ( $apcu ) self::$is_apcu = true;

        return ( ( $apc || $apcu ) && ini_get('apc.enabled') );

    }

}


1			<?php namespace Comodojo\Cache\Providers;
2
3			use \Comodojo\Cache\Providers\AbstractProvider;
4			use \Psr\Log\LoggerInterface;
5			use \Comodojo\Exception\CacheException;
6			use \Exception;
7
8			/**
9			* Apc/Apcu cache class
10			*
11			* @package Comodojo Spare Parts
12			* @author Marco Giovinazzi <[email protected]>
13			* @license MIT
14			*
15			* LICENSE:
16			*
17			* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18			* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19			* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20			* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21			* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22			* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23			* THE SOFTWARE.
24			*/
25
26			class Apc extends AbstractProvider {
27
28			private static $is_apcu = false;
29
30			/**
31			* Class constructor
32			*
33			* @throws \Comodojo\Exception\CacheException
34			*/
35	18		public function __construct(LoggerInterface $logger = null) {
36
37	18		parent::__construct($logger);
38
39	18		if ( self::getApcStatus() === false ) {
40
41			$this->logger->error("Apc extension not available, disabling ApcProvider administratively");
42
43			$this->disable();
44
45			} else {
46
47			// In cli, apcu SHOULD NOT use the request time for cache retrieve/invalidation.
48			// This is because in cli the request time is allways the same.
49	18		if ( php_sapi_name() === 'cli' ) {
50	18		ini_set('apc.use_request_time',0);
51	18		}
52
53			}
54
55	18		}
56
57			/**
58			* {@inheritdoc}
59			*/
60	32		public function set($name, $data, $ttl = null) {
61
62	32		if ( empty($name) ) throw new CacheException("Name of object cannot be empty");
63
64	32		if ( is_null($data) ) throw new CacheException("Object content cannot be null");
65
66			// simply return false if cache is disabled
67	32		if ( !$this->isEnabled() ) return false;
68
69			// reset error state, just in case
70	32		$this->resetErrorState();
71
72			try {
73
74	32		$this->setTtl($ttl);
75
76	32		$namespace = $this->getNamespaceKey();
77
78	32		if ( $namespace === false ) $namespace = $this->setNamespaceKey();
79
80			// if namespace is still false, raise an error and exit gracefully
81	32		if ( $namespace === false ) {
82
83			$this->logger->error("Error writing cache (APC), exiting gracefully");
84
85			$this->setErrorState("Error writing cache (APC)");
86
87			return false;
88
89			}
90
91	32		$shadowName = $namespace."-".md5($name);
92
93	32		$shadowTtl = $this->ttl;
94
95	32		if ( self::$is_apcu ) {
96
97	32		$return = apcu_store($shadowName, $data, $shadowTtl);
98
99	32		} else {
100
101			$return = apc_store($shadowName, $data, $shadowTtl);
102
103			}
104
105	32		if ( $return === false ) {
106
107			$this->logger->error("Error writing cache (APC), exiting gracefully");
108
109			$this->setErrorState("Error writing cache (APC)");
110
111			}
112
113	32		} catch (CacheException $ce) {
114
115			throw $ce;
116
117			}
118
119	32		return $return;
120
121			}
122
123			/**
124			* {@inheritdoc}
125			*/
126	26		public function get($name) {
127
128	26		if ( empty($name) ) throw new CacheException("Name of object cannot be empty");
129
130	26		if ( !$this->isEnabled() ) return null;
131
132	26		$this->resetErrorState();
133
134	26		$namespace = $this->getNamespaceKey();
135
136	26		if ( $namespace === false ) {
137
138	9		return null;
139
140			}
141
142	21		$shadowName = $namespace."-".md5($name);
143
144	21		$success = null;
145
146	21		if ( self::$is_apcu ) {
147
148	21		$return = apcu_fetch($shadowName, $success);
149
150	21		} else {
151
152			$return = apc_fetch($shadowName, $success);
153
154			}
155
156	21		if ( $return === false ) {
157
158			// This is actually not an error, just KNF flag
159			// $this->logger->error("Error reading cache (APC), exiting gracefully");
			0 ignored issues – show Unused Code Comprehensibility introduced 2016-07-31 16:40 UTC by Report Bug Copy Issue Report `70%` of this comment could be valid code. Did you maybe forget this after debugging? Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it. The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production. This check looks for comments that seem to be mostly valid code and reports them. Loading history...
160			// $this->setErrorState();
			0 ignored issues – show Unused Code Comprehensibility introduced 2016-07-31 16:40 UTC by Report Bug Copy Issue Report `72%` of this comment could be valid code. Did you maybe forget this after debugging? Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it. The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production. This check looks for comments that seem to be mostly valid code and reports them. Loading history...
161
162	7		return null;
163
164			}
165
166	14		return $return;
167
168			}
169
170			/**
171			* {@inheritdoc}
172			*/
173	11		public function delete($name = null) {
174
175	11		if ( !$this->isEnabled() ) return false;
176
177	11		$this->resetErrorState();
178
179	11		$namespace = $this->getNamespaceKey();
180
181	11		if ( $namespace === false ) return true;
182
183	11		$to_delete = empty($name) ? $this->getNamespace() : $namespace."-".md5($name);
184
185	11		if ( self::$is_apcu ) {
186
187	11		$delete = apcu_delete($to_delete);
188
189	11		} else {
190
191			$delete = apc_delete($to_delete);
192
193			}
194
195			// if ( $delete === false ) {
			0 ignored issues – show Unused Code Comprehensibility introduced 2016-07-31 16:40 UTC by Report Bug Copy Issue Report `43%` of this comment could be valid code. Did you maybe forget this after debugging? Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it. The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production. This check looks for comments that seem to be mostly valid code and reports them. Loading history...
196
197			// This is actually not an error, just KNF flag
198			// $this->logger->error("Error deleting cache (APC), exiting gracefully");
			0 ignored issues – show Unused Code Comprehensibility introduced 2016-07-31 16:40 UTC by Report Bug Copy Issue Report `70%` of this comment could be valid code. Did you maybe forget this after debugging? Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it. The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production. This check looks for comments that seem to be mostly valid code and reports them. Loading history...
199			// $this->setErrorState();
			0 ignored issues – show Unused Code Comprehensibility introduced 2016-07-31 16:40 UTC by Report Bug Copy Issue Report `72%` of this comment could be valid code. Did you maybe forget this after debugging? Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it. The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production. This check looks for comments that seem to be mostly valid code and reports them. Loading history...
200
201			// }
202
203	11		return $delete;
204
205			}
206
207			/**
208			* {@inheritdoc}
209			*/
210	7		public function flush() {
211
212	7		if ( !$this->isEnabled() ) return false;
213
214	7		$result = self::$is_apcu ? apcu_clear_cache() : apc_clear_cache("user");
215
216	7		return $result;
217
218			}
219
220			/**
221			* {@inheritdoc}
222			*/
223	7		public function status() {
224
225	7	View Code Duplication	if ( !$this->isEnabled() ) return array(
			0 ignored issues – show Duplication introduced 2016-07-31 16:40 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
226			"provider" => "apc",
227			"enabled" => false,
228			"objects" => null,
229			"options" => array()
230			);
231
232	7		$stats = self::$is_apcu ? apcu_cache_info(true) : apc_cache_info("user", true);
233
234	7		if ( isset($stats["num_entries"]) ) {
235
236	7		$objects = $stats["num_entries"];
237
238	7		} else {
239
240			// in some APC versions the "num_entries" field is not available; let's try to calculate it
241			$stats_2 = self::$is_apcu ? apcu_cache_info() : apc_cache_info("user");
242
243			$objects = sizeof($stats_2["cache_list"]);
244
245			}
246
247			return array(
248	7		"provider" => self::$is_apcu ? "apcu" : "apc",
249	7		"enabled" => $this->isEnabled(),
250	7		"objects" => intval($objects),
251			"options" => $stats
252	7		);
253
254			}
255
256			/**
257			* Set namespace key
258			*
259			* @return mixed
260			*/
261	14		private function setNamespaceKey() {
262
263	14		$uId = self::getUniqueId();
264
265	14		$return = self::$is_apcu ? apcu_store($this->getNamespace(), $uId, 0) : apc_store($this->getNamespace(), $uId, 0);
266
267	14		return $return === false ? false : $uId;
268
269			}
270
271			/**
272			* Get namespace key
273			*
274			* @return string
275			*/
276	48		private function getNamespaceKey() {
277
278	48		return self::$is_apcu ? apcu_fetch($this->getNamespace()) : apc_fetch($this->getNamespace());
279
280			}
281
282			/**
283			* Check APC availability
284			*
285			* @return bool
286			*/
287	18		private static function getApcStatus() {
288
289	18		$apc = extension_loaded('apc');
290
291	18		$apcu = extension_loaded('apcu');
292
293	18		if ( $apcu ) self::$is_apcu = true;
294
295	18		return ( ( $apc \|\| $apcu ) && ini_get('apc.enabled') );
296
297			}
298
299			}
300

comodojo / cache

Push — 2.0 ( aed067...b26523 )

Apc::delete() B

Complexity

Size

Duplication

Code Coverage

Importance

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