Cache - Code Metrics - Inspection of "Add listDirectory" - KnpLabs/Gaufrette - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#425)

unknown

created 2016-08-30 11:40 UTC

Cache A

↳ Parent: Project

Complexity

Total Complexity

Size/Duplication

Total Lines	235
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	2

Importance

Changes	6
Bugs	2	Features	1

Metric	Value
wmc	32
c	6
b	2
f	1
lcom	1
cbo	2
dl	0
loc	235
rs	9.6

16 Methods

Rating	Name	Size	Complexity
A	rename()	4	2
A	write()	16	3
A	exists()	8	2
A	__construct()	11	2
A	getTtl()	4	1
A	setTtl()	4	1
A	read()	11	2
A	mtime()	4	1
A	keys()	13	2
A	delete()	4	2
A	isDirectory()	4	1
A	listDirectory()	4	1
A	setMetadata()	10	3
A	getMetadata()	8	2
A	needsReload()	19	4
A	needsRebuild()	13	3

<?php

namespace Gaufrette\Adapter;

use Gaufrette\File;
use Gaufrette\Adapter;
use Gaufrette\Adapter\InMemory as InMemoryAdapter;

/**
 * Cache adapter.
 *
 * @author  Antoine Hérault <[email protected]>
 */
class Cache implements Adapter,

                       MetadataSupporter

{
    /**
     * @var Adapter
     */
    protected $source;

    /**
     * @var Adapter
     */
    protected $cache;

    /**
     * @var int
     */
    protected $ttl;

    /**
     * @var Adapter
     */
    protected $serializeCache;

    /**
     * @param Adapter $source         The source adapter that must be cached
     * @param Adapter $cache          The adapter used to cache the source
     * @param int     $ttl            Time to live of a cached file
     * @param Adapter $serializeCache The adapter used to cache serializations
     */
    public function __construct(Adapter $source, Adapter $cache, $ttl = 0, Adapter $serializeCache = null)
    {
        $this->source = $source;
        $this->cache = $cache;
        $this->ttl = $ttl;

        if (!$serializeCache) {
            $serializeCache = new InMemoryAdapter();
        }
        $this->serializeCache = $serializeCache;
    }

    /**
     * Returns the time to live of the cache.
     *
     * @return int $ttl
     */
    public function getTtl()
    {
        return $this->ttl;
    }

    /**
     * Defines the time to live of the cache.
     *
     * @param int $ttl
     */
    public function setTtl($ttl)
    {
        $this->ttl = $ttl;
    }

    /**
     * {@inheritdoc}
     */
    public function read($key)
    {
        if ($this->needsReload($key)) {
            $contents = $this->source->read($key);
            $this->cache->write($key, $contents);
/**
 * @return array|string
 */
function returnsDifferentValues($x) {
    if ($x) {
        return 'foo';
    }

    return array();
}

$x = returnsDifferentValues($y);
if (is_array($x)) {
    // $x is an array.
}
        } else {
            $contents = $this->cache->read($key);
        }

        return $contents;
    }

    /**
     * {@inheritdoc}
     */
    public function rename($key, $new)
    {
        return $this->source->rename($key, $new) && $this->cache->rename($key, $new);
    }

    /**
     * {@inheritdoc}
     */
    public function write($key, $content, array $metadata = null)
    {
        $bytesSource = $this->source->write($key, $content);

        if (false === $bytesSource) {
            return false;
        }

        $bytesCache = $this->cache->write($key, $content);

        if ($bytesSource !== $bytesCache) {
            return false;
        }

        return $bytesSource;
    }

    /**
     * {@inheritdoc}
     */
    public function exists($key)
    {
        if ($this->needsReload($key)) {
            return $this->source->exists($key);
        }

        return $this->cache->exists($key);
    }

    /**
     * {@inheritdoc}
     */
    public function mtime($key)
    {
        return $this->source->mtime($key);
    }

    /**
     * {@inheritdoc}
     */
    public function keys()
    {
        $cacheFile = 'keys.cache';
        if ($this->needsRebuild($cacheFile)) {
            $keys = $this->source->keys();
            sort($keys);
            $this->serializeCache->write($cacheFile, serialize($keys));
        } else {
            $keys = unserialize($this->serializeCache->read($cacheFile));
        }

        return $keys;
    }

    /**
     * {@inheritdoc}
     */
    public function delete($key)
    {
        return $this->source->delete($key) && $this->cache->delete($key);
    }

    /**
     * {@inheritdoc}
     */
    public function isDirectory($key)
    {
        return $this->source->isDirectory($key);
    }

    /**
     * {@inheritDoc}
     */
    public function listDirectory($key)
    {
        return $this->source->listDirectory($key);

    }

    /**
     * {@inheritdoc}
     */
    public function setMetadata($key, $metadata)
    {
        if ($this->source instanceof MetadataSupporter) {
            $this->source->setMetadata($key, $metadata);
        }

        if ($this->cache instanceof MetadataSupporter) {
            $this->cache->setMetadata($key, $metadata);
        }
    }

    /**
     * {@inheritdoc}
     */
    public function getMetadata($key)
    {
        if ($this->source instanceof MetadataSupporter) {
            return $this->source->getMetadata($key);
        }

        return false;
class Author {
    private $name;

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

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
    }

    /**
     * Indicates whether the cache for the specified key needs to be reloaded.
     *
     * @param string $key
     */
    public function needsReload($key)
    {
        $needsReload = true;

        if ($this->cache->exists($key)) {
            try {
                $dateCache = $this->cache->mtime($key);
                $needsReload = false;

                if (time() - $this->ttl >= $dateCache) {
                    $dateSource = $this->source->mtime($key);
                    $needsReload = $dateCache < $dateSource;
                }
            } catch (\RuntimeException $e) {

            }
        }

        return $needsReload;
    }

    /**
     * Indicates whether the serialized cache file needs to be rebuild.
     *
     * @param string $cacheFile
     */
    public function needsRebuild($cacheFile)
    {
        $needsRebuild = true;

        if ($this->serializeCache->exists($cacheFile)) {
            try {
                $needsRebuild = time() - $this->ttl >= $this->serializeCache->mtime($cacheFile);
            } catch (\RuntimeException $e) {

            }
        }

        return $needsRebuild;
    }
}


1			<?php
2
3			namespace Gaufrette\Adapter;
4
5			use Gaufrette\File;
6			use Gaufrette\Adapter;
7			use Gaufrette\Adapter\InMemory as InMemoryAdapter;
8
9			/**
10			* Cache adapter.
11			*
12			* @author Antoine Hérault <[email protected]>
13			*/
14			class Cache implements Adapter,
			0 ignored issues – show Coding Style introduced 2016-03-05 14:38 UTC by Report Bug Copy Issue Report The first item in a multi-line implements list must be on the line following the implements keyword Loading history...
15			MetadataSupporter
			0 ignored issues – show Coding Style introduced 2016-03-05 14:38 UTC by Report Bug Copy Issue Report Expected 4 spaces before interface name; 23 found Loading history...
16			{
17			/**
18			* @var Adapter
19			*/
20			protected $source;
21
22			/**
23			* @var Adapter
24			*/
25			protected $cache;
26
27			/**
28			* @var int
29			*/
30			protected $ttl;
31
32			/**
33			* @var Adapter
34			*/
35			protected $serializeCache;
36
37			/**
38			* @param Adapter $source The source adapter that must be cached
39			* @param Adapter $cache The adapter used to cache the source
40			* @param int $ttl Time to live of a cached file
41			* @param Adapter $serializeCache The adapter used to cache serializations
42			*/
43			public function __construct(Adapter $source, Adapter $cache, $ttl = 0, Adapter $serializeCache = null)
44			{
45			$this->source = $source;
46			$this->cache = $cache;
47			$this->ttl = $ttl;
48
49			if (!$serializeCache) {
50			$serializeCache = new InMemoryAdapter();
51			}
52			$this->serializeCache = $serializeCache;
53			}
54
55			/**
56			* Returns the time to live of the cache.
57			*
58			* @return int $ttl
59			*/
60			public function getTtl()
61			{
62			return $this->ttl;
63			}
64
65			/**
66			* Defines the time to live of the cache.
67			*
68			* @param int $ttl
69			*/
70			public function setTtl($ttl)
71			{
72			$this->ttl = $ttl;
73			}
74
75			/**
76			* {@inheritdoc}
77			*/
78			public function read($key)
79			{
80			if ($this->needsReload($key)) {
81			$contents = $this->source->read($key);
82			$this->cache->write($key, $contents);
			0 ignored issues – show Bug introduced 2016-03-05 14:38 UTC by Report Bug Copy Issue Report It seems like `$contents` defined by `$this->source->read($key)` on line `81` can also be of type `boolean`; however, `Gaufrette\Adapter::write()` does only seem to accept `string`, maybe add an additional type check? If a method or function can return multiple different values and unless you are sure that you only can receive a single value in this context, we recommend to add an additional type check: /** * @return array\|string */ function returnsDifferentValues($x) { if ($x) { return 'foo'; } return array(); } $x = returnsDifferentValues($y); if (is_array($x)) { // $x is an array. } If this a common case that PHP Analyzer should handle natively, please let us know by opening an issue. Loading history...
83			} else {
84			$contents = $this->cache->read($key);
85			}
86
87			return $contents;
88			}
89
90			/**
91			* {@inheritdoc}
92			*/
93			public function rename($key, $new)
94			{
95			return $this->source->rename($key, $new) && $this->cache->rename($key, $new);
96			}
97
98			/**
99			* {@inheritdoc}
100			*/
101			public function write($key, $content, array $metadata = null)
102			{
103			$bytesSource = $this->source->write($key, $content);
104
105			if (false === $bytesSource) {
106			return false;
107			}
108
109			$bytesCache = $this->cache->write($key, $content);
110
111			if ($bytesSource !== $bytesCache) {
112			return false;
113			}
114
115			return $bytesSource;
116			}
117
118			/**
119			* {@inheritdoc}
120			*/
121			public function exists($key)
122			{
123			if ($this->needsReload($key)) {
124			return $this->source->exists($key);
125			}
126
127			return $this->cache->exists($key);
128			}
129
130			/**
131			* {@inheritdoc}
132			*/
133			public function mtime($key)
134			{
135			return $this->source->mtime($key);
136			}
137
138			/**
139			* {@inheritdoc}
140			*/
141			public function keys()
142			{
143			$cacheFile = 'keys.cache';
144			if ($this->needsRebuild($cacheFile)) {
145			$keys = $this->source->keys();
146			sort($keys);
147			$this->serializeCache->write($cacheFile, serialize($keys));
148			} else {
149			$keys = unserialize($this->serializeCache->read($cacheFile));
150			}
151
152			return $keys;
153			}
154
155			/**
156			* {@inheritdoc}
157			*/
158			public function delete($key)
159			{
160			return $this->source->delete($key) && $this->cache->delete($key);
161			}
162
163			/**
164			* {@inheritdoc}
165			*/
166			public function isDirectory($key)
167			{
168			return $this->source->isDirectory($key);
169			}
170
171			/**
172			* {@inheritDoc}
173			*/
174			public function listDirectory($key)
175			{
176			return $this->source->listDirectory($key);
			0 ignored issues – show Bug introduced 2016-08-30 11:43 UTC by Report Bug Copy Issue Report The method `listDirectory()` does not exist on `Gaufrette\Adapter`. Did you maybe mean `isDirectory()`? This check marks calls to methods that do not seem to exist on an object. This is most likely the result of a method being renamed without all references to it being renamed likewise. Loading history...
177			}
178
179			/**
180			* {@inheritdoc}
181			*/
182			public function setMetadata($key, $metadata)
183			{
184			if ($this->source instanceof MetadataSupporter) {
185			$this->source->setMetadata($key, $metadata);
186			}
187
188			if ($this->cache instanceof MetadataSupporter) {
189			$this->cache->setMetadata($key, $metadata);
190			}
191			}
192
193			/**
194			* {@inheritdoc}
195			*/
196			public function getMetadata($key)
197			{
198			if ($this->source instanceof MetadataSupporter) {
199			return $this->source->getMetadata($key);
200			}
201
202			return false;
			0 ignored issues – show Bug Best Practice introduced 2016-03-05 14:38 UTC by Report Bug Copy Issue Report The return type of `return false;` (`false`) is incompatible with the return type declared by the interface `Gaufrette\Adapter\MetadataSupporter::getMetadata` of type `array`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
203			}
204
205			/**
206			* Indicates whether the cache for the specified key needs to be reloaded.
207			*
208			* @param string $key
209			*/
210			public function needsReload($key)
211			{
212			$needsReload = true;
213
214			if ($this->cache->exists($key)) {
215			try {
216			$dateCache = $this->cache->mtime($key);
217			$needsReload = false;
218
219			if (time() - $this->ttl >= $dateCache) {
220			$dateSource = $this->source->mtime($key);
221			$needsReload = $dateCache < $dateSource;
222			}
223			} catch (\RuntimeException $e) {
			0 ignored issues – show Coding Style Comprehensibility introduced 2016-08-30 11:43 UTC by Report Bug Copy Issue Report Consider adding a comment why this CATCH block is empty. Loading history...
224			}
225			}
226
227			return $needsReload;
228			}
229
230			/**
231			* Indicates whether the serialized cache file needs to be rebuild.
232			*
233			* @param string $cacheFile
234			*/
235			public function needsRebuild($cacheFile)
236			{
237			$needsRebuild = true;
238
239			if ($this->serializeCache->exists($cacheFile)) {
240			try {
241			$needsRebuild = time() - $this->ttl >= $this->serializeCache->mtime($cacheFile);
242			} catch (\RuntimeException $e) {
			0 ignored issues – show Coding Style Comprehensibility introduced 2016-03-05 14:38 UTC by Report Bug Copy Issue Report Consider adding a comment why this CATCH block is empty. Loading history...
243			}
244			}
245
246			return $needsRebuild;
247			}
248			}
249

KnpLabs / Gaufrette

Pull Request — master (#425)

Cache A

Complexity

Size/Duplication

Coupling/Cohesion

Importance

16 Methods

Duplication Side-by-Side

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