Profiler::getTargets() - Code Metrics - Inspection of "Fix static analysis tests" - yiisoft/profiler - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#42)

by Sergei

created 2022-01-11 18:51 UTC

Profiler::getTargets() A

↳ Parent: Profiler

Complexity

Conditions	1
Paths	1

Size

Total Lines	3
Code Lines	1

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	2
CRAP Score	1

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	1
eloc	1
c	1
b	0
f	0
nc	1
nop	0
dl	0
loc	3
ccs	2
cts	2
cp	1
crap	1
rs	10

<?php

declare(strict_types=1);

namespace Yiisoft\Profiler;

use InvalidArgumentException;
use Psr\Log\LoggerInterface;
use Psr\Log\LogLevel;
use RuntimeException;
use Yiisoft\Profiler\Target\TargetInterface;

use function array_key_exists;
use function get_class;
use function gettype;
use function is_float;
use function is_int;
use function is_object;
use function is_string;

/**
 * Profiler provides profiling support. It stores profiling messages in the memory and sends them to different targets
 * according to {@see Profiler::$targets}.
 */
final class Profiler implements ProfilerInterface
{
    /**
     * @var bool Whether to profiler is enabled. Defaults to true.
     * You may use this field to disable writing of the profiling messages and thus save the memory usage.
     */
    private bool $enabled = true;

    /**
     * @var Message[] Complete profiling messages.
     *
     * @see TargetInterface::collect()
     */
    private array $messages = [];

    /**
     * @var LoggerInterface Logger to be used for message export.
     */
    private LoggerInterface $logger;

    /**
     * @var array Pending profiling messages, e.g. the ones which have begun but not ended yet.
     *
     * @psalm-var array<string,array<string,list<Message>>>
     */
    private array $pendingMessages = [];

    /**
     * @var int Current profiling messages nested level.
     */
    private int $nestedLevel = 0;

    /**
     * @var TargetInterface[] Profiling targets. Each array element represents
     * a single {@see TargetInterface} instance.
     */
    private array $targets = [];

    /**
     * Initializes the profiler by registering {@see flush()} as a shutdown function.
     *
     * @param LoggerInterface $logger Logger to use.
     * @param array $targets Profiling targets to use.
     */
    public function __construct(LoggerInterface $logger, array $targets = [])
    {
        $this->logger = $logger;
        $this->setTargets($targets);
        register_shutdown_function([$this, 'flush']);
    }

    /**
     * Enable or disable profiler.
     *
     * @return $this
     */
    public function enable(bool $value = true): self
    {
        $new = clone $this;
        $new->enabled = $value;
        return $new;
    }

    /**
     * @return bool If profiler is enabled.
     *
     * {@see enable}
     */
    public function isEnabled(): bool
    {
        return $this->enabled;
    }

    /**
     * Returns profiler messages.
     *
     * @return Message[] The profiler messages.
     */
    public function getMessages(): array
    {
        return $this->messages;
    }

    /**
     * @return TargetInterface[] Profiling targets. Each array element represents
     * a single {@see TargetInterface} profiling target instance.
     */
    public function getTargets(): array
    {
        return $this->targets;
    }

    /**
     * @param array $targets Profiling targets. Each array element represents
     * a single {@see TargetInterface} instance.
     */
    private function setTargets(array $targets): void
    {
        foreach ($targets as $name => $target) {
            if (!($target instanceof TargetInterface)) {
                throw new InvalidArgumentException(
                    sprintf(
                        'Target "%s" should be an instance of %s, "%s" given.',
                        $name,
                        TargetInterface::class,
                        $this->getDebugType($target)
                    )
                );
            }
        }
        /** @var TargetInterface[] $targets */

        $this->targets = $targets;
    }

    public function begin(string $token, array $context = []): void
    {
        if (!$this->enabled) {
            return;
        }

        $category = $this->getCategoryFromContext($context);

        $context = array_merge(
            $context,
            [
                'token' => $token,
                'category' => $category,
                'nestedLevel' => $this->nestedLevel,
                'time' => microtime(true),
                'beginTime' => microtime(true),
                'beginMemory' => memory_get_usage(),
            ]
        );

        $message = new Message($category, $token, $context);

        $this->pendingMessages[$category][$token][] = $message;
        $this->nestedLevel++;
    }

    public function end(string $token, array $context = []): void
    {
        if (!$this->enabled) {
            return;
        }

        $category = $this->getCategoryFromContext($context);

        if (empty($this->pendingMessages[$category][$token])) {
            throw new RuntimeException(
                sprintf(
                    'Unexpected %s::end() call for category "%s" token "%s". A matching begin() was not found.',
                    self::class,
                    $category,
                    $token
                )
            );
        }

        $message = array_pop($this->pendingMessages[$category][$token]);
        /** @psalm-suppress DocblockTypeContradiction See {@link https://github.com/vimeo/psalm/issues/7376} */
        if (empty($this->pendingMessages[$category][$token])) {
            unset($this->pendingMessages[$category][$token]);

            if (empty($this->pendingMessages[$category])) {
                unset($this->pendingMessages[$category]);
            }
        }

        if (array_key_exists('beginTime', $context)) {
            throw new InvalidArgumentException('Forbidden to override "beginTime" in context.');
        }

        if (array_key_exists('beginMemory', $context)) {
            throw new InvalidArgumentException('Forbidden to override "beginMemory" in context.');
        }

        $context = array_merge(
            $message->context(),
            $context,
            [
                'endTime' => microtime(true),
                'endMemory' => memory_get_usage(),
            ]
        );
        /**
         * @psalm-var array&array{
         *       beginTime: float,
         *       endTime: float,
         *       beginMemory: int,
         *       endMemory: int,
         *     } $context
         */

        $context['duration'] = $context['endTime'] - $context['beginTime'];
        $context['memoryDiff'] = $context['endMemory'] - $context['beginMemory'];

        $this->messages[] = new Message($category, $message->token(), $context);
        $this->nestedLevel--;
    }

    public function findMessages(string $token): array
    {
        $messages = $this->messages;
        return array_filter($messages, static function (Message $message) use ($token) {
            return $message->token() === $token;
        });
    }

    public function flush(): void
    {
        foreach ($this->pendingMessages as $category => $categoryMessages) {
            $this->logCategoryMessages($category, $categoryMessages);
        }

        $this->pendingMessages = [];
        $this->nestedLevel = 0;

        if (empty($this->messages)) {
            return;
        }

        $messages = $this->messages;

        // New messages could appear while the existing ones are being handled by targets.
        $this->messages = [];

        $this->dispatch($messages);
    }

    /**
     * Dispatches the profiling messages to targets.
     *
     * @param Message[] $messages The profiling messages.
     */
    private function dispatch(array $messages): void
    {
        foreach ($this->targets as $target) {
            $target->collect($messages);
        }
    }

    /**
     * @param string $category
     * @param array $categoryMessages
     *
     * @psalm-param array<string,list<Message>> $categoryMessages
     */
    private function logCategoryMessages(string $category, array $categoryMessages): void
    {
        foreach ($categoryMessages as $token => $messages) {
            if (!empty($messages)) {
                $this->logger->log(
                    LogLevel::WARNING,
                    sprintf(
                        'Unclosed profiling entry detected: category "%s" token "%s" %s',
                        $category,
                        $token,
                        __METHOD__
                    )
                );
            }
        }
    }

    private function getCategoryFromContext(array $context): string
    {
        if (!array_key_exists('category', $context)) {
            return 'application';
        }

        $category = $context['category'];
        if (!is_string($category)) {
            throw new InvalidArgumentException(
                sprintf(
                    'Category should be a string, "%s" given.',
                    $this->getDebugType($category)
                )
            );
        }

        return $category;
    }

    /**
     * @param mixed $variable
     */
    private function getDebugType($variable): string
    {
        return is_object($variable) ? get_class($variable) : gettype($variable);
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace Yiisoft\Profiler;
6
7		use InvalidArgumentException;
8		use Psr\Log\LoggerInterface;
9		use Psr\Log\LogLevel;
10		use RuntimeException;
11		use Yiisoft\Profiler\Target\TargetInterface;
12
13		use function array_key_exists;
14		use function get_class;
15		use function gettype;
16		use function is_float;
17		use function is_int;
18		use function is_object;
19		use function is_string;
20
21		/**
22		* Profiler provides profiling support. It stores profiling messages in the memory and sends them to different targets
23		* according to {@see Profiler::$targets}.
24		*/
25		final class Profiler implements ProfilerInterface
26		{
27		/**
28		* @var bool Whether to profiler is enabled. Defaults to true.
29		* You may use this field to disable writing of the profiling messages and thus save the memory usage.
30		*/
31		private bool $enabled = true;
32
33		/**
34		* @var Message[] Complete profiling messages.
35		*
36		* @see TargetInterface::collect()
37		*/
38		private array $messages = [];
39
40		/**
41		* @var LoggerInterface Logger to be used for message export.
42		*/
43		private LoggerInterface $logger;
44
45		/**
46		* @var array Pending profiling messages, e.g. the ones which have begun but not ended yet.
47		*
48		* @psalm-var array<string,array<string,list<Message>>>
49		*/
50		private array $pendingMessages = [];
51
52		/**
53		* @var int Current profiling messages nested level.
54		*/
55		private int $nestedLevel = 0;
56
57		/**
58		* @var TargetInterface[] Profiling targets. Each array element represents
59		* a single {@see TargetInterface} instance.
60		*/
61		private array $targets = [];
62
63		/**
64		* Initializes the profiler by registering {@see flush()} as a shutdown function.
65		*
66		* @param LoggerInterface $logger Logger to use.
67		* @param array $targets Profiling targets to use.
68		*/
69	14	public function __construct(LoggerInterface $logger, array $targets = [])
70		{
71	14	$this->logger = $logger;
72	14	$this->setTargets($targets);
73	12	register_shutdown_function([$this, 'flush']);
74	12	}
75
76		/**
77		* Enable or disable profiler.
78		*
79		* @return $this
80		*/
81	1	public function enable(bool $value = true): self
82		{
83	1	$new = clone $this;
84	1	$new->enabled = $value;
85	1	return $new;
86		}
87
88		/**
89		* @return bool If profiler is enabled.
90		*
91		* {@see enable}
92		*/
93	1	public function isEnabled(): bool
94		{
95	1	return $this->enabled;
96		}
97
98		/**
99		* Returns profiler messages.
100		*
101		* @return Message[] The profiler messages.
102		*/
103	6	public function getMessages(): array
104		{
105	6	return $this->messages;
106		}
107
108		/**
109		* @return TargetInterface[] Profiling targets. Each array element represents
110		* a single {@see TargetInterface} profiling target instance.
111		*/
112	1	public function getTargets(): array
113		{
114	1	return $this->targets;
115		}
116
117		/**
118		* @param array $targets Profiling targets. Each array element represents
119		* a single {@see TargetInterface} instance.
120		*/
121	15	private function setTargets(array $targets): void
122		{
123	15	foreach ($targets as $name => $target) {
124	4	if (!($target instanceof TargetInterface)) {
125	2	throw new InvalidArgumentException(
126	2	sprintf(
127	2	'Target "%s" should be an instance of %s, "%s" given.',
128		$name,
129	2	TargetInterface::class,
130	2	$this->getDebugType($target)
131		)
132		);
133		}
134		}
135		/** @var TargetInterface[] $targets */
136
137	13	$this->targets = $targets;
138	13	}
139
140	9	public function begin(string $token, array $context = []): void
141		{
142	9	if (!$this->enabled) {
143	1	return;
144		}
145
146	9	$category = $this->getCategoryFromContext($context);
147
148	9	$context = array_merge(
149	9	$context,
150		[
151	9	'token' => $token,
152	9	'category' => $category,
153	9	'nestedLevel' => $this->nestedLevel,
154	9	'time' => microtime(true),
155	9	'beginTime' => microtime(true),
156	9	'beginMemory' => memory_get_usage(),
157		]
158		);
159
160	9	$message = new Message($category, $token, $context);
161
162	9	$this->pendingMessages[$category][$token][] = $message;
163	9	$this->nestedLevel++;
164	9	}
165
166	10	public function end(string $token, array $context = []): void
167		{
168	10	if (!$this->enabled) {
169	1	return;
170		}
171
172	10	$category = $this->getCategoryFromContext($context);
173
174	9	if (empty($this->pendingMessages[$category][$token])) {
175	1	throw new RuntimeException(
176	1	sprintf(
177	1	'Unexpected %s::end() call for category "%s" token "%s". A matching begin() was not found.',
178	1	self::class,
179		$category,
180		$token
181		)
182		);
183		}
184
185	8	$message = array_pop($this->pendingMessages[$category][$token]);
186		/** @psalm-suppress DocblockTypeContradiction See {@link https://github.com/vimeo/psalm/issues/7376} */
187	8	if (empty($this->pendingMessages[$category][$token])) {
188	8	unset($this->pendingMessages[$category][$token]);
189
190	8	if (empty($this->pendingMessages[$category])) {
191	8	unset($this->pendingMessages[$category]);
192		}
193		}
194
195	8	if (array_key_exists('beginTime', $context)) {
196	1	throw new InvalidArgumentException('Forbidden to override "beginTime" in context.');
197		}
198
199	7	if (array_key_exists('beginMemory', $context)) {
200	1	throw new InvalidArgumentException('Forbidden to override "beginMemory" in context.');
201		}
202
203	6	$context = array_merge(
204	6	$message->context(),
205		$context,
206		[
207	6	'endTime' => microtime(true),
208	6	'endMemory' => memory_get_usage(),
209		]
210		);
211		/**
212		* @psalm-var array&array{
213		* beginTime: float,
214		* endTime: float,
215		* beginMemory: int,
216		* endMemory: int,
217		* } $context
218		*/
219
220	6	$context['duration'] = $context['endTime'] - $context['beginTime'];
221	6	$context['memoryDiff'] = $context['endMemory'] - $context['beginMemory'];
222
223	6	$this->messages[] = new Message($category, $message->token(), $context);
224	6	$this->nestedLevel--;
225	6	}
226
227	1	public function findMessages(string $token): array
228		{
229	1	$messages = $this->messages;
230	1	return array_filter($messages, static function (Message $message) use ($token) {
231	1	return $message->token() === $token;
232	1	});
233		}
234
235	4	public function flush(): void
236		{
237	4	foreach ($this->pendingMessages as $category => $categoryMessages) {
238	1	$this->logCategoryMessages($category, $categoryMessages);
239		}
240
241	4	$this->pendingMessages = [];
242	4	$this->nestedLevel = 0;
243
244	4	if (empty($this->messages)) {
245	2	return;
246		}
247
248	2	$messages = $this->messages;
249
250		// New messages could appear while the existing ones are being handled by targets.
251	2	$this->messages = [];
252
253	2	$this->dispatch($messages);
254	2	}
255
256		/**
257		* Dispatches the profiling messages to targets.
258		*
259		* @param Message[] $messages The profiling messages.
260		*/
261	2	private function dispatch(array $messages): void
262		{
263	2	foreach ($this->targets as $target) {
264	1	$target->collect($messages);
265		}
266	2	}
267
268		/**
269		* @param string $category
270		* @param array $categoryMessages
271		*
272		* @psalm-param array<string,list<Message>> $categoryMessages
273		*/
274	1	private function logCategoryMessages(string $category, array $categoryMessages): void
275		{
276	1	foreach ($categoryMessages as $token => $messages) {
277	1	if (!empty($messages)) {
278	1	$this->logger->log(
279	1	LogLevel::WARNING,
280	1	sprintf(
281	1	'Unclosed profiling entry detected: category "%s" token "%s" %s',
282		$category,
283		$token,
284	1	__METHOD__
285		)
286		);
287		}
288		}
289	1	}
290
291	11	private function getCategoryFromContext(array $context): string
292		{
293	11	if (!array_key_exists('category', $context)) {
294	8	return 'application';
295		}
296
297	3	$category = $context['category'];
298	3	if (!is_string($category)) {
299	1	throw new InvalidArgumentException(
300	1	sprintf(
301	1	'Category should be a string, "%s" given.',
302	1	$this->getDebugType($category)
303		)
304		);
305		}
306
307	2	return $category;
308		}
309
310		/**
311		* @param mixed $variable
312		*/
313	3	private function getDebugType($variable): string
314		{
315	3	return is_object($variable) ? get_class($variable) : gettype($variable);
316		}
317		}
318

yiisoft / profiler

Pull Request — master (#42)

Profiler::getTargets() A

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